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

Abstract

The embodiment of the invention provides a heat management assembly, a battery, electric equipment and energy storage equipment. The use performance of the heat management assembly can be improved. The thermal management assembly is used for adjusting the temperature of a battery cell, and comprises a first plate and a second plate which are oppositely arranged; the first pipe is arranged between the first plate and the second plate, and the shape of the section, perpendicular to the extending direction of the first pipe, of the first pipe comprises an arc shape.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of batteries, and particularly to a thermal management component, a battery, an electrical device, and an energy storage device. Background Art

[0002] With the increasing environmental pollution, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor related to its development. During the use of a battery, temperature is one of the factors that have an important impact on the service life and cycle performance of the battery. Too low a temperature may cause a decrease in the charge and discharge efficiency of the battery, resulting in a significant reduction in the performance of the electrical device; too high a temperature may cause a decrease in the charge and discharge capacity of the battery, and in severe cases, a thermal runaway phenomenon may occur.

[0003] Generally, a thermal management component is used to manage the temperature of the battery to regulate the temperature of the battery. With the continuous development of battery technology, higher requirements are put forward for the performance of the thermal management component. Therefore, how to improve the performance of the thermal management component of the battery has become a technical problem to be solved urgently in this field. Summary of the Invention

[0004] 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.

[0005] In a first aspect, a thermal management component is provided for regulating the temperature of a battery cell. The thermal management component includes: a first plate and a second plate disposed opposite to each other; a first pipe disposed between the first plate and the second plate, wherein the shape of a cross-section of the first pipe perpendicular to the extending direction of the first pipe includes an arc.

[0006] In the embodiments of the present application, by disposing the first pipe between the first plate and the second plate, and setting the shape of the cross-section of the extending direction of the first pipe to include an arc structure, in this way, under working conditions such as vibration, impact, and extrusion of the battery, the thermal management component can absorb the acting force of the battery cell on the thermal management component through the arc structure to absorb the tolerance of the battery cell, reduce the risk of damage to the battery cell and the thermal management component, thereby improving the performance of the thermal management component and the performance of the battery.

[0007] In some implementation manners, the first pipe includes: two first connection parts disposed opposite to each other along a direction perpendicular to the thickness direction of the thermal management component, and the first connection parts are connected to the first plate and the second plate.

[0008] In the embodiments of the present application, by setting the first pipe to include two first connection parts oppositely arranged along the thickness direction perpendicular to the heat management component, and the first connection part is connected to the first plate and the second plate, in this way, under working conditions such as vibration, impact, and extrusion of the battery, the heat management component can absorb the acting force of the battery cell on the heat management component through the first connection part, so as to absorb the tolerance of the battery cell, reduce the risk of damage to the battery cell and the heat management component, thereby improving the service performance of the heat management component and the service performance of the battery.

[0009] In some implementation manners, on the plane perpendicular to the extending direction of the first pipe, the shape of the cross-section of the first connection part includes an arc. In this way, in the embodiments of the present application, on the plane perpendicular to the extending direction of the first pipe, by setting the shape of the cross-section of the first connection part to include an arc, so that the heat management component can absorb the acting force of the battery cell on the heat management component through the arc structure of the first connection part, so as to absorb the tolerance of the battery cell, reduce the risk of damage to the battery cell and the heat management component, thereby improving the service performance of the heat management component and the service performance of the battery.

[0010] In some implementation manners, the opening of the arc faces the inside of the first pipe. In this way, in the embodiments of the present application, by setting the opening of the arc to face the inside of the first pipe, the structural strength and stability of the first pipe can be improved. At the same time, under working conditions such as vibration, impact, and extrusion of the battery, the heat management component can absorb the acting force of the battery cell on the heat management component through the arc structure of the first connection part, so as to absorb the tolerance of the battery cell, reduce the risk of damage to the battery cell and the heat management component, thereby improving the service performance of the heat management component and the service performance of the battery.

[0011] In some implementation manners, the first pipe further includes: two second connection parts oppositely arranged along the thickness direction of the heat management component, and the second connection part is connected to the two first connection parts. In this way, in the embodiments of the present application, the first pipe further includes two second connection parts oppositely arranged along the thickness direction of the heat management component, and the second connection part is connected to the two first connection parts to form the first pipe, which can improve the structural strength and stability of the first pipe and facilitate the installation and disassembly of the heat management component.

[0012] In some implementation manners, 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 heat management component, and the deformation space is used to absorb the acting force of the battery cell on the heat management component.

[0013] 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. 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. In this way, under conditions such as vibration, impact, and extrusion of the battery, the thermal management component can also absorb the acting force of the battery cell on the thermal management component through the deformation space to absorb the tolerance of the battery cell, reduce the risk of damage to the battery cell and the thermal management component, thereby improving the service performance of the thermal management component and the service performance of the battery.

[0014] In some implementation manners, a plurality of bending portions are provided on the first pipe along the extending direction of the first pipe. The plurality of bending portions include a first bending portion and a second bending portion, and the bending direction of the first bending portion is opposite to the bending direction of the second bending portion.

[0015] In an embodiment of the present application, a plurality of bending portions are provided on the first pipe along the extending direction of the first pipe. The plurality of bending portions include a first bending portion and a second bending portion, and the bending direction of the first bending portion is opposite to the bending direction of the second bending portion, 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 rate of the thermal management component can be improved.

[0016] In some implementation manners, 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.

[0017] In an embodiment of the present application, by setting 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 to 0.1 ≤ L1 / L2 ≤ 0.4, the circulation performance of the fluid in the first pipe and the bending performance of the first pipe in the thermal management component can be taken into account, that is, the thermal management component can effectively absorb the tolerance generated by the battery cell while adjusting the temperature of the battery cell, and improve the service performance of the thermal management component.

[0018] In some implementations, 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.

[0019] In the embodiments of the present application, by setting 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 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 balanced. That is, the thermal management component can effectively absorb the tolerances generated by the battery cell while regulating the temperature of the battery cell, further improving the service performance of the thermal management component.

