Heat exchange assembly, battery and electric device

Abstract

The utility model relates to a heat exchange assembly, a battery and a power utilization device, and the heat exchange assembly comprises a heat exchange part which comprises a heat exchange flow channel with an inlet, the heat exchange flow channel contains a heat exchange medium, and the heat exchange flow channel comprises a first flowing section and a second flowing section in the flowing direction of the heat exchange medium, the first flowing section is closer to the inlet than the second flowing section, and the wall thickness, corresponding to the first flowing section, of the side wall of at least one side of the heat exchange piece is larger than the wall thickness, corresponding to the second flowing section, of the side wall of the heat exchange piece. The heat exchange assembly, the battery and the power utilization device provided by the embodiment of the utility model have the advantage of uniform heat exchange.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a heat exchange 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 heat exchange 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 technology of using heat exchange components to control battery temperature has gradually become the mainstream battery thermal management solution. However, the current heat exchange components have uneven heat exchange, which affects the battery usage experience. Summary of the invention

[0004] Based on this, it is necessary to provide a heat exchange component, a battery and an electrical device to address the problem of uneven heat exchange.

[0005] The first aspect of the present application provides a heat exchange component, comprising: a heat exchange element, comprising a heat exchange channel having an inlet, the heat exchange channel accommodating a heat exchange medium, along the flow direction of the heat exchange medium, the heat exchange channel comprising a first flow segment and a second flow segment, the first flow segment being closer to the inlet than the second flow segment, and the wall thickness of the side wall of at least one side of the heat exchange element corresponding to the first flow segment is greater than the wall thickness corresponding to the second flow segment.

[0006] A heat exchange channel with an inlet is provided, the heat exchange channel includes a first flow section and a second flow section, the first flow section is closer to the inlet than the second flow section, and the wall thickness of the side wall of at least one side of the heat exchange element corresponding to the first flow section is greater than the wall thickness of the side wall of the heat exchange element corresponding to the second flow section; in this way, the wall thickness of the side wall of at least one side of the heat exchange element corresponding to the first flow section adopts a relatively thick wall thickness A, thereby reducing the heat exchange efficiency there to a certain extent, and the heat exchange medium that has just flowed into the heat exchange channel from the inlet has a relatively good temperature quality, and even at a relatively low heat exchange efficiency, it can still exchange heat with the battery cell to keep it at a suitable temperature; the wall thickness of the side wall of at least one side of the heat exchange element corresponding to the second flow section adopts a relatively thick wall thickness A. The thin wall thickness B improves the heat exchange efficiency at this location to a certain extent. The heat exchange medium has been continuously flowing in the heat exchange channel and has exchanged heat to a certain extent. When the heat exchange medium with relatively poor temperature quality flows to the second flow section of the heat exchange channel, a higher heat exchange efficiency is obtained through the thinner side wall thickness, so that the heat exchange medium can still efficiently exchange heat with the battery cell to keep it at a suitable temperature; furthermore, during the process of flowing and exchanging heat in the entire heat exchange channel, the heat exchange medium can provide relatively good and uniform heat exchange efficiency to various positions of the battery cell, avoiding uneven heat exchange of the battery cell, thereby ensuring good performance of the battery cell and extending the service life of the battery cell.

[0007] In some possible embodiments, the heat exchange component includes a heat exchange side wall for heat-conducting connection to the battery cell, and the wall thickness of the heat exchange side wall corresponding to the first flow section is greater than the wall thickness corresponding to the second flow section.

[0008] In some possible embodiments, the heat exchange side wall gradually becomes thinner along the flow direction of the heat exchange medium.

[0009] In some possible embodiments, the heat exchange element includes a plurality of the heat exchange channels arranged side by side along the first direction, and ends of the plurality of heat exchange channels arranged side by side in the second direction are connected in series.

[0010] In some possible embodiments, one of the heat exchange channels is a first channel, and the other heat exchange channel is a second channel, the first channel is closer to the inlet than the second channel, the first channel has a first heat exchange side wall for thermally connecting to the battery cell, the second channel has a second heat exchange side wall for thermally connecting to the battery cell, and the wall thickness of the first heat exchange side wall is greater than the wall thickness of the second heat exchange side wall.

[0011] In some possible embodiments, the first flow channel includes the first flow segment and the second flow segment, and the wall thickness of the first heat exchange side wall corresponding to the first flow segment is greater than the wall thickness of the first heat exchange side wall corresponding to the second flow segment.

[0012] In some possible embodiments, the second flow channel includes a third flow segment and a fourth flow segment, and a wall thickness of the second heat exchange side wall corresponding to the third flow segment is greater than a wall thickness of the second heat exchange side wall corresponding to the fourth flow segment.

[0013] In some possible embodiments, one of the heat exchange channels is a third channel; the first channel, the second channel and the third channel are arranged side by side in sequence along the first direction, the heat exchange element includes a first end and a second end opposite to each other along the second direction, the first channel and the second channel are connected in series at the first end, and the second channel and the third channel are connected in series at the second end, the heat exchange element includes a heat exchange side wall on at least one side of the third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the wall thickness of the heat exchange side wall at a position corresponding to the first channel is greater than the wall thickness of the heat exchange side wall at a position corresponding to the second channel, and the wall thickness of the heat exchange side wall at a position corresponding to the second channel is greater than the wall thickness of the heat exchange side wall at a position corresponding to the third channel.

[0014] In some possible embodiments, the heat exchange assembly also includes two collecting parts, which are respectively connected to the first end and the second end of the heat exchanger; the collecting part includes a connecting pipe and a main body, and the main body includes a separated turning cavity and a connecting cavity, and the turning cavity is used to connect any two adjacent flow channels along the second direction among the first flow channel, the second flow channel and the third flow channel, and the connecting cavity connects the connecting pipe and the remaining flow channel.

[0015] In some possible embodiments, one of the current collecting parts is a first current collecting part, and the other current collecting part is a second current collecting part, the first current collecting part includes a first connecting tube, a first connecting cavity and a first turning cavity, and the second current collecting part includes a second connecting tube, a second connecting cavity and a second turning cavity; the first connecting cavity is used to connect the first connecting tube and the first flow channel, and the first turning cavity is used to connect the second flow channel and the third flow channel; the second connecting cavity is used to connect the third flow channel and the second connecting tube, and the second turning cavity is used to connect the first flow channel and the second flow channel.

