Battery device and electric device

Abstract

A battery device (100) and an electric device. The battery device (100) comprises: a case (10) and a battery cell assembly (20), wherein the battery cell assembly (20) is provided in the case (10), the battery cell assembly (20) comprises a plurality of battery cells (301), and the plurality of battery cells (301) in the battery cell assembly (20) are stacked in a second direction, and the following relationship is satisfied.

Description

Battery devices and electrical appliances

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202411553843.4, filed on November 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of batteries, and more specifically, to a battery device and an electrical device. Background Technology

[0004] In today's technological advancements, optimizing battery device performance is paramount, placing higher demands on the arrangement of individual battery cells. On one hand, it's crucial to maximize the utilization of space within the enclosure, storing more energy within a limited area. On the other hand, the compactness of multiple battery cells is indispensable; a close arrangement reduces volume and adapts to a wider range of applications. Summary of the Invention

[0005] This disclosure aims to at least address one of the technical problems existing in the prior art. To this end, one object of this disclosure is to provide a battery device that can reduce its footprint within the housing and make the layout of the battery cells more compact.

[0006] A battery device according to a first aspect embodiment of the present disclosure includes: a housing and a battery cell assembly, the battery cell assembly being disposed within the housing, the battery cell assembly comprising a plurality of battery cells, the plurality of battery cells being stacked along a second direction, and satisfying the following: S is the sum of the number of battery cells in the plurality of battery cell assemblies, W b t is the inner width of the housing, t is the width of each battery cell, A is the length of each battery cell, and W is the inner width of the housing. c When the second direction is the width direction of the housing, the set gap that the battery cell assembly and the side wall of the housing must satisfy in the width direction of the housing; W d When the second direction is the length direction of the housing, it is the set gap that the battery cell assembly and the side wall of the housing need to satisfy in the width direction of the housing.

[0007] The battery device disclosed herein, with multiple battery cells arranged laterally, can effectively reduce the area occupied within the casing, fully utilize the space in the width direction of the casing, and reduce the vertical occupancy of the casing, resulting in a more compact layout of the battery cell assembly. This improves the space utilization rate within the casing, freeing up more installation space for other components, and also makes the installation of the battery device more flexible within limited spaces.

[0008] In some embodiments of this disclosure, a predetermined gap W must be satisfied between the battery cell assembly and the side wall of the housing in the width direction of the housing. c Satisfying: 10mm≤W c ≤130mm; the set gap W between the battery cell assembly and the side wall of the housing in the width direction of the housing must meet. d Satisfying: 10mm≤W d ≤130mm.

[0009] In the example above, by setting a reasonable gap range, heat dissipation space can be provided for individual battery cells, preventing overheating. Simultaneously, it can buffer external impacts to a certain extent, protecting the battery cells. An appropriate gap ensures the safe and stable operation of the battery pack and extends battery life. Furthermore, this gap also provides assembly space for other structural components, facilitating the overall layout and installation of the battery pack.

[0010] In some embodiments of this disclosure, W c Greater than W d .

[0011] In the example above, the larger W c The gaps provide better heat dissipation channels for individual battery cells in the width direction, reducing the risk of battery performance degradation due to heat buildup. Secondly, during installation and maintenance, W... c The larger clearances allow operators to maneuver the individual battery cells across the width of the enclosure, improving work efficiency. At the same time, ample space is provided for potential wiring and other structural elements.

[0012] In some embodiments of this disclosure, the housing includes a top plate and a bottom plate spaced apart along the height direction of the housing, and a terminal post is provided on the side of the battery cell facing the top plate. In the height direction of the housing, the height Hi of the battery cell satisfies: 110mm≤Hi≤140mm, wherein the height Hi of the battery cell is the distance between the surface of the terminal post facing the top plate and the surface of the bottom plate facing the top plate.

[0013] In the examples above, the shorter battery cells occupy less space in the height direction of the enclosure, which is beneficial for designing a low-profile enclosure. A low-profile enclosure can lower the overall center of gravity of the device, improving stability. It is also more advantageous in applications where height is limited, such as where there is limited space under the vehicle in electric vehicles. This design improves space utilization, provides more possibilities for installing other components, and also helps optimize the vehicle's aerodynamic performance.

[0014] In some embodiments of this disclosure, the battery device further includes a heat exchange assembly for heat exchange with the battery cell. The heat exchange assembly includes a first heat exchange portion and a second heat exchange portion. The first heat exchange portion is bent and extends to define a U-shaped region, and the second heat exchange portion is bent and disposed within the U-shaped region and bent and connected to one end of the first heat exchange portion.

[0015] In the example above, the U-shaped area formed by the bending and extension of the first heat exchange section better conforms to the outer contour of the battery cell assembly. Especially when the battery cells are arranged laterally along the width of the housing, it can fully cover the battery cells, ensuring uniform heat exchange. The second heat exchange section is bent and arranged within the U-shaped area and connected to the first heat exchange section, further increasing the heat exchange area and improving heat exchange efficiency. This design can effectively remove the heat generated by the battery cells during operation, preventing the battery temperature from becoming too high, thereby extending the battery's lifespan and ensuring stable battery performance. Simultaneously, efficient heat exchange helps improve the safety of the entire battery device and reduces the risk of thermal runaway.

[0016] In some embodiments of this disclosure, the battery device further includes a heat exchange assembly for heat exchange with the battery cell assembly. The heat exchange assembly is disposed on at least one side of the battery cell assembly in the height direction of the housing. The heat exchange assembly includes at least one heat exchange unit, which has a heat exchange channel portion. The heat exchange channel portion has a heat exchange channel for conducting a heat exchange medium. The heat exchange channel portion includes a straight pipe section extending in a straight line and a curved pipe section extending in an arc. In the extension direction of the heat exchange unit, the curved pipe section connects two adjacent straight pipe sections. The ratio of the bending radius R of the curved pipe section to the width W of the heat exchange channel portion is k, where k is greater than 0.5.

[0017] In the above technical solution, the heat exchange component for regulating the temperature of the battery cell is configured to include at least one heat exchange unit. By configuring the heat exchange channel of the heat exchange unit to include a straight pipe section and a bent pipe section connected between the straight pipe sections, the heat exchange channel can be bent and extended, increasing the heat exchange area between the heat exchange unit and the battery cell assembly, and improving the temperature regulation efficiency of the heat exchange component for the battery cell assembly. Furthermore, by making the ratio of the bending radius of the bent pipe section to the width of the heat exchange channel greater than 0.5, it is convenient to bend and shape the heat exchange channel during the processing of the bent heat exchange unit.

[0018] In some embodiments, the value of k ranges from 1.0 to 1.5.

[0019] In the above technical solution, the ratio k of the bending radius of the bend section to the width of the heat exchange channel is not less than 1.0. This reduces the process difficulty of the heat exchange unit during the bending process. Furthermore, the ratio k of the bending radius of the bend section to the width of the heat exchange channel is not greater than 1.5, which allows for a larger heat exchange area of ​​the heat exchange unit. By setting the ratio k of the bending radius of the bend section to the width of the heat exchange channel between 1.0 and 1.5, the bending process difficulty and heat exchange area of ​​the heat exchange unit can be better balanced, thereby reducing the processing difficulty of the heat exchange component and increasing the heat exchange area.

[0020] In some embodiments, the plurality of straight pipe segments in a single heat exchange channel section include a plurality of first straight pipe segments spaced apart sequentially along a first direction, each first straight pipe segment extending along a second direction, and the plurality of bent pipe segments in a single heat exchange channel section include a first bent pipe segment, the first bent pipe segment connecting the same end of two adjacent first straight pipe segments along the second direction, the orthographic projections of the first straight pipe segment and the first bent pipe segment along a third direction are both located within the orthographic projection of the battery cell assembly along the third direction, and the third direction, the second direction and the first direction intersect each other.

[0021] In the above technical solution, by arranging multiple first straight pipe segments of a single heat exchange unit along a first direction and connecting two adjacent first straight pipe segments through a first bent pipe segment, the pipe arrangement density of the heat exchange unit can be increased, thereby further increasing the heat exchange area of ​​the heat exchange unit and further improving the temperature regulation efficiency of the heat exchange component for the battery cell component.

[0022] In some embodiments, the extension length L of the first straight pipe section is greater than or equal to 50 mm.

[0023] In the above technical solution, during the process of using a bending die to bend the heat exchange flow channel of the heat exchange unit to form a first straight pipe section and a first bent pipe section connecting two adjacent first straight pipe sections, it is necessary to clamp and fix the first straight pipe section to bend and form the first bent pipe section. By ensuring that the extension length of the first straight pipe section arranged along the first direction is not less than 50mm, the first straight pipe section can have a longer length for clamping and fixing, thereby improving the reliability of clamping and fixing the first straight pipe section and thus improving the bending and forming quality of the heat exchange unit.

[0024] In some embodiments, the distance d1 between two adjacent first straight pipe sections in the same heat exchange channel section in the first direction is greater than the width W of the first straight pipe section.

[0025] In the above technical solution, by making the distance d1 between two adjacent first straight pipe sections in the first direction in the same heat exchange channel section greater than the width W of the first straight pipe section, the bending process difficulty of the first bent pipe section of the heat exchange unit can be reduced.

[0026] In some embodiments, the ratio of the distance d1 between two adjacent first straight pipe sections in the first direction to the width W of the first straight pipe section in the same heat exchange channel is less than 2.

[0027] In the above technical solution, by ensuring that the distance d1 between two adjacent first straight pipe segments in the same heat exchange channel section in the first direction is greater than the width W of the first straight pipe segment, and simultaneously ensuring that the ratio of the distance d1 between two adjacent first straight pipe segments in the same heat exchange channel section in the first direction to the width W of the first straight pipe segment is less than 2, the ratio of the distance d1 between two adjacent first straight pipe segments in the same heat exchange channel section in the first direction to the width W of the first straight pipe segment is greater than 1 and less than 2. This reduces the bending process difficulty of the first bend pipe segment of the heat exchange unit while allowing for a larger arrangement density of multiple first straight pipe segments along the first direction, thus effectively balancing the bending process difficulty and heat exchange area of ​​the heat exchange unit.

[0028] In some embodiments, the ratio of the extension length of the first straight pipe section to the extension length of the first bent pipe section is 0.7 to 2.

[0029] In the above technical solution, by ensuring that the ratio of the extension length of the first straight pipe section to the extension length of the first bent pipe section is not less than 0.7, the extension length of the first bent pipe section can be larger, thereby giving the first bent pipe section a larger bending radius. This reduces the bending process difficulty of the first bent pipe section. At the same time, by ensuring that the ratio of the extension length of the first straight pipe section to the extension length of the first bent pipe section is not greater than 2, the extension length of the first bent pipe section is appropriate so that the spacing between adjacent first straight pipe sections along the first direction is not too large. By ensuring that the ratio of the extension length of the first straight pipe section to the extension length of the first bent pipe section is 0.7 to 2, the bending process difficulty and heat exchange area of ​​the heat exchange unit can be well balanced.

[0030] In some embodiments, all the first straight pipe segments and all the first bent pipe segments in a single heat exchange channel constitute a bending body, and there are multiple heat exchange units, with the bending bodies of the multiple heat exchange units arranged sequentially along the first direction.

[0031] In the above technical solution, setting multiple heat exchange units can increase the heat exchange area of ​​the heat exchange component. Furthermore, arranging the bent bodies of multiple heat exchange units sequentially along the first direction can increase the arrangement density of the multiple heat exchange units, thereby increasing the arrangement density of the pipeline of the entire heat exchange component and further improving the heat exchange area of ​​the heat exchange component. This can further enhance the heat exchange efficiency of the heat exchange component for the battery cell module.

[0032] In some embodiments, the distance between two adjacent first straight pipe segments in the same bending body in the first direction is d1, and the distance between two adjacent first straight pipe segments in the first direction in two adjacent bending bodies is d2, where d2 is less than d1.