[0020] In some implementations, 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.

[0021] In the embodiments of the present application, along the thickness direction of the thermal management component, by setting the ratio between the maximum dimension h1 inside the first pipe and the distance h2 between the first plate and the second plate to: 0.2 ≤ h1 / h2 ≤ 1, the circulation performance of the fluid in the first pipe of the thermal management component and the structural strength of the thermal management component can be balanced. That is, the thermal management component can absorb the tolerances generated by the battery cell while regulating the temperature of the battery cell, improving the service performance of the thermal management component.

[0022] In some implementations, 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. Thus, in the embodiments of the present application, along the thickness direction of the thermal management component, by setting the ratio between the maximum dimension h1 inside the first pipe and the distance h2 between the first plate and the second plate to: 0.7 ≤ h1 / h2 ≤ 0.88, the circulation performance of the fluid in the first pipe of the thermal management component and the structural strength of the thermal management component can be effectively balanced. That is, the thermal management component can effectively absorb the tolerances generated by the battery cell while regulating the temperature of the battery cell, further improving the service performance of the thermal management component.

[0023] In some implementations, the first plate and / or the second plate are adhesively connected to the first pipe. In this way, in the embodiments of the present application, by adhesively connecting the first plate and / or the second plate to the first pipe, when a negative pressure is formed inside the first pipe, since the connection between the first pipe and the first plate and / or the second plate is an adhesive connection, the concave deformation of the first pipe can be effectively reduced, so as to improve the stability and uniformity of the fluid inside the first pipe, and enhance the structural strength of the first pipe, that is, the thermal management component can effectively absorb the tolerances generated by the battery cell while adjusting the temperature of the battery cell, thereby improving the performance of the thermal management component.

[0024] In some implementations, the interior of the first pipe is used to accommodate a fluid to adjust the temperature of the battery cell. In this way, in the embodiments of the present application, by using the interior of the first pipe to accommodate a fluid to adjust the temperature of the battery cell, the risk of thermal runaway of the battery cell can be reduced, thereby improving the performance of the battery.

[0025] In some implementations, the material of the first pipe includes at least one of the following materials: polyphenylene sulfide, polypropylene, poly(dodecanolactam), poly(hexamethylene adipamide), nylon. In this way, in the embodiments of the present application, by setting the material of the first pipe to at least one of the following materials: polyphenylene sulfide, polypropylene, poly(dodecanolactam), poly(hexamethylene adipamide), nylon, the bending performance of the first pipe can be improved, and under working conditions such as when the battery is vibrated, impacted, or extruded, the first pipe can undergo elastic deformation, and after the external force is removed, the first pipe can return to its initial state, that is, the first pipe can absorb the acting force of the battery cell on the thermal management component to reduce the damage to the battery cell, that is, the thermal management component can effectively absorb the tolerances generated by the battery cell while adjusting the temperature of the battery cell, thereby improving the performance of the thermal management component and the performance of the battery.

[0026] In a second aspect, a battery is provided, including a battery cell and a thermal management component as described in any implementation of the first aspect, the thermal management component being used to adjust the temperature of the battery cell.

[0027] In some implementations, the number of the thermal management components is multiple, the multiple thermal management components are arranged at intervals, and a battery cell is arranged between any two adjacent thermal management components.

[0028] In some implementations, the battery cell is adhesively connected to the thermal management component.

[0029] In a third aspect, an electrical device is provided, including the battery as described in any implementation of the second aspect, the battery being used to provide electrical energy for the electrical device.

[0030] In some implementations, the electrical device can be a vehicle, a ship, a spacecraft, or the like.

[0031] In a fourth aspect, an energy storage device is provided, including the battery described in any one of the implementations of the second aspect, and the battery is used to store electrical energy for the energy storage device. Description of the Drawings

[0032] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the drawings without creative efforts.

[0033] Figure 1 It is a schematic structural diagram of a vehicle provided by an embodiment of the present application.

[0034] Figure 2 It is a schematic structural diagram of a battery provided by an embodiment of the present application.

[0035] Figure 3 It is a schematic structural diagram of a battery cell provided by an embodiment of the present application.

[0036] Figure 4 It is a schematic structural diagram of a thermal management component provided by an embodiment of the present application.

[0037] Figure 5 It is a schematic cross-sectional diagram of a thermal management component provided by another embodiment of the present application.

[0038] Figure 6 It is a schematic cross-sectional diagram of a thermal management component provided by another embodiment of the present application.

[0039] Figure 7 It is a schematic cross-sectional diagram of a thermal management component provided by another embodiment of the present application.

[0040] Figure 8 It is a schematic cross-sectional diagram of a thermal management component provided by another embodiment of the present application.

[0041] Figure 9 It is a partial cross-sectional schematic diagram of a thermal management component provided by another embodiment of the present application.

[0042] Figure 10 It is a schematic structural diagram of a battery provided by another embodiment of the present application.

[0043] 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 plate; 213-pressure relief mechanism; 221a-first pole ear; 222a-second pole ear; 214-electrode terminal; 214a-positive electrode terminal; 214b-negative electrode terminal; 50-thermal management component; 510-first plate; 520-second plate; 530-first pipeline; 531-first connecting part; 532-second connecting part; 511-first limiting part; 521-second limiting part; 541-first joint; 542-second joint; 610-clamping space; 611-pipe space; 612-deformation space.

[0044] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0045] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the embodiments of the present application, but cannot be used 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.

[0046] 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 belonging to 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 specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0048] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0050] It should be understood that in the description of the embodiments of the present application, the term "plural" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0051] In the description of the embodiments of the present application, for technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0053] Referring to "embodiments" in the present application means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0054] The battery in the embodiments of the present application refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery mentioned in the present application can include a battery module or a battery pack, etc. The battery generally includes a box body for encapsulating one or more battery cells. The box body can reduce the influence of liquid or other foreign substances on the charging or discharging of the battery cells.