[0016] A second aspect of the present application provides a battery, comprising a battery cell and the above-mentioned heat exchange component, wherein a side wall of at least one side of the heat exchange component is thermally connected to the battery cell.

[0017] In some possible embodiments, the battery cell includes a first surface, which is a side surface of the battery cell with the largest surface area, and a side wall of at least one side of the heat exchange element is thermally connected to the first surface.

[0018] The third aspect of the present application provides an electrical device, comprising the above-mentioned battery. .

[0019] 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

[0020] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0021] Figure 2 Schematic diagram of the exploded structure of a battery provided for some embodiments of the present application.

[0022] Figure 3 A schematic diagram of the structure of a battery module provided in some embodiments of the present application.

[0023] Figure 4 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application.

[0024] Figure 5 A schematic diagram of the structure of a heat exchange assembly provided in some embodiments of the present application.

[0025] Figure 6 A schematic diagram of the structure of a heat exchange component provided in some embodiments of the present application.

[0026] Figure 7 A front view of a heat exchange element provided in some embodiments of the present application.

[0027] Figure 8 for Figure 7 CC cross-sectional view of the structure shown.

[0028] Fig. 9 A schematic diagram of the structure of a current collecting component provided in some embodiments of the present application.

[0029] Fig.10 A schematic diagram of the flow of a heat exchange medium in a heat exchange assembly provided in some embodiments of the present application, wherein a single-line arrow represents the flow direction of the heat exchange medium.

[0030] Fig.11 Schematic diagram of the structure of the current collecting parts provided in other embodiments of the present application.

[0031] Fig.12 A schematic diagram of the flow of heat exchange medium in a heat exchange assembly provided for other embodiments of the present application, wherein a single-line arrow represents the flow direction of the heat exchange medium.

[0032] Fig.13Schematic diagram of the internal structure of the heat exchange assembly provided in other embodiments of the present application.

[0033] Fig.14 Schematic diagram of the assembly of heat exchange components and battery cells provided in some embodiments of the present application.

[0034] In each figure, the direction indicated by X is the second direction, the direction indicated by Y is the first direction, and the direction indicated by Z is the third direction.

[0035] Description of reference numerals:

[0036] Vehicles - 1000;

[0037] Battery 100, housing 110, battery module 120, battery cell 121, end cap 122, housing 123, electrode assembly 124, electrode terminal 125, first surface 126, controller 200, motor 300;

[0038] Heat exchange component-400;

[0039] Heat exchange element 10, first flow section 11, second flow section 12, heat exchange channel 13, support plate 15, heat exchange side wall 130, first flow channel 131, first heat exchange side wall 101, second flow channel 132, third flow section 1321, fourth flow section 1322, second heat exchange side wall 102, third flow channel 133, fifth flow section 1331, sixth flow section 1332, third heat exchange side wall 103;

[0040] Current collecting part-20, first current collecting part-201, second current collecting part-202, connecting tube-21, first connecting tube-211, second connecting tube-212, liquid inlet-21a, liquid outlet-21b, main body-22, blocking part-23, dividing part-24, connecting cavity-25, first connecting cavity-251, second connecting cavity-252, turning cavity-26, first turning cavity-261, second turning cavity-262, connecting hole-27. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. 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.

[0046] 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).

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Usually, batteries will emit heat during use, and a heat exchange system is needed to ensure that the batteries work at a suitable ambient temperature, thereby extending the battery life and charging and discharging efficiency. Specifically, the heat exchange solution of laying heat exchange components is mainly adopted in the 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.

[0053] However, current heat exchange components often need to consider heat exchange efficiency when designing their dimensions, so the wall thickness of the heat exchange components is generally designed to be uniform. As a result, when the heat exchange medium flows in the heat exchange component, the efficiency of heat exchange with the battery cell through the side wall of the heat exchange component is consistent; but as the heat exchange medium continues to flow in the flow channel to exchange heat, the temperature quality of the heat exchange medium gradually decreases. Therefore, when the battery cell is set on the same heat exchange component, different positions of the battery cell will produce temperature differences due to uneven heat exchange, ultimately affecting the performance of the battery cell.

[0054] 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 heat exchanger can be appropriately adjusted to ensure that when the heat exchange medium flows in the heat exchanger, there is a difference in the efficiency of heat exchange with the battery cell through the side wall of the heat exchanger; specifically, when the temperature quality of the heat exchange medium is good, the efficiency of heat exchange with the battery cell through the side wall of the heat exchanger is relatively low, and when the temperature quality of the heat exchange medium is poor, the efficiency of heat exchange with the battery cell through the side wall of the heat exchanger is relatively high. In this way, the battery cells can be arranged on the same heat exchanger, and the heat exchange at various positions of the battery cells is uniform, thereby ensuring good performance of the battery cells and extending the service life of the battery cells.

[0055] The embodiments of the present application provide a heat exchange component, a battery, and an electric device, which may be, but not limited to, electric toys, electric tools, battery vehicles, electric vehicles, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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 usage requirements, the battery 100 may include a plurality of battery cells 121 and a box body 110. The battery cell 121 refers to the smallest unit that constitutes the battery module 120 or the battery pack. A plurality of battery cells 121 can 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, so as to perform heat exchange on the battery cells 121; a heat exchange element may also be directly provided on the large surface of a battery cell 121 for heat exchange.

[0060] 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 .

[0061] The box 110 may adopt a variety of structures. In some possible embodiments, the box 110 may 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 may be a hollow structure with one end open, and the first part 111 may be a plate-like structure, and 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 may 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 may 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.

[0062] 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.

[0063] 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 .

[0064] 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.

[0065] 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.

[0066] 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 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 possible 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 may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application embodiment does not impose any special restrictions on this. In some possible embodiments, an insulating member may be provided on the inner side of the end cap 122, and the insulating member may be used to isolate the electrical connection components in the housing 123 from the end cap 122 to reduce the risk of short circuit. Exemplarily, the insulating member may be plastic, rubber, etc.

[0067] 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.

[0068] 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 the positive electrode sheet and the 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 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 electrode active material and the negative electrode active material react with the electrolyte, and the pole ear connects the electrode terminal 125 to form a current loop.

