Heat exchange tubes, batteries and electrical devices

Abstract

A heat exchange tube, a battery and an electrical device. The heat exchange tube includes a plurality of straight heat exchange sections and at least one bent section, wherein the plurality of straight heat exchange sections are arranged at intervals, and the at least one bent section sequentially connects and communicates the plurality of straight heat exchange sections; wherein a first reinforcement member is provided in at least one of the bent sections. In the above technical solution, by sequentially connecting and communicating the plurality of straight heat exchange sections through the bent sections, and providing the first reinforcement member in the bent sections, the heat exchange area of ​​the heat exchange tube can be increased, the heat exchange performance can be improved, and the undesirable conditions such as collapse, wrinkling, and excessive thinness during the forming process of the bent sections can be improved, the structural strength of the bent sections can be improved, and the heat exchange tube has a stronger pressure resistance during the heat exchange process, which is conducive to improving the service life.

Description

Technical Field

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

[0002] The structural strength of 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 heat exchange tubes has become a research and development focus in this field. Summary of the invention

[0003] The embodiments of the present application provide a heat exchange tube, a battery, and an electrical device, which can improve the reliability of the battery and the electrical device by improving the strength of the heat exchange tube.

[0004] In a first aspect, an embodiment of the present application provides a heat exchange tube, comprising a plurality of straight heat exchange sections and at least one bent section, wherein the plurality of straight heat exchange sections are arranged at intervals, and the at least one bent section sequentially connects and communicates the plurality of straight heat exchange sections; wherein a first reinforcement member is provided in at least one bent section.

[0005] In the above technical solution, multiple straight heat exchange sections are sequentially connected and communicated through the bending section, and the first reinforcement is arranged in the bending section, which can 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 application of heat exchange, which is conducive to improving the service life. In addition, reducing the undesirable conditions can increase the contact heat exchange area between the heat exchange tube and the heat exchange component to be exchanged, and improve the heat exchange efficiency.

[0006] In some embodiments, a first reinforcement member is disposed in each bending segment.

[0007] In the above technical solution, it is possible to prevent large-scale wrinkling, collapse and other problems from occurring during the bending process of each bending section, thereby improving the overall pressure resistance of the heat exchange tube.

[0008] In some embodiments, the bending section includes two wall surfaces that are arranged opposite to each other, and the first reinforcement member connects the two opposite wall surfaces.

[0009] 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.

[0010] In some embodiments, the wall surface is planar.

[0011] 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.

[0012] In some embodiments, 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 channel in the bending section into a plurality of sub-channels.

[0013] In the above technical solution, 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, reduce 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.

[0014] In some embodiments, the first reinforcing rib extends perpendicular to the wall surface.

[0015] 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 occupies less space, which is beneficial to reducing flow resistance, and the first reinforcing rib has a better supporting effect on the wall surface in the height direction.

[0016] In some embodiments, the first reinforcing rib extends obliquely relative to the wall surface.

[0017] 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.

[0018] In some embodiments, the inclination directions of the plurality of first reinforcing ribs are the same.

[0019] In the above technical solution, the difficulty of forming the plurality of first reinforcing ribs is reduced.

[0020] 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 directions.

[0021] In the above technical solution, the two first reinforcing ribs adjacent to the midpoint of the bending section cooperate with the two wall surfaces to form a trapezoidal or arched structure, which is conducive to improving the anti-extrusion ability near the midpoint of the bending section and is not easy to deform. Moreover, when the width of the bending section is constant, it is conducive to reducing the number of required first reinforcing ribs, thereby reducing the overall flow resistance.

[0022] In some embodiments, the plurality of first reinforcing ribs are arranged at equal intervals.

[0023] In the above technical solution, the difficulty of forming the plurality of first reinforcing ribs is reduced, and the flow resistance of different sub-channels is made more uniform.

[0024] 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.

[0025] 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 member 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.

[0026] In some embodiments, the inner edge bending diameter of the bending section is R, the width of the bending section along the bending radius 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.

[0027] In the above technical solution, the structural reinforcement effect is improved and the heat exchange capacity requirements can be met. The first sub-channel has a larger width to reduce the number of required first reinforcement ribs and reduce flow resistance; multiple second sub-channels with smaller widths can effectively reduce the spread 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 capacity and heat exchange capacity.

[0028] In some embodiments, the maximum width of at least two sub-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.

[0029] 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.

[0030] In some embodiments, H / L is 0.8-1.2.

[0031] 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.

[0032] In some embodiments, the plurality of first reinforcing ribs are arranged symmetrically or centrally symmetrically about the midpoint of the bending segment.

[0033] In the above technical solution, the forces on both sides of the midpoint of the bending section in the radial direction are more uniform, and the thinning and thickening are more uniform. In addition, during the production process, the tube body can be bent clockwise or counterclockwise, that is, any side of the edges on both sides of the width direction of the tube body can be formed as the inner edge of the bending section, which is conducive to improving production efficiency.

[0034] 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.

[0035] In the above technical solution, within the above ratio range, the strength of the bending 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.

[0036] In some embodiments, a second reinforcement member is provided in the straight heat exchange section.

[0037] 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.

[0038] In some embodiments, the second reinforcement member includes a second reinforcement rib, and the second reinforcement rib is arranged in the middle of the straight heat exchange section in the width direction of the straight heat exchange section.

[0039] 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.

[0040] In some embodiments, 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, and the second reinforcement ribs are arranged and connected to the first reinforcement ribs in a one-to-one correspondence.

[0041] 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 where 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 limited by the internal first reinforcement rib and the second reinforcement rib, which is conducive to improving production efficiency.

[0042] In some embodiments, the heat exchange tube is formed by bending a single tube; and / or, the heat exchange tube is a flat tube.

[0043] 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 there is no need for splicing and sealing, which is beneficial to reducing the risk of sealing failure.

[0044] In some embodiments, the bent section is integrally formed with the first reinforcement member.

[0045] In the above technical solution, the one-piece molding can save the assembly process of installing the first reinforcement in the 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.

[0046] 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.

[0047] 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.

[0048] 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 section, 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 section.

[0049] In the above technical solution, from one end of 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 by the position of other straight heat exchange sections and bent sections during the bending process, thereby improving production efficiency.

[0050] 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.

