Battery and electric device

Abstract

The invention discloses a battery and an electric device. The battery comprises a plurality of heat exchange pipes, at least one heat exchange pipe is a first heat exchange pipe, the first heat exchange pipe comprises a first heat exchange flow channel and a second heat exchange flow channel, the second heat exchange flow channel is bent to form a U-shaped area, the first heat exchange flow channel is arranged in the U-shaped area in a bent mode and is connected with the second heat exchange flow channel in a bent mode, and the heat exchange pipes are arranged in parallel. The heat exchange tube comprises a plurality of straight heat exchange sections and at least one bent section, the plurality of straight heat exchange sections are arranged at intervals, and the at least one bent section is sequentially connected and communicated with the plurality of straight heat exchange sections; wherein a first reinforcing piece is arranged in at least one bending section. Therefore, the internal and external temperature difference caused by heat exchange between the peripheral battery monomers and the environment can be made up, the heat exchange effect of the battery monomers on the periphery of the battery assembly and the heat exchange effect of the battery monomers in the battery assembly tend to be consistent, and for the heat exchange pipes, the bad conditions of collapse, wrinkling, over-thinness and the like in the forming process of the bending sections can be improved.

Description

[0001] This application is a divisional application of the patent application with the application date of February 6, 2024, application number 202410172478.6, and invention name “Heat exchange tube, battery and electrical device”. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0003] In related technologies, the temperature of the battery assembly is usually controlled by setting up a heat exchange structure in the battery. However, due to the large number of battery cells in the battery assembly, it is difficult for the heat exchange structure to achieve temperature control of the entire battery assembly. Moreover, for the solution of using heat exchange tubes in the corresponding heat exchange structure, the structural strength of the heat exchange tubes has a significant impact on their service life and the risk of airtight failure. Therefore, how to effectively improve the structural strength of the heat exchange tubes has also become a research and development focus in this field. Summary of the Invention

[0004] The embodiments of the present application provide a battery and an electrical device, which can improve the reliability of the battery and the electrical device by increasing the strength of the heat exchange tube.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising a plurality of heat exchange tubes, wherein the plurality of heat exchange tubes are arranged at intervals along a second direction, or arranged around each other, at least one heat exchange tube is a first heat exchange tube, the first heat exchange tube comprises a first heat exchange channel and a second heat exchange channel, the second heat exchange channel is bent to form a U-shaped area, the first heat exchange channel is bent and arranged in the U-shaped area, and is connected to the second heat exchange channel by bending, and the plurality of heat exchange tubes are arranged in parallel; the heat exchange tube comprises a plurality of straight heat exchange sections and at least one bent section, the plurality of straight heat exchange sections are arranged at intervals, and the at least one bent section is sequentially connected and connected to the plurality of straight heat exchange sections; wherein a first reinforcement is provided in at least one bent section.

[0006] In the above technical solution, the second heat exchange channel is bent to form a U-shaped area, and the first heat exchange channel is bent and arranged in the U-shaped area. When the heat exchange tube exchanges heat with the battery assembly, the U-shaped area formed by the outer second heat exchange channel can be opposite to the outer battery cells of the battery, and the first heat exchange channel in the U-shaped area can be opposite to the internal battery cells, so that the heat exchange tube can make up for the internal and external temperature difference caused by the heat exchange between the outer battery cells and the environment, so that the heat exchange effect of the battery cells outside the battery assembly and the battery cells inside the battery assembly tend to be consistent, thereby improving the temperature uniformity of the battery, thereby improving the service life of the battery to a certain extent; by arranging multiple heat exchange tubes, and arranging the multiple heat exchange tubes at intervals along the second direction Y or around each other, the service life of the battery can be increased. The diversity of heat exchange tubes can improve the adaptability of heat exchange tubes, so that they can meet the needs of different batteries, thereby improving the market competitiveness of batteries; at the same time, multiple heat exchange tubes are arranged in parallel, so that multiple heat exchange tubes can exchange heat at the same time, thereby reducing the heat exchange time of the heat exchange tubes and improving the heat exchange efficiency; and the heat exchange tubes are connected and connected in sequence through the bending sections, and a first reinforcement is provided in the bending section, which can improve the collapse, wrinkling, too thinness and other undesirable conditions during the forming process of the bending section, improve the structural strength of the bending section, and make the heat exchange tube have stronger pressure resistance during the application of heat exchange, which is beneficial to improve the service life. In addition, reducing undesirable conditions can increase the contact heat exchange area between the heat exchange tube and the component to be heat exchanged, thereby improving the heat exchange efficiency.

[0007] In some embodiments, a first reinforcement member is disposed in each bending segment.

[0008] In the above technical solution, it is thereby possible to prevent large-scale wrinkling, collapse and other problems from occurring during the bending forming process of each bending section, thereby better improving the overall pressure resistance of the heat exchange tube.

[0009] In some embodiments, the bending section includes two oppositely disposed walls, and the first reinforcement connects the two opposite walls.

[0010] In the above technical solution, the position stability of the first reinforcement member in the bending section can be improved, and it is not easy to be displaced during the bending process and the heat exchange process to affect the structural reinforcement effect.

[0011] In some embodiments, the wall is planar.

[0012] In the above technical solution, the plane is conducive to increasing the heat exchange area between the heat exchange tube and the component to be heat exchanged, improving the heat exchange efficiency, and is more conducive to the connection between the first reinforcement and the wall surface, reducing the difficulty of connection.

[0013] In some embodiments, the first reinforcement member includes a plurality of first reinforcement ribs, which are arranged at intervals along the bending radius of the bending section and divide the heat exchange channel in the bending section into a plurality of sub-channels.

[0014] In the above technical solution, the multiple first reinforcing ribs arranged at intervals along the radial direction can greatly reduce the wrinkled area, and effectively support the bending section in different radial areas, reducing the thinning rate of the plate near the radial outer edge area, thereby greatly improving the structural strength of the bending section and reducing the risk of collapse, deformation and cracking.

[0015] In some embodiments, the first reinforcing rib extends perpendicular to the wall surface.

[0016] In the above technical solution, the first reinforcing rib is perpendicular to the wall surface, so that the height of the first reinforcing rib is smaller and the space occupied is smaller, which is conducive to reducing flow resistance, and the first reinforcing rib has a better supporting effect on the wall surface in the height direction.

[0017] In some embodiments, the first reinforcing rib extends obliquely relative to the wall surface.

[0018] In the above technical solution, the radial width of at least one of the upper side wall and the lower side wall of the radially innermost and radially outermost sub-channels can be reduced, thereby improving the supporting effect of the two first reinforcing ribs at the radially innermost and radially outermost ends on the wall surface.

[0019] In some embodiments, the plurality of first reinforcing ribs have the same inclination direction.

[0020] In the above technical solution, the difficulty of forming the plurality of first reinforcing ribs is reduced.

[0021] In some embodiments, in the bending radius direction of the bending section, the first reinforcing ribs located on both sides of the midpoint of the bending section have opposite inclination directions, and the first reinforcing ribs located on the same side of the midpoint of the bending section have the same inclination direction.

[0022] In the above technical solution, the two first reinforcing ribs adjacent to the midpoint of the bend cooperate with the two wall surfaces to form a trapezoidal or arched structure, which helps improve the compression resistance near the midpoint of the bend and prevents deformation. Furthermore, given a certain bend width, this helps reduce the number of required first reinforcing ribs, thereby lowering overall flow resistance.

[0023] In some embodiments, the plurality of first reinforcing ribs are arranged at equal intervals.

[0024] In the above technical solution, the difficulty of forming the plurality of first reinforcing ribs is reduced, and the flow resistance of different sub-flow channels is made more uniform.

[0025] In some embodiments, in the direction of the bending radius of the bending segment, the width of the sub-channel close to the middle is greater than the width of the sub-channel close to the edge.

[0026] In the above technical solution, during the bending process of the bending section, the areas close to the inner edge and the outer edge are more prone to wrinkling, deformation, thinning and other adverse problems. By arranging denser first reinforcement ribs in the area close to the edge, it is beneficial to improve the structural reinforcement effect of the bending section and improve the anti-extrusion ability; by arranging sparser first reinforcement ribs in the area close to the middle, the number of required first reinforcement ribs can be reduced, the space occupied by the first reinforcement in the bending section can be reduced, the overall flow resistance in the bending section can be reduced, and the heat exchange effect can be improved.

[0027] In some embodiments, the inner edge bending diameter of the bending section is R, the width of the bending section along the bending radius direction is D, R / D is 1 to 3, and in the bending radius direction of the bending section, the sub-channel located in the middle is the first sub-channel, and multiple second sub-channels are provided on both sides of the first sub-channel. The widths of the multiple second sub-channels are equal, and the width of the first sub-channel is greater than the width of the second sub-channel.

[0028] This technical solution not only enhances structural reinforcement but also meets heat exchange capacity requirements. The first sub-channel has a larger width, reducing the number of required first reinforcing ribs and lowering flow resistance. Multiple, smaller second sub-channels effectively prevent defects such as wrinkling and thinning from the inner and outer edges from spreading toward the center, reducing their occurrence and confining them to a smaller radial range, effectively improving extrusion resistance and heat exchange capacity.

[0029] In some embodiments, the maximum width of at least two sub-channels near the edge is L, the thickness of the bending section in a direction perpendicular to the bending plane is H, and H / L is 0.2-3.

[0030] In the above technical solution, within the above ratio range, the dual requirements of reducing wrinkling and collapse problems and reducing flow resistance are taken into account.

[0031] In some embodiments, H / L is 0.8 to 1.2.

[0032] In the above technical solution, the structural reinforcement effect can be further improved, the wrinkling and collapse problems can be improved, and the flow resistance can be reduced.

[0033] In some embodiments, the plurality of first reinforcing ribs are arranged symmetrically or centrally symmetrically about the midpoint of the bending segment.

[0034] In the above technical solution, the force on both sides of the radial midpoint of the bent section is more evenly distributed, and the thinning and thickening are more uniform. Furthermore, during the production process, the tube body can be bent clockwise or counterclockwise, that is, either side of the widthwise edge of the tube body can form the inner edge of the bent section, which is conducive to improving production efficiency.

[0035] In some embodiments, the inner edge bending diameter of the bending section is R, the width of the bending section along the bending radius direction is D, and R is greater than or equal to D.

[0036] In the above technical solution, within the above ratio range, the strength of the bent section can be enhanced by the first reinforcement member without causing excessive flow resistance, thereby taking into account both service life and heat exchange capacity.

[0037] In some embodiments, a second reinforcement member is provided in the straight heat exchange section.

[0038] In the above technical solution, the second reinforcement member can improve the structural strength of the straight heat exchange section, so as to further improve the overall strength of the heat exchange tube and improve the pressure resistance performance.

[0039] In some embodiments, the second reinforcement member includes a second reinforcement rib, and the second reinforcement rib is provided in the middle of the straight heat exchange section in the width direction of the straight heat exchange section.

[0040] In the above technical solution, by providing fewer second reinforcing ribs, the strength requirement can be met and the flow resistance of the heat exchange medium in the straight heat exchange section can be reduced, which is beneficial to improving the heat exchange effect.

[0041] In some embodiments, the first reinforcement member includes a plurality of first reinforcement ribs spaced apart along the bending radius of the bending section, and the second reinforcement member includes a plurality of second reinforcement ribs, which are arranged in one-to-one correspondence with and connected to the first reinforcement ribs.

