Thermal management component, battery and electric device

Abstract

Disclosed are a thermal management component (400), a battery (100) and an electric device. The thermal management component (400) comprises a plate body (10), wherein the plate body (10) encloses a heat exchange cavity (11) for circulation of a heat exchange medium; in the direction of length of the plate body (10), a plurality of supporting portions are provided in the heat exchange cavity (11) at intervals; and the heat exchange cavity (11) comprises a pair of inner walls which are oppositely arranged in the direction of thickness, and the ends of each supporting portion intersect and are connected to at least one inner wall of the heat exchange cavity (11) at an acute angle. The thermal management component (400), the battery (100) and the electric device provided in the embodiments can effectively prevent a casing from cracking.

Description

Thermal management components, batteries, and electrical devices

[0001] / Related Applications

[0002] This application claims priority to Chinese patent application No. 2023231298346, filed on November 20, 2023, entitled “Thermal Management Components, Batteries, and Electrical Devices,” the entire text of which is incorporated herein by reference. Technical Field

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

[0004] Currently, cooling plates with built-in cavities are commonly used on the market, located on the large surface of the battery cells to dissipate heat. Battery cells expand during cycling, so the cooling plates need to free up space to meet the requirements for surface pressure uniformity.

[0005] However, current cooling plates are often not designed differently, resulting in excessive or insufficient local pressure on the battery cells, which in turn leads to lithium deposition or insufficient local strength, resulting in excessive or insufficient expansion gaps in the battery cells, which in turn causes cracks on the shell surface of the battery cells.

[0006] Summary of the Invention

[0007] Based on this, it is necessary to provide a thermal management component, a battery, and an electrical device to address the problem of cracking on the surface of the battery cell shell.

[0008] A first aspect of the present application provides a thermal management component, comprising: a plate body, the plate body being surrounded by a heat exchange cavity for circulating a heat exchange medium, a plurality of support portions being arranged at intervals in the heat exchange cavity along the length direction of the plate body, the heat exchange cavity comprising a pair of inner walls arranged opposite to each other along the thickness direction, and an end portion of the support portion being intersected and connected with at least one inner wall of the heat exchange cavity at an acute angle.

[0009] In one embodiment, the plate body includes a first section and a second section connected in sequence along its length direction, and the first section is closer to the end of the plate body along the length direction than the second section; when the first section and the second section are subjected to the same force, the deformation of the second section is greater than that of the first section.

[0010] In one embodiment, the plate body includes a first section and a second section connected in sequence along its length direction, and the first section is closer to the end of the plate body along the length direction than the second section; the support part includes a plurality of first support parts and a plurality of second support parts, the first support part is supported between the inner walls on both sides of the heat exchange chamber corresponding to the first section, and the second support part is supported between the inner walls on both sides of the heat exchange chamber corresponding to the second section.

[0011] In one embodiment, an angle A is formed between the first support portion and the inner wall of the first section, an angle B is formed between the second support portion and the inner wall of the second section, and B<A is satisfied.

[0012] In one embodiment, 25°≤B<A≤90°.

[0013] In one embodiment, a plurality of first support portions are supported on both sides of the inner walls of the first section at intervals along the length direction of the plate body; the distance between two adjacent first support portions is C; a plurality of second support portions are supported between both sides of the inner walls of the second section at intervals along the length direction of the plate body; the distance between two adjacent second support portions is D, and C<D is satisfied.

[0014] In one embodiment, 3 mm ≤ C < D ≤ 25 mm.

[0015] In one embodiment, the first support portion and the second support portion are both support ribs, the minimum rib thickness of the first support portion is E, the minimum rib thickness of the second support portion is F, and F<E is satisfied.

[0016] In one embodiment, a rounded corner R1 is used to transition between the first support portion and the inner walls on both sides of the first section; a rounded corner R2 is used to transition between the second support portion and the inner walls on both sides of the second section, satisfying R1≥R2.

[0017] In one embodiment, the inner wall stiffness of the first section is greater than the inner wall stiffness of the second section.