[0033] In the above technical solution, taking advantage of the fact that the distance d2 between two adjacent first straight pipe segments in the first direction of two adjacent bending bodies is basically unaffected by the bending process, by setting the distance between two adjacent first straight pipe segments in the first direction of two adjacent bending bodies to be relatively small, it is beneficial to increase the pipe layout density of the heat exchange components without increasing the difficulty of the bending process, thereby increasing the heat exchange area of ​​the heat exchange components.

[0034] In some embodiments, all the first straight pipe segments and all the first bends in a single heat exchange channel constitute a bending body, and the plurality of straight pipe segments in a single heat exchange channel include a second straight pipe segment. The second straight pipe segment in the same heat exchange channel is located on at least one side of the bending body along the second direction, and the second straight pipe segment extends along the first direction and is connected to the first straight pipe segment in the same heat exchange channel.

[0035] In the above technical solution, by setting the second straight pipe section in the same heat exchange channel section on at least one side of the bending body along the second direction, the pipe layout density of a single heat exchange channel section can be increased, and the heat exchange area of ​​the heat exchange unit can be increased.

[0036] In some embodiments, the minimum distance d3 between the first bend and the second straight section in the same heat exchange channel section in the second direction is greater than or equal to 20 mm.

[0037] In the above technical solution, by setting the minimum distance d3 between the first bent pipe section and the second straight pipe section in the same heat exchange channel section to be no less than 20mm, a larger distance can be achieved between the second straight pipe section and the first bent pipe section. During the bending process of the heat exchange channel section using the bending die, the risk of interference between the bending die and the second straight pipe section during the bending process of the first bent pipe section can be reduced. While achieving a high arrangement density in the heat exchange channel section, the bending process difficulty of the heat exchange channel section can be reduced.

[0038] In some embodiments, all the first straight pipe segments and all the first bent pipe segments in a single heat exchange channel constitute a bent body. There are two heat exchange units, and the bent bodies of the two heat exchange units are arranged along the first direction. The two heat exchange units are a first heat exchange unit and a second heat exchange unit, respectively. The first heat exchange unit includes one second straight pipe segment, which is located on one side of the bent body of the first heat exchange unit along the second direction. The second heat exchange unit includes two second straight pipe segments, which are located on both sides of the bent body of the second heat exchange unit along the second direction. The bent body has a first side and a second side opposite to each other in the second direction. The second straight pipe segment of the first heat exchange unit and one of the second straight pipe segments of the second heat exchange unit are both located on the first side and arranged along the first direction. The other second straight pipe segment of the second heat exchange unit is located on the second side and extends to one side of the bent body of the first heat exchange unit along the second direction.

[0039] In the above technical solution, setting two heat exchange units can increase the heat exchange area of ​​the heat exchange assembly. Furthermore, arranging the bent bodies of the two heat exchange units sequentially along the first direction increases the arrangement density of the two heat exchange units, resulting in a larger pipe arrangement density for the entire heat exchange assembly. This further increases the heat exchange area of ​​the heat exchange assembly and improves the heat exchange efficiency of the heat exchange assembly for the battery cell assembly. Moreover, by rationally arranging the second straight pipe sections of the first and second heat exchange units on opposite sides of the bent body along the second direction, the pipe arrangement density of the heat exchange assembly can be further increased, thereby increasing the heat exchange area of ​​the heat exchange assembly.

[0040] In some embodiments, the minimum distance d3 between the first bend section and the second straight section in the same heat exchange channel section in the second direction, and the minimum distance d4 between the second straight section located on the second side in the second heat exchange unit and the first bend section in the first heat exchange unit in the second direction, are both less than d3.

[0041] In the above technical solution, by taking advantage of the fact that the distance between the first bend section and the second straight section of different heat exchange units is not limited by the bending process, the distance between the first bend section and the second straight section of different heat exchange units can be set to be smaller, which can increase the pipe layout density of the heat exchange components and thus increase the heat exchange area of ​​the heat exchange components.

[0042] In some embodiments, the battery cell assembly includes one or more rows of battery cells arranged along the first direction, and each row of battery cells includes a plurality of battery cells arranged along the second direction.

[0043] In the above technical solution, by setting the battery cell assembly to include one or more battery cell rows arranged along a first direction, and each battery cell row including multiple battery cells arranged along a second direction, the multiple battery cells in the battery cell assembly can be arranged in an orderly and compact manner, thereby increasing the battery capacity. Furthermore, by making the arrangement direction of the multiple battery cells in each battery cell row intersect with the extension direction of the first straight pipe segment, the heat conduction contact between each first straight pipe segment and the multiple battery cells in a single battery cell row can be maximized, allowing the single first straight pipe segment to exchange heat with the multiple battery cells in the battery cell row, thereby improving heat exchange efficiency and making the heat exchange of the multiple battery cells in the battery cell row more uniform.

[0044] In some embodiments, at least one of the heat exchange units satisfies the following relationship: W = (N*AB) / (n*N + (n*N-1)*(2k-1)), where N is the total number of battery cell rows, the number of the first straight pipe segments corresponding to each battery cell row is the same and is n, A is the dimension of a single battery cell row in the first direction, the two sides of the bending body along the first direction are the first side edge and the second side edge, the two sides of the battery cell row that exchange heat with the same bending body along the first direction are the first side edge and the second side edge, the bending body is located between the first side edge and the second side edge, the first side edge is adjacent to the first side edge and the distance between the first side edge and the first side edge in the first direction is B1, the second side edge is adjacent to the second side edge and the distance between the second side edge and the second side edge in the first direction is B2, and B is the sum of B1 and B2.

[0045] In the above technical solution, by ensuring that at least one heat exchange unit satisfies the formula: W=(N*AB) / (n*N+(n*N-1)*(2k-1)), this formula can be used as a bending selection design parameter constraint. When processing and bending to form a heat exchange unit, the selection can be made quickly after inputting the requirements based on this selection model, making it more convenient to select the processing bending process for heat exchange units of different specifications and sizes.

[0046] In some embodiments, the width W of the heat exchange channel is greater than the thickness t of the battery cell.

[0047] In the above technical solution, by making the width W of the heat exchange channel greater than the thickness t of the battery cell, the width of the heat exchange channel can be larger, the heat exchange area of ​​the heat exchange channel can be increased, and thus the heat exchange efficiency of the heat exchange component to the battery cell component can be improved.

[0048] In some embodiments, the ratio of the width W of the heat exchange channel to the thickness t of the battery cell is less than 2.

[0049] In the above technical solution, while making the width W of the heat exchange channel greater than the thickness t of the battery cell to increase the heat exchange area of ​​the heat exchange channel, the ratio of the width W of the heat exchange channel to the thickness t of the battery cell is less than 2. This can avoid the difficulty of bending process caused by the excessive width of the heat exchange channel and the insufficient structural strength caused by the excessive width of the heat exchange unit. Thus, the bending process of the heat exchange channel is less difficult and the structural strength of the heat exchange channel is higher.

[0050] In some embodiments, the heat exchange channel is formed as a heat exchange flat tube, the thickness direction of the heat exchange channel is consistent with the third direction, and at least one side surface of the heat exchange channel in the thickness direction is in thermal contact or thermally connected to the battery cell assembly.

[0051] In the above technical solution, by setting the heat exchange channel section as a heat exchange flat tube, and making at least one side surface of the heat exchange channel section in the thickness direction thermally contact or thermally connect with the battery cell assembly, the thermal conductivity area between the heat exchange channel section and the battery cell assembly can be increased, thereby improving the heat exchange efficiency of the heat exchange unit for the battery cell assembly.

[0052] In some embodiments, the surface of the heat exchange channel that is in thermal contact or thermally connected to the battery cell assembly is a heat exchange surface, and the heat exchange surface is a plane.

[0053] In the above technical solution, by setting the heat exchange surface of the heat exchange channel to a plane, the heat exchange channel can fit better with the battery cell, increasing the heat conduction area between the heat exchange channel and the battery cell assembly, and improving the heat exchange efficiency of the heat exchange unit for the battery cell assembly.

[0054] In some embodiments, the sum of the projected areas of all the heat exchange units along the third direction is the first projected area, and the sum of the projected areas of all the battery cells along the third direction is the second projected area, wherein the ratio of the first projected area to the second projected area is greater than 1 / 3.

[0055] In the above technical solution, by making the ratio of the total projected area of ​​all heat exchange units along the third direction to the total projected area of ​​all battery cells along the third direction greater than 1 / 3, the heat conduction area between the heat exchange units and the battery cell assembly can be larger, resulting in higher heat exchange efficiency of the heat exchange assembly to the battery cell assembly.

[0056] In some embodiments, the inner wall of the housing is formed with a receiving groove, the shape of which is adapted to the shape of the heat exchange unit, and the heat exchange unit is arranged in the receiving groove.

[0057] In the above technical solution, by setting a receiving groove on the inner wall of the box for arranging the heat exchange unit, the installation and positioning of the heat exchange unit is facilitated.

[0058] In some embodiments, the inner wall of the housing is formed with a plurality of ribs, which cooperate to define the receiving groove.

[0059] In the above technical solution, by forming multiple ribs on the inner wall of the box and defining the receiving groove through the cooperation of the multiple ribs, the forming process of the receiving groove is relatively convenient, and the multiple ribs can improve the structural strength of the box.

[0060] In some embodiments, portions of the housing protrude inward to form a plurality of the ribs.

[0061] In the above technical solution, by making a portion of the box body protrude inward to form multiple ribs, the processing of the ribs is facilitated, and the structural strength of the box body is improved by using multiple ribs without increasing the weight of the box body.

[0062] In some embodiments, the housing includes a base plate, and the heat exchange assembly is mounted on the base plate.

[0063] In the above technical solution, by setting the heat exchange components on the bottom plate of the housing, the heat exchange components are located at a low position inside the housing, which facilitates the installation and fixing of the heat exchange components and makes the center of gravity of the battery device lower, making it more stable and reliable.

[0064] In some embodiments, the ratio of the dimension of the housing in the first direction to the dimension of the housing in the second direction is greater than 2, and the second direction intersects the first direction.

[0065] In the above technical solution, by making the size of the battery pack in the first direction significantly larger than the size of the pack in the second direction, the battery pack can be made to be roughly rectangular in shape. When the battery pack is applied to a vehicle, the first direction of the pack can be placed along the longitudinal direction of the vehicle, which can make full use of the longitudinal space of the vehicle and help to improve the battery pack's capacity.

[0066] In some embodiments, the ratio of the dimension of the housing in a third direction to the dimension of the housing in a second direction is less than 0.3, and the third direction intersects with the second direction.

[0067] In the above technical solution, by making the dimensions of the housing smaller in the vertical direction, the battery device can be made flat overall. When the battery device is used in a vehicle, it can reduce the space occupied by the battery device in the Z-direction of the vehicle, which is beneficial to the layout of other components in the vehicle. Furthermore, when the battery device is installed at the bottom of the vehicle, since the battery device occupies less space in the Z-direction, the bottom height of the battery device will not be too low, which will make it easy to be scratched and damaged. During the vehicle's operation, the risk of the battery device being scratched and damaged can be reduced.

[0068] In a second aspect, the present invention provides an electrical device, comprising: a battery device according to the first aspect embodiment of the present invention.

[0069] In the above technical solution, by setting the above-mentioned battery device, the heat exchange component of the battery device has a high temperature regulation efficiency for the battery cell assembly, and the heat exchange unit of the heat exchange component is convenient to bend and shape the heat exchange channel during the processing and bending process.

[0070] In some embodiments, the electrical device is a vehicle, and the longitudinal direction of the vehicle is a first direction.

[0071] In the above technical solution, when the battery device is used in a vehicle and the longitudinal direction of the vehicle is the first direction, the heat exchange component of the battery device has a high temperature regulation efficiency for the battery cell components, which can improve the safety of the vehicle during driving; and when the length direction of the battery device is placed along the longitudinal direction of the vehicle, the longitudinal space of the vehicle can be fully utilized, which is beneficial to increasing the battery capacity.

[0072] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0073] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0074] Figure 1 is a schematic diagram of a battery device according to some embodiments of the present disclosure.

[0075] Figure 2 is an exploded view of a battery device according to some embodiments of the present disclosure from one angle.