[0051] 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.

[0052] In some embodiments, the heat exchange tube includes 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.

[0053] 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 are consistent, thereby improving the temperature uniformity of the battery, thereby improving the service life of the battery to a certain extent.

[0054] In some embodiments, the first heat exchange channel includes a plurality of first heat exchange parts, and the plurality of first heat exchange parts are arranged at intervals and are bent and connected in sequence.

[0055] In the above technical solution, on the one hand, by setting up a plurality of 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 a plurality of first heat exchange parts, the overall heat exchange effect can be improved while reducing the temperature difference between the internal and external battery cells.

[0056] 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 connected to 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.

[0057] 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, 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.

[0058] 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.

[0059] In the above technical solution, by providing the third heat exchange flow channel, the heat exchange area of ​​the first heat exchange tube can be further increased, and thus the heat exchange effect of the first heat exchange tube can be further improved.

[0060] In some embodiments, the first heat exchange channel includes multiple first heat exchange parts, and the multiple first heat exchange parts are connected in sequence by bending 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 in 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.

[0061] 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.

[0062] In a second aspect, an embodiment of the present application further provides a battery, comprising the above-mentioned heat exchange tube.

[0063] In some embodiments, the battery includes a plurality of heat exchange tubes, and the plurality of heat exchange tubes are arranged at intervals along the second direction, or are arranged around each other. At least one heat exchange tube is a first heat exchange tube, and 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. The plurality of heat exchange tubes are arranged in parallel.

[0064] In the above technical solution, by providing one or more heat exchange tubes, and arranging the multiple heat exchange tubes at intervals along the second direction Y or arranging them around each other, the diversity of the heat exchange tubes can be increased, thereby improving the adaptability of the heat exchange tubes so that they can meet different battery requirements and thereby improve the market competitiveness of the battery; at the same time, arranging multiple heat exchange tubes in parallel can enable multiple heat exchange tubes to exchange heat at the same time, thereby reducing the heat exchange time of the heat exchange tubes and improving the heat exchange efficiency.

[0065] 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 a plurality of battery cells.

[0066] In the above technical solution, since the bottom wall and the surrounding wall of the box body are integrally stamped, there is no need to consider the sealing problem at the connection between the bottom wall and the surrounding wall, which can improve the sealing effect, thereby preventing muddy water from penetrating into the box body from the connection between the bottom wall and the surrounding wall to affect the battery assembly, thereby improving the reliability of the battery. Moreover, the integrally stamped box body does not need to be spliced, which can improve production efficiency.

[0067] 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.

[0068] In the above technical solution, the battery cell can generate heat during operation, or the battery cell needs to be heated in a low temperature environment to keep the battery cell in an appropriate temperature range. By setting a thermostat, the temperature of the battery cell can be adjusted, the stability of the battery cell can be improved, and the battery life can be improved.

[0069] In a third aspect, an embodiment of the present application further provides an electrical device including the above-mentioned battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 A schematic diagram of a vehicle provided in an embodiment of the present application;

[0071] Figure 2 An exploded view of a battery provided for some embodiments of the present application;

[0072] Figure 3 A schematic diagram of the structure of a heat exchange tube provided in some embodiments of the present application;

[0073] Figure 4 for Figure 3 An exploded view of the heat exchange tube shown;

[0074] Figure 5 for Figure 3 A partial structural schematic diagram of a heat exchange tube is shown;

[0075] Figure 6 The bending section provided in the first embodiment of the present application is along Figure 5 The cross-sectional view in the direction indicated by the AA line;

[0076] Figure 7 A cross-sectional view of a bending section provided in the second embodiment of the present application;

[0077] Figure 8A cross-sectional view of a bending section provided in the third embodiment of the present application;

[0078] Fig. 9 A cross-sectional view of a bending section provided in a fourth embodiment of the present application;

[0079] Fig.10 The straight heat exchange section provided in the embodiment of the present application is along Figure 5 A cross-sectional view in the direction indicated by line BB;

[0080] Fig.11 A schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0081] Fig.12 A partial structural schematic diagram of a battery provided in some other embodiments of the present application;

[0082] Fig.13 A partial structural schematic diagram of a battery provided in some embodiments of the present application;

[0083] Fig.14 A partial cross-sectional view of a battery provided for some embodiments of the present application;

[0084] Fig.15 An exploded view of a portion of a battery provided in some embodiments of the present application;

[0085] Fig.16 An assembly diagram of the partial components of a battery provided for some embodiments of the present application.

[0086] Reference numerals:

[0087] Vehicle 1; battery 1000; controller 2000; motor 3000;

[0088] 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;

[0089] Heat exchange element 100; first temperature adjustment element 110; second temperature adjustment element 120; third temperature adjustment element 130;

[0090] Heat exchange tube 10; first heat exchange tube 102; second heat exchange tube 103; straight heat exchange section 11; bending section 12; wall surface 121; sub-channel 13; first sub-channel 131; second sub-channel 132;

[0091] A first reinforcement member 20; a first reinforcement rib 21;

[0092] A second reinforcement member 30; a second reinforcement rib 31;

[0093] Connector 40;

[0094] 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;

[0095] The first direction is X; the second direction is Y; the third direction is Z. DETAILED DESCRIPTION

[0096] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0097] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. 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 and secondary relationship.

[0098] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0099] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0100] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0101] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0102] The term "plurality" used in the present application refers to two or more (including two).

[0103] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0104] It is understandable that the temperature environment inside the battery is affected by the external weather conditions. The battery cells in the battery need to be within a certain temperature range during operation. When the temperature inside the battery exceeds or falls below this range, the stability and performance of the battery will be greatly affected. For example, when the weather is hot, the battery cells need to be cooled and dissipated so that the temperature inside the battery is within the required temperature range. When the weather is cold, the battery cells need to be heated and heated so that the temperature inside the battery can still be within the required temperature range.

[0105] The heat exchange element can be used to circulate heat exchange medium and perform heat exchange with the 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, thereby realizing heat exchange with the components to be exchanged, heating or cooling the components to be exchanged, achieving temperature regulation, and placing the components to be exchanged in a more suitable temperature range.