[0069] A first aspect of the present application provides a heat exchange assembly 400 for carrying a battery cell 121 and providing a heat exchange function to ensure uniform heat exchange of the battery cell 121, thereby extending the service life and charging and discharging efficiency of the battery.

[0070] See also Figures 5 to 14 As shown, Figure 5 A schematic diagram of the structure of a heat exchange assembly provided in some embodiments of the present application; Figure 6 A schematic diagram of the structure of a heat exchange component provided in some embodiments of the present application; Figure 7 A front view of a heat exchange element provided for some embodiments of the present application; Figure 8 for Figure 7 CC section view of the structure shown; Fig. 9 and Fig.11 They are schematic diagrams of the structures of current collecting parts provided in some embodiments of the present application; Fig.10 and Fig.12 They are respectively schematic diagrams of the flow of heat exchange medium in the heat exchange assembly provided in some embodiments of the present application, wherein the single-line arrow represents the flow direction of the heat exchange medium; Fig.13 Schematic diagram of the internal structure of the heat exchange assembly provided in other embodiments of the present application.

[0071] The heat exchange assembly 400 includes a heat exchange element 10. The side wall of the heat exchange element 10 usually serves as the main wall structure for supporting the battery cell 121; the heat exchange element 10 includes a heat exchange channel 13 with an inlet, and the heat exchange channel 13 contains a heat exchange medium. The heat exchange medium can be water, alcohol or glycerin. When the heat exchange medium flows in the heat exchange channel 13, it can effectively absorb the heat transferred from the side wall of the heat exchange element 10 or transfer the heat to the side wall of the heat exchange element 10 to achieve heat dissipation.

[0072] Along the flow direction of the heat exchange medium, the heat exchange channel 13 includes a first flow section 11 and a second flow section 12. The first flow section 11 is closer to the inlet than the second flow section 12. The wall thickness of the side wall of at least one side of the heat exchange element 10 corresponding to the first flow section 11 is greater than the wall thickness of the side wall of the second flow section 12. In this way, the wall thickness of the side wall of at least one side of the heat exchange element 10 corresponding to the first flow section 11 adopts a relatively thick wall thickness A, thereby reducing the heat exchange efficiency at this location to a certain extent. The heat exchange medium that has just flowed into the heat exchange channel 13 from the inlet has a relatively good temperature quality. Even at a relatively low heat exchange efficiency, it can still exchange heat with the battery cell 121 to keep it at a suitable temperature; the wall thickness of the side wall of at least one side of the heat exchange element 10 corresponding to the second flow section 12 adopts a relatively thin wall thickness B, thereby improving the heat exchange efficiency at this location to a certain extent. The heat exchange medium has been flowing continuously in the heat exchange channel 13 for a period of time. A certain degree of heat exchange is performed. When the heat exchange medium with relatively poor temperature quality flows to the second flow section 12 of the heat exchange channel 13, a higher heat exchange efficiency is obtained through the thinner side wall thickness, so that the heat exchange medium can still efficiently exchange heat with the battery cell 121 and keep it at a suitable temperature; further, during the process of flowing and exchanging heat in the entire heat exchange channel 13, the heat exchange medium can provide relatively good and uniform heat exchange efficiency to various positions of the battery cell 121, avoiding uneven heat exchange of the battery cell 121, thereby ensuring good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0073] Optionally, combined Figure 8 As shown, along the second direction X of the heat exchange element 10, the wall thickness A of the heat exchange side wall 130 corresponding to one end of the heat exchange channel 13 is greater than the wall thickness B of the heat exchange side wall 130 corresponding to the other end. Generally, the wall thickness of one end of the heat exchange channel 13 can be set to A, 5mm≤A≤8mm, and the wall thickness of the other end of the heat exchange channel 13 can be set to B, 1mm≤B≤6mm.

[0074] Optionally, the heat exchange element 10 is a harmonica tube heat exchange plate, a profile liquid heat exchange plate or a stamping liquid heat exchange plate.

[0075] Optionally, the heat exchanger 10 may be an aluminum alloy tube shell, which has good strength, light weight and good thermal conductivity. In addition, the heat exchanger 10 may also be a plastic tube shell, which is subject to the specific design.

[0076] Optionally, the cross-section of the heat exchanger 10 is a flat plate structure, and the heat exchange side walls 130 on the heat exchanger 10 are usually two large surfaces with a larger area arranged relatively to each other. The heat exchanger 10 also includes a side surface (not marked) connecting the two heat exchange side walls 130. The heat exchange side walls 130 of the heat exchanger 10 are usually horizontal plate surfaces or curved surfaces close to horizontal, wherein one or both sides of the heat exchange side walls 130 can be used to bear the weight of the battery cell 121, and the side surfaces can be curved surfaces to improve the overall rigidity.

[0077] In some possible embodiments, see Figures 1 to 10 As shown, the heat exchange element 10 includes a heat exchange side wall 130 for heat-conducting connection to the battery cell, and the wall thickness of the heat exchange side wall 130 corresponding to the first flow section 11 is greater than the wall thickness corresponding to the second flow section 12 .

[0078] The heat exchange side wall 130 is the main wall structure for supporting the battery cells 121. The heat exchange side wall 130 can be two pieces, and are arranged oppositely along the third direction Z of the heat exchange element 10. The heat exchange side wall 130 can be one piece, and is arranged on one side of the heat exchange element 10 along the third direction Z.

[0079] The heat of the battery cell 121 is exchanged with the heat exchange medium through the heat exchange side wall 130. By setting the wall thickness of the heat exchange side wall 130 corresponding to the first flow section 11 to be greater than the wall thickness of the second flow section 12, the heat exchange medium has a relatively high heat exchange efficiency in the second flow section 12, and the heat exchange medium has a relatively low heat exchange efficiency in the first flow section 11. As a result, during the flow and heat exchange process of the heat exchange medium in the entire heat exchange channel 13, it can provide relatively good and uniform heat exchange efficiency to various positions of the battery cell 121, avoiding uneven heat exchange of the battery cell 121, thereby ensuring good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0080] In some possible embodiments, see Figures 1 to 14 As shown, the heat exchange element 10 includes a plurality of heat exchange channels 13 arranged side by side along a first direction Y, and ends of the plurality of heat exchange channels 13 arranged side by side in a second direction X are connected in series.

