Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a box body and a battery single body assembly, the battery single body assembly is arranged in the box body, the battery single body assembly comprises a plurality of battery single bodies, the plurality of battery single bodies in the battery single body assembly are stacked in a second direction, according to the battery device disclosed by the invention, the plurality of battery monomers are transversely arranged, so that the occupied area in the box body can be well reduced, the space in the width direction of the box body can be fully utilized, the longitudinal occupied area of the box body is reduced, and the layout of the battery monomer assembly is more compact. Therefore, the space utilization rate in the box body can be improved, more mounting space is vacated for other parts, and meanwhile, the battery device is more flexible to mount in a limited space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] In the process of today's technological development, the performance optimization of the battery device is crucial. Higher requirements are put forward for the arrangement of the internal battery monomer. On the one hand, the space utilization rate in the box body needs to be improved to store more energy in a limited space. On the other hand, the compactness of multiple battery monomers is indispensable, and close arrangement can reduce the volume to adapt to more scenarios. CONTENT OF THE INVENTION

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a battery device which can better reduce the occupation in the box body and make the layout of the battery monomer assembly more compact.

[0004] The battery device according to the first aspect of the present application comprises: a box body and a battery monomer assembly, the battery monomer assembly is arranged in the box body, the battery monomer assembly comprises a plurality of battery monomers, the plurality of battery monomers in the battery monomer assembly are arranged in a second direction in a stacked manner, and satisfy: S is the sum of the number of battery monomers of the plurality of battery monomer assemblies, W b is the inner width of the box body, t is the width of each battery monomer, A is the length of each battery monomer, W c is the set gap that needs to be satisfied between the battery monomer assembly and the side wall of the box body in the width direction of the box body when the second direction is the width direction of the box body; and d is the set gap that needs to be satisfied between the battery monomer assembly and the side wall of the box body in the width direction of the box body when the second direction is the length direction of the box body.

[0005] The battery device of the present application has a plurality of battery monomers arranged transversely, which can better reduce the occupation area in the box body, can fully utilize the space in the width direction of the box body, reduce the occupation in the longitudinal direction of the box body, make the layout of the battery monomer assembly more compact, thereby improving the space utilization rate in the box body, leaving more installation space for other components, and also making the installation of the battery device in a limited space more flexible.

[0006] In some embodiments of the present application, the set gap W c between the battery monomer assembly and the side wall of the box body in the width direction of the box body satisfies: 10mm≤W c≤130mm; the set gap W between the battery monomer assembly and the side wall of the box needs to meet in the width direction of the box d , satisfies: 10mm≤W d ≤130mm.

[0007] In the above examples, by setting a reasonable range of the set gap, heat dissipation space can be provided for the battery monomer to prevent overheating. At the same time, to a certain extent, external impact can be buffered to protect the battery monomer. The appropriate gap ensures the safe and stable operation of the battery device and prolongs the service life of the battery. In addition, the set gap also provides assembly space for other structural components, facilitating the overall layout and installation of the battery device.

[0008] In some embodiments of the present application, W c is greater than W d .

[0009] In the above examples, a larger W c gap can provide better heat dissipation channels for the battery monomer assembly in the width direction, reducing the risk of battery performance degradation due to heat accumulation. Secondly, during installation and maintenance, a larger W c gap facilitates the operator to operate the battery monomer assembly from the width direction of the box, improving work efficiency. At the same time, sufficient space is reserved for possible wiring and other structures.

[0010] In some embodiments of the present application, the box includes a top plate and a bottom plate spaced apart in the height direction of the box, and the battery monomer is provided with a pole column on the side facing the top plate. In the height direction of the box, the height Hi of the battery monomer satisfies: 110mm≤Hi≤140mm, wherein the height Hi of the battery monomer is the distance between the surface of the pole column facing the top plate and the surface of the bottom plate facing the top plate.

[0011] In the above examples, shorter battery monomers occupy less space in the height direction of the box, which is conducive to the design of a low box. A low box can lower the overall center of gravity of the equipment and improve stability. At the same time, it is more advantageous in some application scenarios with limited space height, such as the limited space at the bottom of an electric vehicle. This design can improve space utilization and provide more possibilities for the installation of other components, and also helps to optimize the aerodynamic performance of the vehicle.

[0012] In some embodiments of the present application, the battery device further comprises a heat exchange assembly for heat exchange with the battery monomer. The heat exchange assembly comprises a first heat exchange part and a second heat exchange part. The first heat exchange part is bent and extended to define a U-shaped area, and the second heat exchange part is arranged in the U-shaped area and is bently connected to one end of the first heat exchange part.

[0013] In the above examples, the U-shaped region formed by the bending and extending of the first heat exchange part can better fit the external contour of the battery monomer assembly, especially when the battery monomers are arranged transversely along the width direction of the box body, it can fully cover the battery monomers and ensure uniform heat exchange. The second heat exchange part is arranged in the U-shaped region and connected with the first heat exchange part, which further increases the heat exchange area and improves the heat exchange efficiency. This design can effectively remove the heat generated by the battery monomers during operation in time, prevent the battery temperature from being too high, and thus prolong the service life of the battery and ensure the stability of the battery performance. At the same time, efficient heat exchange can help improve the safety of the entire battery device and reduce the risk of thermal runaway.

[0014] In some embodiments of the present application, the battery device further comprises a heat exchange assembly for heat exchange with the battery monomer assembly (20), the heat exchange assembly is arranged on at least one side of the battery monomer assembly (20) in the height direction of the box body, the heat exchange assembly comprises at least one heat exchange unit, the heat exchange unit has a heat exchange flow channel part, the heat exchange flow channel part has a heat exchange flow channel for guiding the heat exchange medium, the heat exchange flow channel part includes a straight pipe segment extending along a straight line and a bent pipe segment extending along an arc, in the extension direction of the heat exchange unit, the bent pipe segment connects two adjacent straight pipe segments, the ratio of the bending radius R of the bent pipe segment to the width W of the heat exchange flow channel part is k, and k is greater than 0.5.

[0015] In the above technical solution, the heat exchange assembly for adjusting the temperature of the battery monomers is arranged to include at least one heat exchange unit, by arranging the heat exchange flow channel part of the heat exchange unit to include a straight pipe segment and a bent pipe segment connected between the straight pipe segments, the heat exchange flow channel part can be bent and extended, the heat exchange area of the heat exchange unit and the battery monomer assembly can be increased, and the temperature adjustment efficiency of the heat exchange assembly on the battery monomer assembly can be improved; and by making the ratio of the bending radius of the bent pipe segment to the width of the heat exchange flow channel part greater than 0.5, the bent heat exchange unit can be conveniently formed by bending in the process of processing.

[0016] In some embodiments, the value of k ranges from 1.0 to 1.5.

[0017] In the above technical solution, the ratio k of the bending radius of the bent pipe segment to the width of the heat exchange flow channel part is not less than 1.0, which can reduce the process difficulty of the heat exchange unit in the bending process, and the ratio k of the bending radius of the bent pipe segment to the width of the heat exchange flow channel part is not greater than 1.5, which can make the heat exchange area of the heat exchange unit larger, and by setting the ratio k of the bending radius of the bent pipe segment to the width of the heat exchange flow channel part between 1.0 and 1.5, the bending process difficulty and the heat exchange area of the heat exchange unit can be better balanced, so that the processing difficulty of the heat exchange assembly is reduced and the heat exchange area is larger.

[0018] In some embodiments, the plurality of straight pipe sections in the single heat exchange flow channel portion includes a plurality of first straight pipe sections arranged in the first direction in sequence, each of the first straight pipe sections extending in the second direction, the plurality of elbow pipe sections in the single heat exchange flow channel portion includes a first elbow pipe section connected between the same end of two adjacent first straight pipe sections in the second direction, the first straight pipe sections and the first elbow pipe section are both in the projection of the battery monomer assembly in the third direction, and the third direction, the second direction and the first direction intersect with each other.

[0019] In the above technical solution, by arranging the plurality of first straight pipe sections of the single heat exchange unit in the first direction and connecting the first elbow pipe section between the two adjacent first straight pipe sections, the arrangement density of the pipe of the heat exchange unit can be improved, thereby further improving the heat exchange area of the heat exchange unit and further improving the temperature regulation efficiency of the heat exchange assembly on the battery monomer assembly.

[0020] In some embodiments, the extension length L of the first straight pipe section is greater than or equal to 50 mm.

[0021] In the above technical solution, in the process of bending the heat exchange flow channel portion of the heat exchange unit by using a bending die to form the first straight pipe section and the first elbow pipe section connected between the two adjacent first straight pipe sections, the first straight pipe section needs to be clamped and fixed to be bent to form the first elbow pipe section. By arranging the first straight pipe section in the first direction with an extension length of not less than 50 mm, the first straight pipe section has a longer length for clamping and fixing, which improves the clamping and fixing reliability of the first straight pipe section, thereby improving the bending forming quality of the heat exchange unit.

[0022] In some embodiments, the spacing d1 of the two adjacent first straight pipe sections in the same heat exchange flow channel portion in the first direction is greater than the width W of the first straight pipe section.

[0023] In the above technical solution, by arranging the spacing d1 of the two adjacent first straight pipe sections in the same heat exchange flow channel portion in the first direction to be greater than the width W of the first straight pipe section, the bending process difficulty of the first elbow pipe section of the heat exchange unit can be reduced.