[0055] 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-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0056] In some implementation manners, the battery cells in the embodiments of the present application may be metal batteries. Specifically, the metal batteries may include lithium metal secondary batteries, sodium metal batteries, or magnesium metal batteries, etc.

[0057] In some implementation manners, the battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the short circuit between the positive and negative electrodes and at the same time allow the active ions to pass through.

[0058] In some implementation manners, the positive electrode may be a positive electrode sheet, and the positive electrode sheet 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.

[0059] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

[0060] 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 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 (such as 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.).

[0061] 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 implementation manners, other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, lithium iron phosphate (such as LiFePO4, which can also be abbreviated as LFP for short), 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 manganese iron phosphate, and a composite material of lithium manganese iron phosphate and carbon.

[0062] As an example, the positive electrode active material may include at least one of sodium transition metal oxides, polyanion-type compounds, and Prussian blue compounds:

[0063] In some implementations, the sodium transition metal oxide can be a doped and modified sodium transition metal oxide, and the doping modification of the sodium transition metal oxide can include at least one of sodium-site doping modification, oxygen-site doping modification, transition metal-site doping modification, and surface coating modification.

[0064] In some implementations, the positive electrode can use a foam metal. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc. When the foam metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foam metal, and of course, the positive electrode active material can also be provided. As an example, a lithium source material, potassium metal, or sodium metal can also be filled or / and deposited in the foam metal, and the lithium source material is lithium metal and / or lithium-rich material.

[0065] In some implementations, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative electrode current collector.

[0066] As an example, the negative electrode current collector can use a metal foil, a foam metal, 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, titanium, etc. can be used. The composite current collector can include a polymer material substrate layer and a metal layer. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc. The composite current collector can be formed by forming a metal material (such as copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as substrates of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0067] In some implementations, the battery cell in the embodiments of the present application can be a sodium secondary battery without a negative electrode.

[0068] A sodium secondary battery without a negative electrode refers to a battery cell formed by not actively providing 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 formed at the negative electrode through processes such as coating or deposition to form a negative electrode active material layer. During the first charging, sodium ions gain electrons on the anode side to deposit and form a sodium metal phase on the surface of the current collector. During discharging, the metallic sodium can be converted into sodium ions and return to the positive electrode to achieve cyclic charge and discharge. Compared with other sodium secondary batteries, the battery cell of the sodium secondary battery without a negative electrode can obtain a higher energy density due to the absence of a negative electrode active material layer.

[0069] 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 sodium secondary battery without a negative electrode to improve the electrical conductivity of the negative electrode current collector and the uniformity of the deposited sodium metal.

[0070] In some implementations, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0071] In some implementations, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0072] In some implementations, the separator is a separator membrane. There is no particular limitation on the type of the separator membrane in the embodiments of the present application, and any well-known porous structure separator membrane with good chemical stability and mechanical stability can be selected.

[0073] As an example, the main material of the separator membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0074] In some implementations, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously plays a role in transporting ions and isolating the positive and negative electrodes.

[0075] In some implementations, the battery cell further includes an electrolyte, and the electrolyte plays a role in conducting ions between the positive and negative electrodes. There is no specific limitation on the type of the electrolyte in the embodiments of the present application, and it can be selected according to requirements. The electrolyte can be liquid, gel-like, or solid.

[0076] In some implementations, the electrode assembly can be a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0077] In some implementations, the electrode assembly is a stacked structure. 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 are alternately stacked.

[0078] As an example, multiple positive electrode sheets can be provided, and the negative electrode sheet is folded to form multiple stacked folding segments, and a positive electrode sheet is clamped between adjacent folding segments.

[0079] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple stacked folding segments.

[0080] As an example, multiple separators can be provided and are respectively disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0081] As an example, the separator can be continuously provided and is disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0082] In some implementations, the shape of the electrode assembly can be cylindrical, flat, prismatic, or the like.

[0083] In some implementations, the electrode assembly is provided with tabs, which can conduct current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0084] In some implementations, the battery cell can include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can 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, etc.

[0085] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch 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 multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc.

[0086] To meet different power requirements, the battery in the embodiments of the present application can include a plurality of battery cells. Among them, the plurality of battery cells can be connected in series, parallel, or in a series-parallel combination. The series-parallel combination means a combination of series and parallel. Optionally, the plurality of battery cells can first be connected in series, parallel, or in a series-parallel combination to form a battery module, and then a plurality of battery modules are connected in series, parallel, or in a series-parallel combination to form a battery. That is to say, the plurality of battery cells can directly form a battery, or can first form a battery module, and then the battery module forms a battery. The battery is further arranged in an electrical device to provide electrical energy for the electrical device.

[0087] With the increasing aggravation of environmental pollution, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor related to its development. Temperature has a significant impact on the performance of the battery. For example, during the charging and driving of a vehicle, the battery will generate a large amount of heat. The continuous accumulation of heat will cause the capacity and life of the battery to decrease to varying degrees. If the heat accumulated in the battery cannot be dissipated in time, it will lead to thermal runaway of the battery, and in severe cases, there will be violent combustion and explosion, seriously threatening the life and property safety of consumers. Therefore, the battery can be thermally managed through a thermal management component to regulate the temperature of the battery.

[0088] In current thermal management components, a design of a corrugated tube plate is usually adopted. A plurality of cooling channels extending along the length direction of the corrugated tube plate are formed inside the corrugated tube plate. The plurality of cooling channels are arranged in parallel along the width direction of the corrugated tube plate for coolant to flow through. In the current design, the inside of the corrugated tube plate is a square cooling channel that is straight up and down, making it difficult for the corrugated tube plate to be compressed and deformed during actual use, and it is difficult to absorb the tolerances of battery grouping, and it is easy to cause the risk of damage to the thermal management component or the battery under working conditions such as vibration, impact, and extrusion of the battery. Therefore, how to improve the performance of the thermal management component of the battery has become an urgent technical problem in this field.