[0042] In the above technical solution, the heat exchange medium in the multiple sub-channels in the bending section can flow smoothly into the straight heat exchange section under the guidance of the first reinforcement rib and the second reinforcement rib, and in the embodiment in which the straight heat exchange section and the bending section are integrally formed, the first reinforcement rib and the connected second reinforcement rib can be integrally formed, that is, the heat exchange tube can be bent by a single tube to form a straight heat exchange section and a bending section. The length of each straight heat exchange section and bending section is more flexible and is not restricted by the internal first reinforcement rib and the second reinforcement rib, which is conducive to improving production efficiency.

[0043] In some embodiments, the heat exchange tube is formed by bending a single tube; and / or, the heat exchange tube is a flat tube.

[0044] In the above technical solution, the assembly process between the straight heat exchange section and the bent section is omitted, thereby improving production efficiency, and no splicing and sealing is required, which is conducive to reducing the risk of sealing failure.

[0045] In some embodiments, the bent section is integrally formed with the first reinforcement.

[0046] In the above technical solution, one-piece molding can eliminate the assembly process of installing the first reinforcement in a small space in the bending section, thereby improving production efficiency. In addition, the first reinforcement is reliably connected to the bending section and is not prone to relative movement during the bending molding process, thereby affecting the reinforcement effect.

[0047] In some embodiments, the straight heat exchange segment extends along the first direction, and multiple straight heat exchange segments are arranged at intervals along the second direction. The first direction is perpendicular to the second direction. The bending segment connects the two straight heat exchange segments arranged at intervals and is semicircular.

[0048] In the above technical solution, the arrangement of the plurality of straight heat exchange sections is orderly, which is more conducive to increasing the occupied space in the first direction and the second direction, thereby increasing the heat exchange area and improving the heat exchange capacity.

[0049] In some embodiments, among any three adjacent straight heat exchange segments along the second direction, the first end of the middle straight heat exchange segment is connected to the first end of one of the adjacent straight heat exchange segments through a bending segment, and the second end of the middle straight heat exchange segment is connected to the second end of another adjacent straight heat exchange segment through a bending segment.

[0050] In the above technical solution, from one end in the second direction to the other end, the entire heat exchange tube is formed into a serpentine tube extending back and forth along the first direction, which has a better effect of increasing the heat exchange area, and the specifications of the required straight heat exchange sections and bent sections are relatively simple, and each bent section is not easily interfered with by the position of other straight heat exchange sections and bent sections during the bending process, thereby improving production efficiency.

[0051] In some embodiments, at least two straight heat exchange sections extend at an angle, and the bent section is arc-shaped and connects the two straight heat exchange sections at the angle.

[0052] In the above technical solution, by changing the bending angle of the bending section, the angle between two adjacent straight heat exchange sections can be changed, thereby making the extension path of the heat exchange tube more flexible and changeable.

[0053] In some embodiments, the first heat exchange channel includes a plurality of first heat exchange parts, which are arranged at intervals and connected in series by bending.

[0054] In the above technical solution, on the one hand, by setting up multiple first heat exchange parts, the heat exchange area of the first heat exchange channel can be increased, and then the heat exchange area of the first heat exchange tube can be increased, thereby improving the heat exchange effect of the first heat exchange tube; on the other hand, since the internal battery cells are wrapped by the external battery cells, the temperature difference between the internal battery cells is not large. Therefore, by setting up multiple first heat exchange parts, the overall heat exchange effect can be improved while reducing the temperature difference between the internal and external battery cells.

[0055] In some embodiments, the second heat exchange channel includes: a second heat exchange part, a third heat exchange part and a fourth heat exchange part, the second heat exchange part extends along the first side circumference of the first heat exchange channel, the third heat exchange part is connected between the second heat exchange part and the first heat exchange channel, and extends along the second side circumference of the first heat exchange channel, the first end of the third heat exchange part is connected to the second heat exchange part at an angle and the second end is connected to the first heat exchange channel at an angle, the fourth heat exchange part is communicated with the second heat exchange part, is connected to the second heat exchange part at an angle, and extends along the third side circumference of the first heat exchange channel.

[0056] In the above technical solution, by arranging the second heat exchange part, the third heat exchange part and the fourth heat exchange part on three sides of the first heat exchange channel respectively, the second heat exchange channel can surround the first heat exchange channel, thereby increasing the compactness of the arrangement of the first heat exchange tube and realizing the miniaturization of the structure of the first heat exchange tube, which is beneficial to improving the volume energy density of the battery. At the same time, it can also simplify the structure of the first heat exchange tube and facilitate the processing and production of the heat exchange tube.

[0057] In some embodiments, the first heat exchange tube further includes a third heat exchange channel, the first heat exchange channel is connected between the third heat exchange channel and the second heat exchange channel, and the third heat exchange channel is connected to the first heat exchange channel at an angle.

[0058] In the above technical solution, by providing the third heat exchange channel, the heat exchange area of the first heat exchange tube can be further increased, thereby further improving the heat exchange effect of the first heat exchange tube.

[0059] In some embodiments, the first heat exchange channel includes multiple first heat exchange parts, and the multiple first heat exchange parts are bent and connected in sequence in the second direction. The third heat exchange channel is arranged on the side of the first heat exchange channel away from the third heat exchange part. The third heat exchange channel is connected to the one of the multiple first heat exchange parts that is closest to the second heat exchange part along the second direction. The third heat exchange channel extends along the second direction toward a direction away from the second heat exchange part, and the first heat exchange part extends along the first direction, and the first direction is set at an angle to the second direction.

[0060] In the above technical solution, by adding a third heat exchange channel and connecting the third heat exchange channel to the one of the multiple first heat exchange parts that is closest to the second heat exchange part along the second direction Y, the heat exchange area can be increased, the temperature difference of the battery assembly can be balanced, and the temperature uniformity of the battery assembly can be improved.

[0061] In some embodiments, the battery further includes: a box assembly and a battery assembly, the box assembly includes an integrally stamped box body, the box body includes a bottom wall and a surrounding wall, the battery assembly is disposed in the box body, and the battery assembly includes multiple battery cells.

[0062] In the above technical solution, because the bottom wall and surrounding wall of the box body are integrally stamped, there is no need to consider sealing issues at the junction between the bottom wall and the surrounding wall, which can improve the sealing effect. This prevents muddy water from seeping into the box body through the junction and affecting the battery components, thereby improving battery reliability. Furthermore, the integrally stamped box body does not require splicing, which can improve production efficiency.

[0063] In some embodiments, the battery includes a thermostat, which includes at least one of a first thermostat, a second thermostat and a third thermostat, and at least one of the first thermostat, the second thermostat and the third thermostat forms a heat exchange tube, wherein the first thermostat is arranged outside the box body and is in contact with the outer wall of the box body; the second thermostat is arranged in the box assembly and is located between the battery assembly and the box assembly; the third thermostat is arranged in the box assembly and is located between two adjacent battery cells.

[0064] In the above technical solution, the battery cells may generate heat during operation, or need to be heated in a low-temperature environment to keep the battery cells within an appropriate temperature range. By providing a thermostat, the temperature of the battery cells can be regulated, thereby improving the stability of the battery cells and increasing the battery life.

[0065] In a second aspect, an embodiment of the present application further provides an electrical device including the above-mentioned battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 A schematic diagram of a vehicle provided in an embodiment of the present application;

[0067] Figure 2 An exploded view of a battery provided in accordance with some embodiments of the present application;

[0068] Figure 3 A schematic diagram of the structure of a heat exchange tube provided in some embodiments of the present application;

[0069] Figure 4 for Figure 3 Exploded view of the heat exchange tube shown;

[0070] Figure 5 for Figure 3 A schematic diagram of a portion of the structure of the heat exchange tube shown;

[0071] Figure 6 The bending section provided in the first embodiment of the present application is along Figure 5 Cross-sectional view in the direction indicated by line AA;

[0072] Figure 7 A cross-sectional view of a bending section provided in the second embodiment of the present application;

[0073] Figure 8A cross-sectional view of a bending section provided in the third embodiment of the present application;

[0074] Figure 9 A cross-sectional view of a bending section provided in a fourth embodiment of the present application;

[0075] Figure 10 The straight heat exchange section provided in the embodiment of the present application is along Figure 5 Cross-sectional view in the direction indicated by line BB;

[0076] Figure 11 A schematic diagram of a portion of the structure of a battery provided in some embodiments of the present application;

[0077] Figure 12 A schematic diagram of a portion of the structure of a battery provided in some other embodiments of the present application;

[0078] Figure 13 A schematic diagram of a portion of the structure of a battery provided in some embodiments of the present application;

[0079] Figure 14 A partial cross-sectional view of a battery provided in some embodiments of the present application;

[0080] Figure 15 An exploded view of a portion of a battery provided in some embodiments of the present application;

[0081] Figure 16 An assembly diagram of the partial components of a battery provided in some embodiments of the present application.

[0082] Reference numerals:

[0083] Vehicle 1; Battery 1000; Controller 2000; Motor 3000;

[0084] Battery assembly 200; battery cell 210; box assembly 300; box body 310; bottom wall 311; surrounding wall 312; box cover 320; expansion beam 330; bottom guard plate 340;

[0085] Heat exchange element 100; first temperature adjustment element 110; second temperature adjustment element 120; third temperature adjustment element 130;

[0086] Heat exchange tube 10; first heat exchange tube 102; second heat exchange tube 103; straight heat exchange section 11; bent section 12; wall 121; sub-channel 13; first sub-channel 131; second sub-channel 132;

[0087] First reinforcement member 20; first reinforcement rib 21;

[0088] Second reinforcement member 30; second reinforcement rib 31;

[0089] Connector 40;

[0090] U-shaped region 50; first heat exchange channel 51; first heat exchange portion 511; second heat exchange channel 52; second heat exchange portion 521; third heat exchange portion 522; fourth heat exchange portion 523; third heat exchange channel 53;

[0091] First direction X; second direction Y; third direction Z. DETAILED DESCRIPTION

[0092] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0093] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0094] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0095] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0096] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0097] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0098] The term "plurality" used in this application refers to two or more (including two).

[0099] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0100] It is understood that the temperature environment within the battery is affected by external weather conditions. The battery cells within the battery need to be within a certain temperature range during operation. When the temperature within the battery exceeds or falls below this range, the stability and performance of the battery will be significantly affected. For example, in hot weather, the battery cells need to be cooled and dissipated to keep the temperature within the required range. In cold weather, the battery cells need to be heated to keep the temperature within the required range.

[0101] Heat exchange components can be used to circulate heat exchange media and perform heat exchange with components to be exchanged, such as batteries, so that the heat or cold of the heat exchange medium is transferred to the components to be exchanged, realizing heat exchange with the components to be exchanged, thereby heating or cooling the components to be exchanged, achieving temperature regulation, and allowing the components to be exchanged to be in a more suitable temperature range.

[0102] The structural strength of the heat exchange tubes in a heat exchange component significantly impacts its service life and the risk of airtight failure. For example, in battery applications, weak heat exchange tubes can lead to insufficient pressure-bearing capacity. External forces such as the weight of the battery assembly, the expansion of battery cells, and external impacts can easily cause structural deformation and damage, leading to airtight failure, reduced heat transfer capacity, and even leakage of the heat exchange medium. Therefore, improving the structural strength of heat exchange tubes has become a key research and development area in this field.