[0024] In some embodiments, the ratio of the spacing d1 of the two adjacent first straight pipe sections in the same heat exchange flow channel portion in the first direction to the width W of the first straight pipe section is less than 2.

[0025] In the technical solution, the distance d1 between the two adjacent first straight pipe sections in the same heat exchange flow channel in the first direction is greater than the width W of the first straight pipe section, and the ratio of the distance d1 between the two adjacent first straight pipe sections in the same heat exchange flow channel in the first direction to the width W of the first straight pipe section is less than 2, that is, the ratio of the distance d1 between the two adjacent first straight pipe sections in the same heat exchange flow channel in the first direction to the width W of the first straight pipe section is greater than 1 and less than 2, so that the arrangement density of the plurality of first straight pipe sections in the first direction is large, and the bending process difficulty of the first bent pipe section of the heat exchange unit and the heat exchange area can be well balanced.

[0026] 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 0.7-2.

[0027] In the technical solution, 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, so that the extension length of the first bent pipe section is large, the first bent pipe section has a large bending radius, the bending process difficulty of the first bent pipe section is reduced, and 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, so that the extension length of the first bent pipe section is appropriate, the distance between the adjacent first straight pipe sections in the first direction is not too large, and the ratio of the extension length of the first straight pipe section to the extension length of the first bent pipe section is 0.7-2, so that the bending process difficulty of the heat exchange unit and the heat exchange area can be well balanced.

[0028] In some embodiments, all the first straight pipe sections and all the first bent pipe sections in a single heat exchange flow channel constitute a bending body, the heat exchange unit is multiple, and the bending bodies of the multiple heat exchange units are arranged in sequence in the first direction.

[0029] In the technical solution, the heat exchange unit is multiple, the heat exchange area of the heat exchange assembly can be improved, the bending bodies of the multiple heat exchange units are arranged in sequence in the first direction, the arrangement density of the multiple heat exchange units can be improved, the arrangement density of the pipelines of the entire heat exchange assembly is large, the heat exchange area of the heat exchange assembly is better improved, and the heat exchange efficiency of the heat exchange assembly for the battery monomer assembly can be better improved.

[0030] In some embodiments, the distance between the two adjacent first straight pipe sections in the same bending body in the first direction is d1, the distance between the two adjacent first straight pipe sections in the same bending body in the first direction is d2, and d2 is less than d1.

[0031] In the technical solution, the interval d2 of the two adjacent first straight pipe sections in the first direction of the two adjacent bending main bodies is not affected by the bending process, and the interval d2 of the two adjacent first straight pipe sections in the first direction of the two adjacent bending main bodies is set to be relatively small, so that the pipe arrangement density of the heat exchange assembly is increased without increasing the difficulty of the bending process, and the heat exchange area of the heat exchange assembly is increased.

[0032] In some embodiments, all the first straight pipe sections and all the first elbow pipe sections in a single heat exchange channel part constitute a bending main body, the plurality of straight pipe sections in the single heat exchange channel part include a second straight pipe section, the second straight pipe section in the same heat exchange channel part is located on at least one side of the bending main body along the second direction, and the second straight pipe section extends along the first direction and is connected with the first straight pipe section in the same heat exchange channel part.

[0033] In the technical solution, the second straight pipe section in the same heat exchange channel part is arranged on at least one side of the bending main body along the second direction, so that the pipe arrangement density of the single heat exchange channel part is increased, and the heat exchange area of the heat exchange unit is increased.

[0034] In some embodiments, the minimum interval d3 of the first elbow pipe section and the second straight pipe section in the same heat exchange channel part along the second direction is greater than or equal to 20 mm.

[0035] In the technical solution, the minimum interval d3 between the first elbow pipe section and the second straight pipe section in the same heat exchange channel part is not less than 20 mm, so that the second straight pipe section has a larger interval with the first elbow pipe section, and the risk of interference between the second straight pipe section and the first elbow pipe section in the process of bending the first elbow pipe section by the bending die is reduced, so that the heat exchange channel part has a higher arrangement density, and the difficulty of the bending process of the heat exchange channel part is reduced.

[0036] In some embodiments, all the first straight tube segments and all the first elbow tube segments in a single heat exchange channel part constitute a bending body, the heat exchange unit is two, the bending bodies of the two heat exchange units are arranged along the first direction, and the two heat exchange units are respectively a first heat exchange unit and a second heat exchange unit; wherein the first heat exchange unit comprises one second straight tube segment, the second straight tube segment of the first heat exchange unit is located on one side of the bending body of the first heat exchange unit along the second direction, the second heat exchange unit comprises two second straight tube segments, the two second straight tube segments of the second heat exchange unit are located on both sides of the bending body of the second heat exchange unit along the second direction, the bending body has opposite first and second sides in the second direction, the second straight tube segment of the first heat exchange unit and one of the second straight tube segments in the second heat exchange unit are both located on the first side and arranged along the first direction, and the other second straight tube segment in the second heat exchange unit is located on the second side and extends to one side of the bending body of the first heat exchange unit along the second direction.

[0037] In the above technical solution, the heat exchange unit is provided as two, which can increase the heat exchange area of the heat exchange assembly, and the bending bodies of the two heat exchange units are arranged along the first direction in sequence, which can increase the arrangement density of the two heat exchange units, so that the arrangement density of the pipelines of the entire heat exchange assembly is large, and the heat exchange area of the heat exchange assembly is better improved, so that the heat exchange efficiency of the heat exchange assembly for the battery monomer assembly can be better improved; and by reasonably arranging the second straight tube segment of the first heat exchange unit and the second straight tube segment of the second heat exchange unit on opposite sides of the bending body along the second direction, the pipeline arrangement density of the heat exchange assembly can be further improved, and the heat exchange area of the heat exchange assembly can be improved.

[0038] In some embodiments, the minimum distance d3 between the first elbow tube segment and the second straight tube segment in the same heat exchange channel part in the second direction, and the minimum distance d4 between the second straight tube segment on the second side in the second heat exchange unit and the first elbow tube segment in the first heat exchange unit in the second direction are less than d3.

[0039] In the above technical solution, the distance between the first elbow tube segment and the second straight tube segment of different heat exchange units can be set to be smaller by taking advantage of the characteristic that the distance is not limited by the bending process, which can increase the pipeline arrangement density of the heat exchange assembly, so that the heat exchange area of the heat exchange assembly can be increased.

[0040] In some embodiments, the battery cell assembly comprises one or more battery cell rows arranged along the first direction, each of the battery cell rows comprising a plurality of battery cells arranged along the second direction.

[0041] In the above technical solution, by arranging the battery cell assembly to comprise one or more battery cell rows arranged along the first direction and each of the battery cell rows comprising a plurality of battery cells arranged along the second direction, the plurality of battery cell rows in the battery cell assembly can be arranged in order and compactly, and the capacity of the battery device can be improved; and by arranging the plurality of battery cells in each of the battery cell rows in a direction intersecting the extension direction of the first straight pipe segment, each first straight pipe segment can be in thermal contact with the plurality of battery cells in a single battery cell row as much as possible, so that the single first straight pipe segment can perform heat exchange on the plurality of battery cells in the battery cell row, the heat exchange efficiency can be improved, and the heat exchange of the plurality of battery cells in the battery cell row can be more uniform.

[0042] In some embodiments, at least one of the heat exchange units satisfies the relationship W=(N*A-B) / (n*N+(n*N-1)*(2k-1)), N is the total number of the battery cell rows, the number of the first straight pipe segments corresponding to each of the battery cell rows is the same and is n, A is the size of a single battery cell row in the first direction, the two sides of the bending body along the first direction are a first side and a second side respectively, the two side edges of the battery cell rows in heat exchange with the same bending body along the first direction are a first side edge and a second side edge respectively, the bending body is located between the first side edge and the second side edge, the first side is adjacent to the first side edge and the distance between the first side and the first side edge in the first direction is B1, the second side is adjacent to the second side edge and the distance between the second side and the second side edge in the first direction is B2, and B is the sum of B1 and B2.

[0043] In the above technical solution, by making at least one heat exchange unit satisfy the formula W=(N*A-B) / (n*N+(n*N-1)*(2k-1)), the formula can be used as a bending selection design parameter constraint, and when the heat exchange unit is processed and bent, the selection can be quickly selected according to the selection model after inputting the requirements, so that the processing and bending process selection of heat exchange units of different specifications and sizes is more convenient.

[0044] In some embodiments, the width W of the heat exchange runner part is greater than the thickness t of the battery cell.

[0045] In the technical solution, the width W of the heat exchange flow channel part is greater than the thickness t of the battery monomer, so that the width of the heat exchange flow channel part is large, the heat exchange area of the heat exchange flow channel part is increased, and the heat exchange efficiency of the heat exchange assembly on the battery monomer assembly is improved.

[0046] In some embodiments, the ratio of the width W of the heat exchange flow channel part to the thickness t of the battery monomer is less than 2.

[0047] In the technical solution, the width W of the heat exchange flow channel part is greater than the thickness t of the battery monomer, so that the width of the heat exchange flow channel part is large, the heat exchange area of the heat exchange flow channel part is increased, and the heat exchange efficiency of the heat exchange assembly on the battery monomer assembly is improved.

[0048] In some embodiments, the heat exchange flow channel part is formed as a heat exchange flat tube, the thickness direction of the heat exchange flow channel part is consistent with the third direction, and at least one side surface in the thickness direction of the heat exchange flow channel part is in thermal contact or thermal connection with the battery monomer assembly.