[0089] In view of this, an embodiment of the present application provides a thermal management component for regulating the temperature of battery cells. The thermal management component includes: a first plate and a second plate arranged opposite to each other; a first pipeline, and the first pipeline is arranged between the first plate and the second plate. Among them, the shape of the cross-section of the first pipeline perpendicular to the extension direction of the first pipeline includes an arc. In this way, by arranging the first pipeline between the first plate and the second plate, and setting the shape of the cross-section of the extension direction of the first pipeline to include an arc structure, under working conditions such as vibration, impact, and extrusion of the battery, the thermal management component can absorb the acting force of the battery cell on the thermal management component through the arc structure to absorb the tolerances of the battery cell, reduce the risk of damage to the battery cell and the thermal management component, thereby improving the performance of the thermal management component and the performance of the battery.

[0090] The electrical equipment can be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes airplanes, rockets, space shuttles, and spaceships, etc.; the electric toys include fixed or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc.; the electric tools include metal cutting tools, grinding electric tools, assembly electric tools, and electric tools for railways, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planers, etc.

[0091] It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the above-described electrical equipment, but also applicable to all equipment using batteries. For the sake of simplicity in the following embodiments, the electrical equipment is taken as an example of a vehicle for a detailed description.

[0092] For example, as Figure 1As shown in the figure, it is a schematic structural diagram of a vehicle 1 provided by an embodiment of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery 10 can be arranged inside the vehicle 1. The controller 30 is used to control the power supply of the battery 10 to the motor 40. For example, the battery 10 can be arranged at the bottom, the front or the rear of the vehicle 1. The battery 10 can be used for the power supply of the vehicle 1. For example, the battery 10 can be used as the operating power supply of the vehicle 1 and is used for the circuit system of the vehicle 1, such as the working power consumption requirements for starting, navigation and running of the vehicle 1. In another implementation manner of the present application, the battery 10 can not only be used as the operating power supply of the vehicle 1, but also be used as the driving power supply of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0093] 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 can include at least one battery cell group. The battery cell group includes a plurality of battery cells. Among them, the plurality of battery cells can be electrically connected in series, in parallel or in a combination of series and parallel (wherein the combination of series and parallel means a mixture of series and parallel) to form the battery 10. The battery 10 can also be referred to as a battery pack. For example, a plurality of battery cells can first be combined in series, in parallel or in a combination of series and parallel to form a battery module, and then a plurality of battery modules are combined in series, in parallel or in a combination of series and parallel to form the battery 10. That is to say, a plurality of battery cells can directly form the battery 10, or can first form a battery module and then form the battery 10 from the battery modules.

[0094] In some implementation manners, the battery 10 can include a plurality of battery cells. For example, as Figure 2 shown, it is a schematic structural diagram of a battery 10 according to an embodiment of the present application. The battery 10 can include a plurality of battery cells 20. The battery 10 can further include a box body 11. The interior of the box body 11 is a hollow structure, and a plurality of battery cells 20 are accommodated in the box body 11. For example, a plurality of battery cells 20 are placed in the box body 11 after being connected in parallel, in series or in a combination of series and parallel.

[0095] In some implementation manners, the battery 10 can further include other structures, which will not be elaborated one by one here. For example, the battery 10 can further include a busbar component, and the busbar component is used to realize the electrical connection between a plurality of battery cells 20, such as in parallel, in series or in a combination of series and parallel. Specifically, the busbar component can realize the electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electric energy of the plurality of battery cells 20 can be further led out through a conductive mechanism passing through the box body. Optionally, the conductive mechanism can also belong to the busbar component.

[0096] In the embodiments of the present application, according to different power demands, the number of battery cells 20 can be set to any value. Multiple battery cells 20 can be connected in series, parallel, or in a hybrid connection to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be relatively large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 forms a battery module. The number of battery cells 20 included in a battery module is not limited and can be set according to requirements. The battery 10 can include multiple battery modules, and these battery modules can be connected in series, parallel, or in a hybrid connection.

[0097] As Figure 3 shown, 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 housing 211, and a cover plate 212. The housing 211 and the cover plate 212 form an outer shell 21 or a battery case. The walls of the housing 211 and the walls of the cover plate 212 are both referred to as the walls of the battery cell 20. For a cuboid-shaped battery cell 20, the walls of the housing 211 include a bottom wall and four side walls. The housing 211 is determined according to the shape after combining one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid, cube, or cylinder, and one of the surfaces of the housing 211 has an opening so that one or more electrode assemblies 22 can be placed inside the housing 211. For example, when the housing 211 is a hollow cuboid or cube, one of the flat surfaces of the housing 211 is the opening surface, that is, this plane does not have a wall body and makes the inside and outside of the housing 211 communicate. When the housing 211 can be a hollow cylinder, the end face of the housing 211 is the opening surface, that is, this end face does not have a wall body and makes the inside and outside of the housing 211 communicate. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for placing the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0098] The battery cell 20 may further include two electrode terminals 214, and the two electrode terminals 214 can be arranged on the cover plate 212. The cover plate 212 is usually in a flat plate shape, and the two electrode terminals 214 are fixed on the flat plate surface of the cover plate 212. The two electrode terminals 214 are a positive electrode terminal 214a and a negative electrode terminal 214b respectively. Each electrode terminal 214 is correspondingly provided with a connecting member, or can also be called a current collecting member, which is located between the cover plate 212 and the electrode assembly 22 and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0099] As Figure 3 shown, each electrode assembly 22 has a first tab 221a and a second tab 222a. The first tab 221a and the second tab 222a have opposite polarities. For example, when the first tab 221a is a positive electrode tab, the second tab 222a is a negative electrode tab.

[0100] In the battery cell 20, according to actual usage requirements, the electrode assembly 22 can be set to be single or multiple. For example, Figure 3 as shown, two independent electrode assemblies 22 are provided in the battery cell 20.