[0103] Especially for heat exchange tubes with bent structures, the bent areas of the heat exchange tubes are prone to collapse, wrinkling and other adverse conditions during the bending process, which affects the structural strength and airtight reliability of the heat exchange tubes.

[0104] Some related technologies attempt to mitigate collapse and wrinkling by filling the heat exchange tubes with fillers such as corundum, ice, and pull-out mandrels during the bending process. However, these fillers require sealing, freezing, and pulling, increasing the complexity and time involved in the process. Furthermore, the fillers must be removed after bending, leaving the heat exchange tubes at risk of collapse and deformation.

[0105] Based on this, the present application proposes a heat exchange tube, comprising: multiple straight heat exchange sections and at least one bent section, the multiple straight heat exchange sections are arranged at intervals, and at least one bent section sequentially connects and connects the multiple straight heat exchange sections; wherein, a first reinforcement is provided in at least one bent section.

[0106] In the heat exchange tube of the above-mentioned structure, multiple straight heat exchange sections are connected in sequence through the bending section, and a first reinforcement is provided in the bending section, which can increase the heat exchange area of the heat exchange tube, improve the heat exchange performance, and improve the undesirable conditions such as collapse, wrinkling, and excessive thinness during the forming process of the bending section, improve the structural strength of the bending section, and make the heat exchange tube have stronger pressure resistance during the heat exchange process, which is conducive to improving the service life.

[0107] The heat exchange tube disclosed in the embodiments of the present application can be used in electrical devices that use batteries as power sources or various energy storage systems that use batteries as energy storage elements. The electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery-powered vehicles, electric vehicles, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0108] For the convenience of description, the following embodiments are described by taking a vehicle 1 as an example of an electrical device according to an embodiment of the present application.

[0109] Reference Figure 1 , Figure 1 Schematic diagram of vehicle 1 provided for some embodiments of the present application. Vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1000 is provided inside the vehicle 1. The battery 1000 can be provided at the bottom, head or tail of the vehicle 1. The battery 1000 can be used to power the vehicle 1. For example, the battery 1000 can serve as an operating power source for the vehicle 1. The vehicle 1 can also include a controller 2000 and a motor 3000. The controller 2000 is used to control the battery 1000 to power the motor 3000, for example, for starting, navigating and operating power requirements of the vehicle 1 during driving.

[0110] In some embodiments of the present application, the battery 1000 can serve not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0111] Reference Figure 2 , Figure 2 This is an exploded view of a battery 1000 according to some embodiments of the present application. The battery 1000 includes a case assembly 300, a battery cell 210, and a heat exchanger 100. The case assembly 300 has a receiving cavity, and the battery cell 210 is received in the receiving cavity of the case assembly 300. The heat exchanger 100 can be disposed between the battery cell 210 and the case assembly 300, or between adjacent battery cells 210.

[0112] The housing assembly 300 is used to provide storage space for the battery cells 210. The housing assembly 300 can have various structures. In some embodiments, the housing assembly 300 can include a first portion (e.g., the housing body 310 described below) and a second portion (e.g., the housing cover 320 described below). The first and second portions overlap, and together they define a storage space for the battery cells 210. The second portion can be a hollow structure with one end open, and the first portion can be a plate-like structure. The first portion overlaps the open side of the second portion, so that the first and second portions together define the storage space. Alternatively, both the first and second portions can be hollow structures with one end open, with the open side of the first portion overlapping the open side of the second portion. Of course, the housing assembly 300 formed by the first and second portions can have various shapes, such as a cylinder, a rectangular parallelepiped, etc. Optionally, in some embodiments, the housing assembly 300 also includes a bottom guard plate 340, which is located on the underside of the housing body 310 to further enhance the bearing strength and impact resistance of the bottom of the housing body 310. The bottom guard plate 340 may be made of various materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0113] In the battery 1000, there may be multiple battery cells 210, and the multiple battery cells 210 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 210. The multiple battery cells 210 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 210 may be housed within the housing assembly 300. Of course, the battery 1000 may also be a battery module formed by first connecting multiple battery cells 210 in series, in parallel, or in a hybrid connection, and then the multiple battery modules are further connected in series, in parallel, or in a hybrid connection to form an entire battery cell, which is then housed within the housing assembly 300. The battery 1000 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 210.

[0114] Each battery cell 210 may be a secondary battery or a primary battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 210 may be cylindrical, flat, rectangular, or in other shapes.

[0115] In the battery 1000, the heat exchange element 100 can be disposed between the multiple battery cells 210 and the top wall of the box assembly 300, between the multiple battery cells 210 and the bottom wall of the box assembly 300, between the bottom wall of the box assembly 300 and the bottom guard plate 340, or between two adjacent battery cells 210, providing heat exchange for the multiple battery cells 210. In some embodiments, the heat exchange element 100 can include a heat exchange tube 10 and a current collector. The heat exchange tube 10 is connected to the current collector and can be a flat tube, a round tube, a harmonica tube, or other shaped tube. The current collector can be a rectangular tube, a round tube, or the like.

[0116] Hereinafter, a heat exchange tube 10 according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0117] Please refer to Figure 3-Figure 9 , Figure 3 and Figure 4 A schematic structural diagram of a heat exchange tube 10 provided in some embodiments of the present application; Figure 5 for Figure 3 A schematic diagram of a portion of the structure of the heat exchange tube 10 is shown; Figure 6-Figure 9 The cross-sectional view of the bent section 12 of the heat exchange tube 10 provided in different embodiments of the present application. The heat exchange tube 10 includes: a plurality of straight heat exchange sections 11 and at least one bent section 12.

[0118] Specifically, a plurality of straight heat exchange sections 11 are arranged at intervals, and at least one bent section 12 sequentially connects and communicates the plurality of straight heat exchange sections 11. A first reinforcement member 20 is provided in at least one bent section 12.

[0119] The heat exchange tube 10 is a tubular structure capable of traversing a medium and defining a flow path, such as a circular tube, rectangular tube, or elliptical tube. The heat exchange tube 10 can be made of a material with excellent thermal conductivity, such as a metal, specifically aluminum or copper. For example, the heat exchange tube 10 can be an aluminum tube. A straight heat exchange section 11 is a heat exchange section extending along a straight line, while a curved section 12 is a heat exchange section extending along a broken line or curve.

[0120] Multiple straight heat exchange segments 11 are sequentially connected and interconnected by at least one bent segment 12 arranged at intervals. This means that the channels within the straight heat exchange segments 11 are not directly interconnected, but are indirectly interconnected via the bent segments 12. Spatially, the straight heat exchange segments 11 may be spaced apart or in contact with each other, and this is all within the scope of protection of this application.

[0121] By connecting the straight heat exchange section 11 with the bending section 12, the direction of the heat exchange tube 10 extending from the inlet to the outlet can be reversed, so that the heat exchange tube 10 can cover a larger area within a certain spatial range, thereby increasing the heat exchange area with the component to be heat exchanged, increasing the heat exchange efficiency and improving the temperature uniformity of the component to be heat exchanged.

[0122] In an embodiment where there are multiple straight heat exchange sections 11, the extension directions of the multiple straight heat exchange sections 11 can be the same or different, and the extension lengths can be the same or different; in an embodiment where there are multiple bending sections 12, the shapes, bending directions and bending angles of the multiple bending sections 12 can be the same or different, as long as the extension path of the heat exchange tube 10 can be reversed, which is within the scope of protection of the present application.

[0123] In the present application, the forming process of the heat exchange tube 10 is not limited. For example, it can be extruded, or formed by bending sheet metal and fixed by welding, etc. The straight heat exchange section 11 and the bent section 12 can be integrally formed, or they can be formed separately and then spliced together. The forming processes of the straight heat exchange section 11 and the bent section 12 can be the same or different.

[0124] The first reinforcement member 20 can be made of a material with a certain strength, such as stainless steel, composite materials, or multilayer materials. The structure of the first reinforcement member 20 can be flexibly configured according to actual conditions. For example, the first reinforcement member 20 can include a plate that fits against the sidewalls of the bent section 12; for example, the first reinforcement member 20 can include ribs connecting opposite sidewalls; etc.

[0125] A first reinforcement member 20 is provided in at least one bending section 12. In an embodiment where there is one bending section 12, the first reinforcement member 20 is provided in the bending section 12; in an embodiment where there are multiple bending sections 12, the first reinforcement member 20 may be provided in one bending section 12, or in multiple or all bending sections 12.

[0126] During the bending process of the bending section 12, material accumulation will occur in the area near the inner edge of the bend (such as the edge of the side of the arc-shaped bending section 12 close to the center of the circle), which is prone to wrinkling or even collapse, thereby reducing the flow area inside the bending section 12 and the structural strength of the bending section 12; the area near the outer edge of the bend (such as the edge of the side of the arc-shaped bending section 12 away from the center of the circle) will be stretched and thinned, which is easy to reduce the compressive strength and corrosion resistance of the outer wall edge, and easily cause the flow space inside the bending section 12 to become flattened, increasing the flow resistance.

[0127] In the present application, the first reinforcement 20 can enhance the structural strength of the bent section 12, making it less susceptible to large-scale wrinkling, deformation, collapse, and thinning during the bending process. This allows the bent section 12 to possess improved pressure resistance and corrosion resistance. Furthermore, during the heat exchange process of the heat exchange tube 10, the first reinforcement 20 can further enhance the overall pressure resistance of the heat exchange tube 10, thereby increasing its overall structural strength and service life. Furthermore, by reducing defects such as wrinkling, deformation, and collapse in the bent section 12, the contact area between the heat exchange tube 10 and the component to be heat exchanged, such as the battery 1000, is increased, thereby improving the heat exchange area and heat exchange effect, and enhancing the reliability of the battery 1000.

[0128] For example, in a heat exchange tube 10 according to a specific embodiment of the present application, multiple bent sections 12 sequentially connect and communicate multiple straight heat exchange tubes 10. The bent sections 12 have a radial width of 23 mm and a thickness perpendicular to the radial direction of 6 mm. A first reinforcement member 20 is provided within the bent sections 12. The difference between the comparative example and the present embodiment is that the first reinforcement member 20 is not provided within the bent sections 12. Testing shows that the heat exchange tube 10 in the comparative example withstands a pressure of 200 kPa, while the heat exchange tube 10 in the present embodiment withstands a pressure of 2000 kPa. The provision of the first reinforcement member 20 significantly improves the pressure resistance of the heat exchange tube 10.

[0129] According to the heat exchange tube 10 of the embodiment of the present application, a plurality of straight heat exchange sections 11 are sequentially connected and communicated through the bending section 12, and a first reinforcement member 20 is provided in the bending section 12. This can improve undesirable conditions such as collapse, wrinkling, and excessive thinness during the forming process of the bending section 12, thereby improving the structural strength of the bending section 12, so that the heat exchange tube 10 has a stronger pressure resistance during the heat exchange application process, which is beneficial to improving the service life. In addition, reducing undesirable conditions can increase the contact heat exchange area between the heat exchange tube 10 and the component to be heat exchanged, thereby improving the heat exchange efficiency.

[0130] According to some embodiments of the present application, a first reinforcement member 20 is provided in each bending section 12. This prevents large-scale wrinkling and collapse from occurring during the bending process of each bending section 12, thereby improving the overall pressure resistance and heat exchange area of the heat exchange tube 10.