[0018] In one embodiment, the minimum wall thickness of the inner wall of the first section is G; the minimum wall thickness of the inner wall of the second section is H, and H<G is satisfied.

[0019] The second aspect of the present application provides a battery, including a battery cell and the above-mentioned thermal management component; the second section is used for thermal connection to the middle of the large surface of the battery cell, and the first section is used for thermal connection to the area near the edge of the large surface of the battery cell.

[0020] A third aspect of the present application provides an electrical device comprising the above-mentioned battery, wherein the battery is used to provide electrical energy.

[0021] The beneficial effects are:

[0022] The thermal management component, battery and electrical device provided by the present application are provided with a plate body, which is surrounded by a heat exchange cavity for circulating a heat exchange medium. Along the length direction of the plate body, a plurality of support parts are arranged at intervals in the heat exchange cavity. The heat exchange cavity includes a pair of inner walls arranged relative to each other along the thickness direction, and the end of the support part is connected to at least one inner wall of the heat exchange cavity at an acute angle. In this way, on the one hand, the support part can be supported on the inner wall of the heat exchange cavity, so that the thermal management component has a certain rigidity, and the volume expansion of the electrode assembly during the charge and discharge cycle can be caused by the thermal management component. The thermal management component can be attached to the battery cell to provide uniform support and cooling effect; on the other hand, since the end of the support part is connected to the inner wall of the heat exchange cavity at an acute angle, when the battery is deformed and expanded, the inclined support part can be slightly deformed to adapt to the expansion requirements of different positions of the battery cell; ultimately, the shell of the battery cell is effectively prevented from cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces 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 those skilled in the art, other drawings can be obtained based on the drawings without inventive work. In the drawings:

[0024] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0025] FIG2 is a schematic diagram of the exploded structure of a battery provided in some embodiments of the present application.

[0026] FIG3 is a schematic structural diagram of a battery module provided in some embodiments of the present application.

[0027] FIG4 is a schematic diagram of the assembly of a battery cell and a thermal management component provided in some embodiments of the present application.

[0028] FIG5 is a schematic structural diagram of a thermal management component provided in some embodiments of the present application, wherein the dotted line is the boundary line between the first section and the second section.

[0029] FIG6 is a JJ cross-sectional view of the structure shown in FIG5 , wherein the dotted line is the boundary line between the first section and the second section.

[0030] Reference numerals

[0031] Thermal management component 400, plate 10, heat exchange chamber 11, first section 12, second section 13, first support portion 20, second support portion 30. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of the present application, if the technical terms "first" and "second" appear, these terms are only used for descriptive purposes 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.

[0035] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present 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 herein may be combined with other embodiments.

[0036] 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.

[0037] In the description of the embodiments of this application, if the term "plurality" appears, "plurality" means at least two (including two), for example, two, three, etc., unless otherwise specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" means two or more groups (including two), and if the term "multiple sheets" appears, "multiple sheets" means two or more sheets (including two).

[0038] In the description of the embodiments of the present application, if the 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. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if technical terms such as "installed", "connected", "connected", and "fixed" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0042] Currently, market developments indicate that power batteries are becoming increasingly widely used. Power batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields. As power battery applications continue to expand, market demand is also growing.

[0043] In related technologies, battery cells expand in volume during their charge and discharge cycles. Because the battery cell housing and the end cap are typically welded, the initial opening of the housing is at the top. Therefore, the restraining force exerted by the top of the housing on the electrode assembly (JR) is less than the restraining force exerted by the closed bottom. This imbalance in restraint leads to the risk of housing cracking at the end of the battery cycle.

[0044] In order to alleviate the problem of cracking on the surface of the battery cell shell, the thermal management component can be designed accordingly with differentiation; the top of the shell is used to cooperate with one end of the thermal management component to ensure that the end of the thermal management component that cooperates with the top of the shell has a large pressure-bearing capacity. In this way, the end of the thermal management component and the shell jointly restrain JR and the top of the shell, thereby preventing the battery cell from having excessive or insufficient local pressure, and effectively alleviating the cracking of the shell.