[0101] A pressure relief mechanism 213 can also be provided on the battery cell 20. The pressure relief mechanism 213 is used to actuate to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0102] The pressure relief mechanism 213 can be various possible pressure relief structures. For example, the pressure relief mechanism 213 can be a temperature-sensitive pressure relief mechanism, and the temperature-sensitive pressure relief mechanism is configured to be able to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and / or, the pressure relief mechanism 213 can be a pressure-sensitive pressure relief mechanism, and the pressure-sensitive pressure relief mechanism is configured to be able to rupture when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

[0103] Figure 4 The structure diagram of a thermal management component 50 provided by an embodiment of the present application is shown. Figure 5 The cross-sectional view of a thermal management component 50 provided by another embodiment of the present application is shown. Figure 6 The cross-sectional view of a thermal management component 50 provided by another embodiment of the present application is shown. Figure 7 The cross-sectional view of a thermal management component 50 provided by another embodiment of the present application is shown. Figure 8 The cross-sectional view of a thermal management component 50 provided by still another embodiment of the present application is shown. Figure 9 The partial cross-sectional view of a thermal management component 50 provided by another embodiment of the present application is shown.

[0104] It should be understood that in the embodiments of the present application, for the convenience of description, as Figures 4 to 9 shown, the direction Z can be the thickness direction or the height direction of the thermal management component 50, or this direction Z can be perpendicular to the plane where the first plate 510 or the second plate 520 is located, or this direction Z can also be the thickness direction of the first pipeline 530, and this direction Z is perpendicular to the direction X and the direction Y; the direction X can be the length direction of the thermal management component 50, and this direction X is perpendicular to this direction Z and this direction Y; the direction Y can be the width direction of the thermal management component 50, and this direction Y is perpendicular to this direction Z and this direction X.

[0105] In some implementation manners, such as Figures 4 to 9As shown, 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 disposed between the first plate 510 and the second plate 520. Wherein, the shape of the cross-section of the first pipe 530 perpendicular to the extending direction of the first pipe 530 includes an arc.

[0106] 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 so that the temperature of the battery 10 is relatively stable, thereby improving the working efficiency of the battery 10.

[0107] 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. Exemplarily, the shapes of the first plate 510 and the second plate 520 in the direction perpendicular to the thickness direction of the thermal management component 50 include but are not limited to a rectangle, a polygon, and a circle.

[0108] It should also be understood that the first pipe 530 is used to communicate with an external cooling system, and the external cooling system can deliver a coolant into the first pipe 530 to achieve the regulation of the temperature of the battery cell 20. In some implementation manners, as Figure 5 and Figure 6 shown, one end of the first pipe 530 is provided with a first joint 541, and the other end of the first pipe 530 is provided with a second joint 542. The first joint 541 and one end of the first pipe 530 can be fixedly connected by welding or bonding, and the second joint 542 and the other end of the first pipe 530 can be fixedly connected by welding or bonding. Both the first joint 541 and the second joint 542 are in communication with an external circulation system. Exemplarily, when the first joint 541 is set as the liquid inlet of the first pipe 530, the second joint 542 can be the liquid outlet of the first pipe 530.

[0109] It should also be understood that in the embodiments of the present application, at both ends of the first plate 510 of the thermal management component 50 along the length direction of the thermal management component 50, a first limiting portion 511 is provided respectively, and at both ends of the second plate 520 of the thermal management component 50 along the length direction of the thermal management component 50, a second limiting portion 521 is provided respectively. 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 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 each other. Specifically, the first limiting portion 511 and the second limiting portion 522 are used to connect with the first joint 541 or the second joint 542 above to limit the first joint 541 or the second joint 542. Exemplarily, the first limiting portion 511 and the second limiting portion 521 may be Figure 4 the concave portions shown in, and the concave portions are used to accommodate part of the first joint 541 or part of the second joint 542. It should also be understood that in the embodiments of the present application, the shape of the concave portion in a plane perpendicular to the thickness direction of the thermal management component 50 can be set according to actual needs. For example, the shape of the concave portion in a plane perpendicular to the thickness direction of the thermal management component 50 can be arc-shaped, semi-circular or polygonal.

[0110] It should also be understood that in the embodiments of the present application, the shape of the cross-section of the first pipe 530 perpendicular to the extending direction of the first pipe 530 may include: circular, oval or rounded rectangle.

[0111] It should also be understood that in the embodiments of the present application, the interior of the first pipe 530 can be used to accommodate a fluid or a solid-liquid phase change material to adjust the temperature of the battery cell 20. Wherein, the fluid can be a liquid or a gas, and the original state of the solid-liquid phase change material is solid and can become liquid after absorbing heat. Adjusting the temperature means heating or cooling the battery cell 20. In the case of cooling or lowering the temperature of the battery cell 20, the thermal management component 50 is used to accommodate a cooling fluid or a solid-liquid phase change material to lower the temperature of the battery cell 20. At this time, the thermal management component 50 can also be called a cooling component, a cooling system or a cooling plate, etc., and the fluid it accommodates can also be called a cooling medium or a cooling fluid, and more specifically, it can be called a coolant or a cooling gas. In addition, the thermal management component 50 in the embodiments of the present application can also be used for heating to raise the temperature of the battery cell 20. Optionally, the fluid in the embodiments of the present application can flow cyclically to achieve a better temperature adjustment effect. Optionally, the above-mentioned fluid can be water, a mixture of water and ethylene glycol or air, etc.

[0112] In the embodiments of the present application, by disposing the first pipe 530 between the first plate 510 and the second plate 520, and setting the shape of the cross-section of the first pipe 530 in the extending direction thereof to include an arc structure, in this way, when the battery 10 is under working conditions such as vibration, impact, and extrusion, the thermal management component 50 can absorb the acting force of the battery cell 20 on the thermal management component 50 through the arc structure, so as to absorb the tolerance of the battery cell 20, reduce the risk of damage to the battery cell 20 and the thermal management component 50, thereby improving the service performance of the thermal management component 50 and the service performance of the battery 10.