[0081] By connecting in series the ends of multiple side-by-side heat exchange channels 13 in the second direction X, multiple side-by-side heat exchange channels 13 can be connected to form an S shape, a U shape or an I shape, which is subject to the design and is not limited in the embodiments of the present application.

[0082] The heat exchange medium continuously flows and exchanges heat in a preset path formed by a plurality of heat exchange channels 13, and by adjusting the wall thickness of the heat exchange side wall 130 corresponding to each heat exchange channel 13, the heat exchange medium in the heat exchange channel 13 can evenly exchange heat with the battery cell 121, so that the heat exchange medium is kept at a suitable temperature, avoiding uneven heat exchange of the battery cell 121, thereby ensuring good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0083] In some possible embodiments, see Figures 5 to 8 ,as well as Figures 11 to 13 As shown, multiple groups of heat exchange channels 13 are connected in series end to end.

[0084] The first current collector 201 is provided with a liquid inlet 21a, and the second current collector 202 is provided with a liquid outlet 21b. The first flow channel 131 is connected to the liquid inlet 21a, and the third flow channel 133 is connected to the liquid inlet 21b. Multiple groups of heat exchange flow channels 13 are connected in series in an S-shaped winding arrangement in the heat exchange element 10 for heat exchange, so that the heat exchange effect is uniform.

[0085] In some possible embodiments, see Figures 1 to 14 As shown, one of the heat exchange channels 13 is the first channel 131, and the other heat exchange channel 13 is the second channel 132. The first channel 131 is closer to the inlet than the second channel 132. The first channel 131 has a first heat exchange side wall 101 for thermally connecting to the battery cell 121, and the second channel 132 has a second heat exchange side wall 102 for thermally connecting to the battery cell 121. The wall thickness of the first heat exchange side wall 101 is greater than the wall thickness of the second heat exchange side wall 102.

[0086] Along the flow direction of the heat exchange medium, the first flow channel 131 is closer to the inlet of the heat exchange medium than the second flow channel 132, that is, the heat exchange medium flowing in from the outside first passes through the first flow channel 131, and then flows into the second flow channel 132 in sequence from the first flow channel 131. In this way, by designing the wall thickness of the first heat exchange side wall 101 to be greater than the wall thickness of the second heat exchange side wall 102, the heat exchange efficiency of the heat exchange medium at the first flow channel 131 is reduced to a certain extent, and the heat exchange medium just flowing into the heat exchange flow channel 13 has a relatively good temperature quality. Even at a relatively low heat exchange efficiency, it can still exchange heat with the battery cell 121 to keep it at a suitable temperature; the wall thickness of the second heat exchange side wall 102 is relatively thin, so to a certain extent To improve the heat exchange efficiency of the second flow channel 132, the heat exchange medium flows sequentially from the first flow channel 131 to the second flow channel 132 and continuously flows to perform a certain degree of heat exchange. When the heat exchange medium with relatively poor temperature quality flows into the second flow channel 132, the second flow channel 132 is designed to have a thinner wall thickness to obtain a higher heat exchange efficiency, so that the heat exchange medium can still exchange heat with the battery cell 121 to keep it at a suitable temperature; further, the heat exchange medium flows in the entire heat exchange component 10, and can provide relatively good and uniform heat exchange efficiency to various positions of the battery cell 121, avoiding uneven heat exchange of the battery cell, thereby ensuring good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0087] In some possible embodiments, see Figures 1 to 8 ,as well as Fig.12 and Fig.13 As shown, the first flow channel 131 includes a first flow section 11 and a second flow section 12 , and the wall thickness of the first heat exchange side wall 101 corresponding to the first flow section 11 is greater than the wall thickness of the first heat exchange side wall 101 corresponding to the second flow section 12 .

[0088] The heat of the battery cell 121 is exchanged with the heat exchange medium through the first heat exchange side wall 101 corresponding to the first flow channel 131, and the first flow section 11 is closer to the inlet than the second flow section 12; specifically, during the flow of the heat exchange medium in the first flow channel 131, the heat exchange medium flows in from the inlet and first flows into the first flow section 11, and then flows into the second flow section 12 in sequence after heat exchange. By setting the wall thickness of the first heat exchange side wall 101 corresponding to the first flow section 11 to be greater than the wall thickness of the second flow section 12, the heat exchange medium has a relatively high heat exchange efficiency in the second flow section 12, and the heat exchange medium has a relatively low heat exchange efficiency in the first flow section 11, so that the heat exchange medium has a relatively uniform heat exchange capacity during the flow and heat exchange process of the entire first flow channel 131; the heat exchange medium can provide relatively good and uniform heat exchange efficiency to various positions of the battery cell 121, avoiding the situation of uneven heat exchange of the battery cell 121, thereby ensuring the good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0089] In some possible embodiments, see Figures 1 to 8 ,as well as Fig.12 and Fig.13 As shown, the second flow channel 132 includes a third flow segment 1321 and a fourth flow segment 1322 , and the wall thickness of the second heat exchange side wall 102 corresponding to the third flow segment 1321 is greater than the wall thickness of the second heat exchange side wall 102 corresponding to the fourth flow segment 1322 .

[0090] The heat of the battery cell 121 is exchanged with the heat exchange medium through the second heat exchange side wall 102 corresponding to the second flow channel 132, and the third flow section 1321 is closer to the inlet than the fourth flow section 1322. Specifically, during the flow of the heat exchange medium in the second flow channel 132, the heat exchange medium flows out from the second flow section 12 and first flows into the third flow section 1321. By setting the wall thickness of the second heat exchange side wall 102 corresponding to the third flow section 1321 to be greater than the wall thickness of the second heat exchange side wall 102 corresponding to the fourth flow section 1322, the heat exchange medium has a relatively high heat exchange efficiency in the fourth flow section 1322, and the heat exchange medium has a relatively low heat exchange efficiency in the third flow section 1321, so that the heat exchange medium has a relatively uniform heat exchange capacity during the flow and heat exchange of the entire second flow channel 132; ensuring that the heat exchange medium can provide relatively good and uniform heat exchange efficiency to various positions of the battery cell 121 to avoid uneven heat exchange.