[0045] Some embodiments of the present application provide a thermal management component, a battery, and an electrical device. The electrical device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the spacecraft may include airplanes, rockets, space shuttles, and spacecraft, among others.

[0046] It should be understood that the technical solutions generally described in the embodiments of the present application are not limited to the batteries and electrical devices described above, but can also be applied to all batteries including boxes and electrical devices using batteries. However, for the sake of simplicity of description, an electrical device in an embodiment of the present application is taken as an example of vehicle 1000.

[0047] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0048] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0049] Figure 2 is an exploded view of a battery 100 provided in some embodiments of the present application; Figure 3 is a schematic diagram of the structure of a battery module provided in some embodiments of the present application. Referring to Figures 2 and 3, to meet different power requirements, the battery 100 may include multiple battery cells 121 and a housing 110. A battery cell 121 is the smallest unit that makes up a battery module 120 or battery pack. Multiple battery cells 121 can be connected in series and / or in parallel via electrode terminals for various applications. The battery 100 referred to in this application is a battery pack.

[0050] The box 110 is used to accommodate the battery cells 121 or the battery modules 120 to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 121 .

[0051] The housing 110 can have various structures. In some embodiments, the housing 110 can include a first portion 111 and a second portion 112. The first portion 111 and the second portion 112 overlap each other, and together define a storage space for accommodating the battery cells 121. The second portion 112 can be a hollow structure with one end open, and the first portion 111 can be a plate-like structure. The first portion 111 overlaps the open side of the second portion 112, so that the first portion 111 and the second portion 112 together define the storage space. The first portion 111 and the second portion 112 can also be hollow structures with one end open, with the open side of the first portion 111 overlapping the open side of the second portion 112. Of course, the housing 110 formed by the first portion 111 and the second portion 112 can have various shapes, such as a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as rectangular parallelepipeds, cylinders, or spheres. This is not limited in the present embodiments. The material of the box body 110 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin, and the embodiment of the present application is not limited to this.

[0052] In the embodiments of the present application, multiple battery cells 121 can be directly assembled into a battery pack, or they can be first assembled into a battery module 120, which can then be assembled into a battery pack. Specifically, multiple battery cells 121 can be directly connected in series, parallel, or in a hybrid manner to form a whole, which can then be housed within the housing 110. Alternatively, multiple battery cells 121 can be first connected in series, parallel, or in a hybrid manner to form a battery module 120, which can then be assembled into a whole, which can then be housed within the housing 110.

[0053] The battery 100 may further include other structures. For example, the battery 100 may further include a busbar component for achieving electrical connection between the plurality of battery cells 121 .

[0054] Each battery cell 121 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 121 can be cylindrical, flat, rectangular, or in other shapes. Battery cells 121 are generally divided into three types based on the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells. The embodiments of this application do not limit this. However, for the sake of simplicity, the following embodiments are all described using a square lithium-ion battery cell 121 as an example.

[0055] Please refer to Figure 4, which is a schematic diagram of the exploded structure of a battery cell 121 provided in some embodiments of the present application. The battery cell 121 includes an end cap 122, a housing 123, an electrode assembly 124, and other functional components.

[0056] The end cap 122 is a component that covers the opening of the housing 123 to isolate the internal environment of the electrode assembly 124 from the external environment. The shape of the end cap 122 can be adapted to the shape of the housing 123 to fit the housing 123. In some embodiments, the end cap 122 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents the end cap 122 from deforming when subjected to compression or collision, thereby enhancing the structural strength and safety of the battery cell 121. Functional components such as the electrode terminal 125 can be provided on the end cap 122. The electrode terminal 125 can be used to electrically connect to the electrode assembly 124 to transmit or receive electrical energy from the battery cell 121. In some embodiments, the end cap 122 can also be provided with a pressure relief mechanism to release internal pressure when the internal pressure or temperature of the battery cell 121 reaches a threshold. The end cap 122 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this is not particularly limited in the present embodiment. In some embodiments, an insulating member may be provided inside the end cap 122 to isolate the electrical connection components in the housing 123 from the end cap 122 to reduce the risk of short circuit.