[0049] In the technical solution, the heat exchange flow channel part is set as a heat exchange flat tube, and at least one side surface in the thickness direction of the heat exchange flow channel part is in thermal contact or thermal connection with the battery monomer assembly, so that the heat conduction area of the heat exchange flow channel part and the battery monomer assembly is increased, and the heat exchange efficiency of the heat exchange unit on the battery monomer assembly is improved.

[0050] In some embodiments, the surface of the heat exchange flow channel part in thermal contact or thermal connection with the battery monomer assembly is a heat exchange surface, and the heat exchange surface is a plane.

[0051] In the technical solution, the heat exchange surface of the heat exchange flow channel part is set as a plane, so that the heat exchange flow channel part is better attached to the battery monomer, the heat conduction area of the heat exchange flow channel part and the battery monomer assembly is increased, and the heat exchange efficiency of the heat exchange unit on the battery monomer assembly is improved.

[0052] In some embodiments, the total projection area of all the heat exchange units along the third direction is a first projection area, the total projection area of all the battery monomers along the third direction is a second projection area, and the ratio of the first projection area to the second projection area is greater than 1 / 3.

[0053] In the technical solution, the ratio of the total projection area of all heat exchange units along the third direction to the total projection area of all battery monomers along the third direction is greater than 1 / 3, so that the heat conduction area between the heat exchange unit and the battery monomer assembly is large, and the heat exchange efficiency of the heat exchange assembly on the battery monomer assembly is high.

[0054] In some embodiments, the inner wall of the box is formed with a containing groove, the shape of the containing groove is matched with the shape of the heat exchange unit, and the heat exchange unit is arranged in the containing groove.

[0055] In the technical solution, the containing groove for arranging the heat exchange unit is arranged on the inner wall of the box, so that the installation and positioning of the unit are facilitated.

[0056] In some embodiments, the inner wall of the box is formed with a plurality of ribs, and the plurality of ribs cooperatively define the containing groove.

[0057] In the technical solution, the plurality of ribs are formed on the inner wall of the box, and the containing groove is defined by the plurality of ribs, so that the forming process of the containing groove is facilitated, and the plurality of ribs can improve the structural strength of the box.

[0058] In some embodiments, part of the box is inwardly protruded to form the plurality of ribs.

[0059] In the technical solution, part of the box is inwardly protruded to form the plurality of ribs, so that the processing of the ribs is facilitated, and the structural strength of the box is improved without increasing the weight of the box.

[0060] In some embodiments, the box includes a bottom plate, and the heat exchange assembly is mounted on the bottom plate.

[0061] In the technical solution, the heat exchange assembly is arranged on the bottom plate of the box, so that the heat exchange assembly is arranged at a lower position in the box, the installation and fixation of the heat exchange assembly are facilitated, and the center of gravity of the battery device is low, so that the battery device is stable and reliable.

[0062] In some embodiments, the ratio of the size of the box in the first direction to the size of the box in the second direction is greater than 2, and the second direction intersects the first direction.

[0063] In the technical solution, the size of the box of the battery device in the first direction is significantly greater than the size of the box in the second direction, so that the battery device is substantially rectangular, and when the battery device is applied to a vehicle, the first direction of the box is arranged along the longitudinal direction of the vehicle, the longitudinal space of the vehicle can be fully utilized, and the capacity of the battery device is improved.

[0064] In some embodiments, a ratio of a dimension of the housing in a third direction to a dimension of the housing in a second direction is less than 0.3, the third direction intersecting the second direction.

[0065] In the above technical solution, by setting the dimension of the housing in the up-down direction to be small, the battery device as a whole can be flat, and when the battery device is used in a vehicle, the battery device can reduce the occupation of the Z-direction space of the vehicle, which is beneficial to the layout of other components in the vehicle; and when the battery device is installed at the bottom of the vehicle, the bottom surface height position of the battery device will not be too low to cause easy scratch damage, and during the driving of the vehicle, the risk of scratch damage of the battery device can be reduced.

[0066] In a second aspect, the utility model provides a kind of electric device, comprising: the battery device of the utility model first aspect embodiment.

[0067] In the above technical solution, by setting the battery device, the temperature regulation efficiency of the heat exchange component of the battery device to battery monomer component is higher, and in the process of processing bending, the heat exchange unit of heat exchange component is bent into shape with heat exchange runner portion.

[0068] In some embodiments, the electric device is a vehicle, and a longitudinal direction of the vehicle is a first direction.

[0069] In the above technical solution, when the battery device is used in a vehicle and the longitudinal direction of the vehicle is a first direction, the temperature regulation efficiency of the heat exchange component of the battery device to battery monomer component is higher, 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 improving the capacity of the battery device.

[0070] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0071] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0072] Figure 1 is a schematic diagram of a battery device according to some embodiments of the present application.

[0073] Figure 2 is an exploded view of one angle of a battery device according to some embodiments of the present application.

[0074] Figure 3is an exploded view of another angle of the battery device according to some embodiments of the present application.

[0075] Figure 4 is a structural schematic view of the bottom plate and the battery cell assembly of the battery device according to some embodiments of the present application.

[0076] Figure 5 is a cooperation schematic view of the heat exchange assembly and the battery cell assembly according to some embodiments of the present application.

[0077] Figure 6 is a front view of the heat exchange assembly according to some embodiments of the present application.

[0078] Figure 7 is a sectional view along Figure 6 G-G line in FIG.

[0079] Figure 8 is an enlarged view of H in Figure 7 FIG.

[0080] Figure 9 is a schematic view of the power utilization device according to some embodiments of the present application.

[0081] Reference Signs:

[0082] 1000, power utilization device;

[0083] 100, battery device;

[0084] 10, box body; 11, bottom plate; 111, convex rib; 112, accommodating groove; 12, mounting beam; 13, top cover;

[0085] 20, battery cell assembly;

[0086] 30, battery cell row; 301, battery cell; 31, first side edge; 32, second side edge;

[0087] 50, heat exchange assembly;

[0088] 5, heat exchange unit; 5a, heat exchange flow passage part; 51a, heat exchange flow passage; 511a, sub flow passage; 5b, flow dividing rib; 51, straight pipe section; 511, first straight pipe section; 512, second straight pipe section; 513, third straight pipe section; 514, fourth straight pipe section; 52, elbow pipe section; 521, first elbow pipe section; 522, second elbow pipe section; 523, third elbow pipe section; 524, fourth elbow pipe section; 53, bending body; 531, first side edge; 532, second side edge; 54, heat exchange surface;

[0089] 501, first heat exchange unit; 502, second heat exchange unit;

[0090] 60, liquid inlet structure; 6, current collector; 61, liquid inlet; 62, liquid outlet; 63, liquid outlet cavity;

[0091] 200, vehicle body. DETAILED DESCRIPTION

[0092] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0093] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing specific embodiments of the present application and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0094] In the present application, the phrase "embodiments" means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0095] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium; it can be internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0096] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

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

[0098] “Multiple” appearing in the present application means two or more (including two).

[0099] In the embodiments of the present application, all the embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions if there is no special description.

[0100] In the embodiments of the present application, all the technical features and optional technical features of the present application can be combined with each other to form new technical solutions if there is no special description.

[0101] In the embodiments of the present application, the battery apparatus can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component. For example, the battery cell assembly is usually formed by arranging a plurality of battery cells; the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0102] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging; the battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which are not limited in the embodiments of the present application. The battery cell can be a flat body, a cuboid, etc.

[0103] The battery apparatus can be a battery pack including a box body and one or more battery cell assemblies accommodated in the box body. The battery cell assembly can be a battery module, which can be accommodated in the box body by fixing the battery module in the box body; the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells in the box body.

[0104] In embodiments of the present application, the box can include a first box and a second box. The first box and the second box are buckled so that the inside of the box forms a closed space to accommodate the battery monomer assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate. For example, the box can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that the inside of the box forms a closed space to accommodate the battery monomer assembly.

[0105] In embodiments of the present application, the box can be part of the chassis structure of the vehicle. For example, part of the box can be at least part of the floor of the vehicle, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0106] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery monomers, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes airplanes, rockets, space shuttles and spaceships, etc.

[0107] At present, from the development of market situation, the application of battery is more and more widely. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0108] In the process of today's technological development, the performance optimization of the battery device is very important. Higher requirements are put forward for the arrangement of the internal battery monomers. On the one hand, the space utilization rate in the box is improved, and more energy is stored in the limited space. On the other hand, the compactness of multiple battery monomers is indispensable, and the close arrangement can reduce the volume and adapt to more scenes.

[0109] Based on this, the present application proposes a battery device, so that the multiple battery monomers of the battery monomer assembly are arranged transversely (i.e. arranged along the width direction of the box), which can better reduce the occupation area in the box, can fully utilize the space in the width direction of the box, reduce the occupation in the longitudinal direction of the box (i.e. the length direction of the box), make the layout of the battery monomer assembly more compact. Therefore, the space utilization rate in the box can be improved, more installation space is left for other components, and the installation of the battery device in the limited space is more flexible.