[0113] In some implementation manners, such as Figure 7 shown, the first pipe 530 includes: two first connection portions 531 oppositely disposed along the thickness direction perpendicular to the thermal management component 50, and the first connection portions 531 are connected to the first plate 510 and the second plate 520. Exemplarily, in the embodiments of the present application, the first pipe 530 may be formed by enclosing the two first connection portions 531, the first plate 510, and the second plate 520.

[0114] In the embodiments of the present application, by setting the first pipe 530 to include two first connection portions 531 oppositely disposed along the thickness direction perpendicular to the thermal management component 50, and the first connection portions 531 are connected to the first plate 510 and the second plate 520, in this way, when the battery 10 is under working conditions such as vibration, impact, and extrusion, the thermal management component 50 can absorb the acting force of the battery cell 20 on the thermal management component 50 through the first connection portions 531, so as to absorb the tolerance of the battery cell 20, reduce the risk of damage to the battery cell 20 and the thermal management component 50, thereby improving the service performance of the thermal management component 50 and the service performance of the battery 10.

[0115] In some implementation manners, on the plane perpendicular to the extending direction of the first pipe 530, the shape of the cross-section of the first connection portion 531 includes an arc. Exemplarily, as Figure 7 shown, on the plane perpendicular to the extending direction of the first pipe 530, the shape of the cross-section of the first connection portion 531 is an arc, for example, it may be a semi-circle. In other implementation manners, on the plane perpendicular to the extending direction of the first pipe 530, a partial structure of the shape of the cross-section of the first connection portion 531 is an arc, for example, a portion of the first connection portion 531 close to the first plate 510 or the second plate 520 is set as an arc.

[0116] In the embodiments of the present application, on a plane perpendicular to the extending direction of the first pipe 530, by setting the shape of the cross-section of the first connecting portion 531 to include an arc, the heat management component 50 can absorb the acting force of the battery cell 20 on the heat management component 50 through the arc structure of the first connecting portion 531, so as to absorb the tolerance of the battery cell 20, reduce the risk of damage to the battery cell 20 and the heat management component 50, thereby improving the service performance of the heat management component 50 and the service performance of the battery 10.

[0117] In some implementation manners, as Figure 7 shown, the opening of the arc faces the inside of the first pipe 530. In this way, in the embodiments of the present application, by setting the opening of the arc to face the inside of the first pipe 530, the structural strength and stability of the first pipe 530 can be improved. At the same time, under working conditions such as vibration, impact, and extrusion of the battery 10, the heat management component 50 can absorb the acting force of the battery cell 20 on the heat management component 50 through the arc structure of the first connecting portion 531, so as to absorb the tolerance of the battery cell 20, reduce the risk of damage to the battery cell 20 and the heat management component 50, thereby improving the service performance of the heat management component 50 and the service performance of the battery 10.

[0118] In some implementation manners, as Figure 8 shown, the first pipe 530 further includes: two second connecting portions 532 oppositely arranged along the thickness direction of the heat management component 50, and the second connecting portions 532 are connected to the two first connecting portions 531. Exemplarily, the two second connecting portions 532 and the two first connecting portions 531 can enclose to form the first pipe 530.

[0119] It should be understood that in the embodiments of the present application, the two second connecting portions 532 include a second upper connecting portion close to the first plate 510 and a second lower connecting portion close to the second plate 520. At least part of the second upper connecting portion can be attached and connected to the first plate 510, and at least part of the second lower connecting portion can be attached and connected to the second plate 520.

[0120] In the embodiments of the present application, the first pipe 530 further includes two second connecting portions 532 oppositely arranged along the thickness direction of the heat management component 50, and the second connecting portions 532 are connected to the two first connecting portions 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 heat management component 50.

[0121] In some implementation manners, as Figure 7 and Figure 8As shown, 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 communicates with 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.

[0122] 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.

[0123] It should also be understood that in the embodiment of the present application, the deformation space 612 is the space 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. Under conditions such as vibration, impact, and extrusion of the battery 10, that is, the battery cell 20 will exert a force on the first plate 510 or the second plate 520. The deformation space 612 can absorb the force exerted by 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 exerted by 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.

[0124] 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 component 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 communicates with the outside of the thermal management component 50, and the deformation space 612 is used to absorb the force exerted by the battery cell 20 on the thermal management component 50. In this way, under conditions such as vibration, impact, and extrusion of the battery 10, the thermal management component 50 can also absorb the force exerted by the battery cell 20 on the thermal management component 50 through the deformation space 612 to absorb the tolerance of the battery cell 20 and reduce 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.

[0125] In some implementation manners, a plurality of bending portions are provided along the extending direction of the first pipe 530. The plurality of bending portions include a first bending portion and a second bending portion, and the bending direction of the first bending portion is opposite to the bending direction of the second bending portion.

[0126] In an embodiment of the present application, a plurality of bending portions are provided along the extending direction of the first pipeline 530. The plurality of bending portions include a first bending portion and a second bending portion, and the bending direction of the first bending portion is opposite to that of the second bending portion, which can improve the flow performance of the fluid in the first pipeline 530 and the stress distribution inside the first pipeline 530. At the same time, compared with a straight pipeline, the effective length of the first pipeline 530 can be increased to improve the heat exchange efficiency of the thermal management component 50 and the space utilization rate of the thermal management component 50.

[0127] In some implementation manners, as Figures 7 to 9 shown, on a first plane perpendicular to the extending direction of the first pipeline 530, the first plane intersects the thermal management component 50, and the first pipeline 530 includes a plurality of first cross-sections on the first plane. The ratio between the distance L1 between any two adjacent first cross-sections and the dimension L2 of the first pipeline 530 in the direction perpendicular to the length of the thermal management component 50 satisfies: 0.1 ≤ L1 / L2 ≤ 0.4.