[0091] In some possible embodiments, see Figures 1 to 8 ,as well as Fig.12 and Fig.13 As shown, one of the heat exchange channels 13 is the third channel 133 .

[0092] The third flow channel 133 has a third heat exchange side wall 103 for heat conduction connection to the battery cell, and the wall thickness of the second heat exchange side wall 102 is greater than the wall thickness of the third heat exchange side wall 103. The third flow channel 133 includes a fifth flow segment 1331 and a sixth flow segment 1332, and the wall thickness of the third heat exchange side wall 103 corresponding to the fifth flow segment 1331 is greater than the wall thickness of the second heat exchange side wall 102 corresponding to the sixth flow segment 1332.

[0093] The heat of the battery cell 121 is exchanged with the heat exchange medium through the third heat exchange side wall 103 corresponding to the third flow channel 133, and the fifth flow section 1331 is closer to the inlet than the sixth flow section 1332. The flow process of the heat exchange medium in the third flow channel 133 is similar to that of the first flow channel 131 and the second flow channel 132, and will not be repeated here.

[0094] The first flow channel 131, the second flow channel 132 and the third flow channel 133 are arranged side by side in sequence along the first direction Y, so that the heat exchange medium can be evenly distributed and flow in the heat exchange element 10. The heat exchange element 10 includes a first end and a second end opposite to each other along the second direction, the first flow channel 131 and the second flow channel 132 are connected in series at the first end, and the second flow channel 132 and the third flow channel 133 are connected in series at the second end. The heat exchange element 10 includes a heat exchange side wall 130 on at least one side of the third direction, and the first direction Y, the second direction X and the third direction Z are perpendicular to each other. In the embodiment of the present application, refer to Figure 6 In the orientation shown, the first direction Y may be the width direction of the heat exchanger 10 , the second direction X may be the length direction of the heat exchanger 10 , and the third direction Z may be the thickness direction of the heat exchanger 10 .

[0095] The wall thickness of the heat exchange side wall 130 corresponding to the first flow channel 131 is greater than the wall thickness of the heat exchange side wall 130 corresponding to the second flow channel 132 , and the wall thickness of the heat exchange side wall 130 corresponding to the second flow channel 132 is greater than the wall thickness of the heat exchange side wall 130 corresponding to the third flow channel 133 .

[0096] Combination Figures 6 to 8 , Fig.12 as well as Fig.13 As shown, the heat exchange medium can flow through the first flow channel 131, the second flow channel 132 and the third flow channel 133 in the heat exchange element 10 in sequence. Specifically, during the heat exchange process of the heat exchange medium flowing in the heat exchange element 10, the heat exchange medium flows in from the inlet and first flows into the first flow segment 11, and then flows into the second flow segment 12 in sequence after heat exchange, the heat exchange medium flows out from the second flow segment 12 and then flows into the third flow segment 1321, and then flows into the fourth flow segment 1322 in sequence after heat exchange, the heat exchange medium flows out from the fourth flow segment 1322 and then flows into the fifth flow segment 1331, and then flows into the sixth flow segment 1332 in sequence after heat exchange.

[0097] By setting the wall thickness of the heat exchange side wall 130 corresponding to the first flow channel 131 to be greater than the wall thickness of the heat exchange side wall 130 corresponding to the second flow channel 132, and the wall thickness of the heat exchange side wall 130 corresponding to the second flow channel 132 to be greater than the wall thickness of the heat exchange side wall 130 corresponding to the third flow channel 133, the heat exchange medium has a relatively high heat exchange efficiency in the third flow channel 133, the heat exchange medium has a relatively medium heat exchange efficiency in the second flow channel 132, and the heat exchange medium has a relatively low heat exchange efficiency in the first flow channel 131. In this way, the heat exchange medium can have a relatively uniform heat exchange capacity during the process of flowing and exchanging heat in the entire heat exchange element 10; that is, the heat exchange medium that has just flowed into the first flow channel 131 from the inlet The heat exchange medium has a relatively good temperature quality, and even at a relatively low heat exchange efficiency, it can still exchange heat for the battery cell 121 to keep it at a suitable temperature; the heat exchange medium flowing into the second flow channel 132 has undergone a certain degree of heat exchange, and has a relatively medium temperature quality. The heat exchange medium exchanges heat in the second flow channel 132 with a relatively medium heat exchange efficiency, and can still keep the battery cell 121 at a suitable temperature; the heat exchange medium flowing into the third flow channel 133 has undergone a large degree of heat exchange, and has a relatively low temperature quality. The heat exchange medium exchanges heat in the third flow channel 133 with a relatively high heat exchange efficiency, and keeps the battery cell 121 at a suitable temperature. Furthermore, the heat exchange medium in the heat exchange element 10 can provide relatively good and uniform heat exchange efficiency for various positions of the battery cell 121, avoiding the situation of uneven heat exchange of the battery cell 121, thereby ensuring the good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0098] In some possible embodiments, see Figures 1 to 14 As shown, the heat exchange assembly further includes two current collecting members 20 , and the two current collecting members 20 are respectively connected to the first end and the second end of the heat exchange member 10 .

[0099] The current collector 20 is used to connect external pipelines to input or output heat exchange medium. The current collector 20 is matched with the heat exchanger 10. Specifically, the two current collectors 20 are respectively matched with the first end and the second end of the heat exchanger 10 along the second direction, and are connected with the heat exchange channel 13; the area where the current collector 20 and the heat exchanger 10 are sleeved is usually not used to place the battery cell 121; in this way, the heat exchange medium enters one end of the heat exchange channel 13 through the current collector 20 at one end of the heat exchanger 10, and circulates in the heat exchange channel 13, so that the heat exchanger 10 can provide heat exchange for the battery cell 121 to ensure that the battery operates at a suitable ambient temperature; the heat exchange medium after heat exchange flows from the other end of the heat exchange channel 13 back to the current collector 20 at the other end, realizing the circulation of the heat exchange medium.

[0100] Combination Figure 5In the orientation shown, one of the collectors 20 is connected to the left end of the heat exchanger 10 as the input end of the heat exchange medium, and the other collector 20 is connected to the right end of the heat exchanger 10 as the outflow end of the heat exchange medium, and the connection method can be interference fit. The heat exchange flow channel 13 is formed with flow channel openings (not marked) at both ends of the heat exchanger 10 along the second direction.