[0106] The structural strength of the heat exchange tube in the heat exchange component has an important impact on its service life and the risk of airtight failure. For example, in the embodiment where the heat exchange component is used for batteries, the weak structural strength of the heat exchange tube will lead to insufficient pressure bearing capacity, and it is easy to cause structural deformation and damage, airtight failure, etc. due to external forces such as the weight of the battery assembly, the expansion force of the battery cell, and external impact force, thereby reducing the heat exchange capacity or causing leakage of the heat exchange medium. Therefore, how to improve the structural strength of the heat exchange tube has become the research and development focus in this field.

[0107] 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.

[0108] In some related technologies, during the bending process, the collapse and wrinkling problems are improved by filling the heat exchange tube with fillers such as corundum, ice, and pulling mandrels. However, the fillers need to be sealed, frozen, pulled, and other processes, which increases the industrial difficulty and wastes time. In addition, the heat exchange tube needs to be removed after the bending is completed, and there is still a risk of collapse and deformation of the heat exchange tube.

[0109] 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 member is provided in at least one bent section.

[0110] 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 member is arranged in the bending section, which can increase the heat exchange area of ​​the heat exchange tube, improve the heat exchange performance, and improve the collapse, wrinkling, too thin 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 heat exchange process, which is beneficial to improve the service life.

[0111] The heat exchange tube disclosed in the embodiment of the present application can be used in an electrical device using a battery as a power source or various energy storage systems using a battery as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0112] For the convenience of description, the following embodiments are described by taking a vehicle 1 as an example of an electrical device in an embodiment of the present application.

[0113] Reference Figure 1 , Figure 1 A schematic diagram of a vehicle 1 provided for some embodiments of the present application. Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1000 is provided inside the vehicle 1, and the battery 1000 may be provided at the bottom, head or tail of the vehicle 1. The battery 1000 may be used to power the vehicle 1, for example, the battery 1000 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery 1000 to power the motor 3000, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0114] In some embodiments of the present application, the battery 1000 can not only serve as an operating power source for the vehicle 1 , but also serve 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 .

[0115] 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 box assembly 300, a battery cell 210, and a heat exchange element 100. The box assembly 300 has a receiving cavity. The battery cell 210 is received in the receiving cavity of the box assembly 300. The heat exchange element 100 can be disposed between the battery cell 210 and the box assembly 300, or between adjacent battery cells 210.

[0116] Among them, the box assembly 300 is used to provide a storage space for the battery cell 210, and the box assembly 300 can adopt a variety of structures. In some embodiments, the box assembly 300 may include a first part (such as the box body 310 described below) and a second part (such as the box cover 320 described below), the first part and the second part cover each other, and the first part and the second part jointly define a storage space for accommodating the battery cell 210. The second part can be a hollow structure with one end open, and the first part can be a plate-like structure, and the first part covers the open side of the second part, so that the first part and the second part jointly define a storage space; the first part and the second part can also be hollow structures with one side open, and the open side of the first part covers the open side of the second part. Of course, the box assembly 300 formed by the first part and the second part can be a variety of shapes, such as a cylinder, a cuboid, etc. Optionally, in some embodiments, the box assembly 300 also includes a bottom guard plate 340, which is arranged on the lower side of the box body 310 to further enhance the bearing strength and impact resistance of the bottom of the box body 310. The bottom guard plate 340 may be made of a variety of materials, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0117] 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 mixed connection. A mixed connection means that the multiple battery cells 210 are both connected in series and in parallel. The multiple battery cells 210 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 210 is accommodated in the box assembly 300; of course, the battery 1000 may also be a battery module formed by connecting multiple battery cells 210 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box assembly 300. The battery 1000 may also include other structures, for example, the battery 1000 may also include a busbar component for realizing electrical connection between the multiple battery cells 210.

[0118] Each battery cell 210 may be a secondary battery or a primary battery, or 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.

[0119] In the battery 1000, the heat exchange element 100 may be disposed between the multiple battery cells 210 and the top wall of the box assembly 300, or between the multiple battery cells 210 and the bottom wall of the box assembly 300, or between the bottom wall of the box assembly 300 and the bottom guard plate 340, or between two adjacent battery cells 210, to provide heat exchange for the multiple battery cells 210. In some embodiments, the heat exchange element 100 may include a heat exchange tube 10 and a current collector, wherein the heat exchange tube 10 is connected to the current collector, and the heat exchange tube 10 may be a flat tube, a round tube, a harmonica tube, or other shapes of tubes, and the current collector may be a rectangular tube or a round tube, etc.

[0120] Hereinafter, a heat exchange tube 10 according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0121] Please refer to Figure 3-Figure 9 , Figure 3 and Figure 4 A schematic diagram of the structure of a heat exchange tube 10 provided in some embodiments of the present application; Figure 5 for Figure 3 A partial structural schematic diagram 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.

[0122] Specifically, a plurality of straight heat exchange sections 11 are arranged at intervals, and at least one bending section 12 sequentially connects and communicates the plurality of straight heat exchange sections 11. At least one bending section 12 is provided with a first reinforcement member 20 therein.

[0123] The heat exchange tube 10 is a tube structure that can allow the medium to flow and limit the flow path of the medium, such as a circular tube, a rectangular tube, an elliptical tube, etc. The heat exchange tube 10 can be made of a material with excellent thermal conductivity, such as a metal material, specifically aluminum, copper, etc. For example, the heat exchange tube 10 can be an aluminum tube. The straight heat exchange section 11 refers to a heat exchange section extending along a straight line, and the bent section 12 refers to a heat exchange section extending along a broken line or a curve.

[0124] At least one bending section 12 is arranged at intervals between multiple straight heat exchange sections 11, and the multiple straight heat exchange sections 11 are sequentially connected and connected, which means that the channels in the straight heat exchange sections 11 are not directly connected, but are indirectly connected through the bending sections 12. In space, a certain gap can be formed between the straight heat exchange sections 11, or they can be in contact with each other, which is within the protection scope of the present application.

[0125] By connecting the straight heat exchange section 11 through the bending section 12, the extension path of the heat exchange tube 10 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.

[0126] 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 protection scope of the present application.

[0127] In the present application, the forming process of the heat exchange tube 10 is not limited, for example, it can be formed by extrusion process, or it can be formed by sheet metal bending and fixed by welding, etc. The straight heat exchange section 11 and the bending section 12 can be formed as one piece, or they can be formed separately and then spliced ​​together, and the forming process of the straight heat exchange section 11 and the bending section 12 can be the same or different.