[0131] According to some embodiments of the present application, Figure 6-Figure 9 As shown, the bending section 12 includes two opposing walls 121, and the first reinforcement member 20 connects the opposing walls 121. This improves the positional stability of the first reinforcement member 20 within the bending section 12, and prevents displacement during the bending process and heat exchange process, thereby affecting the structural reinforcement effect.

[0132] In some specific embodiments, at least one wall 121 connected to the first reinforcement 20 faces the component to be heat exchanged, so that the heat exchange tube 10 can play a certain supporting role during the heat exchange process with the component to be heat exchanged, thereby further improving the structural stability of the heat exchange tube 10.

[0133] In some specific embodiments, Figure 6-Figure 9 As shown, the wall surface 121 is flat. A flat surface helps increase the heat exchange area between the heat exchange tube 10 and the component being heat exchanged, improving heat exchange efficiency. It also facilitates the connection between the first reinforcement 20 and the wall surface 121, reducing the difficulty of connection. It is worth noting that due to factors such as the processing technology, the wall surface 121 of the heat exchange tube 10 produced is not absolutely flat and may have some negligible defects such as deformation, pits, and small protrusions.

[0134] According to some embodiments of the present application, Figure 6-Figure 9 As shown, the first reinforcement member 20 includes a plurality of first reinforcement ribs 21. The plurality of first reinforcement ribs 21 are arranged at intervals along the bending radius of the bending section 12, and divide the heat exchange flow channel within the bending section 12 into a plurality of sub-flow channels 13. During the bending process, wrinkling is prone to occur in the area near the inner edge of the bending section 12. This wrinkling phenomenon can be sequentially blocked by the plurality of first reinforcement ribs 21 radially outward, resulting in the most severe wrinkling on the inner side of the first first reinforcement rib 21 from the inside out (although the degree of wrinkling is less than if the first reinforcement member 20 is not provided), slight wrinkling between the first and second first reinforcement ribs 21, and almost no wrinkling between the second and third first reinforcement ribs 21. Therefore, the plurality of first reinforcement ribs 21 arranged at intervals along the radial direction can greatly reduce the wrinkling area and effectively support the bending section 12 in different radial regions, reducing the thinning rate of the plate near the radial outer edge, thereby greatly improving the structural strength of the bending section 12 and reducing the risk of collapse, deformation, and cracking.

[0135] In some embodiments, as Figure 6 and Figure 8 As shown, the first reinforcing rib 21 extends perpendicular to the wall surface 121. For example, the first reinforcing rib 21 extends in the up-down direction (eg Figure 6 The first reinforcing rib 21 is perpendicular to the wall surface 121, so that the height of the first reinforcing rib 21 is smaller, the space occupied is smaller, which is conducive to reducing the flow resistance, and the first reinforcing rib 21 has a better support effect on the wall surface 121 in the height direction.

[0136] In some embodiments, as Figure 7 and Figure 9As shown, the first reinforcing ribs 21 extend obliquely relative to the wall surface 121. As a result, the radial width of at least one of the upper sidewall and the lower sidewall of the radially innermost and radially outermost sub-channels 13 can be reduced, thereby improving the supporting effect of the two first reinforcing ribs 21 at the radially innermost and radially outermost ends on the wall surface 121. For example Figure 7 The first reinforcing rib 21 shown is inclined downward and forward from top to bottom, and the width of the lower side wall of the radially innermost sub-channel 13 is reduced to improve the support effect, and the width of the upper side wall is larger to increase the stacking space, reducing the blocking effect of the first reinforcing rib 21 affected by excessive stacking after extrusion and wrinkling; the width of the upper side wall of the radially outermost sub-channel 13 is reduced to improve the support effect on the thinning area, and the width of the lower side wall is larger to meet the demand for reducing flow resistance.

[0137] In some embodiments, as Figure 7 As shown, the inclination directions of the plurality of first reinforcing ribs 21 are the same, which is effective in reducing the difficulty of forming the plurality of first reinforcing ribs 21 .

[0138] In some embodiments, as Figure 9 As shown, in the direction of the bending radius of the bend section 12, the first reinforcing ribs 21 located on either side of the midpoint of the bend section 12 have opposite inclinations, while the first reinforcing ribs 21 located on the same side of the midpoint of the bend section 12 have the same inclination. The two first reinforcing ribs 21 adjacent to the midpoint of the bend section 12 cooperate with the side walls 121 to form a trapezoidal or arched structure, which helps improve the compressive strength near the midpoint of the bend section 12 and prevents deformation. Furthermore, given a constant width of the bend section 12, this helps reduce the number of first reinforcing ribs 21 required, thereby lowering overall flow resistance.

[0139] In addition, in some specific embodiments, Figure 9 As shown, the two side walls 121 include a first wall facing the component to be heat exchanged and a second wall facing away from the component to be heat exchanged. From the first wall to the second wall, the first reinforcing ribs 21 are inclined close to the midpoint of the bending section 12. In other words, the end with the larger distance between the two first reinforcing ribs 21 (such as Figure 9 The upper end as shown is close to the component to be heat exchanged and the end with a smaller spacing is far away from the component to be heat exchanged, which is beneficial to increasing the heat exchange area between the middle sub-channel 13 and the component to be heat exchanged and improving the heat exchange effect.

[0140] According to some embodiments of the present application, Figure 6-Figure 7 As shown, the plurality of first reinforcing ribs 21 are arranged at equal intervals, which can reduce the difficulty of forming the plurality of first reinforcing ribs 21 and make the flow resistance of different sub-channels 13 more uniform.

[0141] According to some embodiments of the present application, Figure 8-Figure 9As shown, in the direction of the bending radius of the bend section 12, the width of the sub-channel 13 near the center is greater than that of the sub-channel 13 near the edge. In other words, the first reinforcing ribs 21 near the edge are denser than those near the center. For example, the width of the sub-channel 13 gradually decreases from the center to the outermost sub-channel 13; or the width of the sub-channel 13 in the center is greater than the width of all other sub-channels 13; or the width of the sub-channel 13 at the outermost edge is smaller than the width of all other sub-channels 13. All of these are within the scope of protection of this application.

[0142] During the bending process of the bending section 12, the areas near the inner edge and the outer edge are more prone to wrinkling, deformation, thinning and other adverse problems. By arranging denser first reinforcing ribs 21 in the area near the edge, it is beneficial to improve the structural reinforcement effect of the bending section 12 and improve the anti-extrusion ability; by arranging sparser first reinforcing ribs 21 in the area near the middle, the number of required first reinforcing ribs 21 can be reduced, the space occupied by the first reinforcement 20 in the bending section 12 can be reduced, the overall flow resistance in the bending section 12 can be reduced, and the heat exchange effect can be improved.

[0143] According to some embodiments of the present application, Figure 5 As shown, the inner edge bending diameter of the bend section 12 is R, and the width of the bend section 12 along the bending radius is D, where R is greater than or equal to D. If the inner edge bending diameter of the bend section 12 is too small, the area near the inner edge will be overly packed, and the area near the outer edge will be too thin. This will place excessive demands on the first reinforcement member 20, for example, requiring an excessive number of first reinforcement ribs 21, which will significantly reduce the flow resistance. However, within the above ratio range, the first reinforcement member 20 can be used to strengthen the strength of the bend section 12 without causing excessive flow resistance, thus ensuring both service life and heat exchange capacity.

[0144] In addition, if the inner edge bending diameter of the bending section 12 is too large, the area covered by the heat exchange tube 10 within a certain space range will be too small, resulting in too small a heat exchange area and reduced heat exchange capacity. Figure 5 and Figure 8 As shown, the inner edge of the bending section 12 has a bending diameter of R, and the width of the bending section 12 along the bending radius is D. The R / D ratio is 1 to 3, which not only improves the structural reinforcement effect but also meets the heat exchange capacity requirements. For example, in some specific embodiments, the R / D ratio is 1, 1.5, 2, 2.5, 3, etc.

[0145] Moreover, in the direction of the bending radius of the bending section 12, the sub-channel 13 located in the middle is the first sub-channel 131, and multiple second sub-channels 132 are provided on both sides of the first sub-channel 131. The widths of the multiple second sub-channels 132 are equal, and the width of the first sub-channel 131 is greater than the width of the second sub-channel 132.

[0146] The first sub-channel 131 has a larger width to reduce the number of required first reinforcing ribs 21 and reduce flow resistance; multiple second sub-channels 132 with smaller widths can effectively reduce the diffusion of defects such as wrinkling and thinning on the inner and outer edges to the middle, reduce the generation of defects and limit the defects to a smaller radial range, effectively improving the anti-extrusion ability and heat exchange capacity.

[0147] In some embodiments of the present application, Figure 6-Figure 9 As shown, the maximum width of at least two sub-channels 13 near the edge is L, and the bending section 12 is perpendicular to the bending plane (such as Figure 6 The thickness in the third direction (Z, i.e., the vertical direction) is H. The ratio H / L is 0.2 to 3. A ratio too small can result in excessive spacing between the first reinforcing ribs 21, increasing wrinkling, or in too small a thickness of the sub-flow channel 13, resulting in excessive flow resistance. A ratio too large can result in too dense a spacing between the first reinforcing ribs 21, resulting in excessive flow resistance. Within this range, the dual requirements of reducing wrinkling and collapse and reducing flow resistance are met.

[0148] In some embodiments, H / L can be 0.8 to 1.2, which can further enhance the structural reinforcement effect, improve wrinkling and collapse issues, and reduce flow resistance. For example, in some specific embodiments, H / L can be 0.8, 1.9, 1.0, 1.1, and 1.2. When H / L equals 1, the cross-section of the sub-channel 13 is close to a square, the force is more uniform, and the thinning and thickening are more uniform.

[0149] In some embodiments of the present application, Figure 6-Figure 9 As shown, multiple first reinforcing ribs 21 are arranged symmetrically or centrally about the midpoint of the bend section 12. This ensures more uniform force distribution on both sides of the radial midpoint of the bend section 12, resulting in more uniform thinning and thickening. Furthermore, during production, the tube body can be bent clockwise or counterclockwise, meaning that either side of the widthwise edge of the tube body can form the inner edge of the bend section 12, improving production efficiency.

[0150] According to some embodiments of the present application, Figure 10 The figure shows a cross-sectional view of the straight heat exchange section 11 of the heat exchange tube 10 provided in an embodiment of the present application, in which a second reinforcement member 30 is provided. The second reinforcement member 30 can improve the structural strength of the straight heat exchange section 11, thereby further improving the overall strength of the heat exchange tube 10 and enhancing its pressure resistance.

[0151] In some embodiments, continue to refer to Figure 10As shown, the second reinforcement member 30 includes a second reinforcement rib 31. The second reinforcement rib 31 is located in the middle of the straight heat exchange section 11 in the width direction of the straight heat exchange section 11. Since the straight heat exchange section 11 does not require bending, it does not suffer from wrinkling or collapse caused by bending. Therefore, by providing fewer second reinforcement ribs 31, the strength requirements can be met while reducing the flow resistance of the heat exchange medium in the straight heat exchange section 11, which is conducive to improving the heat exchange effect.

