Thermal management assembly, battery and electric device

Abstract

The utility model relates to a heat management assembly, a battery and a power utilization device, and the heat management assembly comprises a current collection part which is internally provided with a current collection flow channel for a heat exchange medium to flow; a heat exchange member; the heat exchange piece comprises a heat exchange part and a connecting part, the heat exchange part is used for carrying out heat exchange with a battery monomer, a heat exchange flow channel for a heat exchange medium to flow is formed in the heat exchange part, and the connecting part is used for being connected with the current collecting piece so that the current collecting flow channel can be communicated with the heat exchange flow channel; and the wall thickness of the connecting part is greater than that of the heat exchange part. The thermal management assembly, the battery and the electric device provided by the embodiment of the utility model have the advantage of good assembly quality.

Description

Technical Field

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

[0002] With the extensive development of new energy technologies, batteries have been widely used. Usually, batteries will emit heat during use, and a cooling system is required to ensure that the battery works at a suitable ambient temperature, thereby extending the battery life and charging and discharging efficiency.

[0003] Currently, the heat exchange solution of using heat exchange components to cool down the battery has gradually become the mainstream battery thermal management solution. However, the current thermal management components have a high assembly failure rate and increased production costs. Summary of the invention

[0004] Based on this, it is necessary to provide a thermal management component, a battery and an electrical device to address the problem of high assembly defect rate.

[0005] The first aspect of the present application provides a thermal management component, comprising: a current collecting member, in which a current collecting channel for a heat exchange medium to flow is formed; a heat exchange member; the heat exchange member comprises a heat exchange portion and a connecting portion, the heat exchange portion is used to exchange heat with a battery cell, a heat exchange channel for a heat exchange medium to flow is formed inside the heat exchange portion, and the connecting portion is used to connect with the current collecting member so that the current collecting channel is connected to the heat exchange channel; the wall thickness of the connecting portion is greater than the wall thickness of the heat exchange portion.

[0006] By setting a heat exchanger and a current collecting part, the heat exchanger includes an integrally connected connecting part and a heat exchange part. The current collecting part is used to connect an external pipeline to input or output a heat exchange medium. The wall thickness of the heat exchange part is designed to be relatively thin, so that the heat exchange efficiency provided by the heat exchange part to the battery cell is high, and by designing the wall thickness of the connecting part to be relatively thick, the rigidity of the connecting part is improved and it will not be easily deformed. Therefore, the designer can use a larger interference fit to connect the current collecting part and the connecting part, so that the fixing strength of the two is greatly improved, the occurrence of gaps is reduced, and the quality of subsequent welding and assembly of the current collecting part and the connecting part is ensured, and the assembly quality is good; in addition, since the interference fit is designed to be larger, the requirements for the dimensional tolerance of the current collecting part and the connecting part are also reduced from another aspect, thereby reducing the process difficulty and production cost.

[0007] In one of the embodiments, the heat exchange element has a plurality of support plates disposed at intervals therein, so as to form a plurality of heat exchange channels separated from each other in the internal space of the heat exchange element.

[0008] In this way, it is convenient for the heat exchange medium to enter different heat exchange channels respectively and flow along a predetermined trajectory, thereby improving the heat exchange efficiency.

[0009] In one embodiment, the support plate includes a first plate body and a second plate body that are integrally connected, the first plate body is correspondingly arranged at the connecting portion, and the second plate body is correspondingly arranged at the heat exchange portion; the thickness of the first plate body is greater than the thickness of the second plate body.

[0010] By setting the thickness of the first plate body to be greater than that of the second plate body, the first plate body is supported in the connecting part, which can provide greater supporting force, thereby improving the rigidity of the connecting part and preventing it from deforming easily. Therefore, the designer can use a larger interference fit to connect the current collector and the connecting part, which greatly improves the fixing strength of the two, reduces the occurrence of gaps, ensures the quality of subsequent welding and assembly of the current collector and the connecting part, and has good assembly quality; and the relatively thin second plate body is supported in the heat exchange part to ensure that the heat exchange efficiency is not affected by the excessive thickness of the second plate body, and ensures that the heat exchange part provides uniform cooling and heat dissipation to the battery cells.