[0110] The vehicle disclosed in the present application can be a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle or a range extended vehicle, etc. The vehicle is internally provided with a battery device, which can be arranged at the bottom of the vehicle. The battery device can be used for power supply of the vehicle, for example, can be used as a driving power source of the vehicle, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle. The battery device can not only be used as a driving power source of the vehicle, but also be used as an operating power source of the vehicle. The vehicle can further include a controller and a motor, and the controller is used to control the battery device to supply power to the motor, for example, to meet the working power demand of the vehicle during starting, navigation and driving.

[0111] Please refer to Figure 1 , Figure 1 is a schematic view of a battery device 100 according to some embodiments of the present application; please refer to Figure 2 , Figure 2 is an exploded view of one angle of the battery device 100 according to some embodiments of the present application. Please refer to Figure 3 , Figure 3 is an exploded view of another angle of the battery device 100 according to some embodiments of the present application. Please refer to Figure 4 , Figure 4 is a structural schematic view of the bottom plate 11 and the battery cell assembly 20 of the battery device 100 according to some embodiments of the present application.

[0112] In some embodiments of the present application, the battery device 100 includes a box body 10 and a battery cell assembly 20, the battery cell assembly 20 is arranged in the box body 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 arranged in a second direction Y in a stacked manner, and satisfy: S is the sum of the number of battery cells 301 of the plurality of battery cell assemblies 20, W b is the inner width of the box body 10, t is the width of each battery cell 301, A is the length of each battery cell 301, W c is a set gap that needs to be satisfied between the battery cell assembly 20 and the side wall of the box body 10 in the width direction of the box body 10 when the second direction Y is the width direction of the box body 10; W d is a set gap that needs to be satisfied between the battery cell assembly 20 and the side wall of the box body 10 in the width direction of the box body 10 when the second direction Y is the length direction of the box body 10. The length of the box body 10 is greater than the width of the box body 10. The square brackets in the formula represent the integer function.

[0113] Exemplarily, the accommodating cavity in the box 10 is a cuboid cavity, the battery monomer 301 is a cuboid battery, and the product of A*t in the above battery device 100 represents the occupation area of a single battery monomer 301. Therefore, the product of S*A*t represents the occupation area of all battery monomers 301, the bottom area of the accommodating cavity of the box 10, and the set gap required when the battery monomer assembly 20 is arranged in the box 10.W b -W c represents the size of the plurality of battery monomers 301 when the plurality of battery monomers 301 are arranged transversely (i.e., arranged along the width direction of the box 10), or also represents the number of the plurality of battery monomer assemblies 20 arranged in the width direction of the box 10, W b -W d represents the size of the plurality of battery monomers 301 when the plurality of battery monomers 301 are arranged longitudinally (i.e., arranged along the length direction of the box 10), or also represents the number of the plurality of battery monomers 301 arranged in the width direction of the box 10, wherein W c The set gap represented by S represents the heat dissipation requirement of the battery monomer assembly 20, the expansion space reserved when the battery monomer assembly 20 expands, and the installation space of various components in the box 10, W d The set gap represented by S represents the safety gap when the battery monomer assembly 20 is arranged in the box 10, exemplarily, W d <W c .

[0114] The battery monomer assembly 20 satisfying the above conditions can better reduce the occupation area in the box 10 according to the size of the battery monomer 301 and the size of the accommodating cavity inside the box 10, can fully utilize the space in the width direction of the box 10, reduce the occupation in the longitudinal direction of the box 10 (i.e., the length direction of the box 10), and make the layout of the battery monomer assembly 20 more compact. Therefore, the space utilization in the box 10 can be improved, more installation space is left for other components, and the installation of the battery device 100 in the limited space is more flexible.

[0115] Exemplarily, in combination with Figure 4 , the battery monomer assembly 20 can be provided at least one, and when the battery monomer assembly 20 is a plurality, the plurality of battery monomer assemblies 20 are arranged in the first direction X, the battery monomer assembly 20 includes a plurality of battery monomers 301, and the plurality of battery monomers 301 in the battery monomer assembly 20 are arranged in layers along the second direction Y. The first direction X can be the length direction of the box 10, and the second direction Y can be the width direction of the box 10.

[0116] 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.

[0117] In some embodiments of this application, 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;

[0118] For example, W c Available sizes are: 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, and 120mm.

[0119] 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.

[0120] In some embodiments of this application, 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.

[0121] For example, W d Available sizes are: 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, and 120mm.

[0122] In the above example, when the battery cell assembly 20 is arranged longitudinally, a reasonable setting gap W is set. d, can provide heat dissipation space for the battery monomer 301 and prevent overheating. At the same time, it can buffer external impact to a certain extent and protect the battery monomer 301. A suitable gap ensures the safe and stable operation of the battery device 100 and prolongs the service life of the battery.

[0123] In some embodiments of the present application, W c is greater than W d . That is, a larger W c gap can provide better heat dissipation channels for the battery monomer assembly 20 in the width direction, reducing the risk of battery performance degradation due to heat accumulation. Secondly, during installation and maintenance, W c a larger gap facilitates the operator to operate the battery monomer assembly 20 from the width direction of the box 10, improving work efficiency. At the same time, it also reserves sufficient space for possible wiring and other structures.

[0124] In some embodiments of the present application, the box 10 includes a top plate 13 and a bottom plate 11 spaced apart in the height direction of the box 10, and the battery monomer 301 is provided with a pole column on the side facing the top plate 13. In the height direction of the box 10, the height Hi of the battery monomer 301 satisfies: 110mm≤Hi≤140mm, wherein the height Hi of the battery monomer 301 is the distance between the surface of the pole column facing the top plate 13 and the surface of the bottom plate 11 facing the top plate 13.

[0125] Exemplarily, the height Hi of the battery monomer 301 can be 112mm, 115mm, 118mm, 120mm, 122mm, 125mm, 128mm, 130mm, 132mm, 135mm.

[0126] In the above examples, the shorter battery monomer 301 occupies less space in the height direction of the box 10, which is conducive to the design of a low box 10. The low box 10 can lower the overall center of gravity of the equipment and improve stability. At the same time, it is more advantageous in some application scenarios with limited space height, such as the limited space at the bottom of an electric vehicle. This design can improve space utilization and provide more possibilities for the installation of other components, and also helps to optimize the aerodynamic performance of the vehicle.

[0127] In some embodiments of the present application, with reference to Figure 3 and Figure 5 , Figure 5 is a schematic view of the cooperation between the heat exchange assembly 50 and the battery monomer assembly 20 in some embodiments of the present application. The battery device 100 further comprises a heat exchange assembly 50, and the heat exchange assembly 50 is used for heat exchange with the battery monomer 301. The heat exchange assembly 50 comprises a first heat exchange part and a second heat exchange part. The first heat exchange part is bent and extended and defines a U-shaped region. The second heat exchange part is arranged in the U-shaped region and is bent and connected to one end of the first heat exchange part.

[0128] In the above examples, the U-shaped region formed by the bending and extending of the first heat exchange part can better fit the external contour of the battery monomer assembly 20, especially when the battery monomers 301 are arranged transversely along the width direction of the box 10, the U-shaped region can fully cover the battery monomers 301, ensuring uniform heat exchange. The second heat exchange part is arranged in the U-shaped region and connected with the first heat exchange part, further increasing the heat exchange area and improving the heat exchange efficiency. This design can effectively remove the heat generated by the battery monomers 301 during operation in time, prevent the battery temperature from being too high, thereby prolonging the service life of the battery and ensuring the stability of the battery performance. At the same time, efficient heat exchange helps to improve the safety of the entire battery device 100 and reduce the risk of thermal runaway.

[0129] In related technologies, in order to make the battery device 100 work in a suitable temperature range, a heat exchange assembly 50 is usually arranged to exchange heat with the battery monomers 301 of the battery device 100 to adjust the temperature of the battery monomers 301. The heat exchange assembly 50 in related technologies uses heat exchange pipes to exchange heat. However, due to the structural limitations of the heat exchange pipes, the temperature adjustment efficiency of the heat exchange assembly 50 on the battery monomer assembly 20 is low. Therefore, how to improve the temperature adjustment efficiency of the heat exchange assembly 50 in the form of heat exchange pipes on the battery monomer assembly 20 is a technical problem to be solved.

[0130] Based on this, referring to Figures 1-5 , Figure 5 is a schematic view of the cooperation between the heat exchange assembly 50 and the battery monomer assembly 20 of some embodiments of the present application. The present application provides a battery device 100, which comprises a box 10, a battery monomer assembly 20 and a heat exchange assembly 50. The battery monomer assembly 20 is arranged in the box 10, and the battery monomer assembly 20 comprises a plurality of battery monomers 301. The heat exchange assembly 50 is used to exchange heat with the battery monomers 301, and the heat exchange assembly 50 comprises at least one heat exchange unit 5. The heat exchange unit 5 has a heat exchange flow channel part 5a, which has a heat exchange flow channel 51a for conducting heat exchange medium. The heat exchange flow channel part 5a comprises a straight pipe segment 51 extending along a straight line and a bent pipe segment 52 extending along an arc. In the extension direction of the heat exchange unit 5, the bent pipe segment 52 connects two adjacent straight pipe segments 51. The ratio of the bending radius R of the bent pipe segment 52 to the width W of the heat exchange flow channel part 5a is k, and k is greater than 0.5.

[0131] The heat exchange flow channel part 5a can be a tubular structure.