[0128] The first reinforcement member 20 may be made of a material with a certain strength, such as stainless steel, composite materials, multilayer materials, etc. The structure of the first reinforcement member 20 may be flexibly set according to actual conditions. For example, the first reinforcement member 20 may include a plate body that fits the side wall of the bending section 12; for example, the first reinforcement member 20 may include ribs connecting the opposite side walls; etc.

[0129] At least one bending section 12 is provided with a first reinforcement member 20. In the embodiment where there is one bending section 12, the first reinforcement member 20 is provided in the bending section 12; in the embodiment where there are multiple bending sections 12, the first reinforcement member 20 may be provided in one bending section 12, or multiple or all bending sections 12 may be provided with the first reinforcement member 20.

[0130] 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 likely 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.

[0131] In the present application, the first reinforcement 20 can strengthen the structural strength of the bending section 12, so that the bending section 12 is not prone to large-scale wrinkling, deformation, collapse, thinning and other problems during the bending process, so that the bending section 12 itself has better pressure resistance and corrosion resistance; and in the heat exchange process of the heat exchange tube 10, the first reinforcement 20 can further improve the overall pressure resistance of the heat exchange tube 10, and improve the overall structural strength and service life of the heat exchange tube 10. In addition, after reducing the defects of wrinkling, deformation and collapse of the bending section 12, the contact area between the heat exchange tube 10 and the heat exchange component such as the battery 1000 is increased, the heat exchange area and heat exchange effect are increased, and the reliability of the battery 1000 is improved.

[0132] For example, in a heat exchange tube 10 of a specific embodiment of the present application, a plurality of bending sections 12 are sequentially connected and communicated with a plurality of straight heat exchange tubes 10, the radial width of the bending section 12 is 23 mm, the thickness perpendicular to the radial direction is 6 mm, and a first reinforcement member 20 is provided in the bending section 12. The difference between the comparative example and the present embodiment is that the first reinforcement member 20 is not provided in the bending section 12. After testing, the heat exchange tube 10 of the comparative example withstands a pressure of 200 kPa, while the heat exchange tube 10 of the present embodiment withstands a pressure of 2000 kPa. By providing the first reinforcement member 20, the pressure resistance of the heat exchange tube 10 is greatly improved.

[0133] 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 arranged in the bending section 12, which can improve the undesirable conditions such as collapse, wrinkling, and excessive thinness during the forming process of the bending section 12, improve the structural strength of the bending section 12, and make the heat exchange tube 10 have stronger pressure resistance during the application of heat exchange, which is beneficial to improve the service life. In addition, reducing the undesirable conditions can increase the contact heat exchange area between the heat exchange tube 10 and the components to be heat exchanged, thereby improving the heat exchange efficiency.

[0134] According to some embodiments of the present application, a first reinforcement member 20 is provided in each bending section 12. This prevents large-area 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.

[0135] According to some embodiments of the present application, Figure 6-Figure 9 As shown, the bending section 12 includes two oppositely disposed walls 121, and the first reinforcement member 20 connects the opposite side walls 121. The position stability of the first reinforcement member 20 in the bending section 12 can be improved, and it is not easy to move during the bending process and the application of heat exchange to affect the structural reinforcement effect.

[0136] In some specific embodiments, at least one wall 121 connected to the first reinforcement member 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.

[0137] In some specific embodiments, Figure 6-Figure 9 As shown, the wall surface 121 is a plane. A plane is conducive to increasing the heat exchange area between the heat exchange tube 10 and the component to be heat exchanged, improving the heat exchange efficiency, and is more conducive to the connection between the first reinforcement 20 and the wall surface 121, reducing the difficulty of connection. It is worth noting that due to the influence of factors such as processing technology, the wall surface 121 of the heat exchange tube 10 produced is not an absolute plane, and may have certain deformations, pits, small protrusions and other defects that can be ignored.

[0138] 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 direction of the bending section 12, and the heat exchange flow channel in the bending section 12 is divided into a plurality of sub-flow channels 13. During the bending process, the area near the inner edge of the bending section 12 is prone to wrinkling, and the wrinkling phenomenon can be blocked in sequence by the plurality of first reinforcement ribs 21 radially outward, so that the inner side of the first first reinforcement rib 21 from the inside to the outside is the most seriously wrinkled (but the wrinkling degree is lighter than that without the first reinforcement member 20), the first and second first reinforcement ribs 21 are slightly wrinkled, and the second and third first reinforcement ribs 21 are almost not wrinkled. Therefore, the plurality of first reinforcement ribs 21 arranged at intervals along the radial direction can greatly reduce the wrinkled area, and play an effective supporting role for the bending section 12 in different radial areas, reduce the thinning rate of the plate near the radial outer edge area, thereby greatly improving the structural strength of the bending section 12 and reducing the risk of collapse, deformation, and cracking.

[0139] In some embodiments, 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 occupied space is smaller, which is conducive to reducing the flow resistance, and the first reinforcing rib 21 has a better supporting effect on the wall surface 121 in the height direction.

[0140] In some embodiments, Figure 7 and Fig. 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 is shown to be 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, thereby 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.

[0141] In some embodiments, 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 .

[0142] In some embodiments, Fig. 9 As shown, in the bending radius direction of the bending section 12, the first reinforcing ribs 21 located on both sides of the midpoint of the bending section 12 have opposite inclination directions, and the first reinforcing ribs 21 located on the same side of the midpoint of the bending section 12 have the same inclination direction. The two first reinforcing ribs 21 adjacent to the midpoint of the bending section 12 cooperate with the two side walls 121 to form a trapezoidal or arched structure, which is beneficial to improving the anti-extrusion ability near the midpoint of the bending section 12 and is not easy to deform. In addition, when the width of the bending section 12 is constant, it is beneficial to reduce the number of required first reinforcing ribs 21, thereby reducing the overall flow resistance.

[0143] In addition, in some specific embodiments, Fig. 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 a larger distance between the two first reinforcing ribs 21 (such as Fig. 9 The upper end as shown in the figure 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 increase the heat exchange area between the middle sub-channel 13 and the component to be heat exchanged and improve the heat exchange effect.