[0128] It should be understood that in an embodiment of the present application, if the distance L1 between any two adjacent first cross-sections is relatively small compared with the dimension L2 of the first pipeline 530 in the direction perpendicular to the length of the thermal management component 50, the inner side of the bending portion is subjected to greater force during the bending process of the first pipeline 530, and the stress distribution is concentrated, resulting in a risk of cracking of the first pipeline 530, reducing the bending performance of the first pipeline 530, and affecting the use performance of the thermal management component 50. If the distance L1 between any two adjacent first cross-sections is relatively large compared with the dimension L2 of the first pipeline 530 in the direction perpendicular to the length of the thermal management component 50, the dimension of the first cross-section in the first direction is relatively small, that is, the space for the fluid that can be accommodated in the first pipeline 530 is small, resulting in a reduction in the heat exchange effect of the thermal management component 50 and affecting the use performance of the thermal management component 50.

[0129] It should also be understood that the distance L1 between any two adjacent first cross-sections in an embodiment of the present application refers to the maximum distance, minimum distance, or average distance between the mutually approaching side walls of two adjacent first cross-sections in the direction perpendicular to the length of the thermal management component 50.

[0130] Exemplarily, the ratio between the distance L1 between any two adjacent first cross-sections in the embodiments of the present application and the dimension L2 of the first pipe 530 in the direction perpendicular to the length direction of 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, 0.19, 0.2, 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 the value is within the range obtained by combining any two of the above values.

[0131] In the embodiments of the present application, by setting the ratio between the distance L1 between any two adjacent first cross-sections and the dimension L2 of the first pipe 530 in the direction perpendicular to the length direction of 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, and the service performance of the thermal management component 50 can be improved.

[0132] In some implementation manners, as Figures 7 to 9 shown, on the first plane perpendicular to the extending direction of the first pipe 530, the first plane intersects with the thermal management component 50, the first pipe 530 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 530 in the direction perpendicular to the length direction of the thermal management component 50 satisfies: 0.15 ≤ L1 / L2 ≤ 0.27. In this way, in the embodiments of the present application, by setting the ratio between the distance L1 between any two adjacent first cross-sections and the dimension L2 of the first pipe 530 in the direction perpendicular to the length direction of the thermal management component 50 to 0.15 ≤ L1 / L2 ≤ 0.27, 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 effectively taken into account, that is, the thermal management component 50 can effectively absorb the tolerances generated by the battery cell 20 while adjusting the temperature of the battery cell 20, and further improve the service performance of the thermal management component 50.

[0133] In some implementation manners, as Figure 7 shown, along the thickness direction of the thermal management component 50, the ratio between the maximum dimension h1 inside the first pipe 530 and the distance h2 between the first plate 510 and the second plate 520 satisfies: 0.2 ≤ h1 / h2 ≤ 1.

[0134] It should be understood that in the embodiments of the present application, along the thickness direction of the thermal management component 50, if the maximum dimension h1 inside the first pipe 530 is smaller than the distance h2 between the first plate 510 and the second plate 520, it is likely to result in less cooling fluid or solid-liquid phase change material that can be accommodated inside the first pipe 530, affecting the circulation performance of the fluid inside the first pipe 530 and reducing the service performance of the thermal management component 50. At the same time, it is likely to make the thickness of the first plate 510 and / or the second plate 520 thicker, resulting in a higher structural strength of the first plate 510 and / or the second plate 520. Under conditions such as vibration, impact, and extrusion of the battery 10, it is difficult for the first plate 510 and / or the second plate 520 to deform, making it difficult for the thermal management component 50 to absorb the force exerted by the battery 10 on the thermal management component 50, that is, it is difficult to absorb the tolerance of the battery cell 20, and it is likely to cause damage to the battery cell 20 and the thermal management component 50. Along the thickness direction of the thermal management component 50, if the maximum dimension h1 inside 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, resulting in a weaker structural strength of the first plate 510 and / or the second plate 520. Under conditions such as vibration, impact, and extrusion of the battery 10, it is likely to cause a risk of damage to the first plate 510 and / or the second plate 520, reducing the service performance of the thermal management component 50.

[0135] It should also be understood that in some implementation manners, when the shape of the cross-section of the first pipe 530 perpendicular to the extension direction of the first pipe 530 is circular, along the thickness direction of the thermal management component 50, the maximum dimension h1 inside 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 elliptical, along the thickness direction of the thermal management component 50, the maximum dimension h1 inside the first pipe 530 is the length of the minor axis of the ellipse.

[0136] It should also be understood that in the embodiments 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.

[0137] Exemplarily, along the thickness direction of the thermal management component 50, the ratio of the maximum dimension h1 inside 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 the value thereof is within the range obtained by combining any two of the above values.

[0138] In the embodiments of the present application, along the thickness direction of the thermal management component 50, by setting the ratio of the maximum dimension h1 inside the first pipe 530 to the distance h2 between the first plate 510 and the second plate 520 to be: 0.2 ≤ h1 / h2 ≤ 1, the circulation performance of the fluid in the first pipe 530 in 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, improving the service performance of the thermal management component 50.

[0139] In some implementation manners, along the thickness direction of the thermal management component 50, the ratio of the maximum dimension h1 inside the first pipe 530 to the distance h2 between the first plate 510 and the second plate 520 satisfies: 0.7 ≤ h1 / h2 ≤ 0.88. In this way, in the embodiments of the present application, along the thickness direction of the thermal management component 50, by setting the ratio of the maximum dimension h1 inside the first pipe 530 to the distance h2 between the first plate 510 and the second plate 520 to be: 0.7 ≤ h1 / h2 ≤ 0.88, the circulation performance of the fluid in the first pipe 530 in the thermal management component 50 and the structural strength of the thermal management component 50 can be effectively taken into account, 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, further improving the service performance of the thermal management component 50.

[0140] In some implementation manners, the first plate 510 and / or the second plate 520 are adhesively connected to the first pipe 530. Exemplarily, the first plate 510 and / or the second plate 520 and the first pipe 530 can be adhesively connected through a thermally conductive structural adhesive to improve the heat conduction efficiency of the thermal management component 50.