[0152] In other embodiments, the first reinforcement member 20 includes a plurality of first reinforcement ribs 21 spaced apart along the bending radius of the bend section 12, and the second reinforcement member 30 includes a plurality of second reinforcement ribs 31, which are arranged in a one-to-one correspondence with and connected to the first reinforcement ribs 21. Thus, the heat exchange medium in the plurality of sub-channels 13 in the bend section 12 can flow smoothly into the straight heat exchange section 11 under the guidance of the first reinforcement ribs 21 and the second reinforcement ribs 31. Furthermore, in the embodiment in which the straight heat exchange section 11 and the bend section 12 are integrally formed, the first reinforcement rib 21 and the connected second reinforcement ribs 31 can be integrally formed, that is, the heat exchange tube 10 can be formed into the straight heat exchange section 11 and the bend section 12 by bending a single tube. The length of each straight heat exchange section 11 and the bend section 12 is more flexible and is not restricted by the internal first reinforcement ribs 21 and the second reinforcement ribs 31, which is conducive to improving production efficiency.

[0153] In some embodiments of the present application, Figure 3-Figure 5 As shown, the heat exchange tube 10 is formed by bending a single tube, eliminating the assembly process between the straight heat exchange section 11 and the bent section 12, improving production efficiency. It also eliminates the need for splicing and sealing, which helps reduce the risk of seal failure. Furthermore, in some embodiments where both the first reinforcement 20 and the second reinforcement 30 are provided, the cross-sectional shapes of the first reinforcement 20 and the second reinforcement 30 perpendicular to the extension path of the heat exchange tube 10 can be identical, allowing the first reinforcement 20 and the second reinforcement 30 to be bent together, thereby reducing the processing difficulty of the heat exchange tube 10.

[0154] In other embodiments of the present application, each straight heat exchange section 11 can be formed individually by a single tube, and each bent section 12 can be formed by bending a single tube. The straight heat exchange section 11 and the bent section 12 are spliced and sealed and connected, for example, by a sleeve being sleeved on the end of the straight heat exchange section 11 and the end of the bent section 12 to achieve connection, which is beneficial to improving the sealing reliability, and the sleeve installation is not interfered with by the first reinforcement structure. The reinforcement structures in the split straight heat exchange section 11 and the bent section 12 do not interfere with each other, and can be the same or different, and the setting is more flexible and changeable.

[0155] In some embodiments, as Figure 3 and Figure 6As shown, the heat exchange tube 10 is a flat tube. In other words, the size of the heat exchange tube 10 is different in at least two directions perpendicular to the extension path of the heat exchange tube 10. For example Figure 6 As shown, the thickness of the heat exchange tube 10 in the vertical direction is smaller than the width in the horizontal direction, forming a flat tube.

[0156] In some embodiments of the present application, Figure 6-Figure 9 As shown, the bent section 12 and the first reinforcement member 20 are integrally formed. For example, they can be formed integrally by extrusion. This integral molding eliminates the need to install the first reinforcement member 20 in the relatively small space within the bent section 12, improving production efficiency. Furthermore, the first reinforcement member 20 is securely connected to the bent section 12, preventing relative movement during the bending process that could affect the reinforcement effect.

[0157] According to some embodiments of the present application, Figure 1-Figure 5 As shown, the straight heat exchange section 11 is along the first direction X (eg Figure 5 The plurality of straight heat exchange sections 11 extend in the second direction Y (e.g. Figure 5 The heat exchange sections 11 are arranged in a spaced relationship (in the left and right directions shown), with the first direction X and the second direction Y being perpendicular. A curved section 12 connects the two spaced-apart straight heat exchange sections 11 and is semicircular in shape. The orderly arrangement of the multiple straight heat exchange sections 11 further increases the occupied space in both the first direction X and the second direction Y, thereby increasing the heat exchange area and improving heat exchange capacity.

[0158] In a specific embodiment, Figure 5 As shown, among any three adjacent straight heat exchange sections 11 along the second direction Y, the first end of the middle straight heat exchange section 11 is connected to the first end of one of the adjacent straight heat exchange sections 11 through a bending section 12, and the second end of the middle straight heat exchange section 11 is connected to the second end of another adjacent straight heat exchange section 11 through a bending section 12.

[0159] Thus, from one end in the second direction Y to the other end, the entire heat exchange tube 10 is formed into a serpentine tube extending back and forth along the first direction X, which has a better effect of increasing the heat exchange area, and the specifications of the required straight heat exchange section 11 and the bent section 12 are relatively simple, and each bent section 12 is not easily interfered with by the position of other straight heat exchange sections 11 and bent sections 12 during the bending process, thereby improving production efficiency.

[0160] According to some embodiments of the present application, Figure 11 As shown, Figure 11A partial structural diagram of a battery 1000 according to some embodiments of the present application. At least two straight heat exchange sections 11 extend at an angle, and a curved section 12 is arc-shaped and connects the two straight heat exchange sections 11 at the angle. By changing the bending angle of the curved section 12, the angle between two adjacent straight heat exchange sections 11 can be changed, thereby making the extension path of the heat exchange tube 10 more flexible and varied. For example, if the bending angle of the curved section 12 is 90°, the corresponding two connected straight heat exchange sections 11 can be parallel to each other.

[0161] According to some embodiments of the present application, Figure 11 As shown, the heat exchange tube 10 includes a first heat exchange tube 102, and the first heat exchange tube 102 includes a first heat exchange channel 51 and a second heat exchange channel 52; the second heat exchange channel 52 is bent to form a U-shaped area 50, and the first heat exchange channel 51 is bent and arranged in the U-shaped area 50, and is bent and connected to the second heat exchange channel 52, for example, by a bending section 12.

[0162] Specifically, the battery 1000 may include multiple battery cells 210 , and the first heat exchange tube 102 is used to exchange heat with the multiple battery cells 210 of the battery 1000 , so that the temperature of the battery 1000 can be limited to a safe operating temperature, thereby improving the operating reliability of the battery 1000 .

[0163] Among them, the above-mentioned "the second heat exchange channel 52 is bent to form a U-shaped area 50, and the first heat exchange channel 51 is bent and arranged in the U-shaped area 50" is intended to explain that the second heat exchange channel 52 is arranged on the circumferential periphery of the first heat exchange channel 51, and can be arranged on the three circumferential sides of the first heat exchange channel 51. The second heat exchange channel 52 can be arranged closer to the peripheral position of the battery 1000 relative to the first heat exchange channel 51.

[0164] The second heat exchange channel 52 is bent to form a U-shaped area 50 , that is, in the direction from one end of the second heat exchange channel 52 toward the other end, the second heat exchange channel 52 extends along the U-shaped line to form the U-shaped area 50 .

[0165] The first heat exchange channel 51 is bent and arranged in the U-shaped area 50, that is, the first heat exchange channel 51 is arranged in the space enclosed by the second heat exchange channel 52, and the first heat exchange channel 51 extends along a non-straight line on the inner side of the second heat exchange channel 52 and has at least one bending position.

[0166] It should be noted that, in this embodiment, only the first heat exchange channel 51 is limited to be bent in the U-shaped area 50, and the bending form of the first heat exchange channel 51 is not limited. That is, the specific bending form of the first heat exchange channel 51 can be designed according to the heat exchange requirements of the battery 1000. For example, the first heat exchange channel 51 can be along the length direction of the battery cell 210 (that is, Figure 11and extends in the second direction Y) and, after extending to a certain length, extends toward the width direction of the battery cell 210 (i.e. Figure 11 Alternatively, the first heat exchange channel 51 may extend along the width direction of the battery cell 210, and bend toward the length direction of the battery cell 210 after extending to a certain length, and then continue to extend along the width direction of the battery cell 210 and bend along the length direction.

[0167] The first heat exchange channel 51 and the second heat exchange channel 52 are connected in a bent manner, that is, one end of the first heat exchange channel 51 is connected to one end of the second heat exchange channel 52, and the connection position between the first heat exchange channel 51 and the second heat exchange channel 52 is a bent non-linear structure. For example, the connection position between the first heat exchange channel 51 and the second heat exchange channel 52 can be bent into an arc segment.

[0168] Among them, the first heat exchange channel 51 and the second heat exchange channel 52 are connected, so that one of the end of the first heat exchange channel 51 away from the second heat exchange channel 52 and the end of the second heat exchange channel 52 away from the first heat exchange channel 51 can be used as the liquid inlet end and the other can be used as the liquid outlet end. Therefore, when the first heat exchange tube 102 is exchanging heat, the heat exchange medium can flow from the first heat exchange channel 51 to the second heat exchange channel 52, or from the second heat exchange channel 52 to the first heat exchange channel 51.

[0169] It is understandable that as the heat exchange medium flows through the first heat exchange tube 102, the temperature of the heat exchange medium gradually changes, resulting in a gradual decrease in the heat exchange effect. For example, when the heat exchange tube 10 cools the battery assembly 200, the heat from the battery cells 210 is gradually transferred to the heat exchange medium, causing the temperature of the heat exchange medium to gradually increase as it flows along the first heat exchange tube 102, the temperature difference between the heat exchange medium and the battery cells 210 gradually decreases, and the heat exchange efficiency gradually decreases. When the heat exchange tube 10 heats the battery assembly 200, the heat in the heat exchange medium is gradually transferred to the battery cells 210, causing the temperature of the heat exchange medium to gradually decrease as it flows along the first heat exchange tube 102, the temperature difference between the heat exchange medium and the battery cells 210 gradually decreases, and the heat exchange efficiency gradually decreases.

[0170] In this embodiment, when the heat exchange tube 10 is dissipating heat and cooling the battery assembly 200, the heat exchange medium can also flow from the first heat exchange channel 51 to the second heat exchange channel 52, but the heat exchange medium can also flow from the second heat exchange channel 52 to the first heat exchange channel 51. When the heat exchange medium flows from the first heat exchange channel 51 to the second heat exchange channel 52, the battery cells 210 in the middle of the battery 1000 (that is, the internal battery cells 210 on the inner side of the periphery) can be cooled first, and then the battery cells 210 at the peripheral edge of the battery 1000 can be cooled. Since the heat dissipation of the battery cells 210 at the peripheral edge of the battery 1000 is better than that of the internal battery cells 210, the heat exchange medium with a lower temperature in the first heat exchange channel 51 can better meet the heat dissipation requirements of the battery cells 210 in the middle of the battery 1000. At the same time, due to The battery cells 210 at the peripheral position can dissipate heat naturally directly to the external environment. When the temperature of the heat exchange medium in the second heat exchange channel 52 is slightly higher, it can still meet the heat dissipation needs of the peripheral battery cells 210, so that the cooling effects obtained by the battery cells 210 at the peripheral position of the battery 1000 and the battery cells 210 at the middle position of the battery 1000 are roughly the same, and the temperatures of the battery cells 210 at the peripheral position of the battery 1000 and the battery cells 210 at the middle position of the battery 1000 after cooling and heat dissipation are relatively consistent, making the temperature distribution inside the battery 1000 more uniform.