[0076] Figure 3 is an exploded view of a battery device according to some embodiments of the present disclosure from another angle.

[0077] Figure 4 is a schematic diagram of the structure of the base plate and battery cell assembly of a battery device according to some embodiments of the present disclosure.

[0078] Figure 5 is a schematic diagram of the cooperation between the heat exchange component and the battery cell component in some embodiments of this disclosure.

[0079] Figure 6 is a front view of a heat exchange assembly according to some embodiments of this disclosure.

[0080] Figure 7 is a cross-sectional view along line GG in Figure 6.

[0081] Figure 8 is an enlarged view of point H in Figure 7.

[0082] Figure 9 is a schematic diagram of an electrical device according to some embodiments of the present disclosure.

[0083] Reference numerals: 1000, Electrical device; 100, Battery device; 10, Housing; 11, Base plate; 111, Rib; 112, Receiving groove; 12, Mounting beam; 13, Top cover; 20, Battery cell assembly; 30, Battery cell row; 301, Battery cell; 31, First side edge; 32, Second side edge; 50, Heat exchange assembly; 5, Heat exchange unit; 5a, Heat exchange flow channel; 51a, Heat exchange flow channel; 511a, Sub-flow channel; 5b, Flow divider; 51, Straight pipe section; 511, First straight pipe section; 512, Second straight pipe section; 513, Third straight pipe section; 514, Fourth straight pipe section; 5 2. Bend section; 521. First bend section; 522. Second bend section; 523. Third bend section; 524. Fourth bend section; 53. Bending body; 531. First side; 532. Second side; 54. Heat exchange surface; 501. First heat exchange unit; 502. Second heat exchange unit; 60. Liquid inlet / outlet structure; 6. Manifold; 61. Liquid inlet; 62. Liquid outlet; 63. Liquid outlet chamber; 200. Body. Detailed Implementation

[0084] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0085] Unless otherwise defined, all technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used in the specification of this disclosure and the application is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this disclosure are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this disclosure are used to distinguish different objects, and not to describe a particular order or hierarchy.

[0086] In this disclosure, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0087] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0088] In this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this disclosure, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0089] In the embodiments of this disclosure, the same reference numerals denote 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 this disclosure shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this disclosure.

[0090] In this disclosure, "multiple" means two or more (including two).

[0091] In the embodiments of this disclosure, unless otherwise specified, all implementation methods and optional implementation methods of this disclosure can be combined with each other to form new technical solutions.

[0092] In the embodiments of this disclosure, unless otherwise specified, all technical features and optional technical features of this disclosure can be combined with each other to form new technical solutions.

[0093] In embodiments of this disclosure, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via busbars. For example, a battery cell assembly is typically formed by arranging multiple battery cells; a battery cell assembly may also be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module may be formed by bundling multiple battery cells together with cable ties.

[0094] In this embodiment, the battery cell can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this embodiment is not limited to this. The battery cell can be flat, cuboid, etc.

[0095] The battery device can be a battery pack, which includes a housing and one or more individual battery cells housed within the housing. The individual battery cells can be battery modules, which can be housed within the housing by securing the battery modules to the housing; alternatively, multiple individual battery cells can be housed within the housing by directly securing them to the housing.

[0096] In embodiments of this disclosure, the housing may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing for housing individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or unsealed. The first housing may be a top cover or a bottom plate. For example, the housing may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, forming a closed space inside the housing for housing individual battery cells.

[0097] In embodiments of this disclosure, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0098] The technical solutions described in the embodiments of this disclosure are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0099] Currently, judging from market trends, the application of batteries is becoming increasingly widespread. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of the application areas of power batteries, the market demand for them is also constantly increasing.

[0100] In today's technological advancements, optimizing battery device performance is paramount, placing higher demands on the arrangement of individual battery cells. On one hand, it's crucial to maximize the utilization of space within the enclosure, storing more energy within a limited area. On the other hand, the compactness of multiple battery cells is indispensable; a close arrangement reduces volume and adapts to a wider range of applications.

[0101] Based on this, this disclosure proposes a battery device in which multiple battery cells of the battery cell assembly are arranged laterally (i.e., along the width of the housing). This effectively reduces the area occupied within the housing, fully utilizes the space in the width direction of the housing, and reduces the longitudinal (i.e., the length direction) occupancy, resulting in a more compact layout of the battery cell assembly. This improves the space utilization within the housing, freeing up more installation space for other components, and also makes the installation of the battery device more flexible within a limited space.

[0102] The vehicle disclosed in this disclosure can be a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. The vehicle has an internal battery pack, which may be located at the bottom of the vehicle. The battery pack can be used to power the vehicle, for example, as a drive power source, replacing or partially replacing fuel or natural gas to provide driving power. The battery pack can not only serve as a drive power source but also as an operating power source. The vehicle may also include a controller and a motor. The controller is used to control the power supply from the battery pack to the motor, for example, to meet the power needs of starting, navigation, and driving the vehicle.

[0103] Please refer to Figure 1, which is a schematic diagram of a battery device 100 according to some embodiments of the present disclosure; please refer to Figure 2, which is an exploded view of the battery device 100 according to some embodiments of the present disclosure from one angle; please refer to Figure 3, which is an exploded view of the battery device 100 according to some embodiments of the present disclosure from another angle; please refer to Figure 4, which is a structural schematic diagram of the base plate 11 and the battery cell assembly 20 of the battery device 100 according to some embodiments of the present disclosure.

[0104] In some embodiments of this disclosure, the battery device 100 includes a housing 10 and a battery cell assembly 20. The battery cell assembly 20 is disposed within the housing 10 and includes a plurality of battery cells 301. The plurality of battery cells 301 in the battery cell assembly 20 are stacked along a second direction Y and satisfy the following conditions: S is the sum of the number of battery cells 301 in the multiple battery cell modules 20, W b t is the inner width of the casing 10, t is the width of each battery cell 301, A is the length of each battery cell 301, and W is the inner width of the casing 10. cWhen the second direction Y is the width direction of the housing 10, it refers to the set gap that the battery cell assembly 20 and the side wall of the housing 10 must satisfy in the width direction of the housing 10; W d This refers to the set gap that must be satisfied between the battery cell assembly 20 and the side wall of the housing 10 in the width direction when the second direction Y is the length direction of the housing 10. Here, the length of the housing 10 is greater than the width of the housing 10. The square brackets in the formula represent the rounding function.

[0105] For example, the receiving cavity inside the housing 10 is a cuboid cavity, and the battery cell 301 is a cuboid battery. In the battery device 100 described above, the product of A*t represents the area occupied by a single battery cell 301. Therefore, the product of S*A*t can represent the area occupied by all battery cells 301, combined with the bottom area of ​​the receiving cavity of the housing 10, and the predetermined gap that needs to be reserved when the battery cell assembly 20 is arranged inside the housing 10. b -W c This indicates the dimensions that can be arranged when multiple battery cells 301 are arranged laterally (i.e., along the width direction of the housing 10), or it can also be expressed as the number of multiple battery cell assemblies 20 arranged in the width direction of the housing 10, W. b -W d This indicates the dimensions that multiple battery cells 301 can be arranged longitudinally (i.e., along the length of the housing 10), or it can also be expressed as the number of battery cells 301 arranged in the width direction of the housing 10, where W c The specified clearance can be for the heat dissipation requirements of the battery cell assembly 20, the expansion space reserved when the battery cell assembly 20 expands, and the installation space for various components inside the housing 10. d The indicated clearance can be a safety clearance when the battery cell assembly 20 is installed inside the housing 10, for example, W d <W c .

[0106] The battery cell assembly 20 that meets the above conditions, based on the dimensions of the battery cells 301 and the dimensions of the internal cavity of the housing 10, allows the multiple battery cells 301 of the battery cell assembly 20 to be arranged laterally (i.e., along the width direction of the housing 10). This effectively reduces the area occupied within the housing 10, fully utilizes the space in the width direction of the housing 10, and reduces the longitudinal (i.e., the length direction of the housing 10) occupancy, making the layout of the battery cell assembly 20 more compact. This improves the space utilization rate within the housing 10, freeing up more installation space for other components, and also makes the installation of the battery device 100 more flexible within a limited space.

[0107] For example, referring to FIG4, at least one battery cell assembly 20 may be provided. When there are multiple battery cell assemblies 20, the multiple battery cell assemblies 20 are arranged in a first direction X. The battery cell assembly 20 includes multiple battery cells 301. The multiple battery cells 301 in the battery cell assembly 20 are stacked along a second direction Y. The first direction X may be the length direction of the housing 10, and the second direction Y may be the width direction of the housing 10.

[0108] When multiple battery cells 20 are arranged along the length of the housing 10, it facilitates flexible combinations to meet different capacity requirements. The appropriate number of battery cells 20 can be selected based on the power requirements of the actual application scenario, improving the applicability of the battery device 100. Secondly, the stacked arrangement of multiple battery cells 301 within the battery cell assembly 20 along the width of the housing 10 effectively utilizes the lateral space of the housing 10, improving space utilization and reducing the occupancy in the length and height of the housing 10, thus providing more possibilities for the layout of other components within the equipment.

[0109] In some embodiments of this disclosure, a predetermined gap W must be satisfied between the battery cell assembly 20 and the side wall of the housing 10 in the width direction of the housing 10. c Satisfying: 10mm≤W c ≤130mm;

[0110] For example, W c Available sizes are: 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, and 120mm.

[0111] In the above example, when the battery cell assembly 20 is arranged laterally, a reasonable setting gap W is set. c The appropriate clearance provides sufficient space for heat dissipation in the battery cell 301, preventing overheating. Simultaneously, it buffers external impacts to a certain extent, protecting the battery cell 301. This suitable clearance ensures the safe and stable operation of the battery device 100 and extends the battery's lifespan. Furthermore, this set clearance W... c It also provides assembly space for other structural components, facilitating the overall layout and installation of the battery device 100.

[0112] In some embodiments of this disclosure, a predetermined gap W must be satisfied between the battery cell assembly 20 and the side wall of the housing 10 in the width direction of the housing 10. d Satisfying: 10mm≤W d ≤130mm.

[0113] For example, W dAvailable sizes are: 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, and 120mm.

[0114] In the above example, when the battery cell assembly 20 is arranged longitudinally, a reasonable setting gap W is set. d This provides heat dissipation space for the battery cell 301, preventing overheating. Simultaneously, it can buffer external impacts to a certain extent, protecting the battery cell 301. The appropriate clearance ensures the safe and stable operation of the battery device 100 and extends the battery's lifespan.

[0115] In some embodiments of this disclosure, W c Greater than W d In other words, the larger W c The gap provides a better heat dissipation channel for the battery cell assembly 20 in the width direction, reducing the risk of battery performance degradation due to heat accumulation. Secondly, during installation and maintenance, W... c The larger clearance allows operators to easily access the battery cell assembly 20 across the width of the housing 10, improving work efficiency. It also provides ample space for potential wiring and other structural elements.

[0116] In some embodiments of this disclosure, the housing 10 includes a top plate 13 and a bottom plate 11 spaced apart along the height direction of the housing 10. A terminal post is provided on the side of the battery cell 301 facing the top plate 13. In the height direction of the housing 10, the height Hi of the battery cell 301 satisfies: 110mm≤Hi≤140mm, wherein the height Hi of the battery cell 301 is the distance between the surface of the terminal post facing the top plate 13 and the surface of the bottom plate 11 facing the top plate 13.

[0117] For example, the height Hi of the battery cell 301 can be 112mm, 115mm, 118mm, 120mm, 122mm, 125mm, 128mm, 130mm, 132mm, or 135mm.

[0118] In the example above, the shorter battery cell 301 occupies less space in the height direction of the housing 10, which is beneficial for designing a shorter housing 10. The shorter housing 10 can lower the overall center of gravity of the device, improving stability. It is also more advantageous in applications where space is limited, such as when there is limited space at the bottom of an electric vehicle. This design improves space utilization, provides more possibilities for the installation of other components, and also helps optimize the vehicle's aerodynamic performance.