[0011] In one embodiment, the wall thickness of the connecting portion is A, 5mm≤A≤10mm; and / or the wall thickness of the heat exchange portion is B, 1mm≤B≤6mm.

[0012] In one of the embodiments, the heat exchange component further includes a flow-disturbing structure, and the flow-disturbing structure is disposed in the heat exchange flow channel.

[0013] By setting a spoiler structure in one, multiple or all heat exchange channels, the flow rate of the heat exchange medium in the heat exchange channel can be adjusted. In addition, the spoiler structure can increase the heat exchange area of ​​the heat exchange medium in the heat exchange channel and improve the heat exchange coefficient, thereby ensuring that the heat exchange efficiency provided by the heat exchange part to the battery cell is high.

[0014] In one embodiment, a plurality of the flow-disturbing structures are arranged in the heat exchange channel at intervals along the length direction of the heat exchange element.

[0015] In this way, the turbulent structure can control the resistance of the heat exchange medium flowing through the heat exchange channel and turbulent the heat exchange medium, thereby increasing the residence time of the heat exchange medium, so that the part of the heat exchange medium that has been heat exchanged near the surface and the part of the heat exchange medium that has not been heat exchanged in the middle are mixed with each other, thereby fully improving the heat exchange effect.

[0016] In one of the embodiments, the spoiler structure includes one or more of a groove, a convex point, a convex rib and a baffle.

[0017] In one of the embodiments, the current collecting part includes a connecting tube and a cover body with an opening on one side, and the opening of the cover body is sleeved on the connecting part; the connecting tube passes through the side wall of the cover body, and the current collecting part also includes a blocking part arranged in the cover body; when the opening of the cover body is sleeved on the connecting part, the blocking part and the connecting part abut against each other.

[0018] By making the blocking portion contact the end face of the connecting portion away from the heat exchange portion, a limit is formed on the insertion distance between the cover body and the connecting portion to prevent cracking caused by excessive insertion. The welding area between the current collecting part and the connecting portion can also be guaranteed by controlling the insertion depth to ensure stable welding quality.

[0019] A second aspect of the present application provides a battery, comprising a battery cell and the above-mentioned thermal management component, wherein the battery cell is placed on the heat exchange portion.

[0020] A third aspect of the present application provides an electrical device, comprising the above-mentioned battery.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0023] Figure 2 Schematic diagram of the exploded structure of a battery provided for some embodiments of the present application.

[0024] Figure 3 A schematic diagram of the structure of a battery module provided in some embodiments of the present application.

[0025] Figure 4 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application.

[0026] Figure 5 A schematic diagram of the structure of a thermal management assembly provided in some embodiments of the present application, wherein one end of the heat exchange member and the current collecting member are in an unassembled state.

[0027] Figure 6 This is a schematic diagram of the structure of a heat exchange component provided in some embodiments of the present application, wherein a dotted line is used to indicate a boundary line between a connecting portion and a heat exchange portion.

[0028] Figure 7 A schematic diagram of the structure of a heat exchange component provided in some embodiments of the present application.

[0029] Figure 8 for Figure 7 EE cross-sectional view of the partial structure shown.

[0030] Fig. 9 for Figure 8 Magnified view of region F of the structure shown.

[0031] Fig.10 A schematic diagram of the structure of a current collecting member provided in some embodiments of the present application.

[0032] Fig.11 Schematic diagram of the assembly of thermal management components and battery cells provided in some embodiments of the present application.

[0033] Description of reference numerals:

[0034] Vehicles - 1000;

[0035] Battery 100, housing 110, battery module 120, battery cell 121, end cap 122, housing 123, electrode assembly 124, electrode terminal 125, controller 200, motor 300;

[0036] Thermal management components - 400;

[0037] Heat exchange component-10, connecting part-11, heat exchange part-12, heat exchange flow channel-13, flow channel opening-14, support plate-15, first plate body-15a, second plate body-15b, current collecting component-20, connecting pipe-21, cover body-22, blocking part-23, spoiler structure-30. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" 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.