[0101] The heat exchange medium flows in from the collector 20 on the left side, and enters the heat exchange flow channel 13 through the flow channel opening at the left end of the heat exchange element 10. 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 element 10; or it can flow in a winding manner along the heat exchange flow channel 13 in the heat exchange element 10, so that the heat exchange element 10 provides heat exchange for the battery cell 121 to ensure that the battery operates at a suitable ambient temperature. The specific design shall prevail; the heat exchange medium after heat exchange flows out from the flow channel opening at the right end of the heat exchange element 10 to the collector 20 on the right side, and then flows back to the external pipeline to realize the recycling of the heat exchange medium.

[0102] Optionally, the shape of the opening cross section of the current collecting member 20 should be compatible with the end of the heat exchange member 10 to ensure that the two can be plugged in.

[0103] Optionally, the ends of the current collecting member 20 and the heat exchange member 10 may be connected by interference fitting, welding or bolts.

[0104] In some possible embodiments, see Figures 9 to 13 As shown, the current collecting member 20 includes a connecting pipe 21 and a body 22 .

[0105] The body 22 is usually made of plastic or aluminum alloy. The cross-sectional shape of the opening of the body 22 should be compatible with the cross-sectional shape of the end of the heat exchanger 10. The opening of the body 22 can be a flat slot, which is convenient for the end of the heat exchanger 10 to be inserted into the opening of the body 22. The connecting pipe 21 is usually a metal pipe joint and is laterally inserted into the side wall of the body 22. The section of the connecting pipe 21 located inside the body 22 has a connecting hole 27, so as to communicate with the flow channel. The section of the connecting pipe 21 located outside the body 22 is formed as a connecting port, which is used to communicate with the pipeline of the external heat exchange medium, and will not be repeated here.

[0106] In some possible embodiments, see Figures 9 to 13 As shown, the body 22 includes a transition cavity 26 and a connecting cavity 25 which are separated; specifically, the current collecting member 20 includes a dividing portion 24 disposed in the body 22 , and the dividing portion 24 divides the space in the body 22 into the connecting cavity 25 and the transition cavity 26 .

[0107] The turning cavity 26 is used to connect any two adjacent flow channels along the second direction among the first flow channel 131 , the second flow channel 132 and the third flow channel 133 , and the connecting cavity 25 connects the connecting pipe 21 and the remaining flow channel.

[0108] The turning cavity 26 can be used to connect the first flow channel 131 with the second flow channel 132, so that the connecting cavity 25 connects the connecting pipe 21 with the third flow channel 133. The turning cavity 26 can also be used to connect the second flow channel 132 with the third flow channel 133, so that the connecting cavity 25 connects the connecting pipe 21 with the first flow channel 131.

[0109] A communication hole 27 may be formed in the section of the communication pipe 21 located in the body 22 . One end of the communication hole 27 is connected to the communication pipe 21 , and the other end is connected to the communication cavity 25 .

[0110] It is understandable that the structures and connection relationships of the two current collecting parts 20 are similar or identical. For the convenience of description, one of the current collecting parts 20 is defined as the first current collecting part 201, and the other current collecting part 20 is defined as the second current collecting part 202. The first current collecting part 201 includes a first connecting tube 211, a first connecting cavity 251 and a first turning cavity 261, and the second current collecting part 202 includes a second connecting tube 212, a second connecting cavity 252 and a second turning cavity 262.

[0111] Among them, see Figures 1 to 8 , Fig.12 as well as Fig.13 As shown, the first connecting chamber 251 is used to connect the first connecting tube 211 and the first flow channel 131, and the first turning chamber 261 is used to connect the second flow channel 132 and the third flow channel 133; the second connecting chamber 252 is used to connect the third flow channel 133 and the second connecting tube 212, and the second turning chamber 262 is used to connect the first flow channel 131 and the second flow channel 132.

[0112] See also Figure 8 As shown, combined with Fig.12 The connecting tube 21 of the first current collecting member 201 is used as the liquid inlet 21a, and the connecting tube 21 of the second current collecting member 202 is used as the liquid outlet 21b; the first flow section 11 of the first flow channel 131 is connected to the liquid inlet 21a, and the sixth flow section 1332 of the third flow channel 133 is connected to the liquid outlet 21b.

[0113] The heat exchange medium flows in from the liquid inlet 21a and enters the first connecting cavity 251 through the connecting hole 27. Thus, the heat exchange medium flows into the first flow section 11 of the first flow channel 131 and flows downward along the first flow channel 131 to exchange heat with the battery cell 121.

[0114] When the heat exchange medium reaches the second flow section 12 at the lower end along the first flow channel 131; the second flow section 12 is connected to the second turning cavity 262 of the second collector 202, and the third flow section 1321 of the second flow channel 132 is connected to the second turning cavity 262 of the second collector 202, and the heat exchange medium enters the third flow section 1321 through the second turning cavity 262. In this way, the heat exchange medium continues to flow upward along the second flow channel 132 and realizes heat exchange with the battery cell 121.

[0115] When the heat exchange medium reaches the fourth flow section 1322 at the upper end along the second flow channel 132; the fourth flow section 1322 is connected to the first turning cavity 261 of the first collector 201, and the third flow channel 133 is connected to the first turning cavity 261 of the first collector 201, and the heat exchange medium enters the third flow channel 133 through the first turning cavity 261 of the first collector 201. In this way, the heat exchange medium flows into the third flow channel 133, and flows downward again along the third flow channel 133 to realize heat exchange with the battery cell 121.

[0116] Finally, by setting the first flow channel 131, the second flow channel 132 and the third flow channel 133 in series in the heat exchange element 10, the heat exchange medium is allowed to meander in an S shape in the heat exchange element 10, and by adjusting the wall thickness of the heat exchange side wall 130 corresponding to the first flow channel 131, the second flow channel 132 and the third flow channel 133, the heat exchange medium can evenly exchange heat with the battery cell 121 to keep it at a suitable temperature, avoiding uneven heat exchange of the battery cell 121, thereby ensuring good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0117] Along the flow direction of the heat exchange medium, the heat exchange side wall 130 may be gradually thinned.