[0119] In some embodiments of this disclosure, referring to Figures 3 and 5, Figure 5 is a schematic diagram of the cooperation between the heat exchange assembly 50 and the battery cell assembly 20 in some embodiments of this disclosure. The battery device 100 also includes the heat exchange assembly 50, which is used for heat exchange with the battery cell 301. The heat exchange assembly 50 includes a first heat exchange section and a second heat exchange section. The first heat exchange section is bent and extends to define a U-shaped region. The second heat exchange section is bent and arranged in the U-shaped region and is bent and connected to one end of the first heat exchange section.

[0120] In the example above, the U-shaped area formed by the bending extension of the first heat exchange section better conforms to the outer contour of the battery cell assembly 20, especially when the battery cell 301 is arranged laterally along the width direction of the housing 10, it can fully cover the battery cell 301, ensuring uniform heat exchange. The second heat exchange section is bent and arranged within the U-shaped area and connected to the first heat exchange section, further increasing the heat exchange area and improving heat exchange efficiency. This design can effectively remove the heat generated by the battery cell 301 during operation, preventing the battery temperature from becoming too high, thereby extending the battery's lifespan and ensuring stable battery performance. At the same time, efficient heat exchange helps improve the safety of the entire battery device 100 and reduces the risk of thermal runaway.

[0121] In related technologies, to ensure that the battery device 100 operates within a suitable temperature range, a heat exchange assembly 50 is typically used to exchange heat with the individual battery cells 301 of the battery device 100 to regulate the temperature of the individual battery cells 301. The heat exchange assembly 50 in related technologies often employs heat exchange tubes; however, due to the structural limitations of heat exchange tubes, the temperature regulation efficiency of the heat exchange assembly 50 for the individual battery cells 20 is relatively low. Therefore, improving the temperature regulation efficiency of the heat exchange assembly 50 using heat exchange tubes for the individual battery cells 20 is a technical problem that needs to be solved.

[0122] Based on this, referring to Figures 1-5, Figure 5 is a schematic diagram of the cooperation between the heat exchange assembly 50 and the battery cell assembly 20 in some embodiments of this disclosure. This disclosure provides a battery device 100, which includes: a housing 10, a battery cell assembly 20 and a heat exchange assembly 50. The battery cell assembly 20 is disposed in the housing 10 and includes a plurality of battery cells 301. The heat exchange assembly 50 is used to exchange heat with the battery cells 301 and includes at least one heat exchange unit 5. The heat exchange unit 5 has a heat exchange channel 5a. The heat exchange channel 5a has a heat exchange channel 51a for conducting heat exchange medium. The heat exchange channel 5a includes a straight pipe section 51 extending in a straight line and a bent pipe section 52 extending in an arc. In the extension direction of the heat exchange unit 5, the bent pipe section 52 connects two adjacent straight pipe sections 51. The ratio of the bending radius R of the bent pipe section 52 to the width W of the heat exchange channel 5a is k, where k is greater than 0.5.

[0123] The heat exchange channel section 5a can be a tubular structure.

[0124] The heat exchange component 50 is used for heat exchange with the battery cell 301. This can be understood as follows: there is a thermally conductive relationship between the heat exchange component 50 and the battery cell 301, such as thermally conductive contact or connection, to achieve heat exchange between the heat exchange component 50 and the battery cell 301. The heat exchange component 50 can be used to increase or decrease the temperature of the battery cell 301, depending on the ambient temperature of the battery device 100 and its own temperature.

[0125] The heat exchange medium can be a liquid, such as water or a mixture of water and other liquids. As the heat exchange medium flows along the heat exchange channel 51a, it can carry away the heat generated by the battery cell 301 or heat the battery cell 301.

[0126] Optionally, the bend 52 can be semi-circular.

[0127] The bending radius R of the bend section 52 refers to the radius of curvature of the arc containing the centerline s of the bend section 52.

[0128] The width direction, extension direction, and thickness direction of the heat exchange channel 5a are perpendicular to each other, and the battery cell 301 can be thermally connected or thermally contacted with at least one side of the heat exchange channel 5a in the thickness direction.

[0129] In the above technical solution, the heat exchange assembly 50 for regulating the temperature of the battery cell 301 is configured to include at least one heat exchange unit 5. By configuring the heat exchange channel 5a of the heat exchange unit 5 to include a straight pipe section 51 and a bent pipe section 52 connected between the straight pipe sections 51, the heat exchange channel 5a can be bent and extended, increasing the heat exchange area between the heat exchange unit 5 and the battery cell assembly 20, and improving the temperature regulation efficiency of the heat exchange assembly 50 for the battery cell assembly 20. Furthermore, by making the ratio of the bending radius of the bent pipe section 52 to the width of the heat exchange channel 5a greater than 0.5, it is convenient to bend and shape the heat exchange channel 5a during the processing of the bent heat exchange unit 5.

[0130] In some embodiments, the value of k ranges from 1.0 to 1.5.

[0131] In the above technical solution, the ratio k of the bending radius of the bent pipe section 52 to the width of the heat exchange channel section 5a is not less than 1.0. This can reduce the process difficulty of the heat exchange unit 5 during the bending process. Furthermore, by setting the ratio k of the bending radius of the bent pipe section 52 to the width of the heat exchange channel section 5a to be not greater than 1.5, the heat exchange area of ​​the heat exchange unit 5 can be made larger. By setting the ratio k of the bending radius of the bent pipe section 52 to the width of the heat exchange channel section 5a to be between 1.0 and 1.5, the bending process difficulty and heat exchange area of ​​the heat exchange unit 5 can be better balanced, thereby reducing the processing difficulty of the heat exchange component 50 and increasing the heat exchange area.

[0132] In some embodiments, referring to Figures 5 and 6, Figure 6 is a front view of a heat exchange assembly according to some embodiments of the present disclosure. A plurality of straight pipe segments 51 in a single heat exchange channel section 5a include a plurality of first straight pipe segments 511 arranged sequentially at intervals along a first direction X. Each first straight pipe segment 511 extends along a second direction Y. A plurality of bent pipe segments 52 in a single heat exchange channel section 5a include a first bent pipe segment 521. The first bent pipe segment 521 connects the same end of two adjacent first straight pipe segments 511 along the second direction Y. The orthographic projections of the first straight pipe segment 511 and the first bent pipe segment 521 along a third direction Z are both located within the orthographic projection of the battery cell assembly 20 along the third direction Z. The third direction Z, the second direction Y, and the first direction X intersect each other.

[0133] In this diagram, the first direction X can be referenced to the X direction in the attached drawing, the second direction Y can be referenced to the Y direction in the attached drawing, and the third direction Z can be referenced to the Z direction in the attached drawing. The thickness direction of the heat exchange channel section 5a can be consistent with the third direction Z.

[0134] In the above technical solution, by arranging multiple first straight pipe segments 511 of a single heat exchange unit 5 along the first direction X and connecting two adjacent first straight pipe segments 511 through a first bent pipe segment 521, the pipe arrangement density of the heat exchange unit 5 can be increased, thereby further increasing the heat exchange area of ​​the heat exchange unit 5 and further improving the temperature regulation efficiency of the heat exchange component 50 for the battery cell component 20.

[0135] In some embodiments, referring to Figures 5 and 6, the extension length L of the first straight pipe segment 511 is greater than or equal to 50 mm.

[0136] For example, the extension length L of the first straight pipe section 511 is 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 90mm, etc.

[0137] In the above technical solution, during the process of bending the heat exchange flow channel 5a of the heat exchange unit 5 to form the first straight pipe section 511 and the first bent pipe section 521 connecting two adjacent first straight pipe sections 511 using a bending die, it is necessary to clamp and fix the first straight pipe section 511 to bend and form the first bent pipe section 521. By ensuring that the extension length of the first straight pipe section 511 arranged along the first direction X is not less than 50mm, the first straight pipe section 511 can have a longer length for clamping and fixing, thereby improving the reliability of clamping and fixing the first straight pipe section 511 and thus improving the bending forming quality of the heat exchange unit 5.

[0138] In some embodiments, referring to Figures 5 and 6, the distance d1 between two adjacent first straight pipe sections 511 in the same heat exchange channel section 5a in the first direction X is greater than the width W of the first straight pipe section 511.

[0139] In the above technical solution, by making the distance d1 between two adjacent first straight pipe sections 511 in the same heat exchange channel section 5a in the first direction X greater than the width W of the first straight pipe section 511, the bending process difficulty of the first bent pipe section 521 of the heat exchange unit 5 can be reduced.

[0140] In some embodiments, the ratio of the distance d1 between two adjacent first straight pipe sections 511 in the first direction X to the width W of the first straight pipe section 511 is less than 2.

[0141] For example, the ratio of the distance d1 between two adjacent first straight pipe sections 511 in the first direction X to the width W of the first straight pipe section 511 in the same heat exchange flow channel section 5a is 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, etc.

[0142] In the above technical solution, by making the distance d1 between two adjacent first straight pipe segments 511 in the first direction X in the same heat exchange channel section 5a greater than the width W of the first straight pipe segment 511, and at the same time making the ratio of the distance d1 between two adjacent first straight pipe segments 511 in the first direction X to the width W of the first straight pipe segment 511 less than 2, that is, the ratio of the distance d1 between two adjacent first straight pipe segments 511 in the first direction X to the width W of the first straight pipe segment 511 in the same heat exchange channel section 5a is greater than 1 and less than 2, while reducing the bending process difficulty of the first bent pipe segment 521 of the heat exchange unit 5, the arrangement density of multiple first straight pipe segments 511 along the first direction X can be larger, thereby better balancing the bending process difficulty and heat exchange area of ​​the heat exchange unit 5.

[0143] In some embodiments, the ratio of the extension length of the first straight pipe section 511 to the extension length of the first bent pipe section 521 is 0.7 to 2.

[0144] For example, the ratio of the extension length of the first straight pipe section 511 to the extension length of the first bent pipe section 521 is 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, etc.

[0145] In the above technical solution, by ensuring that the ratio of the extension length of the first straight pipe section 511 to the extension length of the first bent pipe section 521 is not less than 0.7, the extension length of the first bent pipe section 521 can be larger, thereby giving the first bent pipe section 521 a larger bending radius, which can reduce the bending process difficulty of the first bent pipe section 521. At the same time, by ensuring that the ratio of the extension length of the first straight pipe section 511 to the extension length of the first bent pipe section 521 is not greater than 2, the extension length of the first bent pipe section 521 can be appropriate so that the spacing between adjacent first straight pipe sections 511 along the first direction X is not too large. By ensuring that the ratio of the extension length of the first straight pipe section 511 to the extension length of the first bent pipe section 521 is 0.7 to 2, the bending process difficulty and heat exchange area of ​​the heat exchange unit 5 can be well balanced.

[0146] In some embodiments, referring to Figures 5 and 6, all the first straight pipe segments 511 and all the first bent pipe segments 521 in a single heat exchange channel section 5a constitute a bending body 53. There are multiple heat exchange units 5, and the bending bodies 53 of the multiple heat exchange units 5 are arranged sequentially along the first direction X.

[0147] Each heat exchange unit 5 has a heat exchange flow channel section 5a. All the first straight pipe segments 511 and all the first bent pipe segments 521 in the single heat exchange flow channel section 5a constitute a bending body 53. This can be understood as: all the first straight pipe segments 511 and all the first bent pipe segments 521 in the single heat exchange unit 5 constitute a bending body 53. Thus, each heat exchange unit 5 has one bending body 53, and multiple heat exchange units 5 have multiple bending bodies 53.

[0148] In the above technical solution, setting multiple heat exchange units 5 can increase the heat exchange area of ​​the heat exchange component 50, and the bending bodies 53 of multiple heat exchange units 5 are arranged sequentially along the first direction X, which can increase the arrangement density of multiple heat exchange units 5, thereby making the arrangement density of the pipeline of the entire heat exchange component 50 larger, better increasing the heat exchange area of ​​the heat exchange component 50, and thus better improving the heat exchange efficiency of the heat exchange component 50 for the battery cell component 20.