[0040] In the description of the embodiments of the present application, if the technical terms "first", "second", etc. 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.

[0041] Reference to "embodiments" herein 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 herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise clearly and specifically defined. Similarly, if the term "multiple groups" appears, "multiple groups" refers to more than two groups (including two groups), and if the term "multiple sheets" appears, "multiple sheets" refers to more than two sheets (including two sheets).

[0044] 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 referred device or element 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.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if the technical terms "installed", "connected", "connected", "fixed" and the like 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.

[0046] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it 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. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] 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 a central 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 a central element at the same time. 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 implementation method.

[0048] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0049] Generally, batteries emit heat during use, and a cooling system is required to ensure that the batteries operate at a suitable ambient temperature, thereby extending the battery life and charging and discharging efficiency. Specifically, a heat exchange solution of laying heat exchange components is mainly adopted in battery cells. The heat of the battery cells is transferred to the heat exchange medium through the heat exchange components, and the heat exchange medium takes away the heat to achieve the purpose of cooling the battery.

[0050] However, the current heat exchanger often needs to consider the heat exchange efficiency when designing the size. Low heat exchange efficiency will cause the heat of the battery cell to not be transferred to the heat exchange medium through the heat exchanger in time. Among them, in addition to the thermal conductivity of the material of the heat exchanger, the wall thickness of the heat exchanger also directly affects the heat exchange efficiency. Therefore, the designer will reduce the wall thickness of the heat exchanger as much as possible to improve the heat exchange efficiency of the heat exchanger. The end of the heat exchanger and the current collector are preliminarily assembled by interference insertion and then welded and fixed. However, the wall thickness of the end of the heat exchanger is too small and the overall rigidity is insufficient, so a higher interference cannot be designed; once the size of the current collector and the end of the heat exchanger deviates, the original interference assembly will become a gap assembly, which will cause the two to be unable to be welded and fixed, or abnormal conditions such as cold welding will occur due to excessive gaps; and if the size of the current collector and the end of the heat exchanger is controlled with high precision, it will increase the processing difficulty and production cost in disguise.

[0051] Taking into account that the end of the heat exchanger is often assembled with the current collecting member, and does not directly contact the battery cell for heat dissipation, the wall thickness of the end of the heat exchanger can be appropriately increased to ensure the rigidity of the end of the heat exchanger. Accordingly, the interference fit size between the end of the heat exchanger and the current collecting member can be further increased, thereby increasing the interference fit between the two, avoiding gaps, and ensuring the quality of subsequent welding assembly. In addition, the dimensional tolerance of the end of the heat exchanger and the dimensional tolerance of the current collecting member can be appropriately relaxed, thereby reducing the difficulty of the production process and the production cost.

[0052] The embodiments of the present application provide a thermal management component, a battery, and an electric device, which may be, but not limited to, electric toys, electric tools, battery vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0053] 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 a box 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.

[0054] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and 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.

[0055] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0056] Figure 2 An exploded view of a battery 100 provided for some embodiments of the present application; Figure 3 This is a schematic diagram of the structure of the battery module provided in some embodiments of the present application. Figure 2 and Figure 3 In order to meet different power requirements, the battery 100 may include a plurality of battery cells 121 and a housing 110. The battery cell 121 refers to the smallest unit that constitutes the battery module 120 or the battery pack. The plurality of battery cells 121 may be connected in series and / or in parallel via electrode terminals for use in various applications. The battery 100 mentioned in the present application is a battery pack. A heat exchange element (not shown in the figure) may be provided between two surfaces of two battery cells 121 that are arranged opposite to each other. Specifically, a heat exchange element may be provided between two large surfaces or between two side surfaces to cool the battery cell 121; a heat exchange element may also be provided directly on a large surface of a battery cell 121 for cooling.