[0132] The heat exchange component 50 used for heat exchange with the battery monomer 301 can be understood as that the heat exchange component 50 and the battery monomer 301 have a heat conduction relationship, for example, the heat exchange component 50 and the battery monomer 301 are in heat conduction contact or heat conduction connection, so as to realize heat exchange between the heat exchange component 50 and the battery monomer 301. The heat exchange component 50 can be used to increase the temperature of the battery monomer 301, and the heat exchange component 50 can also be used to reduce the temperature of the battery monomer 301. The temperature of the battery device 100 and the temperature of the battery device 100 itself can be determined according to the environment temperature.

[0133] The heat exchange medium can be a liquid, for example, the heat exchange medium can include water or a mixture of water and other liquids. During the flow of the heat exchange medium along the heat exchange flow channel 51a, the heat exchange medium can take away the heat generated by the battery monomer 301 or the heat exchange medium can heat the battery monomer 301.

[0134] Optionally, the elbow section 52 can be semicircular.

[0135] The bending radius R of the elbow section 52 refers to the curvature radius of the circular arc where the center line s of the elbow section 52 is located.

[0136] The width direction of the heat exchange flow channel part 5a, the extension direction of the heat exchange flow channel part 5a and the thickness direction of the heat exchange flow channel part 5a are perpendicular to each other, and the battery monomer 301 can be in heat conduction connection or heat conduction contact with at least one side of the thickness direction of the heat exchange flow channel part 5a.

[0137] In the above technical solution, the heat exchange component 50 for adjusting the temperature of the battery monomer 301 is provided to include at least one heat exchange unit 5. By arranging the heat exchange flow channel part 5a of the heat exchange unit 5 to include the straight pipe section 51 and the elbow section 52 connected between the straight pipe sections 51, the heat exchange flow channel part 5a can be bent and extended, the heat exchange area of the heat exchange unit 5 and the battery monomer assembly 20 can be increased, and the temperature adjustment efficiency of the heat exchange component 50 on the battery monomer assembly 20 can be improved. And by making the ratio of the bending radius of the elbow section 52 to the width of the heat exchange flow channel part 5a greater than 0.5, the heat exchange flow channel part 5a can be conveniently bent and formed during the processing of the bent heat exchange unit 5.

[0138] In some embodiments, the value of k ranges from 1.0 to 1.5.

[0139] In the technical solution, the ratio k of the bending radius of the bent pipe section 52 to the width of the heat exchange flow channel section 5a is not less than 1.0, so that the process difficulty of the heat exchange unit 5 in the bending process can be reduced, and the ratio k of the bending radius of the bent pipe section 52 to the width of the heat exchange flow channel section 5a is not greater than 1.5, so that the heat exchange area of the heat exchange unit 5 is large. By setting the ratio k of the bending radius of the bent pipe section 52 to the width of the heat exchange flow channel section 5a to be between 1.0 and 1.5, the bending process difficulty and the heat exchange area of the heat exchange unit 5 can be better balanced, so that the processing difficulty of the heat exchange assembly 50 is reduced and the heat exchange area is large.

[0140] In some embodiments, with reference to Figure 5 and Figure 6 , Figure 6 is a front view of the heat exchange assembly of some embodiments of the present application. The plurality of straight pipe sections 51 in a single heat exchange flow channel section 5a includes a plurality of first straight pipe sections 511 arranged in sequence along a first direction X, each first straight pipe section 511 extending along a second direction Y, and the plurality of bent pipe sections 52 in a single heat exchange flow channel section 5a includes a first bent pipe section 521 connected between the same end of two adjacent first straight pipe sections 511 along the second direction Y. The orthographic projection of the first straight pipe section 511 and the first bent pipe section 521 along a third direction Z are both located within the orthographic projection of the battery monomer assembly 20 along the third direction Z, and the third direction Z, the second direction Y and the first direction X intersect with each other.

[0141] Wherein, the first direction X can refer to the X direction in the drawings, the second direction Y can refer to the Y direction in the drawings, and the third direction Z can refer to the Z direction in the drawings. The thickness direction of the heat exchange flow channel section 5a can be consistent with the third direction Z.

[0142] In the technical solution, by arranging the plurality of first straight pipe sections 511 of a single heat exchange unit 5 along the first direction X and connecting the adjacent two first straight pipe sections 511 through the first bent pipe section 521, the arrangement density of the pipe of the heat exchange unit 5 can be improved, so that the heat exchange area of the heat exchange unit 5 can be further improved, and the temperature regulation efficiency of the heat exchange assembly 50 for the battery monomer assembly 20 can be further improved.

[0143] In some embodiments, with reference to Figure 5 and Figure 6 , the extension length L of the first straight pipe section 511 is greater than or equal to 50 mm.

[0144] For example, the extension length L of the first straight pipe section 511 is 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 90 mm, etc.

[0145] In the technical scheme, in the process of bending the heat exchange channel part 5a of the heat exchange unit 5 by using the bending die to form the first straight pipe section 511 and the first elbow pipe section 521 connected between the adjacent two first straight pipe sections 511, the first straight pipe section 511 needs to be clamped and fixed to be bent to form the first elbow pipe section 521, and by arranging the first straight pipe section 511 along the first direction X to have an extension length of not less than 50 mm, the first straight pipe section 511 can be clamped and fixed with a longer length, the clamping and fixing reliability of the first straight pipe section 511 is improved, and thus the bending forming quality of the heat exchange unit 5 can be improved.

[0146] In some embodiments, with reference to Figure 5 and Figure 6 , the interval d1 of the adjacent two first straight pipe sections 511 in the same heat exchange channel part 5a along the first direction X is greater than the width W of the first straight pipe section 511.

[0147] In the technical scheme, by arranging the interval d1 of the adjacent two first straight pipe sections 511 in the same heat exchange channel part 5a along the first direction X to be greater than the width W of the first straight pipe section 511, the bending process difficulty of the first elbow pipe section 521 of the heat exchange unit 5 can be reduced.

[0148] In some embodiments, the ratio of the interval d1 of the adjacent two first straight pipe sections 511 in the same heat exchange channel part 5a along the first direction X to the width W of the first straight pipe section 511 is less than 2.

[0149] For example, the ratio of the interval d1 of the adjacent two first straight pipe sections 511 in the same heat exchange channel part 5a along the first direction X to the width W of the first straight pipe section 511 is 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, etc.

[0150] In the technical scheme, on the basis of arranging the interval d1 of the adjacent two first straight pipe sections 511 in the same heat exchange channel part 5a along the first direction X to be greater than the width W of the first straight pipe section 511, the ratio of the interval d1 of the adjacent two first straight pipe sections 511 in the same heat exchange channel part 5a along the first direction X to the width W of the first straight pipe section 511 is simultaneously arranged to be less than 2, that is, the ratio of the interval d1 of the adjacent two first straight pipe sections 511 in the same heat exchange channel part 5a along the first direction X to the width W of the first straight pipe section 511 is greater than 1 and less than 2, so that the bending process difficulty of the first elbow pipe section 521 of the heat exchange unit 5 is reduced, and meanwhile, the arrangement density of the plurality of first straight pipe sections 511 along the first direction X can be large, so that the bending process difficulty and the heat exchange area of the heat exchange unit 5 can be well balanced.

[0151] In some embodiments, the ratio of the extension length of the first straight pipe section 511 to the extension length of the first elbow pipe section 521 is 0.7-2.

[0152] 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.

[0153] In the above technical solution, by making the ratio of the extension length of the first straight pipe section 511 to the extension length of the first bent pipe section 521 not less than 0.7, the extension length of the first bent pipe section 521 can be made larger, so that the first bent pipe section 521 has a larger bending radius, thereby reducing the bending process difficulty of the first bent pipe section 521, and at the same time, by making the ratio of the extension length of the first straight pipe section 511 to the extension length of the first bent pipe section 521 not greater than 2, the extension length of the first bent pipe section 521 can be made appropriate so that the spacing of adjacent first straight pipe sections 511 along the first direction X is not too large, and by making the ratio of the extension length of the first straight pipe section 511 to the extension length of the first bent pipe section 521 be 0.7-2, the bending process difficulty and the heat exchange area of the heat exchange unit 5 can be well balanced.

[0154] In some embodiments, referring to Figure 5 and Figure 6 all the first straight pipe sections 511 and all the first bent pipe sections 521 in a single heat exchange flow passage part 5a constitute a bending body 53, and the heat exchange unit 5 is multiple, and the bending bodies 53 of the multiple heat exchange units 5 are arranged in sequence along the first direction X.

[0155] A single heat exchange unit 5 has one heat exchange flow passage part 5a, and all the first straight pipe sections 511 and all the first bent pipe sections 521 in the single heat exchange flow passage part 5a constitute a bending body 53, which can be understood as: all the first straight pipe sections 511 and all the first bent pipe sections 521 in a single heat exchange unit 5 constitute a bending body 53. In this way, each heat exchange unit 5 has one bending body 53, and multiple heat exchange units 5 have multiple bending bodies 53.

[0156] In the above technical solution, the heat exchange unit 5 is provided as multiple, which can improve the heat exchange area of the heat exchange assembly 50, and the bending bodies 53 of the multiple heat exchange units 5 are arranged in sequence along the first direction X, which can improve the arrangement density of the multiple heat exchange units 5, so that the arrangement density of the pipelines of the entire heat exchange assembly 50 is larger, and the heat exchange area of the heat exchange assembly 50 is better improved, thereby the heat exchange efficiency of the heat exchange assembly 50 on the battery monomer assembly 20 can be better improved.