[0149] In some embodiments, referring to Figures 5 and 6, the distance between two adjacent first straight pipe segments 511 in the same bending body 53 in the first direction X is d1, and the distance between two adjacent first straight pipe segments 511 in the first direction X in two adjacent bending bodies 53 is d2, where d2 is less than d1.

[0150] In the above technical solution, taking advantage of the fact that the distance d2 between two adjacent first straight pipe segments 511 in the first direction X of two adjacent bending bodies 53 is basically unaffected by the bending process, by setting the distance between two adjacent first straight pipe segments 511 in the first direction X of two adjacent bending bodies 53 to be relatively small, it is beneficial to increase the pipe layout density of the heat exchange component 50 without increasing the difficulty of the bending process, thereby increasing the heat exchange area of ​​the heat exchange component 50.

[0151] In some embodiments, referring to Figures 5 and 6, all first straight pipe segments 511 and all first bent pipe segments 521 in a single heat exchange channel section 5a constitute a bending body 53. The plurality of straight pipe segments 51 in the single heat exchange channel section 5a include second straight pipe segments 512. The second straight pipe segments 512 in the same heat exchange channel section 5a are located on at least one side of the bending body 53 along the second direction Y. The second straight pipe segments 512 extend along the first direction X and are connected to the first straight pipe segments 511 in the same heat exchange channel section 5a.

[0152] In the above technical solution, by setting the second straight pipe section 512 in the same heat exchange channel section 5a on at least one side of the bending body 53 along the second direction Y, the pipe arrangement density of a single heat exchange channel section 5a can be increased, and the heat exchange area of ​​the heat exchange unit 5 can be increased.

[0153] In some embodiments, referring to Figures 5 and 6, the minimum distance d3 between the first bend section 521 and the second straight section 512 in the same heat exchange channel section 5a in the second direction Y is greater than or equal to 20 mm.

[0154] For example, the minimum distance d3 between the first bend section 521 and the second straight section 512 in the second direction Y in the same heat exchange channel section 5a is 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, etc.

[0155] In the above technical solution, by setting the minimum distance d3 between the first bent pipe section 521 and the second straight pipe section 512 in the same heat exchange channel section 5a to be no less than 20mm, a large distance can be made between the second straight pipe section 512 and the first bent pipe section 521. During the bending process of the heat exchange channel section 5a using the bending die, the risk of interference between the bending die and the second straight pipe section 512 during the bending process of the first bent pipe section 521 can be reduced. While making the heat exchange channel section 5a have a high arrangement density, the bending process difficulty of the heat exchange channel section 5a can be reduced.

[0156] In some embodiments, referring to Figures 5 and 6, a plurality of bends 52 in a single heat exchange channel section 5a include a second bend 522, which connects a first straight pipe section 511 and a second straight pipe section 512 in the same heat exchange channel section 5a.

[0157] In the above technical solution, by connecting the first straight pipe section 511 and the second straight pipe section 512 in the same heat exchange channel section 5a through the second bend pipe section 522, the pipe arrangement density of the heat exchange channel section 5a can be increased, and the heat exchange area of ​​the heat exchange channel section 5a can be increased.

[0158] In some embodiments, referring to Figures 5 and 6, all the first straight pipe segments 511 and all the first bent pipe segments 521 in a single heat exchange channel section 5a constitute a bending body 53. There are two heat exchange units 5, and the bending bodies 53 of the two heat exchange units 5 are arranged along the first direction X. The two heat exchange units 5 are a first heat exchange unit 501 and a second heat exchange unit 502, respectively. The first heat exchange unit 501 includes a second straight pipe segment 512, which is located on one side of the bending body 53 of the first heat exchange unit 501 along the second direction Y. The second heat exchange unit 502 includes two second straight pipe segments 512, which are located on one side of the bending body 53 of the second heat exchange unit 502 along the second direction Y. On both sides of Y, the bending body 53 has a first side and a second side in the second direction Y. The second straight pipe section 512 of the first heat exchange unit 501 and one of the second straight pipe sections 512 of the second heat exchange unit 502 are both located on the first side of the bending body 53 in the second direction Y. The second straight pipe section 512 of the first heat exchange unit 501 and one of the second straight pipe sections 512 of the second heat exchange unit 502 located on the first side of the bending body 53 in the second direction Y are arranged along the first direction X. The other second straight pipe section 512 of the second heat exchange unit 502 is located on the second side of the bending body 53 in the second direction Y, and the other second straight pipe section 512 of the second heat exchange unit 502 extends to the side of the bending body 53 of the first heat exchange unit 501 along the second direction Y.

[0159] In the above technical solution, setting two heat exchange units 5 can increase the heat exchange area of ​​the heat exchange assembly 50. Furthermore, arranging the bent bodies 53 of the two heat exchange units 5 sequentially along the first direction X can increase the arrangement density of the two heat exchange units 5, thereby increasing the pipe arrangement density of the entire heat exchange assembly 50 and further improving the heat exchange area of ​​the heat exchange assembly 50. This, in turn, can better improve the heat exchange efficiency of the heat exchange assembly 50 for the battery cell assembly 20. Moreover, by rationally arranging the second straight pipe section 512 of the first heat exchange unit 501 and the second straight pipe section 512 of the second heat exchange unit 502 on opposite sides of the bent body 53 along the second direction Y, the pipe arrangement density of the heat exchange assembly 50 can be further increased, thereby increasing the heat exchange area of ​​the heat exchange assembly 50.

[0160] In some embodiments, referring to Figures 5 and 6, the minimum distance d3 between the first bent pipe section 521 and the second straight pipe section 512 in the same heat exchange channel section 5a in the second direction Y, and the minimum distance d4 between the second straight pipe section 512 located on the second side of the bent body 53 in the second direction Y in the second heat exchange unit 502 and the first bent pipe section 521 in the first heat exchange unit 501 in the second direction Y, is less than d3.

[0161] In the above technical solution, by taking advantage of the fact that the distance between the first bent pipe section 521 and the second straight pipe section 512 of different heat exchange units 5 is not limited by the bending process, the distance between the first bent pipe section 521 and the second straight pipe section 512 of different heat exchange units 5 can be set to be smaller, which can increase the pipe layout density of the heat exchange component 50, thereby increasing the heat exchange area of ​​the heat exchange component 50.

[0162] In some embodiments, referring to Figures 5 and 6, the plurality of straight pipe segments 51 in the second heat exchange unit 502 further include a third straight pipe segment 513 and a fourth straight pipe segment 514. Along the first direction X, the third straight pipe segment 513 is located on the side of the bent body 53 in the second heat exchange unit 502 away from the bent body 53 in the first heat exchange unit 501. The third straight pipe segment 513 extends along the second direction Y. Along the second direction Y, the fourth straight pipe segment 514 is disposed on the side of the second straight pipe segment 512 located on the second side away from the bent body 53. The fourth straight pipe segment 514 extends along the first direction X. The third straight pipe segment 513 connects the second straight pipe segment 512 and the fourth straight pipe segment 514 in the second heat exchange unit 502.

[0163] In the above technical solution, by making the second heat exchange unit 502 include a third straight pipe section 513 and a fourth straight pipe section 514, and by making the bent body 53 of the two heat exchange units 5 located within the space surrounded by the first straight pipe section 511, the second straight pipe section 512, the third straight pipe section 513 and the fourth straight pipe section 514 of the two heat exchange units 5, forming an outer-inner structure, the arrangement of the two heat exchange units 5 can be compact, thereby increasing the heat exchange area of ​​the heat exchange assembly 50.

[0164] In some embodiments, referring to Figures 5 and 6, the plurality of bends 52 in the second heat exchange unit 502 further include a third bend 523 and a fourth bend 524. The third bend 523 is connected between the second straight pipe section 512 and the third straight pipe section 513 of the second heat exchange unit 502, and the fourth bend 524 is connected between the third straight pipe section 513 and the fourth straight pipe section 514.

[0165] In the above technical solution, by connecting the second straight pipe section 512 and the third straight pipe section 513 of the second heat exchange unit 502, as well as the third straight pipe section 513 and the fourth straight pipe section 514, through the bend pipe section 52, the pipe arrangement density of the heat exchange component 50 can be increased, and the heat exchange area of ​​the heat exchange flow channel section 5a can be increased.

[0166] In some embodiments, referring to Figures 5 and 6, the distance between two adjacent first straight pipe sections 511 in the same heat exchange channel section 5a in the first direction X is d1, and the distance between the third straight pipe section 513 and the nearest first straight pipe section 511 in the first heat exchange unit 501 is d5, and the ratio of d5 to d1 is 0.7 to 1.5.

[0167] For example, the ratio of d5 to d1 is 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, etc.

[0168] In the above technical solution, the third straight pipe section 513 of the second heat exchange unit 502 and the multiple first straight pipe sections 511 of the two heat exchange units 5 are arranged in the first direction X. By setting the ratio of the distance d5 between the third straight pipe section 513 and the nearest first straight pipe section 511 in the first heat exchange unit 501 to the distance d1 between two adjacent first straight pipe sections 511 in the same heat exchange flow channel 5a in the first direction X to be in the range of 0.7 to 1.5, the distance between the straight pipe sections 51 arranged along the first direction X can be made more uniform, thereby making the temperature regulation of the battery cell 301 by the heat exchange assembly 50 more uniform.

[0169] In some embodiments, referring to Figures 5 and 6, the distance between the fourth straight pipe segment 514 and the second straight pipe segment 512 located on the second side in the second direction Y is d6, the thickness direction of the battery cell 301 is consistent with the second direction Y, the thickness of the battery cell 301 is t, and d6 is less than t.

[0170] For example, the shape of the battery cell 301 can be a cuboid, and the thickness direction of the battery cell 301 refers to the direction of the smallest dimension among the length, width and height of the battery cell 301.

[0171] In the above technical solution, by making the distance d6 between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 in the second direction Y smaller than the thickness t of the battery cell 301 in the second direction Y, the distance between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 in the second direction Y is smaller. This avoids the situation where a single battery cell 301 is completely facing the gap between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 and cannot achieve effective heat exchange. In this way, the battery cell 301 facing the gap between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 can make thermal contact with the heat exchange flow channel 5a, so as to achieve effective temperature regulation.

[0172] In some embodiments, the ratio of d6 to t is 0.3 to 0.8.

[0173] For example, the ratio of d6 to t is 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, etc.

[0174] In the above technical solution, by setting the ratio of the distance d6 between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 in the second direction Y to the thickness t of the battery cell 301 in the second direction Y to be in the range of 0.3 to 0.8, the battery cell 301 facing the gap between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 can make thermal contact with the heat exchange channel section 5a to achieve effective temperature regulation, while facilitating the arrangement of the two heat exchange units 5 and reducing the difficulty of arrangement.

[0175] In some embodiments, referring to Figures 4 and 5, the battery cell assembly 20 includes one or more rows of battery cells 30 arranged along a first direction X, and each row of battery cells 30 includes a plurality of battery cells 301 arranged along a second direction Y.

[0176] In the above technical solution, by configuring the battery cell assembly 20 to include one or more battery cell rows 30 arranged along the first direction X, and each battery cell row 30 including multiple battery cells 301 arranged along the second direction Y, the multiple battery cell rows 30 in the battery cell assembly 20 can be ordered and compact, thereby increasing the capacity of the battery device 100. Furthermore, by making the arrangement direction of the multiple battery cells 301 in each battery cell row 30 intersect with the extension direction of the first straight pipe segment 511, the first straight pipe segment 511 can achieve thermally conductive contact with the multiple battery cells 301 in a single battery cell row 30 as much as possible, so that the single first straight pipe segment 511 can exchange heat with the multiple battery cells 301 in the battery cell row 30, thereby improving the heat exchange efficiency and making the heat exchange of the multiple battery cells 301 in the battery cell row 30 more uniform.

[0177] In some embodiments, the orthographic projection of the first straight pipe segment 511 along the third direction Z is located within the orthographic projection of the battery cell row 30 along the third direction Z.

[0178] In the above technical solution, by ensuring that the orthogonal projection of the first straight pipe section 511 along the third direction Z is within the orthogonal projection of the battery cell row 30 along the third direction Z, the first straight pipe section 511 can be in full contact with the battery cell row 30, and the heat exchange of the first straight pipe section 511 can be fully utilized to regulate the temperature of the battery cell 301, thereby improving the heat exchange efficiency of the first straight pipe section 511.