[0057] The box body 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 .

[0058] The box 110 can adopt a variety of structures. In some embodiments, the box 110 can include a first part 111 and a second part 112, the first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a storage space for accommodating the battery cell 121. The second part 112 can be a hollow structure with one end open, and the first part 111 can be a plate-like structure. The first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 can also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box 110 formed by the first part 111 and the second part 112 can be in a variety of shapes, such as a simple three-dimensional structure such as a single cuboid or a cylinder or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as a cuboid or a cylinder or a sphere, and the embodiments of the present application are not limited to this. 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, etc., or a composite material such as glass fiber and epoxy resin, and the implementation mode of the present application is not limited to this.

[0059] In the embodiment of the present application, multiple battery cells 121 can directly form a battery pack, or they can first form a battery module 120, and then the battery module 120 can form a battery pack. Specifically, multiple battery cells 121 can be directly connected in series, parallel or mixed together to form a whole, and then the whole formed by multiple battery cells 121 is accommodated in the box 110. Alternatively, multiple battery cells 121 can first be connected in series, parallel or mixed together to form a battery module 120, and then multiple battery modules 120 can be connected in series, parallel or mixed together to form a whole, and then accommodated in the box 110.

[0060] 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 .

[0061] 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 it is not limited thereto. The battery cell 121 can be cylindrical, flat, rectangular or other shapes. The battery cells 121 are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the implementation method of the present application is not limited to this. However, for the sake of simplicity, the following embodiments are all described by taking the square lithium-ion battery cell 121 as an example.

[0062] Please refer to Figure 4 , Figure 4The schematic diagram of the exploded structure of the 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.

[0063] The end cap 122 refers to a component that covers the opening of the shell 123 to isolate the internal environment of the electrode assembly 124 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the shell 123 to match the shell 123. Optionally, the end cap 122 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 122 is not easily deformed when it is squeezed and collided, so that the battery cell 121 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 125 can be provided on the end cap 122. The electrode terminal 125 can be used to electrically connect to the electrode assembly 124 for outputting or inputting electrical energy of the battery cell 121. In some embodiments, the end cap 122 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 121 reaches a threshold. The material of the end cap 122 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. 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. For example, the insulating member may be plastic, rubber, or the like.

[0064] The shell 123 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell 121, wherein the formed internal environment can be used to accommodate the electrode assembly 124, the electrolyte and other components. The shell 123 and the end cap 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 cap 122 at the opening. Without limitation, the end cap 122 and the shell 123 can also be integrated. Specifically, the end cap 122 and the shell 123 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 123, the end cap 122 covers the shell 123. 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 shell 123 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0065] The electrode assembly 124 is a component in the battery cell 121 where an electrochemical reaction occurs. One or more electrode assemblies 124 may be contained in the housing 123. The electrode assembly 124 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 124, and the parts of the positive and negative electrode sheets without active materials each constitute a pole ear (not shown). The positive pole ear and the negative pole ear 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 active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal 125 to form a current loop.

[0066] A first aspect of the present application provides a thermal management component 400 for carrying a battery cell 121 and providing cooling and heat dissipation functions to ensure that the battery operates at a suitable ambient temperature, thereby extending the battery's service life and charging and discharging efficiency.

[0067] See also Figure 5 , Figure 6 as well as Fig.11 As shown, Figure 5 as well as Figure 6 A schematic diagram of the structure of a thermal management component 400 provided in some embodiments of the present application, Fig.11 Schematic diagram of the assembly of the thermal management component 400 and the battery cell 121 provided in some embodiments of the present application.

[0068] The thermal management assembly 400 includes a heat exchange component 10 and a current collecting component 20 .