[0171] When the heat exchange tube 10 heats the battery assembly 200, the heat exchange medium can also flow from the first heat exchange channel 51 to the second heat exchange channel 52, but the heat exchange medium can also flow from the second heat exchange channel 52 to the first heat exchange channel 51. For example, when the heat exchange medium flows from the second heat exchange channel 52 to the first heat exchange channel 51, the battery cells 210 on the periphery of the battery assembly 200 can be heated first, and then the heat exchange medium heats the battery cells 210 in the middle of the battery assembly 200. Since the battery cells 210 on the periphery of the battery 1000 dissipate more heat to the external environment, the temperature of the battery cells 210 on the periphery of the battery 1000 is more likely to drop. The heat exchange medium first heats the battery cells 210 on the periphery of the battery 1000. The higher temperature heat exchange medium can increase the temperature of the battery cells 210 on the periphery while compensating for the heat lost by the battery cells 210 due to heat dissipation to the external environment. To meet its heating needs, the battery cells 210 in the middle of the battery assembly 200 have less contact area with the external environment and less heat loss. The lower temperature heat exchange medium flowing in the first heat exchange channel 51 can cooperate with the heat generated by the battery cells 210 themselves to meet its heating needs well. As a result, the heating effects obtained by the battery cells 210 on the periphery of the battery 1000 and the battery cells 210 in the middle of the battery assembly 200 are basically the same, and the temperatures of the battery cells 210 on the periphery of the battery 1000 and the battery cells 210 in the middle of the battery assembly 200 after heating are relatively consistent, making the temperature distribution in the battery 1000 more uniform.

[0172] In the above embodiment, the second heat exchange channel 52 is bent to form a U-shaped area 50, and the first heat exchange channel 51 is bent and arranged in the U-shaped area 50. When the heat exchange tube 10 exchanges heat with the battery assembly 200, the U-shaped area 50 formed by the outer second heat exchange channel 52 can be opposite to the outer battery cell 210 of the battery, and the first heat exchange channel 51 in the U-shaped area 50 can be opposite to the internal battery cell 210, so that the heat exchange tube 10 can make up for the internal and external temperature difference caused by the heat exchange between the outer battery cell 210 and the environment, so that the heat exchange effect of the battery cell 210 outside the battery assembly 200 and the battery cell 210 inside the battery assembly 200 tends to be consistent, thereby improving the temperature uniformity of the battery 1000, thereby improving the service life of the battery 1000 to a certain extent.

[0173] According to some embodiments of the present application, Figure 11 As shown, the first heat exchange channel 51 may include a plurality of first heat exchange parts 511 , and the plurality of first heat exchange parts 511 are arranged at intervals and are bent and connected in sequence.

[0174] That is, the plurality of first heat exchange sections 511 are sequentially connected, and the connection between two connected first heat exchange sections 511 is bent. For example, the two connected first heat exchange sections 511 can be connected by a bent section 12. The number of first heat exchange sections 511 can be two, three, four, five, or more.

[0175] It should be noted that the first heat exchange portion 511 can have various shapes. For example, the first heat exchange portion 511 can be linear or curved. The first heat exchange portion 511 can also extend in various directions. For example, it can extend along the length or thickness of the battery cell 210. In this way, multiple first heat exchange portions 511 are connected in a series of bends, allowing the first heat exchange channel 51 to form an S-shaped, X-shaped, or V-shaped heat exchange channel.

[0176] In the above embodiment, on the one hand, by setting up multiple first heat exchange parts 511, the heat exchange area of the first heat exchange channel 51 can be increased, and then the heat exchange area of the first heat exchange tube 102 can be increased, thereby improving the heat exchange effect of the first heat exchange tube 102; on the other hand, since the internal battery cells 210 are wrapped by the external battery cells 210, the temperature difference between the internal battery cells 210 is not large. Therefore, by setting up multiple first heat exchange parts 511, the overall heat exchange effect can be improved while reducing the temperature difference between the internal and external battery cells 210.

[0177] According to some embodiments of the present application, Figure 11 As shown, a plurality of first heat exchange parts 511 are arranged at intervals along the second direction Y, and each first heat exchange part 511 extends linearly along the first direction X, and the first direction X and the second direction Y are arranged at an angle.

[0178] Here, “the first direction X and the second direction Y are arranged at an angle” is intended to explain that the first direction X and the second direction Y can be arranged perpendicularly or intersecting non-perpendicularly. For example, the first direction X and the second direction Y can be arranged at an angle of 30°, 60°, 80°, 120°, 150° or 170°. Figure 11 As shown, the first direction X is the thickness direction of the battery cell 210, and the second direction Y is the length direction of the battery cell 210. The first heat exchange portion 511 extends along the thickness direction of the battery cell 210 and is arranged at intervals along the length direction of the battery cell 210. In this way, multiple first heat exchange portions 511 are bent and connected to form an S-shaped heat exchange channel, which can realize heat exchange for multiple battery cells 210.

[0179] In the above embodiment, by setting the first heat exchange part 511 to extend straightly along the first direction X, the production difficulty of the first heat exchange part 511 can be reduced, and the production complexity of the first heat exchange tube 102 can be reduced. At the same time, the straight tube can also increase the flow rate of the heat exchange medium, thereby improving the heat exchange effect of the first heat exchange tube 102.

[0180] According to some embodiments of the present application, Figure 11 As shown, the second heat exchange channel 52 may include: a second heat exchange part 521, a third heat exchange part 522 and a fourth heat exchange part 523. The second heat exchange part 521 extends along the first side circumference of the first heat exchange channel 51, the third heat exchange part 522 is connected between the second heat exchange part 521 and the first heat exchange channel 51, and extends along the second side circumference of the first heat exchange channel 51. The first end of the third heat exchange part 522 is connected to the second heat exchange part 521 at an angle, and the second end of the third heat exchange part 522 is connected to the first heat exchange channel 51 at an angle; the fourth heat exchange part 523 is communicated with the second heat exchange part 521, is connected to the second heat exchange part 521 at an angle, and extends along the third side circumference of the first heat exchange channel 51.

[0181] It can be understood that the fourth heat exchange part 523 is connected to the end of the second heat exchange part 521 away from the third heat exchange part 522, the fourth heat exchange part 523, the second heat exchange part 521 and the third heat exchange part 522 are connected in sequence to form a U-shaped area 50, and the first heat exchange channel 51 is arranged in the U-shaped area 50 and is connected to the end of the third heat exchange part 522 away from the second heat exchange part 521.

[0182] The first end of the third heat exchange portion 522 is connected to the second heat exchange portion 521 at an angle. That is, the third heat exchange portion 522 is connected to the second heat exchange portion 521, and the third heat exchange portion 522 and the second heat exchange portion 521 are not collinear or parallel, but are arranged at an angle greater than 0° and less than 180°. For example, the third heat exchange portion 522 and the second heat exchange portion 521 can be connected at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0183] The second end of the third heat exchange portion 522 is connected to the first heat exchange channel 51 at an angle; that is, the second end of the third heat exchange portion 522 is connected to the second heat exchange portion 521, and the second end of the third heat exchange portion 522 is arranged at an angle greater than 0° and less than 180° to the first heat exchange channel 51. For example, the second end of the third heat exchange portion 522 is connected to the first heat exchange channel 51 at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0184] The fourth heat exchange portion 523 is in communication with the second heat exchange portion 521 and is connected to the second heat exchange portion 521 at an angle. That is, the fourth heat exchange portion 523 is connected to the second heat exchange portion 521 at an angle greater than 0° and less than 180°. For example, the fourth heat exchange portion 523 is connected to the second heat exchange portion 521 at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0185] It should be noted that this embodiment limits the second heat exchange channel 52 to be arranged on three sides of the circumference of the first heat exchange channel 51, and does not limit the specific positions of the second heat exchange part 521, the third heat exchange part 522 and the fourth heat exchange part 523 relative to the first heat exchange channel 51. Therefore, the specific positions of the second heat exchange part 521, the third heat exchange part 522 and the fourth heat exchange part 523 can be designed according to actual conditions. For example, if the second heat exchange part 521 can be arranged on one side of the first heat exchange channel 51 in the second direction Y, the third heat exchange part 522 and the fourth heat exchange part 523 are respectively arranged on both sides of the first heat exchange channel 51 in the first direction X; if the second heat exchange part 521 is arranged on one side of the first heat exchange channel 51 in the first direction X, the third heat exchange part 522 and the fourth heat exchange part 523 are respectively arranged on both sides of the first heat exchange channel 51 in the second direction Y.

[0186] In the above embodiment, by arranging the second heat exchange part 521, the third heat exchange part 522 and the fourth heat exchange part 523 on three sides of the first heat exchange channel 51 respectively, the second heat exchange channel 52 can surround the first heat exchange channel 51, thereby increasing the compactness of the arrangement of the first heat exchange tube 102, realizing the miniaturization of the structure of the first heat exchange tube 102, and thus facilitating the improvement of the volume energy density of the battery 1000. At the same time, the structure of the first heat exchange tube 102 can be simplified, and the processing and production of the heat exchange tube 10 can be facilitated.

[0187] According to some embodiments of the present application, Figure 11 As shown, the first heat exchange tube 102 may further include: a third heat exchange channel 53, the first heat exchange channel 51 is connected between the third heat exchange channel 53 and the second heat exchange channel 52, and the third heat exchange channel 53 is connected to the first heat exchange channel 51 at an angle.

[0188] That is to say, in the first heat exchange tube 102, the second heat exchange channel 52, the first heat exchange channel 51 and the third heat exchange channel 53 are connected in sequence, and the heat exchange medium can flow from the second heat exchange channel 52 through the first heat exchange channel 51 to the third heat exchange channel 53, or from the third heat exchange channel 53 through the first heat exchange channel 51 to the second heat exchange channel 52.

[0189] The third heat exchange channel 53 is connected to the first heat exchange channel 51 and is arranged at an angle greater than 0° and less than or equal to 180°. For example, the angle between the third heat exchange channel 53 and the first heat exchange channel 51 is 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc.

[0190] In the above embodiment, by providing the third heat exchange channel 53 , the heat exchange area of the first heat exchange tube 102 can be further increased, thereby further improving the heat exchange effect of the first heat exchange tube 102 .

[0191] According to some embodiments of the present application, Figure 11 As shown, the first heat exchange channel 51 includes a plurality of first heat exchange parts 511, and the plurality of first heat exchange parts 511 are connected sequentially in the second direction Y; the third heat exchange channel 53 is arranged on the side of the first heat exchange channel 51 away from the third heat exchange part 522, and the third heat exchange channel 53 is connected to the one of the plurality of first heat exchange parts 511 that is closest to the second heat exchange part 521 along the second direction Y.

[0192] Specifically, the third heat exchange channel 53 is arranged adjacent to the fourth heat exchange portion 523 and between the fourth heat exchange portion 523 and the first heat exchange portion 511. Thus, the third heat exchange channel 53 is also arranged circumferentially outside the first heat exchange channel 51. This increases the circumferential heat exchange area of the first heat exchange tube 102 and improves the heat exchange efficiency of the first heat exchange tube 102 at the circumferential side.

[0193] Furthermore, the third heat exchange channel 53 and the fourth heat exchange portion 523 can be arranged inside and outside the same side of the first heat exchange channel 51, thereby further increasing the heat exchange area at that location and improving heat exchange efficiency. Furthermore, because the third heat exchange channel 53 and the fourth heat exchange portion 523 are located at opposite ends of the first heat exchange channel 51 in the direction of heat exchange medium flow, they can exchange heat with the same area of the battery assembly 200, thereby improving temperature uniformity in that area.

[0194] Furthermore, the third heat exchange channel 53 is connected to the one of the multiple first heat exchange parts 511 that is closest to the second heat exchange part 521 along the second direction Y. In this way, when heat exchange is performed with the battery assembly 200, in the first heat exchange tube 102, the temperature of the heat exchange medium in the first heat exchange part 511 closest to the second heat exchange part 521 and the heat exchange medium in the third heat exchange channel 53, as well as the temperature of the heat exchange medium in the second heat exchange part 521 and the fourth heat exchange part 523, are respectively the relatively highest temperature and the relatively lowest temperature in the first heat exchange tube 102, while the temperature of the remaining parts is in the middle.