[0144] 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.

[0145] According to some embodiments of the present application, Figure 8-Figure 9As shown, in the direction of the bending radius of the bending section 12, the width of the sub-channel 13 near the middle is greater than the width of the sub-channel 13 near the edge. In other words, the first reinforcing ribs 21 near the edge are denser than the first reinforcing ribs 21 near the middle. For example, the width gradually decreases from the middle sub-channel 13 to the sub-channel 13 at the edge; or, the width of the middle sub-channel 13 is greater than the width of all other sub-channels 13; or, the width of the sub-channel 13 at the edge is less than the width of all other sub-channels 13, which are all within the protection scope of the present application.

[0146] 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 member 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.

[0147] According to some embodiments of the present application, Figure 5 As shown, the inner edge bending diameter of the bending section 12 is R, the width of the bending section 12 along the bending radius direction is D, and R is greater than or equal to D. If the inner edge bending diameter of the bending section 12 is too small, it will cause too much material to pile up in the area near the inner edge, and the area near the outer edge will become too thin, and the requirements for the first reinforcement 20 will be too high. For example, too many first reinforcement ribs 21 need to be set, resulting in a serious reduction in flow resistance. Within the above-mentioned ratio range, the strength of the bending section 12 can be strengthened by the first reinforcement 20, and the flow resistance will not be too large, taking into account both the service life and the heat exchange capacity.

[0148] In addition, if the inner edge bending diameter of the bending section 12 is too large, the area that the heat exchange tube 10 can cover within a certain space range will be too small, resulting in a small heat exchange area and reduced heat exchange capacity. Figure 5 and Figure 8 As shown, the inner edge bending diameter of the bending section 12 is R, the width of the bending section 12 along the bending radius direction is D, and R / D is 1 to 3, which not only improves the structural strengthening effect, but also meets the heat exchange capacity requirements. For example, in some specific embodiments, R / D is 1, 1.5, 2, 2.5, 3, etc.

[0149] 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.

[0150] 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 of the inner and outer edges to the middle, reduce the generation of defects and limit the defects to a smaller radial range, and effectively improve the anti-extrusion ability and heat exchange capacity.

[0151] 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. H / L is 0.2-3. If H / L is too small, the spacing between the first reinforcing ribs 21 will be too large, the amount of wrinkling will increase, or the thickness of the sub-flow channel 13 will be too small and the flow resistance will be too large; if H / L is too large, the first reinforcing ribs 21 will be too densely arranged and the flow resistance will be too large. Within the above ratio range, the dual needs of reducing wrinkling and collapse problems and reducing flow resistance are taken into account.

[0152] In some embodiments, H / L can be 0.8 to 1.2, which can further improve the structural reinforcement effect, improve wrinkling and collapse problems, 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 is equal to 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.

[0153] In some embodiments of the present application, Figure 6-Figure 9 As shown, the plurality of first reinforcing ribs 21 are arranged symmetrically or centrally about the midpoint of the bending section 12. This makes the forces on both sides of the midpoint of the bending section 12 in the radial direction more uniform, and the thinning and thickening are more uniform. In addition, during the production process, the tube body can be bent clockwise or counterclockwise, that is, any side of the edges on both sides of the width direction of the tube body can be formed as the inner edge of the bending section 12, which is conducive to improving production efficiency.

[0154] According to some embodiments of the present application, Fig.10 The figure shows a cross-sectional view of a straight heat exchange section 11 of a heat exchange tube 10 provided in an embodiment of the present application, wherein a second reinforcement member 30 is provided in the straight heat exchange section 11. 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 improving the pressure resistance performance.

[0155] In some embodiments, continue to refer to Fig.10As shown, the second reinforcement member 30 includes a second reinforcement rib 31. The second reinforcement rib 31 is arranged 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 need to be bent, there is no problem of wrinkling, collapse, etc. caused by bending. Therefore, by setting a small number of second reinforcement ribs 31, it is possible to meet the strength requirements and reduce the flow resistance of the heat exchange medium in the straight heat exchange section 11, which is conducive to improving the heat exchange effect.

[0156] In other embodiments, the first reinforcement member 20 includes a plurality of first reinforcement ribs 21 arranged at intervals along the bending radius direction of the bending section 12, and the second reinforcement member 30 includes a plurality of second reinforcement ribs 31, and the second reinforcement ribs 31 are arranged and connected to the first reinforcement ribs 21 in a one-to-one correspondence. Thus, the heat exchange medium in the plurality of sub-channels 13 in the bending section 12 can smoothly flow into the straight heat exchange section 11 under the guidance of the first reinforcement ribs 21 and the second reinforcement ribs 31, and in the embodiment in which the straight heat exchange section 11 and the bending section 12 are integrally formed, the first reinforcement rib 21 and the connected second reinforcement rib 31 can be integrally formed, that is, the heat exchange tube 10 can be bent by a single tube to form the straight heat exchange section 11 and the bending section 12, and the length of each straight heat exchange section 11 and the bending section 12 is more flexible, and is not limited by the internal first reinforcement ribs 21 and the second reinforcement ribs 31, which is conducive to improving production efficiency.

[0157] 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, and eliminating the need for splicing and sealing, which is conducive to reducing the risk of sealing failure. In addition, 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 the same, so that the first reinforcement 20 and the second reinforcement 30 can be bent together to reduce the processing difficulty of the heat exchange tube 10.

[0158] 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, a sleeve is 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 installation of the sleeve is not interfered 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.

[0159] In some embodiments, 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. 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.

[0160] In some embodiments of the present application, Figure 6-Figure 9 As shown, the bending section 12 and the first reinforcement member 20 are integrally formed. For example, they can be integrally formed by extrusion molding. The integral molding can save the assembly process of installing the first reinforcement member 20 in a small space in the bending section 12, thereby improving production efficiency. In addition, the first reinforcement member 20 is reliably connected to the bending section 12, and is not prone to relative movement during the bending molding process to affect the reinforcement effect.

[0161] 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 a second direction Y (for example Figure 5 The first direction X is perpendicular to the second direction Y. The bending section 12 connects the two straight heat exchange sections 11 arranged at intervals and is in a semicircular shape. The arrangement of the plurality of straight heat exchange sections 11 is orderly, which is more conducive to increasing the occupied space in the first direction X and the second direction Y, thereby increasing the heat exchange area and improving the heat exchange capacity.