[0069] The heat exchange component 10 includes a connecting portion 11 and a heat exchange portion 12. The heat exchange portion 12 is the main structure for supporting the battery cell 121 and is used for heat exchange with the battery cell 121. Generally, the heat exchange portion 12 may be a hollow plate structure, and a heat exchange channel 13 for the flow of heat exchange medium is formed inside the heat exchange portion 12. The heat exchange medium flows in or out from both ends of the heat exchange portion 12 along the length direction, and the battery cell 121 is placed on one side of the plate surface of the heat exchange portion 12 along the thickness direction. In this way, heat exchange is achieved with the battery cell 121 through the plate surface of the heat exchange portion 12.

[0070] The heat exchange medium can be water, alcohol coolant or glycerin coolant. In this way, the heat exchange medium can effectively absorb the heat transferred from the surface of the heat exchange part 12 during the flow in the heat exchange channel 13 to achieve heat dissipation.

[0071] The connection part 11 is integrally connected to at least one end of the heat exchange part 12 along the length direction, and the heat exchange flow channel 13 extends from the heat exchange part 12 to the connection part 11, and a flow channel opening 14 is formed on the end surface of the connection part 11 away from the heat exchange part 12. The two ends of the heat exchange part 12 in the length direction can be distributed and connected to each other with a connection part 11, or only one end of the heat exchange part 12 in the length direction can be connected to the connection part 11, which is subject to the design.

[0072] The current collector 20 is used to connect external pipelines to input or output heat exchange medium. A current collecting channel (not marked) for the heat exchange medium to flow is formed inside the current collector 20, and the connecting portion 11 is used to connect with the current collector 20 so that the current collecting channel is connected to the heat exchange channel 13. Specifically, the current collector 20 is matched with the connecting portion 11 and is connected with the heat exchange channel 13, wherein the current collector 20 can be interference fit on the connecting portion 11; one end of the connecting portion 11 along the length direction is connected to the heat exchange portion 12, and the other end is inserted into the current collector 20, and the area where the current collector 20 and the connecting portion 11 are sleeved is usually not used to place the battery cell 121; in this way, the heat exchange medium enters the heat exchange portion 12 of the heat exchange member 10 through the flow channel opening 14 connected to the current collector 20, so that the heat exchange portion 12 of the heat exchange member 10 can provide cooling and heat dissipation for the battery cell 121 to ensure that the battery operates at a suitable ambient temperature.

[0073] The wall thickness of the connecting portion 11 is greater than the wall thickness of the heat exchange portion 12. Usually, the wall thickness of the connecting portion 11 can be A, 5mm≤A≤10mm; the wall thickness of the heat exchange portion 12 can be B, 1mm≤B≤6mm. In this way, by designing the wall thickness of the heat exchange portion 12 to be relatively thin, the heat exchange efficiency provided by the heat exchange portion 12 to the battery cell 121 is high, and by designing the wall thickness of the connecting portion 11 to be relatively thick, the rigidity of the connecting portion 11 is improved and it will not be easily deformed. Then, the designer can use a larger interference fit to connect the current collector 20 and the connecting portion 11, so that the fixing strength of the two is greatly improved, the occurrence of gaps is reduced, and the quality of subsequent welding and assembly of the current collector 20 and the connecting portion 11 is ensured, and the assembly quality is good; in addition, since the interference fit is designed to be larger, the requirements for the dimensional tolerance of the current collector 20 and the connecting portion 11 are also reduced from another aspect, thereby reducing the process difficulty and production cost.

[0074] It should be noted that the connecting portion 11 and the heat exchange portion 12 are both hollow tube shell structures, both of which have surrounding side walls, and the enclosed space inside is a part of the heat exchange flow channel 13 .

[0075] Optionally, the heat exchange element 10 is a harmonica tube cooling plate, a profile liquid cooling plate or a stamping liquid cooling plate.

[0076] Optionally, the connecting part 11 and the heat exchange part 12 can be an aluminum alloy tube shell, which has good strength, light weight and good thermal conductivity. In addition, the connecting part 11 and the heat exchange part 12 can also be a plastic tube shell, which is subject to the design.