[0195] Due to the heat dissipation effect of the battery 1000, the edge temperature of the battery 1000 is lower than the middle temperature. In this way, the second heat exchange part 521 and the first heat exchange part 511 closest to the second heat exchange part 521 exchange heat in the same area, and the third heat exchange channel 53 and the fourth heat exchange part 523 exchange heat in the same area, thereby further improving the temperature uniformity in the battery assembly 200, balancing the temperature difference of the battery assembly 200, and further improving the temperature uniformity of the battery assembly 200.

[0196] In the above embodiment, by adding a third heat exchange channel 53 and connecting the third heat exchange channel 53 to the one of the multiple first heat exchange parts 511 that is closest to the second heat exchange part 521 along the second direction Y, the heat exchange area can be increased, the temperature difference of the battery assembly 200 can be balanced, and the temperature uniformity of the battery assembly 200 can be improved.

[0197] According to some embodiments of the present application, Figure 11 As shown, the third heat exchange channel 53 extends along the second direction Y away from the second heat exchange portion 521, and the first heat exchange portion 511 extends along the first direction X, wherein the first direction X and the second direction Y are set at an angle.

[0198] Specifically, one end of the third heat exchange part 522 is connected to one of the multiple first heat exchange parts 511 that is farthest from the second heat exchange part 521 along the second direction Y, and the other end of the third heat exchange part 522 extends toward a first heat exchange part 511 closest to the second heat exchange part 521. At the same time, the fourth heat exchange part 523 also extends toward a first heat exchange part 511 farthest from the second heat exchange part 521.

[0199] Furthermore, the third heat exchange channel 53 is arranged on a side of the first heat exchange channel 51 away from the third heat exchange portion 522. In this case, the third heat exchange channel 53 and the fourth heat exchange portion 523 are arranged on the same outer side of the first heat exchange portion 511 in the circumferential direction. The third heat exchange channel 53 and the fourth heat exchange portion 523 are located at opposite ends of the first heat exchange channel 51 in the direction of fluid flow. When the third heat exchange channel 53 and the fourth heat exchange portion 523 jointly exchange heat with the same area of the battery assembly 200, they can equalize temperature differences at the edge of the battery assembly 200, thereby improving temperature uniformity at the edge of the battery assembly 200.

[0200] In the above embodiment, by setting the third heat exchange channel 53 to extend along the second direction Y in the direction away from the second heat exchange part 521, the heat exchange area of the first heat exchange tube 102 can be increased, and the heat exchange effect of the first heat exchange tube 102 on the battery cell 210 can be improved; at the same time, when the third heat exchange channel 53 and the fourth heat exchange part 523 jointly exchange heat with the battery assembly 200, the temperature difference in the edge area of the battery assembly 200 can be balanced, thereby improving the temperature uniformity at the edge of the battery assembly 200.

[0201] like Figure 3 and Figure 11 As shown, the heat exchange element 100 according to the embodiment of the present application includes the heat exchange tube 10 according to the embodiment of the present application. Thus, by adopting the above-mentioned heat exchange tube 10, it is possible to increase the heat exchange area, improve heat exchange performance, and improve undesirable conditions such as collapse, wrinkling, and excessive thinness during the forming process of the bent section 12, thereby improving the structural strength of the bent section 12. Furthermore, the heat exchange tube 10 has a stronger pressure resistance during the heat exchange process, which is conducive to increasing the service life.

[0202] In some specific embodiments, Figure 1 As shown, the heat exchange element 100 may further include a joint 40 , and both ends of the heat exchange tube 10 are respectively connected to the joint 40 for connecting to other structures to enable the heat exchange medium to flow into and out of the heat exchange tube 10 .

[0203] In some embodiments where the heat exchange element 100 includes a plurality of heat exchange tubes 10 , the heat exchange element 100 may further include a current collector, and the plurality of heat exchange tubes 10 are connected in parallel via the current collector.

[0204] According to some embodiments of the present application, Figure 11-13 As shown, the heat exchange element 100 has one or more heat exchange tubes 10. When the number of heat exchange tubes 10 is multiple, the multiple heat exchange tubes 10 are arranged at intervals along the second direction Y, or arranged around each other, at least one heat exchange tube 10 is formed as the above-mentioned first heat exchange tube 102, and multiple heat exchange tubes 10 are arranged in parallel.

[0205] It is understood that the number of heat exchange tubes 10 in the heat exchange element 100 may be one, two, three, four, or more. When there are multiple heat exchange tubes 10, one of the multiple heat exchange tubes 10 may be formed as the first heat exchange tube 102, or two, three, four, or more heat exchange tubes 10 may be formed as the first heat exchange tube 102, or all of the multiple heat exchange tubes 10 may be formed as the first heat exchange tube 102.

[0206] Among them, in some specific embodiments, such as Figure 11 As shown, a plurality of heat exchange tubes 10 are arranged at intervals along the second direction Y, for example Figure 11 As shown, the heat exchange element 100 may include two heat exchange tubes 10, which are arranged at intervals along the second direction Y. Furthermore, the two heat exchange tubes 10 may both be formed as first heat exchange tubes 102. For another example, the heat exchange element 100 may include three heat exchange tubes 10, which are arranged in sequence along the second direction Y. Furthermore, the two heat exchange tubes 10 at the two ends of the three heat exchange tubes 10 are first heat exchange tubes 102, and the heat exchange tube 10 in the middle may have the same structure as the first heat exchange tube 102, or may have a different structure from the first heat exchange tube 102.

[0207] In other embodiments, multiple heat exchange tubes 10 are arranged around each other. Figure 12 As shown, the heat exchange element 100 has two heat exchange tubes 10 arranged in parallel, and the two heat exchange tubes 10 are arranged around each other. Furthermore, the two heat exchange tubes 10 can be formed into first heat exchange tubes 102. Figure 13 As shown, the heat exchange element 100 has three heat exchange tubes 10 arranged in parallel. The three heat exchange tubes 10 are wound around each other, and all of the three heat exchange tubes 10 can be formed into a first heat exchange tube 102 .

[0208] The plurality of heat exchange tubes 10 are arranged in parallel, that is, the inlets of the plurality of heat exchange tubes 10 are connected to the same liquid supply pipe, and the outlets of the plurality of heat exchange tubes 10 are connected to the same liquid outlet pipe.

[0209] In the above embodiment, by providing the heat exchange element 100 with one or more heat exchange tubes 10, and the multiple heat exchange tubes 10 are arranged at intervals along the second direction Y or arranged around each other, the diversity of the heat exchange tubes 10 can be increased, thereby improving the adaptability of the heat exchange element 100, so that it can meet the needs of different batteries 1000, thereby improving the market competitiveness of the battery 1000; at the same time, the multiple heat exchange tubes 10 are arranged in parallel, so that the multiple heat exchange tubes 10 can exchange heat at the same time, thereby reducing the heat exchange time of the heat exchange element 100 and improving the heat exchange efficiency.

[0210] According to some embodiments of the present application, Figure 12 As shown, the multiple heat exchange tubes 10 include a first heat exchange tube 102 and a second heat exchange tube 103. The second heat exchange tube 103 has the same structure as the first heat exchange tube 102, and the second heat exchange tube 103 is bent and arranged within the U-shaped region 50 of the first heat exchange tube 102. In the above embodiment, by providing multiple heat exchange tubes 10, the diversity of the heat exchange tubes 10 can be increased, so that the arrangement of the heat exchange tubes 10 can be designed according to the cooling requirements of the battery 1000, thereby further increasing the heat exchange effect of the heat exchange element 100 and improving the temperature uniformity of the battery 1000.

[0211] According to some embodiments of the present application, Figure 13 As shown, the second heat exchange tube 103 includes a U-shaped region 50 having the same structure as the first heat exchange tube 102 , and at least part of the first heat exchange channel 51 of the first heat exchange tube 102 is disposed in the U-shaped region 50 of the second heat exchange tube 103 .

[0212] It is understandable that only part of the first heat exchange channel 51 of the first heat exchange tube 102 may be arranged in the U-shaped area 50 of the second heat exchange tube 103 , or the entire first heat exchange channel 51 may be arranged in the U-shaped area 50 of the second heat exchange tube 103 .

[0213] For example Figure 13As shown, the plurality of heat exchange tubes 10 include a first heat exchange tube 102 and two second heat exchange tubes 103 . The two second heat exchange tubes 103 have the same structure as the first heat exchange tube 102 .

[0214] In the above embodiment, by setting the second heat exchange tube 103 to include a U-shaped area 50 with the same structure as the first heat exchange tube 102, at least part of the first heat exchange channel 51 of the first heat exchange tube 102 is arranged in the U-shaped area 50 of the second heat exchange tube 103, so that at least part of the first heat exchange tube 102 and the second heat exchange tube 103 can be arranged around each other. In this way, the winding method of the heat exchange channel can be arranged according to the heat exchange requirements of various parts of the battery assembly 200, further increasing the heat exchange effect of the heat exchange component 100 and improving the temperature uniformity of the battery 1000.

[0215] like Figure 11-13 As shown, the battery 1000 according to the embodiment of the present application includes the heat exchange tube 10 according to the embodiment of the present application. Therefore, by adopting the above-mentioned heat exchange tube 10, the temperature control performance of the battery 1000 can be improved.

[0216] In some embodiments, as Figure 2 and Figure 11 As shown, the battery 1000 also includes: a box assembly 300 and a battery assembly 200. The box assembly 300 includes a box body 310 that is stamped and formed as a whole. The box body 310 also includes a bottom wall 311 and a surrounding wall 312. The battery assembly 200 is arranged in the box body 310, and the battery assembly 200 includes a plurality of battery cells 210. For example, the box body 310 can be made of sheet metal and stamped into a basin shape to include a bottom wall 311 and a surrounding wall 312. Therefore, since the bottom wall 311 and the surrounding wall 312 of the box body 310 are stamped and formed as a whole, there is no need to consider the sealing problem at the connection between the bottom wall 311 and the surrounding wall 312, which can improve the sealing effect, thereby preventing muddy water from seeping into the box body 310 from the connection between the bottom wall 311 and the surrounding wall 312 and affecting the battery assembly 200, thereby improving the reliability of the battery 1000. Moreover, the box body 310 that is stamped and formed as a whole does not need to be spliced, which can improve production efficiency. The battery cells 210 may generate heat during operation, or may need to be heated in a low-temperature environment to maintain a suitable temperature range. Heat exchange tubes 10 can be provided to regulate the temperature of the battery cells 210, thereby improving the stability of the battery cells 210 and the battery life of the battery 1000.

[0217] In some embodiments of the present application, Figure 14 and Figure 15As shown, the battery 1000 includes a thermostat, which includes at least one of a first thermostat 110, a second thermostat 120, and a third thermostat 130. At least one of the first thermostat 110, the second thermostat 120, and the third thermostat 130 forms a heat exchange tube 10. The first thermostat 110 is disposed outside the box body 310 and is in contact with the outer wall of the box body 310. The second thermostat 120 is disposed within the box assembly 300 and is located between the battery assembly 200 and the box assembly 300. The third thermostat 130 is disposed within the box assembly 300 and is located between two adjacent battery cells 210.