[0179] In some embodiments, referring to FIG5, each battery cell row 30 corresponds to at least one first straight pipe segment 511, and the orthographic projection of the first straight pipe segment 511 corresponding to each battery cell row 30 along the third direction Z is located within the orthographic projection of the corresponding battery cell row 30 along the third direction Z.

[0180] For example, each battery cell row 30 corresponds to a first straight pipe segment 511, and the projection of the first straight pipe segment 511 along the third direction Z is located within the projection of the battery cell row 30 along the third direction Z.

[0181] For example, each battery cell row 30 corresponds to two first straight pipe segments 511, and the projections of the two first straight pipe segments 511 along the third direction Z are both located within the projection of the battery cell row 30 along the third direction Z.

[0182] In the above technical solution, by ensuring that the orthographic projection of at least one first straight pipe segment 511 corresponding to a single battery cell row 30 along the third direction Z is located within the orthographic projection of the corresponding battery cell row 30 along the third direction Z, each first straight pipe segment 511 can be in full contact with the corresponding battery cell row 30, and the heat exchange of the first straight pipe segment 511 can be fully utilized to regulate the temperature of the battery cell 301 and improve the heat exchange efficiency of the first straight pipe segment 511.

[0183] In some embodiments, referring to FIG5, each of the battery cell rows 30 in at least a portion of the battery cell rows 30 corresponds to a plurality of first straight pipe segments 511.

[0184] At least some of the battery cell rows 30 correspond to multiple first straight pipe sections 511, including the following cases: for example, one battery cell row 30 corresponds to multiple first straight pipe sections 511; for another example, each of the several battery cell rows 30 corresponds to multiple first straight pipe sections 511; and for yet another example, each battery cell row 30 corresponds to multiple first straight pipe sections 511.

[0185] In the above technical solution, by making each of the battery cell rows 30 in at least a portion of the battery cell rows 30 correspond to a plurality of first straight pipe sections 511, the plurality of first straight pipe sections 511 can exchange heat with a single battery cell row 30, thereby improving the temperature regulation efficiency of a single battery cell row 30.

[0186] In some embodiments, referring to FIG5, at least some of the battery cell rows 30 correspond to the same number of first straight pipe segments 511.

[0187] At least some of the battery cell rows 30 have the same number of first straight pipe segments 511 corresponding to each battery cell row 30, including the following cases: for example, the number of first straight pipe segments 511 corresponding to each battery cell row 30 in two battery cell rows 30 is the same; as another example, the number of first straight pipe segments 511 corresponding to each battery cell row 30 in each battery cell row 30 is the same.

[0188] In the above technical solution, by making the number of first straight pipe segments 511 corresponding to each battery cell row 30 in at least some of the battery cell rows 30 the same, the heat exchange of at least some of the battery cell rows 30 can be more uniform, thereby making the temperature adjustment of different battery cell rows 30 more uniform.

[0189] In some embodiments, referring to Figures 5 and 6, all the first straight pipe segments 511 and all the first bent pipe segments 521 in a single heat exchange channel section 5a constitute a bending body 53. There are multiple heat exchange units 5, and the bending bodies 53 of the multiple heat exchange units 5 are arranged along the first direction X. Different bending bodies 53 are used to exchange heat with different battery cell rows 30.

[0190] Different bending bodies 53 are used to exchange heat with different battery cell rows 30, which means that the number of bending bodies 53 is the same as the number of battery cell rows 30 and they correspond one-to-one. Each bending body 53 is used to exchange heat with the corresponding battery cell row 30.

[0191] In the above technical solution, setting multiple heat exchange units 5 can increase the heat exchange area of ​​the heat exchange assembly 50. Furthermore, arranging the bent bodies 53 of the multiple heat exchange units 5 sequentially along the first direction X can increase the arrangement density of the multiple heat exchange units 5, thereby making the arrangement density of the pipeline of the entire heat exchange assembly 50 larger, which better increases the heat exchange area of ​​the heat exchange assembly 50, thus better improving the heat exchange efficiency of the heat exchange assembly 50 for the battery cell assembly 20. In addition, by allowing different bent bodies 53 to exchange heat with different battery cell rows 30, different battery cell rows 30 can all obtain effective heat exchange and the heat exchange is relatively uniform.

[0192] In some embodiments, referring to FIG5, at least one heat exchange unit 5 satisfies the following relationship: W=(N*AB) / (n*N+(n*N-1)*(2k-1)), where N is the total number of battery cell rows 30, the number of first straight pipe segments 511 corresponding to each battery cell row 30 is the same and is n, A is the size of a single battery cell row 30 in the first direction X, the two sides of the bending body 53 along the first direction X are the first side edge 531 and the second side edge 532, the two sides of the battery cell row 30 that exchange heat with the same bending body 53 along the first direction X are the first side edge 31 and the second side edge 32, the bending body 53 is located between the first side edge 31 and the second side edge 32, the first side edge 531 is adjacent to the first side edge 31 and the distance between the first side edge 531 and the first side edge 31 in the first direction X is B1, the second side edge 532 is adjacent to the second side edge 32 and the distance between the second side edge 532 and the second side edge 32 in the first direction X is B2, and B is the sum of B1 and B2.

[0193] In the above technical solution, by ensuring that at least one heat exchange unit 5 satisfies the formula: W=(N*AB) / (n*N+(n*N-1)*(2k-1)), this formula can be used as a bending selection design parameter constraint. When processing and bending to form the heat exchange unit 5, the selection can be made quickly after inputting the requirements according to this selection model, making it more convenient to select the processing bending process of heat exchange units 5 of different specifications and sizes.

[0194] In some embodiments, referring to FIG5, the width W of the heat exchange channel 5a is greater than the thickness t of the battery cell 301.

[0195] In the above technical solution, by making the width W of the heat exchange channel 5a greater than the thickness t of the battery cell 301, the width of the heat exchange channel 5a can be larger, which can increase the heat exchange area of ​​the heat exchange channel 5a, thereby improving the heat exchange efficiency of the heat exchange component 50 for the battery cell component 20.

[0196] In some embodiments, the ratio of the width W of the heat exchange channel 5a to the thickness t of the battery cell 301 is less than 2.

[0197] For example, the ratio of the width W of the heat exchange channel section 5a to the thickness t of the battery cell 301 is 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, etc.

[0198] In the above technical solution, while making the width W of the heat exchange channel 5a greater than the thickness t of the battery cell 301 to increase the heat exchange area of ​​the heat exchange channel 5a, the ratio of the width W of the heat exchange channel 5a to the thickness t of the battery cell 301 is less than 2. This can avoid the difficulty of bending process caused by the excessive width of the heat exchange channel 5a and the insufficient structural strength caused by the excessive width of the heat exchange unit 5. Thus, the bending process of the heat exchange channel 5a is less difficult and the structural strength of the heat exchange channel 5a is higher.

[0199] In some embodiments, referring to Figures 3-5, the heat exchange channel portion 5a is formed as a heat exchange flat tube, the thickness direction of the heat exchange channel portion 5a is consistent with the third direction Z, and at least one side surface of the heat exchange channel portion 5a in the thickness direction is in thermal contact or thermally connected to the battery cell assembly 20.

[0200] The cross-section of the heat exchange flat tube can be rectangular.

[0201] The heat exchange channel 5a is in thermal contact with the battery cell assembly 20, or the heat exchange channel 5a can be in direct contact with the battery cell assembly 20.

[0202] The heat exchange channel section 5a is thermally connected to the battery cell assembly 20. This thermal connection can be achieved through a thermally conductive structure, such as a thermally conductive adhesive layer.

[0203] In the above technical solution, by setting the heat exchange channel 5a as a heat exchange flat tube, and making at least one side surface of the heat exchange channel 5a in the thickness direction thermally contact or thermally connect with the battery cell assembly 20, the thermally conductive area between the heat exchange channel 5a and the battery cell assembly 20 can be increased, thereby improving the heat exchange efficiency of the heat exchange unit 5 for the battery cell assembly 20.

[0204] In some embodiments, referring to Figures 3-6, the surface of the heat exchange channel 5a that is in thermal contact or thermally connected with the battery cell assembly 20 is the heat exchange surface 54, which is a plane.

[0205] At least one side surface of the heat exchange channel section 5a in the thickness direction is formed as a heat exchange surface 54, and the heat exchange surface 54 is in thermal contact or thermally connected to the battery cell assembly 20.

[0206] In the above technical solution, by setting the heat exchange surface 54 of the heat exchange channel 5a as a plane, the heat exchange channel 5a can be better attached to the battery cell 301, increasing the heat conduction area between the heat exchange channel 5a and the battery cell assembly 20, and improving the heat exchange efficiency of the heat exchange unit 5 for the battery cell assembly 20.

[0207] In some embodiments, referring to Figures 3-5, the heat exchange assembly 50 is arranged on at least one side of the battery cell assembly 20 along the third direction Z.

[0208] For example, the heat exchange component 50 can be placed on one side of the battery cell assembly 20 along the third direction Z, or the heat exchange component 50 can be arranged on both sides of the battery cell assembly 20 along the third direction Z.

[0209] In the above technical solution, by arranging the heat exchange component 50 on at least one side of the battery cell assembly 20 along the third direction Z, the overall layout of the heat exchange component 50 and the battery cell assembly 20 can be made compact.

[0210] In some embodiments, the sum of the projected areas of all heat exchange units 5 of the heat exchange assembly 50 along the third direction Z is the first projected area, and the sum of the projected areas of all battery cells 301 of the battery device 100 along the third direction Z is the second projected area, and the ratio of the first projected area to the second projected area is greater than 1 / 3.

[0211] For example, the ratio of the first projected area to the second projected area is 2 / 5, 1 / 2, 3 / 5, 2 / 3, 4 / 5, etc.

[0212] In the above technical solution, by making the ratio of the total projected area of ​​all heat exchange units 5 along the third direction Z to the total projected area of ​​all battery cells 301 along the third direction Z greater than 1 / 3, the heat conduction area between the heat exchange unit 5 and the battery cell assembly 20 can be larger, resulting in higher heat exchange efficiency of the heat exchange assembly 50 for the battery cell assembly 20.

[0213] In some embodiments, referring to Figures 7 and 8, Figure 7 is a cross-sectional view along line GG in Figure 6. Figure 8 is an enlarged view of point H in Figure 7. One or more flow dividers 5b are provided within the heat exchange channel 51a, spaced apart along the width direction of the heat exchange channel portion 5a, and the flow dividers 5b extend along the extension direction of the heat exchange channel portion 5a.

[0214] Among them, the flow divider 5b can be integrally formed with the heat exchange channel section 5a.

[0215] In the above technical solution, by providing a flow divider 5b extending along the extension direction of the heat exchange channel 5a in the heat exchange channel 51a, the flow area of ​​the heat exchange channel 51a can be divided to achieve a smaller flow area, which is beneficial to improving the heat exchange effect between the heat exchange channel 5a and the battery cell assembly 20; and it can also improve the structural strength of the heat exchange channel 5a.

[0216] In some embodiments, referring to Figures 7 and 8, the flow divider 5b divides the heat exchange channel 51a into a plurality of sub-channels 511a arranged side by side and separated from each other, and the plurality of sub-channels 511a are arranged along the width direction of the heat exchange channel portion 5a.

[0217] In the above technical solution, by dividing the heat exchange channel 51a into multiple sub-channels 511a arranged side by side and separated from each other by the flow divider 5b provided in the heat exchange channel 51a, the heat exchange medium in the heat exchange channel 51a can flow along multiple sub-channels 511a with smaller flow areas, which can further improve the heat exchange effect between the heat exchange channel section 5a and the battery cell assembly 20; and further improve the structural strength of the heat exchange channel section 5a.

[0218] In some embodiments, referring to FIG7, the heat exchange channel portion 5a is formed as a heat exchange flat tube, and the ratio of the thickness dimension e1 of the flow divider 5b in the width direction of the heat exchange channel portion 5a to the wall thickness e2 of the heat exchange flat tube is 0.7 to 1.2.