[0141] In the embodiment of the present application, by adhesively connecting 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 connection between the first pipe 530 and the first plate 510 and / or the second plate 520 is an adhesive connection, the concave deformation of the first pipe 530 can be effectively reduced, so as to improve the stability and uniformity of the fluid inside the first pipe 530, and enhance the structural strength of the first pipe 530. That is, the thermal management component 50 can effectively absorb the tolerances 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 implementation manners, the inside of the first pipe 530 is used to accommodate a fluid to adjust the temperature of the battery cell 20. In this way, in the embodiment of the present application, by using the inside of the first pipe 530 to accommodate a fluid to adjust the temperature of the battery cell 20, the risk of thermal runaway of the battery cell 20 can be reduced, thereby improving the performance of the battery 10.

[0143] In some implementation manners, the material of the first pipe 530 includes at least one of the following materials: polyphenylene sulfide, polypropylene, polylauryl lactam, polyhexamethylene adipamide, and nylon. In this way, in the embodiment of the present application, by setting the material of the first pipe 530 to at least one of the following materials: polyphenylene sulfide, polypropylene, polylauryl lactam, polyhexamethylene adipamide, and nylon, the bending performance of the first pipe 530 can be improved. And under working conditions such as when the battery 10 is vibrated, impacted, or extruded, the first pipe 530 can undergo elastic deformation, and after the external force is removed, the first pipe 530 can return to its initial state. That is, the first pipe 530 can absorb the acting force of the battery cell 20 on the thermal management component 50 to reduce the damage to the battery cell 20. That is, the thermal management component 50 can effectively absorb the tolerances 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, and further improving the performance of the battery 10.

[0144] Refer to the above again Figures 4 to 9As shown, a thermal management component 50 is provided, which is used to adjust 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. Among them, the shape of the cross-section of the first pipe 530 perpendicular to the extending direction of the first pipe 530 includes an arc. The first pipe 530 includes two first connection parts 531 arranged opposite to each other along the thickness direction of the thermal management component 50. The first connection part 531 is connected to the first plate 510 and the second plate 520. In the plane perpendicular to the extending direction of the first pipe 530, the shape of the cross-section of the first connection part 531 includes an arc, and the opening of the arc faces the inside of the first pipe 530. The first pipe 530 is provided with a plurality of bending parts along the extending direction of the first pipe 530. 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. In a first plane perpendicular to the extending direction of the first pipe 530, the first plane intersects with the thermal management component 50, and the first pipe 530 includes a plurality of first cross-sections on the first plane. The ratio between the distance L1 between any two adjacent first cross-sections and the dimension L2 of the first pipe 530 in the direction perpendicular to the length of the thermal management component 50 satisfies: 0.1 ≤ L1 / L2 ≤ 0.4. Preferably, 0.15 ≤ L1 / L2 ≤ 0.27. Along the thickness direction of the thermal management component 50, the ratio between the maximum dimension h1 inside the first pipe 530 and the distance h2 between the first plate 510 and the second plate 520 satisfies: 0.2 ≤ h1 / h2 ≤ 1. Preferably, 0.7 ≤ h1 / h2 ≤ 0.88.

[0145] Figure 10 The schematic structural diagram of a battery 10 provided by another embodiment of the present application is shown.

[0146] The embodiment of the present application also provides a battery, including a battery cell 20 and the thermal management component 50 in any of the above embodiments. The thermal management component 50 is used to adjust the temperature of the battery cell 20. Exemplarily, the battery may be the battery 10 shown in the above Figure 2 or Figure 10 shown in the figure.

[0147] In some implementation manners, as Figure 10 shown, the number of the thermal management components 50 is multiple, and the multiple thermal management components 50 are arranged at intervals, and the battery cell 20 is arranged between any two adjacent thermal management components 50.

[0148] It should be understood that in the embodiment of the present application, as Figure 10As shown, the first joints 541 between two adjacent thermal management components 50 can be connected through a communication pipeline, and the second joints 542 between two adjacent thermal management components 50 can be connected through a communication pipeline. Subsequently, the connected multiple first joints 541 or second joints 542 are connected to an external circulation system to achieve temperature regulation of the battery cells 20 of the battery 10.

[0149] In some implementation manners, the battery cell 20 is adhesively connected to the thermal management component 50. In this way, in the embodiments of the present application, by adhesively connecting the battery cell 20 to the thermal management component 50, the connection manner is simple and reliable, which is beneficial to reducing the manufacturing cost of the battery 10.

[0150] The embodiments of the present application further provide an electrical device, including the battery 10 in any of the above embodiments, and the battery 10 is used to provide electrical energy for the electrical device. Specifically, the electrical device can be the Figure 1 vehicle 1 shown above, or any electrical device using the battery 10.

[0151] The embodiments of the present application further provide an energy storage device, including the battery 10 in any of the above embodiments, and the battery 10 is used to store electrical energy for the energy storage device.

[0152] Although the present application has been described with reference to the above embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A thermal management component, characterized in that, For temperature regulation of battery cells, the thermal management component includes: A first plate and a second plate disposed opposite to each other; A first pipe, the first pipe being disposed between the first plate and the second plate, wherein the shape of a 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 connection parts disposed opposite to each other along the direction perpendicular to the thickness direction of the thermal management component, the first connection parts being connected to the first plate and the second plate.

3. The thermal management component according to claim 2, wherein In a plane perpendicular to the extending direction of the first pipe, the shape of a cross-section of the first connection part includes an arc.

4. The thermal management component according to claim 3, characterized in that, 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 connection parts disposed opposite to each other along the thickness direction of the thermal management component, the second connection parts being connected to the two first connection 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, In a first plane perpendicular to the extending direction of the first pipe, the first plane intersects the thermal management component, the first pipe includes a plurality of first cross-sections in 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, In a first plane perpendicular to the extending direction of the first pipe, the first plane intersects the thermal management component, the first pipe includes a plurality of first cross-sections in 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, Includes: 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, characterized in that, The number of the thermal management components is plural, the plural 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 supply electrical energy to 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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