[0057] The shell 123 is a component used to cooperate with the end cover 122 to form the internal environment of the battery cell 121, wherein the internal environment formed can be used to accommodate the electrode assembly 124, electrolyte and other components. The shell 123 and the end cover 122 can be independent components, and an opening can be set on the shell 123, and the internal environment of the battery cell 121 is formed by covering the opening with the end cover 122. The shell 123 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 123 can be determined according to the specific shape and size of the electrode assembly 124. The material of the shell 123 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0058] The electrode assembly 124 is a component in the battery cell 121 where electrochemical reactions occur, and is commonly referred to as a JR assembly. One or more electrode assemblies 124 may be contained in the housing 123. The electrode assembly 124 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 124, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a tab (not shown). The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals 125 to form a current loop.

[0059] A heat management component 400 is provided between two vertically opposite surfaces of the two battery cells 121 , specifically, between two large surfaces or between two side surfaces, so as to cool the battery cells 121 .

[0060] A first aspect of the present application provides a thermal management component 400 . The thermal management component 400 may be a plate structure with a medium flowing inside for thermal management of battery cells to prevent them from overheating or overcooling.

[0061] 5 and 6 , FIG5 is a schematic diagram of the structure of a thermal management component provided in some embodiments of the present application;

[0062] Fig. 6 is a JJ cross-sectional view of the structure shown in Fig. 5. The thermal management component 400 includes: a plate body 10, a plurality of first support portions 20, and a plurality of second support portions 30.

[0063] The plate body 10 is surrounded by a heat exchange cavity 11 for circulating the cooling medium. The plate body 10 can be made of a high-thermal-conductivity aluminum alloy, such as AA6061 or AA7075, to ensure effective cooling of the battery cells 121. The heat exchange cavity 11 can be welded, such as by TIG (argon arc welding) or MIG (metal inert gas welding), to ensure reliable circulation of the cooling medium.

[0064] Along the length of the plate 10, multiple support portions are spaced apart within the heat exchange cavity 11. The heat exchange cavity 11 includes a pair of inner walls arranged opposite each other along the thickness direction, and the ends of the support portions intersect and connect with at least one inner wall of the heat exchange cavity 11 at an acute angle. This allows, on the one hand, the support portions to be supported on the inner wall of the heat exchange cavity 11, giving the thermal management component 400 a certain degree of rigidity. As the electrode assembly 124 expands in volume during the charge and discharge cycles, the thermal management component 400 can be attached to the battery cell 121, providing uniform support and cooling. On the other hand, because the ends of the support portions intersect and connect with the inner wall of the heat exchange cavity 11 at an acute angle, when the battery 100 deforms and expands, the inclined support portions can deform slightly to accommodate the expansion requirements of different positions of the battery cell 121, ultimately effectively preventing cracking of the housing 123 of the battery cell 121.

[0065] In some possible embodiments, referring to Figures 1 to 5, the plate body 10 includes a first section 12 and a second section 13 connected in sequence along its length direction, the second section 13 can be used to be attached to the large side surface of the battery cell, and the first section 12 is used to be attached to the area of ​​the large side surface of the battery cell near the end; the first section 12 is closer to the end of the plate body 10 along the length direction than the second section 13.

[0066] When the first and second sections 12, 13 are subjected to the same force, the second section 13 deforms more than the first section 12. In other words, the inner wall stiffness of the first section 12 is greater than that of the second section 13, and the second section 13 deforms more easily than the first section 12. This allows the thermal management component 400 to adapt to the expansion requirements of different locations on the battery cell 121. Specifically, the first section 12 can be attached to areas of the battery cell 121 that are prone to expansion and deformation, such as the junction between the top opening of the housing 123 and the end cap 122. The first section 12's greater pressure-bearing capacity effectively prevents further deformation and expansion of the battery cell 121. The second section 13 can be attached to areas of the battery cell 121 that are less susceptible to expansion and deformation, such as the middle and bottom areas of the housing 123. By attaching the second section 13 to the surface of the battery cell 121, it provides uniform support and cooling, ultimately effectively preventing cracks in the housing 123 of the battery cell 121.