[0157] In some embodiments, referring to Figure 5 and Figure 6The distance between the two adjacent first straight pipe sections 511 in the same bending body 53 in the first direction X is d1, and the distance between the two adjacent first straight pipe sections 511 in the adjacent bending bodies 53 in the first direction X is d2, and d2 is less than d1.

[0158] In the above technical solution, by using the characteristic that the distance d2 between the two adjacent first straight pipe sections 511 in the adjacent bending bodies 53 in the first direction X is not affected by the bending process, the distance between the two adjacent first straight pipe sections 511 in the adjacent bending bodies 53 in the first direction X is set to be relatively small, which is beneficial to increase the pipe arrangement density of the heat exchange assembly 50 without increasing the difficulty of the bending process, thereby increasing the heat exchange area of the heat exchange assembly 50.

[0159] In some embodiments, referring to Figure 5 and Figure 6 All the first straight pipe sections 511 and all the first elbow pipe sections 521 in a single heat exchange flow channel part 5a constitute a bending body 53, the plurality of straight pipe sections 51 in a single heat exchange flow channel part 5a include second straight pipe sections 512, the second straight pipe sections 512 in the same heat exchange flow channel part 5a are located on at least one side of the bending body 53 along the second direction Y, and the second straight pipe sections 512 extend along the first direction X and are connected to the first straight pipe sections 511 in the same heat exchange flow channel part 5a.

[0160] In the above technical solution, by arranging the second straight pipe sections 512 in the same heat exchange flow channel part 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 flow channel part 5a can be improved, and the heat exchange area of the heat exchange unit 5 can be increased.

[0161] In some embodiments, referring to Figure 5 and Figure 6 The minimum distance d3 between the first elbow pipe section 521 and the second straight pipe section 512 in the same heat exchange flow channel part 5a in the second direction Y is greater than or equal to 20 mm.

[0162] For example, the minimum distance d3 between the first elbow pipe section 521 and the second straight pipe section 512 in the same heat exchange flow channel part 5a in the second direction Y is 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, etc.

[0163] In the technical scheme, the minimum distance d3 between the first elbow pipe section 521 and the second straight pipe section 512 in the same heat exchange runner part 5a is not less than 20 mm, so that the second straight pipe section 512 and the first elbow pipe section 521 have a larger distance, the risk of interference between the second straight pipe section 512 and the first elbow pipe section 521 in the process of bending the heat exchange runner part 5a by the bending die is reduced, and the bending process difficulty of the heat exchange runner part 5a is reduced while the heat exchange runner part 5a has a higher arrangement density.

[0164] In some embodiments, referring to Figure 5 and Figure 6 The plurality of elbow pipe sections 52 in the single heat exchange runner part 5a includes a second elbow pipe section 522, and the second elbow pipe section 522 connects the first straight pipe section 511 and the second straight pipe section 512 in the same heat exchange runner part 5a.

[0165] In the technical scheme, the first straight pipe section 511 and the second straight pipe section 512 in the same heat exchange runner part 5a are connected by the second elbow pipe section 522, so that the pipe arrangement density of the heat exchange runner part 5a is larger, and the heat exchange area of the heat exchange runner part 5a is larger.

[0166] In some embodiments, referring to Figure 5 and Figure 6, all the first straight pipe sections 511 and all the first elbow pipe sections 521 in the single heat exchange flow channel part 5a constitute a bending main body 53, the heat exchange unit 5 is two, the bending main bodies 53 of the two heat exchange units 5 are arranged along the first direction X, and the two heat exchange units 5 are respectively a first heat exchange unit 501 and a second heat exchange unit 502; wherein, the first heat exchange unit 501 comprises one second straight pipe section 512, the second straight pipe section 512 of the first heat exchange unit 501 is located at one side of the bending main body 53 of the first heat exchange unit 501 along the second direction Y, the second heat exchange unit 502 comprises two second straight pipe sections 512, the two second straight pipe sections 512 of the second heat exchange unit 502 are located at two sides of the bending main body 53 of the second heat exchange unit 502 along the second direction Y, the bending main body 53 has opposite first and second sides 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 in the second heat exchange unit 502 are both located at the first side of the bending main 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 in the second heat exchange unit 502 located at the first side of the bending main body 53 in the second direction Y are arranged along the first direction X, the other second straight pipe section 512 in the second heat exchange unit 502 is located at the second side of the bending main body 53 in the second direction Y, and the other second straight pipe section 512 in the second heat exchange unit 502 extends to the side of the bending main body 53 of the first heat exchange unit 501 along the second direction Y.

[0167] In the above technical solution, the heat exchange unit 5 is arranged as two, which can increase the heat exchange area of the heat exchange assembly 50, and the bending main bodies 53 of the two heat exchange units 5 are arranged along the first direction X in sequence, which can increase the arrangement density of the two heat exchange units 5, so that the arrangement density of the pipelines of the entire heat exchange assembly 50 is relatively large, and the heat exchange area of the heat exchange assembly 50 is better improved, so that the heat exchange efficiency of the heat exchange assembly 50 for the battery monomer assembly 20 can be better improved; and by reasonably 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 the opposite two sides of the bending main body 53 along the second direction Y, the pipeline arrangement density of the heat exchange assembly 50 can be further improved, and the heat exchange area of the heat exchange assembly 50 can be increased.

[0168] In some embodiments, referring to Figure 5 and Figure 6 , the minimum distance d3 between the first elbow pipe section 521 and the second straight pipe section 512 in the same heat exchange flow channel part 5a in the second direction Y, the minimum distance d4 between the second straight pipe section 512 located at the second side of the bending main body 53 in the second direction Y in the second heat exchange unit 502 and the first elbow pipe section 521 in the first heat exchange unit 501 in the second direction Y, and d4 is less than d3.

[0169] In the technical solution, the distance between the first bent pipe section 521 and the second straight pipe section 512 of the different heat exchange units 5 can be set smaller, the pipe arrangement density of the heat exchange assembly 50 can be increased, and thus the heat exchange area of the heat exchange assembly 50 can be increased.

[0170] In some embodiments, referring to Figure 5 and Figure 6 the plurality of straight pipe sections 51 in the second heat exchange unit 502 further include a third straight pipe section 513 and a fourth straight pipe section 514, the third straight pipe section 513 is located on a side of the bent main body 53 in the second heat exchange unit 502 away from the bent main body 53 in the first heat exchange unit 501 along the first direction X, the third straight pipe section 513 extends along the second direction Y, the fourth straight pipe section 514 is arranged on a side of the second straight pipe section 512 on the second side away from the bent main body 53 along the second direction Y, the fourth straight pipe section 514 extends along the first direction X, and the third straight pipe section 513 is connected between the second straight pipe section 512 and the fourth straight pipe section 514 of the second heat exchange unit 502.

[0171] In the technical solution, by arranging the third straight pipe section 513 and the fourth straight pipe section 514 in the second heat exchange unit 502, and arranging the bent main bodies 53 of the two heat exchange units 5 in 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, the outer package inner structure is formed, the arrangement of the two heat exchange units 5 can be compact, and the heat exchange area of the heat exchange assembly 50 can be increased.

[0172] In some embodiments, referring to Figure 5 and Figure 6 the plurality of bent pipe sections 52 in the second heat exchange unit 502 further include a third bent pipe section 523 and a fourth bent pipe section 524, the third bent pipe section 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 bent pipe section 524 is connected between the third straight pipe section 513 and the fourth straight pipe section 514.

[0173] In the technical solution, by connecting the second straight pipe section 512 and the third straight pipe section 513 and the third straight pipe section 513 and the fourth straight pipe section 514 of the second heat exchange unit 502 through the bent pipe sections 52, the pipe arrangement density of the heat exchange assembly 50 can be increased, and the heat exchange area of the heat exchange flow channel part 5a can be increased.

[0174] In some embodiments, referring to Figure 5 and Figure 6The distance between the third straight pipe section 513 and the closest first straight pipe section 511 in the first heat exchange unit 501 in the first direction X is d5, and the ratio of d5 to d1 is 0.7-1.5.

[0175] 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.

[0176] In the above technical solution, the third straight pipe section 513 of the second heat exchange unit 502 and the plurality of first straight pipe sections 511 of the two heat exchange units 5 are arranged in the first direction X, and by setting the ratio of the distance d5 between the third straight pipe section 513 and the closest first straight pipe section 511 in the first heat exchange unit 501 to the distance d1 between the two adjacent first straight pipe sections 511 in the same heat exchange flow channel part 5a in the first direction X to be 0.7-1.5, the distance between the straight pipe sections 51 arranged in the first direction X can be made more uniform, thereby making the temperature regulation of the battery monomer 301 by the heat exchange assembly 50 more uniform.

[0177] In some embodiments, with reference to Figure 5 and Figure 6 The distance between the fourth straight pipe section 514 and the second straight pipe section 512 on the second side in the second direction Y is d6, the thickness direction of the battery monomer 301 is consistent with the second direction Y, the thickness of the battery monomer 301 is t, and d6 is less than t.

[0178] For example, the shape of the battery monomer 301 can be a cuboid, and the thickness direction of the battery monomer 301 refers to the direction of the smallest dimension among the three dimensions of length, width, and height of the battery monomer 301.