[0118] In this way, the wall thickness A of the heat exchange side wall 130 corresponding to the end of the heat exchange channel 13 close to the liquid inlet 21a is relatively thick, thereby reducing the heat exchange efficiency at this location to a certain extent, and the heat exchange medium flowing into the heat exchange channel 13 from the liquid inlet 21a has a relatively good temperature quality. Even at a relatively low heat exchange efficiency, it can still exchange heat for the battery cell 121 to keep it at a suitable temperature; the wall thickness B of the heat exchange side wall 130 corresponding to the end of the heat exchange channel 13 close to the liquid outlet 21b is relatively thin, thereby improving the heat exchange efficiency at this location to a certain extent. The heat exchange medium flows in the heat exchange channel 13 and exchanges heat to a certain extent. When the temperature of this part is low, the heat exchange medium flows in the heat exchange channel 13 and exchanges heat to a certain extent. The heat exchange medium with relatively poor quality flows to the end of the heat exchange channel 13 close to the liquid outlet 21b, and obtains a higher heat exchange efficiency through the thinner heat exchange side wall 130, so that the heat exchange medium can still exchange heat with the battery cell 121 to keep it at a suitable temperature. Furthermore, by adjusting the heat exchange efficiency of the battery cell 121 in different areas of the heat exchange component 10, the heat exchange medium can evenly exchange heat with the battery cell 121 during the process of flowing and exchanging heat in the entire heat exchange component 10, avoiding uneven heat exchange of the battery cell 121, thereby ensuring good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0119] In some possible embodiments, see Fig.10 As shown, a plurality of groups of heat exchange channels 13 may be arranged in parallel between two collectors 20 .

[0120] Among them, one current collector 20 is provided with a liquid inlet 21a, and the other current collector 20 is provided with a liquid outlet 21b; the first flow channel 131, the second flow channel 132 and the third flow channel 133 extend along the second direction X, and the two ends of the first flow channel 131, the second flow channel 132 and the third flow channel 133 are directly connected with the liquid inlet 21a and the liquid outlet 21b respectively. In this way, the heat exchange medium flows into the current collector 20 from the liquid inlet 21a, and is divided into multiple streams of heat exchange medium, which enter each heat exchange channel 13 separately for heat exchange. By adjusting the wall thickness of the corresponding heat exchange side wall 130 in the heat exchange channel 13, the heat exchange medium in each group of heat exchange channels 13 can evenly exchange heat with the battery cell, so that it is kept at a suitable temperature, avoiding the uneven heat exchange of the battery cell 121, thereby ensuring the good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0121] In some possible embodiments, see Figures 1 to 13 As shown, the current collecting member 20 includes a stopper 23 disposed in the body 22. When the opening of the body 22 is sleeved on the end of the heat exchanger 10, the stopper 23 can interfere with the end of the heat exchanger 10.

[0122] By the blocking portion 23 abutting against one end surface of the heat exchanger 10, a limit is formed on the insertion distance between the main body 22 and the heat exchanger 10 to prevent cracking caused by excessive insertion. The welding area of ​​the collector 20 and the heat exchanger 10 can also be guaranteed by controlling the insertion depth to ensure stable welding quality.

[0123] Optionally, the stopper 23 and the body 22 are formed by integral stamping or integral casting.

[0124] Optionally, the baffle is a bump or a step.

[0125] In some possible embodiments, the heat exchange element 10 includes a plurality of support plates 15 supported between two heat exchange side walls 130 , and the plurality of support plates 15 extend along the second direction X and are spaced apart from each other to separate each group of heat exchange channels 13 into a plurality of sub-channels.

[0126] All the support plates 15 are arranged in intervals in the heat exchanger 10 and extend along the second direction of the heat exchanger 10 to both ends. Specifically, a part of the support plates 15 divides the first flow channel 131 into mutually independent first sub-flow channels 131a, a part of the support plates 15 divides the second flow channel 132 into mutually independent second sub-flow channels 132a, and a part of the support plates 15 divides the third flow channel 133 into mutually independent third sub-flow channels 133a, so that the heat exchange medium can enter different sub-flow channels and flow along the predetermined trajectory, thereby improving the heat exchange efficiency.

[0127] That is to say, each group of heat exchange channels 13 may have only one channel or may be composed of multiple sub-channels. On this basis, multiple groups of heat exchange channels 13 may be arranged in parallel or connected in series to form an S-shaped meandering pattern, which is subject to the design.

[0128] Optionally, the support plate 15 is integrally connected to the wall surface of the heat exchanger 10 , and the two can be processed at one time by injection molding, stamping, etc., which has a simple process and low cost.

[0129] Optionally, the support plate 15 may be an aluminum alloy plate or a plastic plate.

[0130] In some possible embodiments, see Figures 1 to 8 ,as well as Figures 11 to 13As shown, as the heat exchange medium meanders along the S shape in the heat exchange element 10, and by adjusting the wall thickness of the heat exchange side wall 130 corresponding to the first flow channel 131, the second flow channel 132 and the third flow channel 133, in any heat exchange flow channel 13, the wall thickness A of the heat exchange side wall 130 corresponding to one end along the second direction X of the heat exchange element 10 is greater than the wall thickness B of the heat exchange side wall 130 corresponding to the other end; between different heat exchange flow channels 13, the wall thickness of the heat exchange side wall 130 at the same position also gradually becomes thinner along the first direction Y of the heat exchange element 10, thereby effectively adjusting the heat exchange efficiency of different areas in the heat exchange element 10 for the battery cell 121, so that the heat exchange medium in the heat exchange flow channel 13 can evenly exchange heat with the battery cell 121, so that it is kept at a suitable temperature, and the uneven heat exchange of the battery cell 121 is avoided, thereby ensuring the good performance of the battery cell 121 and extending the service life of the battery cell 121.

[0131] A second aspect of the present application provides a battery 100. Figures 1 to 14 As shown, the battery 100 includes a battery cell 121 and the above-mentioned heat exchange assembly 400, and the side wall of at least one side of the heat exchange element 10 is thermally connected to the battery cell 121 to achieve uniform heat exchange.

[0132] In some possible embodiments, see Figures 1 to 5 ,as well as Fig.14 As shown, the battery cell 121 includes a first surface 126 . The first surface 126 is a side surface of the battery cell 121 with the largest surface area. At least one side wall of the heat exchange element 10 is thermally connected to the first surface 126 .