[0077] Optionally, the cross-section of the connecting part 11 and the heat exchange part 12 is a flat plate structure, and the heat exchange part 12 has two relatively large surfaces (not marked) with a large area, and a side surface (not marked) connecting the two large surfaces. The large surface of the heat exchanger 10 is usually a horizontal plate surface or a nearly horizontal curved surface. One side of the large surface of the heat exchanger 12 can be used to bear the battery cell 121, and the side surface can be a curved surface to improve the overall rigidity. The shape of the opening cross section of the current collector 20 should be compatible with the connecting part 11 to ensure that the two can be plugged in with interference.

[0078] Optionally, see Figure 5 as well as Figure 6 As shown, the heat exchange element 10 includes connecting parts 11 located at both ends and a heat exchange part 12 located in the middle; a heat exchange flow channel 13 extends from the heat exchange part 12 to both ends to the connecting part 11 to form a flow channel opening 14.

[0079] Combination Figure 5 In the orientation shown, one current collector 20 is connected to the left connection part 11 as the input end of the cold medium, and the other current collector 20 is connected to the right connection part 11 as the outflow end of the cold medium (already assembled together by interference fit in the figure); the cold medium flows in from the left current collector 20, and enters into the heat exchange flow channel 13 through the flow channel opening 14 on the left connection part 11, and the heat exchange medium can flow in a straight line from left to right along the heat exchange flow channel 13 in the heat exchange part 12, or flow in an S-shaped meandering manner, so that the heat exchange part 12 of the heat exchange part 10 can provide cooling and heat dissipation for the battery cell 121, so as to ensure that the battery works at a suitable ambient temperature, which is subject to the design; the heat exchange medium after heat exchange flows out from the flow channel opening 14 on the right connection part 11 to the left current collector 20, and then flows back to the external pipeline, so as to realize the recycling of the heat exchange medium.

[0080] In some embodiments, see Figures 5 to 9 As shown, Figure 7 A schematic diagram of the structure of a heat exchanger provided in some embodiments of the present application, Figure 8 for Figure 7 EE cross-sectional view of the partial structure shown, Fig. 9 for Figure 8 The heat exchanger 10 has a plurality of support plates 15 arranged at intervals inside to form a plurality of heat exchange channels 13 separated from each other in the internal space of the heat exchanger 10.

[0081] All reinforcing plates 15 are arranged at intervals in the heat exchange portion 12 and extend along the length direction of the heat exchange element 10 to the connecting portion 11. The support plates 15 form the internal space of the heat exchange element 10 into a plurality of mutually separated heat exchange channels 13. In this way, it is convenient for the heat exchange medium to enter different heat exchange channels 13 respectively and flow along a predetermined trajectory, thereby improving the heat exchange efficiency.

[0082] Optionally, the support plate 15, the connecting portion 11 and the heat exchange portion 12 are integrally connected, and the three can be processed at one time by injection molding, stamping or the like, which has a simple process and low cost.

[0083] Optionally, the support plate 15 may be an aluminum alloy plate or a plastic plate.

[0084] In some embodiments, see Figures 5 to 9 As shown, the support plate 15 includes a first plate body 15a and a second plate body 15b that are integrally connected; the first plate body 15a is correspondingly arranged at the connecting portion 11, and the second plate body 15b is correspondingly arranged at the heat exchange portion 12; specifically, the first plate body 15a is supported between the opposite side walls of the connecting portion 11, and the second plate body 15b is supported between the opposite side walls of the heat exchange portion 12.