[0219] For example, the ratio of the thickness of the flow divider 5b in the width direction of the heat exchange channel 5a to the wall thickness of the heat exchange flat tube is 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, etc.

[0220] In the above technical solution, by setting the heat exchange channel 5a as a heat exchange flat tube, the heat conduction area between the heat exchange channel 5a and the battery cell assembly 20 can be increased, thereby improving the heat exchange efficiency of the heat exchange unit 5 for the battery cell assembly 20. Furthermore, by making the ratio of the thickness of the flow divider 5b in the width direction of the heat exchange channel 5a to the wall thickness of the heat exchange flat tube 0.7 to 1.2, the flow divider 5b can have higher structural strength, and the flow divider 5b can also occupy less space in the heat exchange channel 51a.

[0221] In some embodiments, referring to Figures 3-6, there are multiple heat exchange units 5, and the multiple heat exchange units 5 are arranged in parallel.

[0222] For example, the heat exchange assembly 50 includes an inlet / outlet structure 60, which has an inlet 61 and an outlet 62. Each heat exchange unit 5 is connected to the inlet / outlet structure 60. The inlet / outlet structure 60 has an inlet chamber and an outlet chamber 63 that are spaced apart from each other. The inlet 61 communicates with the inlet chamber, and the outlet 62 communicates with the outlet chamber 63. One end of each heat exchange unit 5 is connected to the inlet chamber, and the other end of each heat exchange unit 5 is connected to the outlet chamber 63. The heat exchange medium flows into the inlet chamber from the inlet 61 of the inlet / outlet structure 60, and then flows into the heat exchange channels 51a of the multiple heat exchange units 5 and flows along the heat exchange channels 51a of the multiple heat exchange units 5. After the heat exchange medium flows through the multiple heat exchange units 5, it converges into the outlet chamber 63 of the inlet / outlet structure 60 and flows out from the outlet 62.

[0223] In the above technical solution, by setting multiple heat exchange units 5 in parallel, the temperature of the heat exchange medium flowing in the heat exchange channel section 5a of each heat exchange unit 5 can be made more consistent, and the heat exchange effect of each heat exchange unit 5 can be stronger.

[0224] In some embodiments, referring to Figures 3-6, the heat exchange assembly 50 includes an inlet / outlet structure 60, which has an inlet 61 and an outlet 62. Each heat exchange unit 5 is connected to the inlet / outlet structure 60. The heat exchange assembly 50 has a first end and a second end that are disposed opposite to each other along a first direction X. The inlet / outlet structure 60 is located at the first end.

[0225] For example, the liquid inlet / outlet structure 60 includes two manifolds 6, which can be arranged along the second direction Y. One manifold 6 has a liquid inlet chamber and a liquid inlet 61 communicating with the liquid inlet chamber, and the other manifold 6 has a liquid outlet chamber 63 and a liquid outlet 62 communicating with the liquid outlet chamber 63. The two ends of each heat exchange unit 5 are respectively connected to the two manifolds 6.

[0226] In the above technical solution, by arranging the liquid inlet / outlet structure 60 of the heat exchange component 50 at one end of the heat exchange component 50 along the first direction X, it is convenient for the liquid inlet / outlet structure 60 on the heat exchange component 50 to be connected with external related components.

[0227] In some embodiments, the ratio of the extension lengths of the heat exchange flow channel portions 5a of any two heat exchange units 5 is 0.8 to 1.2.

[0228] For example, the ratio of the extension lengths of the heat exchange flow channel sections 5a of any two heat exchange units 5 is 0.8, 0.9, 1, 1.1, 1.2, etc.

[0229] In the above technical solution, by making the extension length of the heat exchange flow channel 5a of the multiple heat exchange units 5 approximately the same, the heat exchange capacity of each heat exchange unit 5 can be made comparable, the heat exchange is relatively uniform, and the overall heat exchange capacity of the heat exchange assembly 50 can be made stronger.

[0230] In some embodiments, referring to Figures 1-4, the heat exchange assembly 50 is disposed inside the housing 10.

[0231] In the above technical solution, by placing the heat exchange component 50 inside the housing 10, the heat exchange component 50 and the battery cell assembly 20 can have better thermal contact, reducing the thermal resistance between the heat exchange component 50 and the battery cell assembly 20 and improving the heat exchange efficiency.

[0232] In some embodiments, referring to Figures 2-3, the inner wall of the housing 10 is formed with a receiving groove 112, the shape of which is adapted to the shape of the heat exchange unit 5, and the heat exchange unit 5 is arranged in the receiving groove 112.

[0233] The shape of the receiving tank 112 is adapted to the shape of the heat exchange unit 5, including: the extension trajectory of the receiving tank 112 is consistent with the extension trajectory of the heat exchange unit 5.

[0234] In the above technical solution, by providing a receiving groove 112 for arranging the heat exchange unit 5 on the inner wall of the housing 10, the installation and positioning of the heat exchange unit is facilitated.

[0235] In some embodiments, referring to Figures 2-3, the inner wall of the housing 10 is formed with a plurality of ribs 111, which cooperate to define a receiving groove 112.

[0236] In the above technical solution, by forming multiple ribs 111 on the inner wall of the box 10 and defining the receiving groove 112 by the cooperation of the multiple ribs 111, the forming process of the receiving groove 112 is more convenient, and the multiple ribs 111 can improve the structural strength of the box 10.

[0237] In some embodiments, referring to Figures 2-3, a portion of the housing 10 protrudes inward to form a plurality of ribs 111.

[0238] In the above technical solution, by making a portion of the box 10 protrude inward to form a plurality of ribs 111, the processing of the ribs 111 is facilitated, and the structural strength of the box 10 is improved by the plurality of ribs 111 without increasing the weight of the box 10.

[0239] In some embodiments, referring to Figures 2-3, the housing 10 includes a base plate 11, and the heat exchange assembly 50 is mounted on the base plate 11.

[0240] For example, the heat exchange assembly 50 is mounted on the upper side of the base plate 11.

[0241] The bottom plate 11 of the housing 10 is located below the battery cell assembly 20 to support the battery cell assembly 20.

[0242] In the above technical solution, by setting the heat exchange component 50 on the bottom plate 11 of the housing 10, the heat exchange component 50 is located at a lower position inside the housing 10, which facilitates the installation and fixing of the heat exchange component 50 and makes the center of gravity of the battery device 100 lower, making it more stable and reliable.

[0243] In some embodiments, referring to Figures 2-3, a mounting beam 12 is provided on the base plate 11. The mounting beam 12 is arranged on opposite sides of the heat exchange assembly 50 along the second direction Y and extends along the first direction X. The battery cell assembly 20 is connected to the mounting beam 12, and the second direction Y intersects with the first direction X.

[0244] In the above technical solution, by setting the mounting beam 12 on the base plate 11, it is convenient to install and fix the battery cell assembly 20 on the base plate 11.

[0245] In some embodiments, the ratio of the dimension of the housing 10 in the first direction X to the dimension of the housing 10 in the second direction Y is greater than 2, and the second direction Y intersects the first direction X.

[0246] For example, the ratio of the dimension of the housing 10 in the first direction X to the dimension of the housing 10 in the second direction Y is 2.2, 2.4, 2.6, 2.8, 3, 3.2, 3.4, 3.6, 3.8, 4, etc.

[0247] In the above technical solution, by making the size of the housing 10 of the battery device 100 in the first direction X significantly larger than the size of the housing 10 in the second direction Y, the battery device 100 can be made to be roughly rectangular in shape. When the battery device 100 is applied to a vehicle, the housing 10 in the first direction X can be placed along the longitudinal direction of the vehicle, which can make full use of the longitudinal space of the vehicle and is conducive to improving the battery capacity of the battery device 100.

[0248] In some embodiments, the ratio of the dimension of the housing 10 in the third direction Z to the dimension of the housing 10 in the second direction Y is less than 0.3, and the third direction Z intersects the second direction Y.

[0249] In the above technical solution, by making the dimensions of the housing 10 smaller in the vertical direction, the battery device 100 can be made to be flat overall. When the battery device 100 is used in a vehicle, it can reduce the space occupied by the battery device 100 in the Z-direction of the vehicle, which is beneficial to the layout of other components in the vehicle. Furthermore, when the battery device 100 is installed at the bottom of the vehicle, since the battery device 100 occupies less space in the Z-direction, the bottom height of the battery device 100 will not be too low, thus reducing the risk of the battery device 100 being scratched or damaged during vehicle operation.

[0250] Referring to FIG9, this disclosure provides an electrical device 1000, including the battery device 100 of the above embodiment.

[0251] In the above technical solution, by setting the battery device 100, the heat exchange component 50 of the battery device 100 has a high temperature regulation efficiency for the battery cell assembly 20, and the heat exchange unit 5 of the heat exchange component 50 can be easily bent into shape during the processing and bending process.

[0252] In some embodiments, the electrical device 1000 is a vehicle, and the longitudinal direction of the vehicle and the length direction of the housing 10 are both the first direction X.

[0253] When the battery device 100 is used in a vehicle, the longitudinal direction of the vehicle refers to the arrangement direction of the head and tail of the vehicle body 200. The lateral direction of the vehicle is perpendicular to the longitudinal direction of the vehicle and perpendicular to the vertical direction. The vertical direction can be referred to as the Z direction in the attached figure. The longitudinal direction of the vehicle is the first direction X, and the lateral direction of the vehicle is the second direction Y.

[0254] In the above technical solution, when the battery device 100 is used in a vehicle and the longitudinal direction of the vehicle is the first direction X, the heat exchange component 50 of the battery device 100 has a high temperature regulation efficiency for the battery cell assembly 20, which can improve the safety of the vehicle during driving; and when the length direction of the battery device 100 is placed along the longitudinal direction of the vehicle, the longitudinal space of the vehicle can be fully utilized, which is beneficial to improving the capacity of the battery device 100.

[0255] The battery device 100 according to some embodiments of the present disclosure is described below with reference to Figures 1-8, in which the third direction Z is the up-down direction.

[0256] Referring to Figures 1-8, in this embodiment, the battery device 100 includes a housing 10, a plurality of battery cell assemblies 20, and a heat exchange assembly 50. The plurality of battery cell assemblies 20 are housed within the housing 10 and arranged along a first direction X. Each battery cell assembly 20 includes two rows of battery cells 30, which are arranged along the first direction X. Each battery cell row 30 includes a plurality of battery cells 301 arranged along a second direction Y, and the thickness direction of the battery cells 301 is consistent with the second direction Y. The heat exchange assembly 50 is disposed within the housing 10 and located below the battery cell assemblies 20.

[0257] The housing 10 includes a bottom plate 11 and a top plate 13. The top plate 13 covers the upper side of the bottom plate 11 and is connected to the bottom plate 11. The top plate 13 and the bottom plate 11 are detachably connected. The bottom plate 11 and the top plate 13 together define a space for accommodating the battery cell assembly 20. The bottom plate 11 is provided with mounting beams 12, which are arranged on opposite sides of the battery cell assembly 20 along the second direction Y. The battery cell assembly 20 is connected to the mounting beams 12.

[0258] The vertical dimension of the battery cell 301 is smaller than its dimension in the first direction X. The number of battery cells in each row 30 can be 15 to 20. The ratio of the dimension of the housing 10 in the first direction X to the dimension of the housing 10 in the second direction Y is greater than 2, and the ratio of the vertical dimension of the housing 10 to the dimension of the housing 10 in the second direction Y is less than 0.3. The entire battery device 100 is generally rectangular and flat.

[0259] The heat exchange assembly 50 is mounted and fixed on the base plate 11, and is thermally connected to the battery cell assembly 20. The heat exchange assembly 50 includes a heat exchange unit 5 and an inlet / outlet liquid structure 60. There are two heat exchange units 5. The inlet / outlet liquid structure 60 includes two collectors 6 arranged along the first direction X. One collector 6 forms an inlet chamber and an inlet 61, and the other collector 6 forms an outlet chamber 63 and an outlet 62. The two ends of each heat exchange unit 5 are connected to the two collectors 6 respectively.