[0218] For example, the battery 1000 may include only one of the first thermostat 110, the second thermostat 120, and the third thermostat 130; may include two of the first thermostat 110, the second thermostat 120, and the third thermostat 130; or may include all three of the first thermostat 110, the second thermostat 120, and the third thermostat 130. Thus, appropriate locations for the thermostats can be selected based on actual conditions to meet the temperature regulation requirements of the battery 1000.

[0219] The specific location of the first temperature regulating member 110 outside the box body 310 is not limited, for example, Figure 14 At least a portion of the first temperature regulating member 110 may be disposed below the bottom wall 311 of the box body 310, thereby enabling heat exchange with the battery assembly 200 over a wider range and improving the temperature regulation effect on the battery assembly 200. For another example, at least a portion of the first temperature regulating member 110 may also be disposed outside the surrounding wall 312 of the box body 310.

[0220] For example, Figure 14 As shown, the box assembly 300 may also include a bottom guard plate 340 located below the bottom wall 311 of the box body 310 to protect the box body 310 from bumps and other factors. At this time, if a first temperature control component 110 is provided below the bottom wall 311 of the box body 310, the first temperature control component 110 may be located between the bottom guard plate 340 and the bottom wall 311 of the box body 310, so that the bottom guard plate 340 may also protect the first temperature control component 110.

[0221] The specific location of the second temperature regulating member 120 in the box assembly 300 is not limited, for example, Figure 14At least a portion of the second temperature regulating member 120 may be disposed above the bottom wall 311 of the box body 310, so as to be sandwiched between the bottom wall 311 of the box body 310 and the bottom of the battery assembly 200. This allows heat exchange with the battery assembly 200 over a wider range, thereby improving the temperature regulation effect on the battery assembly 200. For another example, at least a portion of the second temperature regulating member 120 may be disposed below the box cover 320, so as to be sandwiched between the box cover 320 and the top of the battery assembly 200. This allows heat exchange with the battery assembly 200 over a wider range, thereby improving the temperature regulation effect on the battery assembly 200.

[0222] The specific location of the third temperature regulating member 130 in the box assembly 300 is not limited, for example, Figure 15 The adjacent battery cells 210 in the battery assembly 200 may have their large surfaces facing each other. Disposing the third temperature regulating member 130 between the large surfaces of the adjacent battery cells 210 may enhance the temperature regulating effect on the battery cells 210 .

[0223] For example, in combination Figure 14 The temperature regulating element may be a flat tube structure, that is, the temperature regulating element is formed in the form of a flat tube with a width greater than a thickness. A flow channel may be formed in the flat tube. A heat exchange liquid may be introduced into the flow channel to exchange heat with the battery assembly 200, thereby achieving a temperature regulating effect on the battery 1000.

[0224] Typically, heat exchange tubes used in batteries utilize a double-layer brazed plate structure, consisting of two brazed layers of sheet material, with a heat exchange channel formed between the two layers. In this application, by way of example, the flat tubes can be constructed by splicing together multiple extruded tube segments. The thickness of the flat tubes can be significantly smaller than that of the double-layer brazed plate structure, thereby occupying a smaller space and increasing the capacity of the battery 1000.

[0225] In addition, the thermal management system of the battery 1000 is not limited to only including the above-mentioned temperature regulating components. For example, in some embodiments, Figure 16 The box assembly 300 may further include an expansion beam 330 disposed in the box body 310. For example, there may be multiple expansion beams 330, and the battery assembly 200 is sandwiched between the multiple expansion beams 330. For example, it may include a first expansion beam 330 and a second expansion beam 330. The battery assembly 200 is sandwiched between the first expansion beam 330 and the second expansion beam 330. A heat exchange flow channel may be provided in the expansion beam 330 for temperature adjustment, thereby constituting a part of the thermal management system.

[0226] like Figure 1 As shown, an electrical device according to an embodiment of the present application includes a battery 1000 according to an embodiment of the present application. The electrical device can be any of the aforementioned devices or systems using the battery 1000. Since the performance of the battery 1000 is improved, the working power performance of the electrical device is improved.

[0227] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0228] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, characterized in that: The heat exchange tubes include a plurality of heat exchange tubes, the plurality of heat exchange tubes are arranged at intervals along the second direction, or arranged around each other, at least one of the heat exchange tubes is a first heat exchange tube, the first heat exchange tube includes a first heat exchange channel and a second heat exchange channel, the second heat exchange channel is bent to form a U-shaped area, the first heat exchange channel is bent in the U-shaped area, and is connected to the second heat exchange channel in a bent manner, and the plurality of heat exchange tubes are arranged in parallel; The heat exchange tube comprises a plurality of straight heat exchange sections and at least one bent section, the plurality of straight heat exchange sections are arranged at intervals, and the at least one bent section sequentially connects and communicates with the plurality of straight heat exchange sections; Wherein, a first reinforcement member is provided in at least one of the bending sections.

2. The battery according to claim 1, characterized in that The first reinforcement member is arranged in each of the bending sections.

3. The battery according to claim 1, characterized in that The bending section includes two oppositely arranged wall surfaces, and the first reinforcement member connects the two opposite wall surfaces.

4. The battery according to claim 3, characterized in that The wall surface is a plane.

5. The battery according to claim 3, characterized in that The first reinforcement member includes a plurality of first reinforcement ribs, which are arranged at intervals along the bending radius direction of the bending section and divide the heat exchange flow channel in the bending section into a plurality of sub-flow channels.

6. The battery according to claim 5, characterized in that The first reinforcing rib extends perpendicular to the wall surface.

7. The battery according to claim 5, characterized in that The first reinforcement rib extends obliquely relative to the wall surface.

8. The battery according to claim 7, characterized in that The inclination directions of the plurality of first reinforcing ribs are the same.

9. The battery according to claim 7, characterized in that In the bending radius direction of the bending section, the first reinforcing ribs located on both sides of the midpoint of the bending section have opposite inclination directions, and the first reinforcing ribs located on the same side of the midpoint of the bending section have the same inclination direction.

10. The battery according to any one of claims 5 to 8, characterized in that The plurality of first reinforcing ribs are arranged at equal intervals.

11. The battery according to any one of claims 5 to 9, characterized in that In the direction of the bending radius of the bending section, the width of the sub-channel close to the middle is greater than the width of the sub-channel close to the edge.

12. The battery according to claim 11, characterized in that The inner edge bending diameter of the bending section is R, the width of the bending section along the bending radius direction is D, R / D is 1 to 3, and in the bending radius direction of the bending section, the sub-channel located in the middle is the first sub-channel, and multiple second sub-channels are provided on both sides of the first sub-channel, and the widths of the multiple second sub-channels are equal, and the width of the first sub-channel is greater than the width of the second sub-channel.

13. The battery according to any one of claims 5 to 12, characterized in that The maximum width of at least two of the sub-flow channels close to the edge is L, the thickness of the bending section in a direction perpendicular to the bending plane is H, and H / L is 0.2-3.

14. The battery according to claim 13, characterized in that H / L is 0.8~1.

2.

15. The battery according to claim 5, characterized in that The plurality of first reinforcing ribs are arranged symmetrically or centrally symmetrically about the midpoint of the bending section.

16. The battery according to any one of claims 1 to 15, characterized in that The inner edge bending diameter of the bending section is R, the width of the bending section along the bending radius direction is D, and R is greater than or equal to D.

17. The battery according to any one of claims 1 to 16, characterized in that A second reinforcement member is provided in the straight heat exchange section.

18. The battery according to claim 17, characterized in that The second reinforcement member includes a second reinforcement rib, and the second reinforcement rib is provided in the middle of the straight heat exchange section in the width direction of the straight heat exchange section; or, The first reinforcement member includes a plurality of first reinforcement ribs arranged at intervals along the bending radius direction of the bending section, and the second reinforcement member includes a plurality of second reinforcement ribs, which are arranged in a one-to-one correspondence with and connected to the first reinforcement ribs.

19. The battery according to any one of claims 1 to 18, characterized in that The heat exchange tube is formed by bending a single tube; and / or the heat exchange tube is a flat tube.

20. The battery according to any one of claims 1 to 19, characterized in that The bending section and the first reinforcement are integrally formed.

21. The battery according to any one of claims 1 to 20, characterized in that The straight heat exchange section extends along a first direction, and a plurality of the straight heat exchange sections are arranged at intervals along a second direction. The first direction is perpendicular to the second direction. The bending section connects two of the straight heat exchange sections arranged at intervals and is semicircular.

22. The battery according to claim 21, characterized in that Among any three adjacent straight heat exchange segments along the second direction, the first end of the middle straight heat exchange segment is connected to the first end of one of the adjacent straight heat exchange segments through the bending segment, and the second end of the middle straight heat exchange segment is connected to the second end of another adjacent straight heat exchange segment through the bending segment.

23. The battery according to any one of claims 1 to 20, characterized in that At least two of the straight heat exchange sections extend at an angle, and the bent section is arc-shaped and connects the two straight heat exchange sections at the angle.

24. The battery according to any one of claims 1 to 20, characterized in that The first heat exchange channel includes a plurality of first heat exchange parts, which are arranged at intervals and are bent and connected in sequence.

25. The battery according to any one of claims 1 to 20, characterized in that The second heat exchange channel includes: a second heat exchange part, a third heat exchange part and a fourth heat exchange part. The second heat exchange part extends along the first side circumference of the first heat exchange channel. The third heat exchange part is connected between the second heat exchange part and the first heat exchange channel and extends along the second side circumference of the first heat exchange channel. The first end of the third heat exchange part is connected to the second heat exchange part at an angle and the second end is connected to the first heat exchange channel at an angle. The fourth heat exchange part is communicated with the second heat exchange part, connected to the second heat exchange part at an angle, and extends along the third side circumference of the first heat exchange channel.

26. The battery according to claim 25, characterized in that The first heat exchange tube further includes a third heat exchange channel. The first heat exchange channel is connected between the third heat exchange channel and the second heat exchange channel, and the third heat exchange channel is connected to the first heat exchange channel at an angle.

27. The battery according to claim 26, characterized in that The first heat exchange channel includes a plurality of first heat exchange parts, and the plurality of first heat exchange parts are bent and connected in sequence in the second direction. The third heat exchange channel is arranged on the side of the first heat exchange channel away from the third heat exchange part. The third heat exchange channel is connected to the one of the plurality of first heat exchange parts that is closest to the second heat exchange part along the second direction. The third heat exchange channel extends along the second direction toward a direction away from the second heat exchange part. The first heat exchange part extends along the first direction, and the first direction is set at an angle to the second direction.

28. The battery according to any one of claims 1 to 27, characterized in that Also includes: A box assembly and a battery assembly, wherein the box assembly includes a box body formed by integral stamping, the box body includes a bottom wall and a surrounding wall, the battery assembly is arranged in the box body, and the battery assembly includes a plurality of battery cells.

29. The battery according to claim 28, characterized in that The battery includes a thermostat, the thermostat includes at least one of a first thermostat, a second thermostat, and a third thermostat, at least one of the first thermostat, the second thermostat, and the third thermostat forms the heat exchange tube, wherein: The first temperature regulating component is arranged outside the box body and is in contact with the outer wall of the box body; The second temperature regulating component is provided in the box assembly and is located between the battery assembly and the box assembly; The third temperature regulating component is arranged in the box assembly and is located between two adjacent battery cells.

30. An electrical device, characterized in that: Comprising a battery according to any one of claims 1-29.

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