[0085] The thickness of the first plate 15a is greater than that of the second plate 15b. The thickness of the first plate 15a is C, 3mm≤C≤8mm; the thickness of the second plate 15b is D, 0.5mm≤D≤3mm, which is subject to the design. By setting the thickness of the first plate 15a to be greater than that of the second plate 15b, the first plate 15a is supported in the connecting portion 11, which can provide greater support force, so that the rigidity of the connecting portion 11 is improved and it will not be easily deformed. Then, the designer can use a larger interference to connect the current collector 20 and the connecting portion 11, and the fixing strength of the two is greatly improved, reducing the occurrence of gaps, ensuring the quality of subsequent welding and assembly of the current collector 20 and the connecting portion 11, and the assembly quality is good; and the relatively thin second plate 15b is supported in the heat exchange portion 12 to ensure that the heat exchange efficiency is not affected by the excessive thickness of the second plate 15b, and to ensure that the heat exchange portion 12 provides uniform cooling and heat dissipation to the battery cell 121.

[0086] Optionally, a certain angle is usually set between the first plate body 15a and the side wall of the connecting portion 11, and between the second plate body 15b and the side wall of the heat exchange portion 12 to increase the heat exchange area.

[0087] In some embodiments, see Figures 5 to 9As shown, the thermal management component includes a spoiler structure 30, which is arranged in the heat exchange channel 13 to adjust the flow resistance of the heat exchange medium. The spoiler structure 30 is arranged in one, multiple or all of the heat exchange channels 13 to adjust the flow rate of the heat exchange medium in the heat exchange channel 13. In addition, the spoiler structure 30 can increase the heat exchange area of ​​the heat exchange medium in the heat exchange channel 13 and improve the heat exchange coefficient, thereby ensuring that the heat exchange efficiency provided by the heat exchange part 12 to the battery cell 121 is high.

[0088] The spoiler structure 30 can have many embodiments in the heat exchange channel 13 .

[0089] Among them, multiple spoiler structures 30 can be arranged in the heat exchange channel 13 at intervals along the length direction of the heat exchange element 10. In this way, the spoiler structure 30 can control the resistance of the heat exchange medium flowing through the heat exchange channel 13 and turbulent the heat exchange medium, thereby increasing the retention time of the heat exchange medium, so that the part of the heat exchange medium that has been heat exchanged near the surface and the part of the heat exchange medium that has not been heat exchanged in the middle are mixed with each other, fully improving the heat exchange effect. It should be emphasized that the spoiler structure 30 disrupts the laminar heat exchange medium to form turbulence, and then mixes it evenly; the spoiler structure 30 will not completely block the heat exchange medium from flowing along the heat exchange channel 13.

[0090] Optionally, see Figure 7 and Figure 8 As shown, the spoiler structure 30 includes one or more of grooves, convex points, convex ribs and baffles. By setting the spoiler structure 30, the flow resistance of the heat exchange medium can be adjusted, the flow time of the heat exchange medium in the heat exchange channel 13 can be extended, and the heat exchange effect can be improved.

[0091] In some embodiments, see Figure 5 , Figure 6 as well as Fig.10 As shown, Fig.10 The schematic diagram of the structure of the current collecting member provided in some embodiments of the present application; the current collecting member 20 includes a connecting pipe 21 and a cover body 22 with an opening on one side. The opening of the cover body 22 is sleeved on the connecting portion 11, and the connecting pipe 21 passes through the side wall of the cover body 22.

[0092] The cover body 22 is usually made of plastic or aluminum alloy. The cross-sectional shape of the opening of the cover body 22 should be compatible with the cross-sectional shape of the connecting portion 11. The opening of the cover body 22 can be a flat slot, which is convenient for the connecting portion 11 to be inserted into the opening of the cover body 22. The connecting pipe 21 is usually a metal pipe joint, and is laterally inserted into the side wall of the cover body 22. The section of the connecting pipe 21 located inside the cover body 22 has a connecting flow channel (not marked), so as to communicate with the flow channel port 14. The section of the connecting pipe 21 located outside the cover body 22 is formed as a connecting port, which is used to communicate with the pipeline for circulating the heat exchange medium outside, and will not be repeated here.

[0093] In some possible embodiments, see Figure 5 , Figure 6 as well as Fig.10 As shown, the current collecting member 20 further includes a stopper 23 disposed in the cover body 22. When the opening of the cover body 22 is sleeved on the connecting portion 11, the stopper 23 can abut against the connecting portion 11.