[0162] In a specific embodiment, Figure 5 As shown, among any three adjacent straight heat exchange segments 11 along the second direction Y, the first end of the middle straight heat exchange segment 11 is connected to the first end of one of the adjacent straight heat exchange segments 11 through a bending segment 12, and the second end of the middle straight heat exchange segment 11 is connected to the second end of another adjacent straight heat exchange segment 11 through a bending segment 12.

[0163] Thus, from one end of 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 sections 11 and the bent sections 12 are relatively simple, and each bent section 12 is not easily interfered by the positions of other straight heat exchange sections 11 and bent sections 12 during the bending process, thereby improving production efficiency.

[0164] According to some embodiments of the present application, Fig.11 As shown, Fig.11A partial structural diagram of a battery 1000 provided for some embodiments of the present application. At least two straight heat exchange sections 11 extend at an angle, and the bending section 12 is arc-shaped and connects the two straight heat exchange sections 11 at an angle. By changing the bending angle of the bending 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 changeable. For example, the bending angle of the bending section 12 is 90°, and the corresponding two connected straight heat exchange sections 11 can be parallel to each other.

[0165] According to some embodiments of the present application, Fig.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.

[0166] Specifically, the battery 1000 may include a plurality of battery cells 210 , and the first heat exchange tube 102 is used to exchange heat with the plurality of battery cells 210 of the battery 1000 , so that the temperature of the battery 1000 can be limited within a safe operating temperature, thereby improving the operating reliability of the battery 1000 .

[0167] 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 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.

[0168] The second heat exchange channel 52 is bent to form a U-shaped area 50 , that is, in a direction from one end of the second heat exchange channel 52 toward the other end, the second heat exchange channel 52 extends along a U-shaped line to form a U-shaped area 50 .

[0169] 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.

[0170] It should be noted that, in this embodiment, the first heat exchange channel 51 is only 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, Fig.11The battery cell 210 extends in the second direction Y) and extends to a certain length toward the width direction (i.e., Fig.11 Alternatively, the first heat exchange channel 51 may extend along the width direction of the battery cell 210, 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.

[0171] 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.

[0172] 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, so that when the first heat exchange tube 102 performs heat exchange, 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.

[0173] It is understandable that, during the process of the heat exchange medium flowing in 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 and dissipates heat for the battery assembly 200, the heat of the battery cell 210 is gradually transferred to the heat exchange medium, so that the temperature of the heat exchange medium gradually increases during the process of flowing along the first heat exchange tube 102, and the temperature difference between the heat exchange medium and the battery cell 210 gradually decreases, and the heat exchange efficiency gradually decreases; when the heat exchange tube 10 heats and raises the temperature of the battery assembly 200, the heat in the heat exchange medium is gradually transferred to the battery cell 210, so that the temperature of the heat exchange medium gradually decreases during the process of flowing along the first heat exchange tube 102, and the temperature difference between the heat exchange medium and the battery cell 210 gradually decreases, and the heat exchange efficiency gradually decreases.

[0174] In this embodiment, when the heat exchange tube 10 is 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, 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 then 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 in the battery 1000 more uniform.

[0175] When the heat exchange tube 10 heats the battery assembly 200, the heat exchange medium may also flow from the first heat exchange channel 51 to the second heat exchange channel 52, but the heat exchange medium may also flow from the second heat exchange channel 52 to the first heat exchange channel 51. Exemplarily, when the heat exchange medium flows from the second heat exchange channel 52 to the first heat exchange channel 51, the battery cells 210 at the periphery of the battery assembly 200 may be heated first, and then the heat exchange medium heats the battery cells 210 at the middle of the battery assembly 200. Since the battery cells 210 at the periphery of the battery 1000 dissipate more heat to the external environment, the temperature of the battery cells 210 at the periphery of the battery 1000 is more likely to drop. The heat exchange medium first heats the battery cells 210 at the periphery of the battery 1000. The higher temperature heat exchange medium can increase the temperature of the battery cells 210 at 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 a small 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. 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.

[0176] In the above-mentioned 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 tend 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.

[0177] According to some embodiments of the present application, Fig.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.

[0178] That is, the plurality of first heat exchange parts 511 are connected in sequence, and the connection position of two connected first heat exchange parts 511 is bent. For example, the two connected first heat exchange parts 511 can be connected by a bending section 12. The number of the first heat exchange parts 511 can be two, three, four, five or more.

[0179] It should be noted that the shape of the first heat exchange portion 511 can be various, for example, the first heat exchange portion 511 can be linear or arc-shaped. The extension direction of the first heat exchange portion 511 can also be various, for example, it can extend along the length direction or thickness direction of the battery cell 210. In this way, multiple first heat exchange portions 511 are bent and connected in sequence, so that the first heat exchange channel 51 can form an S-shaped, X-shaped, V-shaped, etc. heat exchange channel.

[0180] In the above embodiment, on the one hand, by setting a plurality of 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, so that the heat exchange effect of the first heat exchange tube 102 can be improved; 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 a plurality of 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.

[0181] According to some embodiments of the present application, Fig.11 As shown, a plurality of first heat exchange parts 511 are arranged at intervals along the second direction Y, 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.

[0182] The phrase “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 may be arranged perpendicularly or intersectingly and non-perpendicularly. For example, the first direction X and the second direction Y may be arranged at an angle of 30°, 60°, 80°, 120°, 150° or 170°. Fig.11 As shown, the first direction X is the thickness direction of the battery cell 210, the second direction Y is the length direction of the battery cell 210, the first heat exchange part 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 parts 511 are bent and connected to form an S-shaped heat exchange channel, which can realize heat exchange for multiple battery cells 210.

[0183] In the above-mentioned embodiment, by setting the first heat exchange part 511 to extend in a straight line 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.

[0184] According to some embodiments of the present application, Fig.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 connected to 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.

[0185] 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 connected to the end of the third heat exchange part 522 away from the second heat exchange part 521.