[0179] In the above technical solution, by setting the distance d6 between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 in the second direction Y to be less than the thickness dimension t of the battery monomer 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 small, which can avoid the situation that a single battery monomer 301 is completely opposite to the gap between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 and cannot achieve effective heat exchange, so that the battery monomer 301 opposite to the gap between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 can be in thermal contact with the heat exchange flow channel part 5a to achieve effective temperature regulation.

[0180] In some embodiments, the ratio of d6 to t is 0.3-0.8.

[0181] For example, the ratio of d6 to t is 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, etc.

[0182] In the technical solution described above, by setting the ratio of the spacing d6 between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 in the second direction Y to the thickness dimension t of the battery monomer 301 in the second direction Y in the range of 0.3-0.8, the battery monomer 301 facing the gap between the fourth straight pipe section 514 and the adjacent second straight pipe section 512 can be in thermal contact with the heat exchange channel part 5a to be effectively temperature-regulated, while facilitating the arrangement of the two heat exchange units 5 and reducing the arrangement difficulty.

[0183] In some embodiments, referring to Figure 5 and Figure 6 , the battery monomer assembly 20 includes one or more battery monomer rows 30 arranged along the first direction X, and each battery monomer row 30 includes a plurality of battery monomers 301 arranged along the second direction Y.

[0184] In the technical solution described above, by setting the battery monomer assembly 20 to include one or more battery monomer rows 30 arranged along the first direction X and each battery monomer row 30 to include a plurality of battery monomers 301 arranged along the second direction Y, the plurality of battery monomer rows 30 in the battery monomer assembly 20 can be orderly and compactly arranged, improving the capacity of the battery device 100; and by making the arrangement direction of the plurality of battery monomers 301 in each battery monomer row 30 intersect the extension direction of the first straight pipe section 511, the heat conduction contact between each first straight pipe section 511 and the plurality of battery monomers 301 in a single battery monomer row 30 can be achieved as much as possible, so that a single first straight pipe section 511 can perform heat exchange on the plurality of battery monomers 301 in the battery monomer row 30, which can improve the heat exchange efficiency and make the heat exchange of the plurality of battery monomers 301 in the battery monomer row 30 more uniform.

[0185] In some embodiments, the projection of the first straight pipe section 511 along the third direction Z is located within the projection of the battery monomer row 30 along the third direction Z.

[0186] In the technical solution described above, by making the projection of the first straight pipe section 511 along the third direction Z be located within the projection of the battery monomer row 30 along the third direction Z, the first straight pipe section 511 can be in sufficient contact with the battery monomer row 30, so that the heat exchange of the first straight pipe section 511 can be fully utilized to regulate the temperature of the battery monomer 301 and improve the heat exchange efficiency of the first straight pipe section 511.

[0187] In some embodiments, referring to Figure 4 , each battery monomer row 30 corresponds to at least one first straight pipe section 511, and the projection of the first straight pipe section 511 corresponding to each battery monomer row 30 along the third direction Z is located within the projection of the corresponding battery monomer row 30 along the third direction Z.

[0188] For example, each battery cell row 30 corresponds to one first straight pipe segment 511, and a projection of the first straight pipe segment 511 along the third direction Z is located within a projection of the battery cell row 30 along the third direction Z.

[0189] For another example, each battery cell row 30 corresponds to two first straight pipe segments 511, and a projection of each of the two first straight pipe segments 511 along the third direction Z is located within a projection of the battery cell row 30 along the third direction Z.

[0190] In the above technical solution, by making the orthographic projection of the at least one first straight pipe segment 511 corresponding to a single battery cell row 30 along the third direction Z be 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 sufficient 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, thereby improving the heat exchange efficiency of the first straight pipe segment 511.

[0191] In some embodiments, referring to Figure 5 , each of at least part of the battery cell rows 30 corresponds to a plurality of first straight pipe segments 511.

[0192] Each of at least part of the battery cell rows 30 corresponding to a plurality of first straight pipe segments 511 includes the following cases: for example, one of the battery cell rows 30 corresponds to a plurality of first straight pipe segments 511; for another example, each of a plurality of battery cell rows 30 corresponds to a plurality of first straight pipe segments 511; and for yet another example, each of the battery cell rows 30 corresponds to a plurality of first straight pipe segments 511.

[0193] In the above technical solution, by making each of at least part of the battery cell rows 30 correspond to a plurality of first straight pipe segments 511, the plurality of first straight pipe segments 511 can exchange heat with a single battery cell row 30, thereby improving the temperature regulation efficiency of the single battery cell row 30.

[0194] In some embodiments, referring to Figure 5 , the number of first straight pipe segments 511 corresponding to each of at least part of the battery cell rows 30 is the same.

[0195] The number of first straight pipe segments 511 corresponding to each of at least part of the battery cell rows 30 is the same, including the following cases: for example, the number of first straight pipe segments 511 corresponding to each of two battery cell rows 30 is the same; and for another example, the number of first straight pipe segments 511 corresponding to each of the battery cell rows 30 is the same.

[0196] In the technical solution, the number of the first straight pipe sections 511 corresponding to each of the at least partial battery cell rows 30 is the same, so that the heat exchange of the at least partial battery cell rows 30 is more uniform, and the temperature adjustment of different battery cell rows 30 is more uniform.

[0197] In some embodiments, referring to Figure 5 and Figure 5 all the first straight pipe sections 511 and all the first elbow pipe sections 521 in the single heat exchange flow channel part 5a constitute a bending body 53, the heat exchange unit 5 is multiple, and the bending bodies 53 of the multiple heat exchange units 5 are arranged along the first direction X, and different bending bodies 53 are used for heat exchange with different battery cell rows 30.

[0198] The different bending bodies 53 are used for heat exchange with different battery cell rows 30, that is, the number of the bending bodies 53 is the same as the number of the battery cell rows 30 and corresponds to the battery cell rows 30 one by one, and each bending body 53 is used for heat exchange with the corresponding battery cell row 30.

[0199] In the technical solution, the heat exchange unit 5 is provided as multiple, the heat exchange area of the heat exchange assembly 50 can be increased, the bending bodies 53 of the multiple heat exchange units 5 are arranged along the first direction X in sequence, the arrangement density of the multiple heat exchange units 5 can be increased, so that the arrangement density of the pipelines of the entire heat exchange assembly 50 is large, the heat exchange area of the heat exchange assembly 50 is better improved, and the heat exchange efficiency of the heat exchange assembly 50 for the battery cell assembly 20 can be better improved; and the different bending bodies 53 are used for heat exchange with the different battery cell rows 30, so that the different battery cell rows 30 can be effectively and uniformly heat exchanged.

[0200] In some embodiments, referring to Figure 5 at least one heat exchange unit 5 satisfies the relationship W=(N*A-B) / (n*N+(n*N-1)*(2k-1)), N is the total number of the battery cell rows 30, the number of the first straight pipe sections 511 corresponding to each of the battery cell rows 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 a first side edge 531 and a second side edge 532, respectively, the two side edges of the battery cell rows 30 for heat exchange with the same bending body 53 along the first direction X are a first side edge 31 and a 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 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.

[0201] In the technical solution described above, by making at least one heat exchange unit 5 satisfy the formula: W=(N*A-B) / (n*N+(n*N-1)*(2k-1)), which can be used as a bending selection design parameter constraint, when processing the bending of the heat exchange unit 5, the selection model can be input according to the demand, so that the processing bending process of the heat exchange unit 5 of different specifications and sizes is more convenient.

[0202] In some embodiments, with reference to Figure 6 , the width W of the heat exchange flow passage part 5a is greater than the thickness t of the battery monomer 301.

[0203] In the technical solution described above, by making the width W of the heat exchange flow passage part 5a greater than the thickness t of the battery monomer 301, the width of the heat exchange flow passage part 5a can be increased, and the heat exchange area of the heat exchange flow passage part 5a can be increased, thereby improving the heat exchange efficiency of the heat exchange assembly 50 for the battery monomer assembly 20.

[0204] In some embodiments, the ratio of the width W of the heat exchange flow passage part 5a to the thickness t of the battery monomer 301 is less than 2.

[0205] For example, the ratio of the width W of the heat exchange flow passage part 5a to the thickness t of the battery monomer 301 is 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, etc.

[0206] In the technical solution described above, by making the width W of the heat exchange flow passage part 5a greater than the thickness t of the battery monomer 301 to increase the heat exchange area of the heat exchange flow passage part 5a, and by making the ratio of the width W of the heat exchange flow passage part 5a to the thickness t of the battery monomer 301 less than 2, the difficulty of the bending process caused by the excessive width of the heat exchange flow passage part 5a and the insufficient structural strength caused by the excessive width of the heat exchange unit 5 can be avoided, thereby making the bending process of the heat exchange flow passage part 5a less difficult and the structural strength of the heat exchange flow passage part 5a higher.

[0207] In some embodiments, with reference to Figure 5 , the heat exchange flow passage part 5a is formed as a heat exchange flat tube, the thickness direction of the heat exchange flow passage part 5a is consistent with the third direction Z, and at least one side surface in the thickness direction of the heat exchange flow passage part 5a is in thermal contact or thermal connection with the battery monomer assembly 20.

[0208] Among them, the cross section of the heat exchange flat tube can be rectangular.

[0209] The heat exchange flow passage part 5a is in thermal contact with the battery monomer assembly 20, which can be direct contact between the heat exchange flow passage part 5a and the battery monomer assembly 20.