[0094] By abutting the blocking portion 23 against the end face of the connecting portion 11 away from the heat exchange portion 12, a limit is formed on the insertion distance between the cover body 22 and the connecting portion 11 to prevent cracking caused by excessive insertion. The welding area of ​​the current collecting part 20 and the connecting portion 11 can also be guaranteed by controlling the insertion depth to ensure stable welding quality.

[0095] Optionally, the blocking portion 23 and the cover body 22 are formed by integral stamping or integral casting.

[0096] Optionally, the baffle is a bump or a step.

[0097] The second aspect of the present application provides a battery 100, including a battery cell 121 and the above-mentioned thermal management assembly 400. The battery cell is thermally connected to the heat exchange component 10. Generally, the battery cell 121 can be placed on the plate surface of the heat exchange part 12 to achieve cooling and heat dissipation.

[0098] A second aspect of the present application provides an electrical device, comprising the above-mentioned battery 100, and the battery 100 is used to provide electrical energy to the electrical device.

[0099] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0100] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A thermal management component, characterized in that: include: A flow collecting member (20) is formed with a flow collecting channel for the heat exchange medium to flow therein; A heat exchange component (10); the heat exchange component (10) comprises a heat exchange portion (12) and a connection portion (11); the heat exchange portion (12) is used to perform heat exchange with a battery cell; a heat exchange flow channel (13) for a heat exchange medium to flow is formed inside the heat exchange portion (12); the connection portion (11) is used to connect with the current collecting component (20) so that the current collecting flow channel is connected to the heat exchange flow channel (13); The wall thickness of the connecting portion (11) is greater than the wall thickness of the heat exchange portion (12).

2. The thermal management assembly according to claim 1, characterized in that The heat exchange element (10) has a plurality of support plates (15) arranged at intervals inside, so as to form a plurality of mutually separated heat exchange channels (13) in the internal space of the heat exchange element (10).

3. The thermal management assembly according to claim 2, characterized in that The support plate (15) comprises a first plate body (15a) and a second plate body (15b) which are integrally connected, the first plate body (15a) being arranged correspondingly on the connecting portion (11), and the second plate body (15b) being arranged correspondingly on the heat exchange portion (12); The thickness of the first plate body (15a) is greater than the thickness of the second plate body (15b).

4. The thermal management assembly according to any one of claims 1 to 3, characterized in that: The wall thickness of the connecting portion (11) is A, 5mm≤A≤10mm; And / or, the wall thickness of the heat exchange portion (12) is B, 1mm≤B≤6mm.

5. The thermal management assembly according to any one of claims 1 to 3, characterized in that: The heat exchange component further comprises a flow-disturbing structure (30), and the flow-disturbing structure (30) is arranged in the heat exchange flow channel (13).

6. The thermal management assembly according to claim 5, characterized in that A plurality of the flow-disturbing structures (30) are arranged in the heat exchange flow channel (13) at intervals along the length direction of the heat exchange element (10).

7. The thermal management assembly according to claim 5, characterized in that The spoiler structure (30) comprises one or more of a groove, a convex point, a convex rib and a baffle.

8. The thermal management assembly according to any one of claims 1 to 3, characterized in that: The current collecting member (20) comprises a connecting pipe (21) and a cover body (22) with an opening on one side, wherein the opening of the cover body (22) is sleeved on the connecting portion (11); the connecting pipe (21) passes through the side wall of the cover body (22), and the current collecting member (20) further comprises a blocking portion (23) arranged in the cover body (22); When the opening of the cover body (22) is sleeved on the connecting portion (11), the blocking portion (23) and the connecting portion (11) abut against each other.

9. A battery, characterized in that: It comprises a battery cell and a thermal management assembly as claimed in any one of claims 1 to 8, wherein the battery cell is thermally connected to the heat exchange element (10).

10. An electrical device, characterized in that: The battery as claimed in claim 9 is used to provide electrical energy to the electrical device.

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