[0186] The first end of the third heat exchange part 522 is connected to the second heat exchange part 521 at an angle, that is, the third heat exchange part 522 is connected to the second heat exchange part 521, and the third heat exchange part 522 and the second heat exchange part 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 part 522 is connected to the second heat exchange part 521 and the angle is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0187] The second end of the third heat exchange part 522 is connected to the first heat exchange channel 51 at an angle; that is, the second end of the third heat exchange part 522 is connected to the second heat exchange part 521, and the second end of the third heat exchange part 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 part 522 is connected to the first heat exchange channel 51 and the angle is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0188] 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 and is arranged 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 and the angle is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0189] 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.

[0190] In the above-mentioned 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, which is beneficial to improving 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 are convenient.

[0191] According to some embodiments of the present application, Fig.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.

[0192] 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 to the third heat exchange channel 53 through the first heat exchange channel 51, or from the third heat exchange channel 53 to the second heat exchange channel 52 through the first heat exchange channel 51.

[0193] 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.

[0194] 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 .

[0195] According to some embodiments of the present application, Fig.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.

[0196] 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, so that the third heat exchange channel 53 is also arranged on the circumferential outer side of the first heat exchange channel 51. In this way, the heat exchange area of ​​the first heat exchange tube 102 in the circumferential direction can be increased, and the heat exchange efficiency of the first heat exchange tube 102 at the circumferential side position can be improved.

[0197] Furthermore, the third heat exchange channel 53 and the fourth heat exchange part 523 can be arranged inside and outside the same side of the first heat exchange channel 51, so that the heat exchange area at this position can be further increased and the heat exchange efficiency can be improved. In addition, since the third heat exchange channel 53 and the fourth heat exchange part 523 are respectively located at the two ends of the first heat exchange channel 51 in the flow direction of the heat exchange medium, the third heat exchange channel 53 and the fourth heat exchange part 523 can exchange heat with the same area of ​​the battery assembly 200, thereby improving the temperature uniformity of the area.

[0198] 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 temperature of 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.

[0199] 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 which is 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.

[0200] In the above-mentioned 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.

[0201] According to some embodiments of the present application, Fig.11 As shown, the third heat exchange channel 53 extends along the second direction Y in a direction 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 arranged at an angle.

[0202] 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 that is 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 that is farthest from the second heat exchange part 521.

[0203] Furthermore, 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. At this time, the third heat exchange channel 53 and the fourth heat exchange part 523 are arranged on the same outer side of the circumference of the first heat exchange part 511. The third heat exchange channel 53 and the fourth heat exchange part 523 are respectively located at the two ends of the first heat exchange channel 51 in the fluid flow direction. When the third heat exchange channel 53 and the fourth heat exchange part 523 exchange heat with the same area of ​​the battery assembly 200 together, the temperature difference at the edge of the battery assembly 200 can be balanced, and the temperature uniformity at the edge of the battery assembly 200 can be improved.

[0204] In the above-mentioned embodiment, by arranging the third heat exchange channel 53 to extend along the second direction Y in a 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.

[0205] like Figure 3 and Fig.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. Therefore, by adopting the above-mentioned heat exchange tube 10, the heat exchange area can be increased, the heat exchange performance can be improved, and the undesirable conditions such as collapse, wrinkling, and excessive thinness during the forming process of the bending section 12 can be improved, the structural strength of the bending section 12 can be improved, and the heat exchange tube 10 can have a stronger pressure resistance during the application of heat exchange, which is conducive to improving the service life.

[0206] 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 with other structures to achieve the flow of heat exchange medium into and out of the heat exchange tube 10 .

[0207] 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.

[0208] 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 the 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.

[0209] It is understandable that the number of heat exchange tubes 10 of the heat exchange element 100 may be one, two, three, four or more. When the number of heat exchange tubes 10 is multiple, 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 multiple heat exchange tubes 10 may all be formed as the first heat exchange tube 102.

[0210] Among them, in some specific embodiments, such as Fig.11 As shown, a plurality of heat exchange tubes 10 are arranged at intervals along the second direction Y, for example Fig.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. Further, 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. Further, the two heat exchange tubes 10 at both 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.

[0211] In other embodiments, a plurality of heat exchange tubes 10 are arranged around each other. Fig.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. Further, the two heat exchange tubes 10 can be formed into first heat exchange tubes 102. Fig.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 the three heat exchange tubes 10 can all be formed into first heat exchange tubes 102 .

[0212] 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.

[0213] In the above-mentioned embodiment, by arranging the heat exchange element 100 with one or more heat exchange tubes 10, and the multiple heat exchange tubes 10 are arranged at intervals or around each other along the second direction Y, 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.

[0214] According to some embodiments of the present application, Fig.12 As shown, the plurality of 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 in the U-shaped area 50 of the first heat exchange tube 102. In the above embodiment, by providing a plurality of 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.

[0215] According to some embodiments of the present application, Fig.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 a portion 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 .

[0216] It is understandable that only a portion of the first heat exchange channel 51 of the first heat exchange tube 102 may be disposed in the U-shaped region 50 of the second heat exchange tube 103 , or the entire first heat exchange channel 51 may be disposed in the U-shaped region 50 of the second heat exchange tube 103 .

[0217] For example Fig.13As shown, the plurality of heat exchange tubes 10 include a first heat exchange tube 102 and two second heat exchange tubes 103 , and the two second heat exchange tubes 103 have the same structure as the first heat exchange tube 102 .

[0218] In the above-mentioned 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 a portion 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 a portion 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, thereby further increasing the heat exchange effect of the heat exchange component 100 and improving the temperature uniformity of the battery 1000.

[0219] 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.

[0220] In some embodiments, Figure 2 and Fig.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 integrally stamped and formed, and the box body 310 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 is 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 integrally stamped and formed, the connection between the bottom wall 311 and the surrounding wall 312 does not need to consider the sealing problem, and the sealing effect can be improved, so that muddy water can be prevented from penetrating into the box body 310 from the connection between the bottom wall 311 and the surrounding wall 312 to affect the battery assembly 200, thereby improving the reliability of the battery 1000. Moreover, the integrally stamped box body 310 does not need to be spliced, which can improve production efficiency. The battery cell 210 may generate heat during operation, or the battery cell 210 may need to be heated in a low temperature environment to keep the battery cell 210 in a suitable temperature range. The heat exchange tube 10 may be provided to adjust the temperature of the battery cell 210, improve the stability of the battery cell 210, and improve the endurance of the battery 1000.