[0067] In some possible embodiments, referring to FIG. 1 to FIG. 5 , the plate body 10 includes a first section 12 and a second section 13 sequentially connected along its length direction, and the first section 12 is closer to the end of the plate body 10 along the length direction than the second section 13 .

[0068] The support part includes multiple first support parts 20 and multiple second support parts 30; all first support parts 20 are supported between the inner walls on both sides of the heat exchange chamber 11 corresponding to the first section 12; all second support parts 30 are supported between the inner walls on both sides of the heat exchange chamber 11 corresponding to the second section 13; the pressure bearing capacity of the first section 12 is greater than the pressure bearing capacity of the second section 13.

[0069] By designing the different sections of the plate 10 and ensuring that the pressure-bearing capacity of the first section 12 is greater than that of the second section 13, the thermal management component 400 can adapt to the expansion requirements of different locations of the battery cell 121. The first section 12 is intended to be attached to the larger side surface of the battery cell near the end. The junction between the top opening of the housing 123 and the end cap 122 expands due to the increased volume of the electrode assembly 124 and abuts against the first section 12. The greater pressure-bearing capacity of the first section 12 effectively restrains the top opening of the housing 123 and the end cap 122, preventing further deformation and expansion. Since the middle and bottom areas of the housing 123 are closed, the volume expansion of the electrode assembly 124 during charge and discharge cycles has less impact on these areas. The second section 13 can be attached to the larger side surface of the battery cell, providing uniform support and cooling, ultimately effectively preventing cracking of the housing 123 of the battery cell 121.

[0070] In some embodiments, the first support portion 20 and the second support portion 30 can be made of a high-thermal-conductivity aluminum alloy, such as AA6061 or AA7075, to ensure that the first support portion 20 can transfer heat in a timely manner and ensure a good cooling effect for the thermal management component 400. The first support portion 20 and the second support portion 30 can also be made of other alloy materials, such as copper alloy, stainless steel alloy, etc., which are not limited in this application.

[0071] In some embodiments, the edge area of ​​the thermal management component 400 may be provided with a material with relatively high rigidity, such as a stainless steel alloy, to meet the expansion requirements of different positions of the battery cell 121 .

[0072] In some embodiments, the thermal management component 400 can be co-extruded with plastic and metal in the cavity at the contact position of the shell 123 of the battery cell 121, and can cooperate with the current collector to adjust the flow and pressure drop at different positions to meet the expansion requirements of the battery cell.

[0073] In some embodiments, the maximum pressure bearing capacity of the first section 12 can be designed to be 10-15 Newtons per square centimeter (N / cm2); the maximum pressure bearing capacity of the first section 12 can be 6-10 N / cm2.

[0074] It should be emphasized that the pressure-bearing capacity of the thermal management component 400 of the present application means that if the pressure-bearing force per unit area is lower than the maximum value of the pressure-bearing capacity, the thermal management component 400 will not be significantly deformed. In this way, it can always adhere to the electrical surface to provide uniform cooling.

[0075] In some possible embodiments, referring to FIG. 4 and FIG. 5 , an angle A is formed between the first support portion 20 and the inner wall of the first section 12 , an angle B is formed between the second support portion 30 and the inner wall of the second section 13 , and B<A is satisfied.

[0076] Specifically, the angle A between the first support portion 20 and the inner wall of the first section 12 and the angle B between the second support portion 30 and the inner wall of the second section 13 satisfy the following numerical relationship: 25 degrees (°) ≤ B < A ≤ 90 degrees (°).