[0133] It should be noted that the larger surface on one side of the heat exchange element 10 can be used as a heat exchange side wall 130 to exchange heat with the first surface 126 of the battery cell 121, and the opposite sides of the heat exchange element 10 can both be used as heat exchange side walls 130 to exchange heat with the first surface 126 of each battery cell 121.

[0134] In addition, the first surface 126 is a relatively large surface on the cover body 123, and the first surface 126 is bonded to the heat exchange side wall 130 to achieve a good heat exchange effect. In addition, the electrode terminal 125 located on the end cover 122 can also avoid the heat exchange side wall 130 to prevent interference between the two.

[0135] Similarly, the end cover 122 may also be provided with a pressure relief mechanism (not shown), such as an explosion-proof valve, and the pressure relief mechanism may also avoid the heat exchange side wall 130 to prevent interference between the two.

[0136] A third 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.

[0137] 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.

[0138] 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 heat exchange component, characterized in that: include: A heat exchange element (10) comprises a heat exchange channel (13) having an inlet, wherein the heat exchange channel (13) contains a heat exchange medium, and along the flow direction of the heat exchange medium, the heat exchange channel (13) comprises a first flow section (11) and a second flow section (12), wherein the first flow section (11) is closer to the inlet than the second flow section (12), and the wall thickness of the side wall of at least one side of the heat exchange element (10) corresponding to the first flow section (11) is greater than the wall thickness corresponding to the second flow section (12).

2. The heat exchange assembly according to claim 1, characterized in that: The heat exchange component (10) comprises a heat exchange side wall (130) for heat conduction connection to the battery cell, and the wall thickness of the heat exchange side wall (130) corresponding to the first flow section (11) is greater than the wall thickness corresponding to the second flow section (12).

3. The heat exchange assembly according to claim 2, characterized in that: The heat exchange side wall (130) gradually becomes thinner along the flow direction of the heat exchange medium.

4. The heat exchange assembly according to claim 1, characterized in that: The heat exchange element comprises a plurality of heat exchange channels (13) arranged side by side in a first direction, and the ends of the plurality of heat exchange channels (13) arranged side by side in a second direction are connected in series.

5. The heat exchange assembly according to claim 4, characterized in that: One of the heat exchange channels (13) is a first channel (131), and the other of the heat exchange channels (13) is a second channel (132). The first channel (131) is closer to the inlet than the second channel (132). The first channel (131) has a first heat exchange side wall (101) for heat-conducting connection to a battery cell, and the second channel (132) has a second heat exchange side wall (102) for heat-conducting connection to the battery cell. The wall thickness of the first heat exchange side wall (101) is greater than the wall thickness of the second heat exchange side wall (102).

6. The heat exchange assembly according to claim 5, characterized in that: The first flow channel (131) comprises the first flow section (11) and the second flow section (12), and the wall thickness of the first heat exchange side wall (101) corresponding to the first flow section (11) is greater than the wall thickness of the first heat exchange side wall (101) corresponding to the second flow section (12).

7. The heat exchange assembly according to claim 6, characterized in that: The second flow channel (132) includes a third flow segment (1321) and a fourth flow segment (1322), and the wall thickness of the second heat exchange side wall (102) corresponding to the third flow segment (1321) is greater than the wall thickness of the second heat exchange side wall (102) corresponding to the fourth flow segment (1322).

8. The heat exchange assembly according to any one of claims 5 to 7, characterized in that: One of the heat exchange channels (13) is a third channel (133); The first flow channel (131), the second flow channel (132) and the third flow channel (133) are arranged in sequence side by side along the first direction; the heat exchange element (10) comprises a first end and a second end opposite to each other along the second direction; the first flow channel (131) and the second flow channel (132) are connected in series at the first end; the second flow channel (132) and the third flow channel (133) are connected in series at the second end; the heat exchange element (10) comprises a heat exchange side wall (130) on at least one side in the third direction; the first direction, the second direction and the third direction are perpendicular to each other; The wall thickness of the heat exchange side wall (130) at a position corresponding to the first flow channel (131) is greater than the wall thickness of the heat exchange side wall (130) at a position corresponding to the second flow channel (132), and the wall thickness of the heat exchange side wall (130) at a position corresponding to the second flow channel (132) is greater than the wall thickness of the heat exchange side wall (130) at a position corresponding to the third flow channel (133).

9. The heat exchange assembly according to claim 8, characterized in that: The heat exchange component further comprises two current collecting members (20), wherein the two current collecting members (20) are respectively connected to the first end and the second end of the heat exchange member (10); The current collecting member (20) comprises a connecting tube (21) and a body (22); the body (22) comprises a separated turning cavity (26) and a connecting cavity (25); the turning cavity (26) is used to connect any two adjacent flow channels along the second direction among the first flow channel (131), the second flow channel (132) and the third flow channel (133); and the connecting cavity (25) connects the connecting tube (21) and the remaining flow channel.

10. The heat exchange assembly according to claim 9, characterized in that: One of the current collecting pieces (20) is a first current collecting piece (201), and the other current collecting piece (20) is a second current collecting piece (202); the first current collecting piece (201) comprises a first connecting pipe (211), a first connecting cavity (251), and a first turning cavity (261); and the second current collecting piece (202) comprises a second connecting pipe (212), a second connecting cavity (252), and a second turning cavity (262); The first connecting cavity (251) is used to connect the first connecting tube (211) and the first flow channel (131), and the first turning cavity (261) is used to connect the second flow channel (132) and the third flow channel (133); the second connecting cavity (252) is used to connect the third flow channel (133) and the second connecting tube (212), and the second turning cavity (262) is used to connect the first flow channel (131) and the second flow channel (132).

11. A battery, characterized in that: It comprises a battery cell (121) and a heat exchange assembly according to any one of claims 1 to 10, wherein the side wall of at least one side of the heat exchange element (10) is heat-conductingly connected to the battery cell.

12. The battery according to claim 11, characterized in that The battery cell (121) comprises a first surface (126), the first surface (126) being a side surface of the battery cell with the largest surface area, and at least one side wall of the heat exchange element (10) is thermally connected to the first surface (126).

13. An electrical device, characterized in that: Comprising a battery as claimed in claim 11 or 12.

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