[0221] In some embodiments of the present application, Fig.14 and Fig.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, and 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 attached to the outer wall of the box body 310. The second thermostat 120 is disposed in the box assembly 300 and is located between the battery assembly 200 and the box assembly 300. The third thermostat 130 is disposed in the box assembly 300 and is located between two adjacent battery cells 210.

[0222] For example, the battery 1000 may include only one of the first thermostat 110, the second thermostat 120, and the third thermostat 130, or 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, the thermostat may be set at an appropriate position according to actual conditions to meet the temperature regulation requirements of the battery 1000.

[0223] The specific location of the first temperature regulating member 110 outside the box body 310 is not limited, for example, Fig.14 At least part of the first temperature regulating member 110 can be disposed below the bottom wall 311 of the box body 310, so as to exchange heat with the battery assembly 200 in a wider range and improve the temperature regulating effect on the battery assembly 200. For another example, at least part of the first temperature regulating member 110 can also be disposed outside the surrounding wall 312 of the box body 310.

[0224] For example, Fig.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 effects. 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.

[0225] The specific location of the second temperature regulating member 120 in the box assembly 300 is not limited, for example, Fig.14, at least part of the second temperature regulating member 120 can 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, so as to exchange heat with the battery assembly 200 in a wider range, thereby improving the temperature regulating effect on the battery assembly 200. For another example, at least part of the second temperature regulating member 120 can 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, so as to exchange heat with the battery assembly 200 in a wider range, thereby improving the temperature regulating effect on the battery assembly 200.

[0226] The specific location of the third temperature regulating member 130 in the box assembly 300 is not limited, for example, Fig.15 The adjacent battery cells 210 in the battery assembly 200 may have their large surfaces facing each other, and the third temperature regulating member 130 may be disposed between the large surfaces of the adjacent battery cells 210 to enhance the temperature regulating effect on the battery cells 210 .

[0227] For example, in combination Fig.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, and 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.

[0228] Usually, the heat exchange tube used in the battery is a double-layer brazed plate structure, that is, it is brazed by two layers of plates, and a heat exchange channel is formed between the two layers of plates. In the present application, for example, the flat tube can be spliced ​​by multiple sections of extruded tubes, and the thickness of the flat tube can be much smaller than the thickness of the double-layer brazed plate structure, so that it can occupy a smaller space and increase the capacity of the battery 1000.

[0229] 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, Fig.16 The box assembly 300 may also 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 set in the expansion beam 330 for temperature adjustment, thereby constituting a part of the thermal management system.

[0230] like Figure 1 As shown, the electric device according to the embodiment of the present application includes the battery 1000 according to the embodiment of the present application. The electric device can be any of the aforementioned devices or systems using the battery 1000. Since the performance of the battery 1000 is improved, it is beneficial to improve the working power performance of the electric device.

[0231] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0232] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: The heat exchange tubes include a plurality of heat exchange tubes, which are arranged at intervals along the second direction or arranged around each other, at least one of which is a first heat exchange tube, which includes a first heat exchange channel and a second heat exchange channel, which is bent to form a U-shaped area, and the first heat exchange channel is bent in the U-shaped area and is connected to the second heat exchange channel, 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 the plurality of straight heat exchange sections; Among them, a first reinforcement is provided in at least one of the bending sections, and the bending section includes two wall surfaces arranged opposite to each other. The first reinforcement connects the wall surfaces on both sides opposite to each other. The first reinforcement includes a plurality of first reinforcement ribs, and the plurality of first reinforcement ribs are arranged at intervals along the bending radius direction of the bending section, and the heat exchange flow channel in the bending section is divided into a plurality of sub-flow channels, and the first reinforcement ribs extend obliquely relative to the wall surfaces.

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 wall surface is a plane.

4. The battery according to claim 1, characterized in that The inclination directions of the plurality of first reinforcing ribs are the same.

5. The battery according to claim 1, 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 directions.

6. The battery according to claim 1, characterized in that The plurality of first reinforcing ribs are arranged at equal intervals.

7. The battery according to claim 1, 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.

8. The battery according to claim 7, 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 1~3, 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.

9. The battery according to claim 1, characterized in that The maximum width of at least two of the sub-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.

10. The battery according to claim 9, characterized in that H / L is 0.8~1.

2.

11. The battery according to claim 1, characterized in that The plurality of first reinforcing ribs are arranged symmetrically or centrally symmetrically about the midpoint of the bending section.

12. The battery according to claim 1, 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.

13. The battery according to claim 1, characterized in that A second reinforcement member is provided in the straight heat exchange section.

14. The battery according to claim 13, characterized in that The second reinforcement member includes a second reinforcement rib, and the second reinforcement rib is arranged 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, and the second reinforcement ribs are arranged in a one-to-one correspondence with and connected to the first reinforcement ribs.

15. The battery according to claim 1, characterized in that The heat exchange tube is formed by bending a single tube; and / or the heat exchange tube is a flat tube.

16. The battery according to claim 1, characterized in that The bending section and the first reinforcement member are integrally formed.

17. The battery according to claim 1, 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, and the bending section connects two of the straight heat exchange sections arranged at intervals and is in a semicircular arc shape.

18. The battery according to claim 17, 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.

19. The battery according to any one of claims 1 to 16, characterized in that At least two of the straight heat exchange sections extend at an angle, and the bending section is arc-shaped and connects the two straight heat exchange sections at the angle.

20. The battery according to claim 1, 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.

21. The battery according to claim 1, 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, is connected to the second heat exchange part at an angle, and extends along the third side circumference of the first heat exchange channel.

22. The battery according to claim 21, 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.

23. The battery according to claim 22, 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 a side of the first heat exchange channel away from the third heat exchange part. The third heat exchange channel is connected to 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 in 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.

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

25. The battery according to claim 24, characterized in that The battery includes a temperature regulating member, the temperature regulating member includes at least one of a first temperature regulating member, a second temperature regulating member and a third temperature regulating member, at least one of the first temperature regulating member, the second temperature regulating member and the third temperature regulating member 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 arranged 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.

26. An electrical device, characterized in that: Comprising a battery according to any one of claims 1-25.

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