[0077] By utilizing the difference in angles, the larger angle enables the first support portion 20 to bear force better, so that the pressure-bearing capacity of the first section 12 is greater than the pressure-bearing capacity of the second section 13, so that the thermal management component 400 provides uniform support and cooling effect to the battery cell 121, preventing the shell 123 of the battery cell 121 from cracking.

[0078] In some possible embodiments, referring to Figures 4 and 5, multiple first support portions 20 are supported on both sides of the inner walls of the first section 12 at intervals along the length direction of the plate body 10; the spacing between two adjacent first support portions 20 is C, 3 mm ≤ C ≤ 25 mm; preferably, the spacing C between two adjacent first support portions 20 can be 4 mm-20 mm. Multiple second support parts 30 are supported between the inner walls of the second section 13 at intervals along the length direction of the plate body 10; the distance between two adjacent second support parts 30 is D, and satisfies 3mm≤C<D≤25mm; preferably, the distance D between two adjacent second support parts 30 can be 20mm-25mm; utilizing the difference in spacing, the smaller spacing makes the first support part 20 denser, so that it can better bear the force, so that the pressure bearing capacity of the first section 12 is greater than the pressure bearing capacity of the second section 13, so that the thermal management component 400 provides uniform support and cooling effect to the battery cell 121, preventing the shell 123 of the battery cell 121 from cracking.

[0079] In some possible embodiments, referring to Figures 4 and 5, the first support portion 20 and the second support portion 30 are both support ribs, and the minimum rib thickness of the first support portion 20 is E, 0.1mm≤E≤3mm; preferably, the thickness E of the first support portion 20 can be 0.1mm-2mm; the minimum rib thickness of the second support portion 30 is F, and F<E; preferably, the thickness F of the second support portion 30 can generally be 0.08mm-1mm; utilizing the difference in hardness of the support ribs themselves, the thicker first support portion 20 can better bear the force, so that the pressure bearing capacity of the first section 12 is greater than the pressure bearing capacity of the second section 13, so that the thermal management component 400 provides uniform support and cooling effect to the battery cell 121, thereby preventing the shell 123 of the battery cell 121 from cracking.

[0080] In some possible embodiments, as shown in Figures 4 and 5 , a radius R1 is used to transition between the first support portion 20 and the inner walls of the first section 12, with a range of 0.2mm ≤ R1 ≤ 2mm. Preferably, the radius R1 between the first support portion 20 and the inner walls of the first section 12 can be 0.3mm-1.5mm. A radius R2 is used to transition between the second support portion 30 and the inner walls of the second section 13, with R1 ≥ R2. Preferably, the radius R2 between the second support portion 30 and the inner walls of the second section 13 can be 0.1-0.3mm. A larger radius increases the amount of material at the junction between the support rib and the inner wall, reducing stress and increasing connection strength. The larger radius allows the first support portion 20 to better withstand stress, thereby increasing the pressure-bearing capacity of the first section 12 relative to that of the second section 13. This allows the thermal management component 400 to provide uniform support and cooling for the battery cells 121, preventing cracking in the housing 123 of the battery cells 121.

[0081] In some possible embodiments, as shown in Figures 4 and 5 , the minimum inner wall thickness of the first section 12 is G, with 0.1mm≤G≤3mm. Preferably, the side wall thickness G of the first section 12 is 0.1mm-2mm. The minimum inner wall thickness of the second section 13 is H, with H<G. The side wall thickness H of the first section 12 can be 0.08-1.5mm. Using thicker materials improves the pressure-bearing capacity of the side walls of the thermal management component 400, thereby increasing the pressure-bearing capacity of the first section 12 to be greater than that of the second section 13. This allows the thermal management component 400 to provide uniform support and cooling for the battery cells 121, preventing cracking in the housings 123 of the battery cells 121.

[0082] The edge area of ​​the thermal management component 400 may be provided with a material with relatively high rigidity, such as aluminum alloy, to meet the expansion requirements of different positions of the battery cell 121 .

[0083] A second aspect of the present application provides a battery 100. Referring to Figures 1 to 5, the battery 100 includes a battery cell 121 and a thermal management component 400; the second section 13 is used for thermally connecting to the middle of the large surface of the battery cell 121, and the first section 12 is used for thermally connecting to the area near the edge of the large surface of the battery cell 121.