[0260] Each heat exchange unit 5 is formed as a heat exchange flat tube, and each heat exchange unit 5 includes a heat exchange flow channel 5a, within which a heat exchange flow channel 51a is formed. Each heat exchange unit 5 includes multiple straight pipe sections 51 and multiple bent pipe sections 52, and the two heat exchange units 5 are respectively the first heat exchange unit 501 and the second heat exchange unit 502. The first heat exchange unit 501 includes a first straight pipe section 511, a second straight pipe section 512, a first bent pipe section 521, and a second bent pipe section 522. The second heat exchange unit 502 includes a first straight pipe section 511, a second straight pipe section 512, a third straight pipe section 513, a fourth straight pipe section 514, a first bent pipe section 521, a second bent pipe section 522, a third bent pipe section 523, and a fourth bent pipe section 524. All the first straight pipe sections 511 and all the first bent pipe sections 521 of each heat exchange unit 5 constitute a bent body, and the bent bodies of the two heat exchange units 5 are arranged along a first direction X.

[0261] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0262] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device (100), wherein, include: Box (10); A battery cell assembly (20) is disposed within the housing (10). The battery cell assembly (20) includes a plurality of battery cells (301). The plurality of battery cells (301) in the battery cell assembly (20) are stacked along a second direction and satisfy the following conditions: S is the sum of the number of battery cells (301) in the plurality of battery cell assemblies (20), W b t is the inner width of the housing (10), t is the width of each battery cell (301), A is the length of each battery cell (301), and W is the inner width of the housing (10). c When the second direction is the width direction of the housing (10), the set gap that the battery cell assembly (20) and the side wall of the housing (10) need to satisfy in the width direction of the housing (10); W d When the second direction is the length direction of the housing (10), the set gap that the battery cell assembly (20) and the side wall of the housing (10) need to satisfy in the width direction of the housing (10) is.

2. The battery device (100) according to claim 1, wherein, The set gap W that must be satisfied between the battery cell assembly (20) and the side wall of the housing (10) in the width direction of the housing (10) is as follows. c Satisfying: 10mm≤W c ≤130mm; The set gap W that must be satisfied between the battery cell assembly (20) and the side wall of the housing (10) in the width direction of the housing (10) is as follows. d Satisfying: 10mm≤W d ≤130mm.

3. The battery device (100) according to claim 1 or 2, wherein, W c Greater than W d .

4. The battery device (100) according to any one of claims 1-3, wherein, The housing (10) includes a top plate (13) and a bottom plate (11) spaced apart along the height direction of the housing (10). The battery cell (301) is provided with an electrode post on the side facing the top plate (13). In the height direction of the housing (10), the height Hi of the battery cell (301) satisfies: 110mm≤Hi≤140mm, wherein the height Hi of the battery cell (301) is the distance between the surface of the electrode post facing the top plate (13) and the surface of the bottom plate (11) facing the top plate (13).

5. The battery device (100) according to any one of claims 1-4, wherein, It also includes a heat exchange assembly (50) for heat exchange with the battery cell (301). The heat exchange assembly (50) includes a first heat exchange section and a second heat exchange section. The first heat exchange section is bent and extends to define a U-shaped region. The second heat exchange section is bent and arranged in the U-shaped region and is bent and connected to one end of the first heat exchange section.

6. The battery device (100) according to any one of claims 1-5, wherein, It also includes a heat exchange assembly (50) for heat exchange with the battery cell assembly (20). The heat exchange assembly (50) is arranged on at least one side of the battery cell assembly (20) in the height direction (Z) of the housing (10). The heat exchange assembly (50) includes at least one heat exchange unit (5). The heat exchange unit (5) has a heat exchange channel (5a). The heat exchange channel (5a) has a heat exchange channel (51a) for conducting heat exchange medium. The heat exchange channel (5a) includes a straight pipe section (51) extending in a straight line and a bent pipe section (52) extending in an arc. In the extension direction of the heat exchange unit (5), the bent pipe section (52) connects two adjacent straight pipe sections (51). The ratio of the bending radius R of the bent pipe section (52) to the width W of the heat exchange channel section (5a) is k, where k is greater than 0.

5.

7. The battery device (100) according to claim 6, wherein, The value of k ranges from 1.0 to 1.

5.

8. The battery device (100) according to claim 6 or 7, wherein, The plurality of straight pipe segments (51) in a single heat exchange channel section (5a) include a plurality of first straight pipe segments (511) arranged sequentially at intervals along a first direction, each first straight pipe segment (511) extending along a second direction. The plurality of bent pipe segments (52) in a single heat exchange channel section (5a) include a first bent pipe segment (521), the first bent pipe segment (521) connecting the same end of two adjacent first straight pipe segments (511) along the second direction. The orthographic projections of the first straight pipe segment (511) and the first bent pipe segment (521) along a third direction are both located within the orthographic projection of the battery cell assembly (20) along the third direction. The third direction, the second direction, and the first direction intersect each other.

9. The battery device (100) according to claim 8, wherein, The extension length L of the first straight pipe section (511) is greater than or equal to 50 mm.

10. The battery device (100) according to claim 8 or 9, wherein, In the same heat exchange unit (5), the distance d1 between two adjacent first straight pipe sections (511) in the first direction is greater than the width W of the first straight pipe section (511).

11. The battery device (100) according to claim 10, wherein, The ratio of the distance d1 between two adjacent first straight pipe sections (511) in the first direction to the width W of the first straight pipe section (511) in the same heat exchange channel section (5a) is less than 2.

12. The battery device (100) according to any one of claims 8-11, wherein, The ratio of the extension length of the first straight pipe section (511) to the extension length of the first bent pipe section (521) is 0.7 to 2.

13. The battery device (100) according to any one of claims 8-12, wherein, The first straight pipe section (511) and the first bent pipe section (521) in a single heat exchange channel section (5a) constitute a bending body (53). There are multiple heat exchange units (5), and the bending bodies (53) of the multiple heat exchange units (5) are arranged sequentially along the first direction.

14. The battery device (100) according to claim 13, wherein, The distance between two adjacent first straight pipe sections (511) in the same heat exchange channel section (5a) in the first direction is d1, and the distance between two adjacent first straight pipe sections (511) in the first direction in two adjacent bent bodies (53) is d2, where d2 is less than d1.

15. The battery device (100) according to any one of claims 8-14, wherein, The first straight pipe section (511) and the first bent pipe section (521) in a single heat exchange channel section (5a) constitute a bending body (53). The plurality of straight pipe sections (51) in a single heat exchange channel section (5a) include a second straight pipe section (512). The second straight pipe section (512) in the same heat exchange channel section (5a) is located on at least one side of the bending body (53) along the second direction. The second straight pipe section (512) extends along the first direction and is connected to the first straight pipe section (511) in the same heat exchange channel section (5a).

16. The battery device (100) according to claim 15, wherein, The minimum distance d3 between the first bend section (521) and the second straight section (512) in the second direction of the same heat exchange channel section (5a) is greater than or equal to 20 mm.

17. The battery device (100) according to claim 15 or 16, wherein, The first straight pipe section (511) and the first bent pipe section (521) in a single heat exchange channel section (5a) constitute a bending body (53). There are two heat exchange units (5). The bending bodies (53) of the two heat exchange units (5) are arranged along the first direction. The two heat exchange units (5) are the first heat exchange unit (51) and the second heat exchange unit (52), respectively. The first heat exchange unit (51) includes a second straight pipe section (512), which is located on one side of the bent body (53) of the first heat exchange unit (51) along the second direction. The second heat exchange unit (52) includes two second straight pipe sections (512), which are located on both sides of the bent body (53) of the second heat exchange unit (52) along the second direction. The bent body (53) has a first side and a second side opposite to each other in the second direction. The second straight pipe section (512) of the first heat exchange unit (51) and one of the second straight pipe sections (512) of the second heat exchange unit (52) are both located on the first side and arranged along the first direction. The other second straight pipe section (512) of the second heat exchange unit (52) is located on the second side and extends to one side of the bent body (53) of the first heat exchange unit (51) along the second direction.

18. The battery device (100) according to claim 17, wherein, The minimum distance d3 between the first bent pipe section (521) and the second straight pipe section (512) in the same heat exchange channel section (5a) in the second direction, and the minimum distance d4 between the second straight pipe section (512) located on the second side in the second heat exchange unit (52) and the first bent pipe section (521) in the first heat exchange unit (51) in the second direction, where d4 is less than d3.

19. The battery device (100) according to any one of claims 8-18, wherein, The battery cell assembly (20) includes one or more rows (30) of battery cells arranged along the first direction, and each row (30) of battery cells includes a plurality of battery cells (301) arranged along the second direction.

20. The battery device (100) according to claim 19, wherein, At least one of the heat exchange units (5) satisfies the following relationship: W = (N*AB) / (n*N + (n*N-1)*(2k-1)), where N is the total number of the battery cell rows (30), the number of the first straight pipe sections (511) corresponding to each battery cell row (30) is the same and is n, A is the dimension of a single battery cell row (30) in the first direction, the two sides of the bent body (53) along the first direction are the first side (531) and the second side (532), and the battery cells that exchange heat with the same bent body (53) are... The two sides of the body (30) along the first direction are the first side edge (31) and the second side edge (32), respectively. The bending body (53) is located between the first side edge (31) and the second side edge (32). The first side edge (531) is adjacent to the first side edge (31) and the distance between the first side edge (31) and the first side edge (31) in the first direction is B1. The second side edge (532) is adjacent to the second side edge (32) and the distance between the second side edge (32) and the second side edge (32) in the first direction is B2. B is the sum of B1 and B2.

21. The battery device (100) according to any one of claims 6-20, wherein, The width W of the heat exchange channel (5a) is greater than the thickness t of the battery cell (301).

22. The battery device (100) according to claim 21, wherein, The ratio of the width W of the heat exchange channel (5a) to the thickness t of the battery cell (301) is less than 2.

23. The battery device (100) according to any one of claims 6-22, wherein, The heat exchange channel section (5a) is formed as a heat exchange flat tube. The thickness direction of the heat exchange channel section (5a) is consistent with the third direction. At least one side surface of the heat exchange channel section (5a) in the thickness direction is in thermal contact or thermal connection with the battery cell assembly (20).

24. The battery device (100) according to any one of claims 6-23, wherein, The surface of the heat exchange channel (5a) that is in thermal contact or thermally connected with the battery cell assembly (20) is the heat exchange surface (54), which is a plane.

25. The battery device (100) according to any one of claims 6-24, wherein, The sum of the projected areas of all the heat exchange units (5) along the third direction is the first projected area, and the sum of the projected areas of all the battery cells (301) along the third direction is the second projected area. The ratio of the first projected area to the second projected area is greater than 1 / 3.

26. The battery device (100) according to any one of claims 6-25, wherein, The inner wall of the housing (10) is formed with a receiving groove (112), the shape of which is adapted to the shape of the heat exchange unit (5), and the heat exchange unit (5) is arranged in the receiving groove (112).

27. The battery device (100) according to claim 26, wherein, The inner wall of the box (10) is formed with a plurality of ribs (111), which together define the receiving groove (112).

28. The battery device (100) according to claim 27, wherein, A portion of the box body (10) protrudes inward to form a plurality of the ribs (111).

29. The battery device (100) according to any one of claims 6-28, wherein, The housing (10) includes a base plate (11), and the heat exchange assembly (50) is mounted on the base plate (11).

30. The battery device (100) according to any one of claims 1-29, wherein, The ratio of the dimension of the box (10) in the length direction to the dimension of the box (10) in the width direction is greater than 2.

31. The battery device (100) according to any one of claims 1-30, wherein, The ratio of the dimension of the box (10) in the height direction to the dimension of the box (10) in the width direction is less than 0.

3.

32. An electrical appliance (1000), wherein, The battery device (100) includes any one of claims 1-31.

33. The electrical appliance (1000) according to claim 32, wherein, The electrical device (1000) is a vehicle, and the longitudinal direction of the vehicle and the length direction of the box (10) are both the first direction.

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