[0084] A third aspect of the present application provides an electrical device comprising the aforementioned battery 100, which is configured to provide electrical energy to the electrical device. By utilizing the battery 100 including the thermal management component 400, the design requirements of the electrical device can be effectively met, ensuring stability and consistency during expansion of the battery cells 121, thereby improving the lifespan and performance of the electrical device.

[0085] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A thermal management component, wherein: include: A plate body (10) is provided with a heat exchange cavity (11) for circulating a heat exchange medium, and a plurality of support portions are arranged at intervals in the heat exchange cavity (11) along the length direction of the plate body (10), and the heat exchange cavity (11) comprises a pair of inner walls arranged opposite to each other along the thickness direction, and the ends of the support portions are intersected and connected with at least one inner wall of the heat exchange cavity (11) at an acute angle.

2. The thermal management component according to claim 1, wherein: The plate body (10) comprises a first section (12) and a second section (13) which are sequentially connected along the length direction thereof, wherein the first section (12) is closer to an end of the plate body (10) along the length direction than the second section (13); When the first section (12) and the second section (13) are subjected to the same force, the deformation of the second section (13) is greater than that of the first section (12).

3. The thermal management component according to claim 1 or 2, wherein: The plate body (10) comprises a first section (12) and a second section (13) which are sequentially connected along the length direction thereof, wherein the first section (12) is closer to an end of the plate body (10) along the length direction than the second section (13); The support portion comprises a plurality of first support portions (20) and a plurality of second support portions (30), wherein the first support portions (20) are supported between two side inner walls corresponding to the first section (12) in the heat exchange chamber (11), and the second support portions (30) are supported between two side inner walls corresponding to the second section (13) in the heat exchange chamber (11).

4. The thermal management component according to claim 3, wherein: An angle A is formed between the first support portion (20) and the inner wall of the first section (12), an angle B is formed between the second support portion (30) and the inner wall of the second section (13), and B<A is satisfied.

5. The thermal management component according to claim 4, wherein: 25°≤B<A≤90°.

6. The thermal management component according to any one of claims 3 to 5, wherein: A plurality of first support portions (20) are supported at intervals along the length direction of the plate body (10) within the inner walls on both sides of the first section (12); the distance between two adjacent first support portions (20) is C; a plurality of second support portions (30) are supported at intervals along the length direction of the plate body (10) between the inner walls on both sides of the second section (13); the distance between two adjacent second support portions (30) is D, and C<D is satisfied.

7. The thermal management component according to claim 6, wherein: 3mm≤C<D≤25mm.

8. The thermal management component according to any one of claims 3 to 6, wherein: The first support portion (20) and the second support portion (30) are both support ribs, the minimum rib thickness of the first support portion (20) is E, the minimum rib thickness of the second support portion (30) is F, and F<E is satisfied.

9. The thermal management component according to any one of claims 3 to 6, wherein: A rounded corner R1 is used for transition between the first support portion (20) and the inner walls on both sides of the first section (12); A rounded corner R2 is used for transition between the second support portion (30) and the inner walls on both sides of the second section (13), satisfying R1≥R2.

10. The thermal management component according to any one of claims 2 to 6, wherein: The inner wall stiffness of the first section (12) is greater than the inner wall stiffness of the second section (13).

11. The thermal management component according to claim 10, wherein: The minimum wall thickness of the inner wall of the first section (12) is G; the minimum wall thickness of the inner wall of the second section (13) is H, and H<G is satisfied.

12. A battery, wherein: comprising a battery cell and a thermal management component as claimed in any one of claims 2 to 11; The second section (13) is used for heat-conducting connection to the middle of the large surface of the battery cell, and the first section (12) is used for heat-conducting connection to the area close to the edge of the large surface of the battery cell.

13. An electrical device, wherein: Comprising the battery of claim 12, the battery being used to provide electrical energy.

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