[0210] The heat exchange runner part 5a is in heat conduction connection with the battery monomer assembly 20. The heat exchange runner part 5a and the battery monomer assembly 20 can be in heat conduction connection through a heat conduction structure, for example, through a heat conduction adhesive layer.

[0211] In the above technical solution, by setting the heat exchange runner part 5a as a heat exchange flat tube and making at least one side surface of the heat exchange runner part 5a in the thickness direction in heat conduction contact or heat conduction connection with the battery monomer assembly 20, the heat conduction area of the heat exchange runner part 5a and the battery monomer assembly 20 can be increased, and the heat exchange efficiency of the heat exchange unit 5 for the battery monomer assembly 20 can be improved.

[0212] In some embodiments, referring to Figure 5 , the surface of the heat exchange runner part 5a in heat conduction contact or heat conduction connection with the battery monomer assembly 20 is the heat exchange surface 54, and the heat exchange surface 54 is a plane.

[0213] At least one side surface of the heat exchange runner part 5a in the thickness direction is formed as the heat exchange surface 54, and the heat exchange surface 54 is in heat conduction contact or heat conduction connection with the battery monomer assembly 20.

[0214] In the above technical solution, by setting the heat exchange surface 54 of the heat exchange runner part 5a as a plane, the heat exchange runner part 5a can be better attached to the battery monomer 301, the heat conduction area of the heat exchange runner part 5a and the battery monomer assembly 20 can be increased, and the heat exchange efficiency of the heat exchange unit 5 for the battery monomer assembly 20 can be improved.

[0215] In some embodiments, referring to Figures 3-5 , the heat exchange assembly 50 is arranged on at least one side of the battery monomer assembly 20 along the third direction Z.

[0216] For example, the heat exchange assembly 50 can be arranged on one side of the battery monomer assembly 20 along the third direction Z, and the heat exchange assembly 50 can also be arranged on both sides of the battery monomer assembly 20 along the third direction Z.

[0217] In the above technical solution, by arranging the heat exchange assembly 50 on at least one side of the battery monomer assembly 20 along the third direction Z, the overall layout of the heat exchange assembly 50 and the battery monomer assembly 20 can be compact.

[0218] In some embodiments, the total projection area of all heat exchange units 5 of the heat exchange assembly 50 along the third direction Z is a first projection area, the total projection area of all battery monomers 301 of the battery device 100 along the third direction Z is a second projection area, and the ratio of the first projection area to the second projection area is greater than 1 / 3.

[0219] For example, the ratio of the first projection area to the second projection area is 2 / 5, 1 / 2, 3 / 5, 2 / 3, 4 / 5, etc.

[0220] In the technical solution described above, by making the ratio of the total sum of the projection areas of all heat exchange units 5 along the third direction Z to the total sum of the projection areas of all battery monomers 301 along the third direction Z greater than 1 / 3, the heat conduction area between the heat exchange unit 5 and the battery monomer assembly 20 can be made larger, so that the heat exchange efficiency of the heat exchange assembly 50 for the battery monomer assembly 20 is higher.

[0221] In some embodiments, with reference to Figures 3-6 and Figures 3-5 , Figure 7 is a sectional view along the line G-G in Figure 8 . Figure 7 is Figure 6 is an enlarged view of H in The heat exchange flow channel 51a is provided with one or more flow distribution ribs 5b arranged along the width direction of the heat exchange flow channel part 5a, and the flow distribution rib 5b extends along the extension direction of the heat exchange flow channel part 5a.

[0222] Among them, the flow distribution rib 5b can be integrally formed with the heat exchange flow channel part 5a.

[0223] In the technical solution described above, by arranging the flow distribution rib 5b extending along the extension direction of the heat exchange flow channel part 5a in the heat exchange flow channel 51a, the flow area of the heat exchange flow channel 51a can be divided, a smaller flow area is realized, which is beneficial to improve the heat exchange effect of the heat exchange flow channel part 5a and the battery monomer assembly 20; and the structural strength of the heat exchange flow channel part 5a can be improved.

[0224] In some embodiments, with reference to Figure 8 and Figure 7 , the flow distribution rib 5b divides the heat exchange flow channel 51a into a plurality of sub-flow channels 511a arranged side by side and isolated from each other, and the plurality of sub-flow channels 511a are arranged along the width direction of the heat exchange flow channel part 5a.

[0225] In the technical solution described above, by arranging the flow distribution rib 5b in the heat exchange flow channel 51a to divide the heat exchange flow channel 51a into a plurality of sub-flow channels 511a arranged side by side and isolated from each other, the heat exchange medium in the heat exchange flow channel 51a can flow along a plurality of sub-flow channels 511a with smaller flow areas, which can further improve the heat exchange effect of the heat exchange flow channel part 5a and the battery monomer assembly 20; and the structural strength of the heat exchange flow channel part 5a can be further improved.

[0226] In some embodiments, with reference to Figure 7 , the heat exchange flow channel part 5a is formed as a heat exchange flat tube, and the ratio of the thickness dimension e1 of the flow distribution rib 5b in the width direction of the heat exchange flow channel part 5a to the wall thickness e2 of the heat exchange flat tube is 0.7-1.2.

[0227] For example, the ratio of the thickness dimension of the flow distribution rib 5b in the width direction of the heat exchange runner portion 5a to the wall thickness of the heat exchange flat tube is 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, or the like.

[0228] In the above technical solution, by arranging the heat exchange runner portion 5a as a heat exchange flat tube, the heat conduction area of the heat exchange runner portion 5a and the battery monomer assembly 20 can be increased, and the heat exchange efficiency of the heat exchange unit 5 on the battery monomer assembly 20 can be improved; and by arranging the ratio of the thickness dimension of the flow distribution rib 5b in the width direction of the heat exchange runner portion 5a to the wall thickness of the heat exchange flat tube to be 0.7-1.2, the flow distribution rib 5b can have high structural strength, and the flow distribution rib 5b can also occupy less space in the heat exchange runner 51a.

[0229] In some embodiments, referring to Figure 8 , the heat exchange unit 5 is multiple, and the multiple heat exchange units 5 are arranged in parallel.

[0230] For example, the heat exchange assembly 50 includes an inlet and outlet structure 60, the inlet and outlet structure 60 has an inlet port 61 and an outlet port 62, each heat exchange unit 5 is connected with the inlet and outlet structure 60, the inlet and outlet structure 60 has an inlet cavity and an outlet cavity 63 which are separated from each other, the inlet port 61 is communicated with the inlet cavity, the outlet port 62 is communicated with the outlet cavity 63, one end of each heat exchange unit 5 is communicated with the inlet cavity, and the other end of each heat exchange unit 5 is communicated with the outlet cavity 63. The heat exchange medium flows into the inlet cavity from the inlet port 61 of the inlet and outlet structure 60, and then flows into the heat exchange runner 51a of the multiple heat exchange units 5 respectively and flows along the heat exchange runner 51a of the multiple heat exchange units 5 respectively, and after the heat exchange medium flows through the multiple heat exchange units 5 respectively, the heat exchange medium converges into the outlet cavity 63 of the inlet and outlet structure 60, and then flows out from the outlet port 62.

[0231] In the above technical solution, by arranging the heat exchange unit 5 as multiple units arranged in parallel, the temperature of the heat exchange medium flowing in the heat exchange runner portion 5a in each heat exchange unit 5 can be consistent, and the heat exchange effect of each heat exchange unit 5 can be strong.

[0232] In some embodiments, referring to Figure 7 , the heat exchange assembly 50 includes an inlet and outlet structure 60, the inlet and outlet structure 60 has an inlet port 61 and an outlet port 62, each heat exchange unit 5 is connected with the inlet and outlet structure 60, the heat exchange assembly 50 has a first end and a second end which are arranged opposite along a first direction X, and the inlet and outlet structure 60 is located at the first end.

[0233] For example, the liquid inlet and outlet structure 60 includes two headers 6, which can be arranged along the second direction Y, one of which has a liquid inlet cavity and a liquid inlet port 61 communicating with the liquid inlet cavity, and the other of which has a liquid outlet cavity 63 and a liquid outlet port 62 communicating with the liquid outlet cavity 63. The two ends of each heat exchange unit 5 are connected to the two headers 6, respectively.

[0234] In the above technical solution, by arranging the liquid inlet and outlet structure 60 of the heat exchange assembly 50 at one end of the heat exchange assembly 50 along the first direction X, the liquid inlet and outlet structure 60 on the heat exchange assembly 50 is facilitated to be connected to external related components.

[0235] In some embodiments, the ratio of the extension lengths of the heat exchange flow passage portions 5a of any two heat exchange units 5 is 0.8-1.2.

[0236] For example, the ratio of the extension lengths of the heat exchange flow passage portions 5a of any two heat exchange units 5 is 0.8, 0.9, 1, 1.1, 1.2, etc.

[0237] In the above technical solution, by making the extension lengths of the heat exchange flow passage portions 5a of the plurality of heat exchange units 5 close to each other, the heat exchange capacity of each heat exchange unit 5 can be made equivalent, the heat exchange is more uniform, and the overall heat exchange capacity of the heat exchange assembly 50 can be made stronger.

[0238] In some embodiments, referring to Figures 3-6 , the heat exchange assembly 50 is arranged in the box body 10.

[0239] In the above technical solution, by arranging the heat exchange assembly 50 in the box body 10, the heat exchange assembly 50 can be brought into better thermal contact with the battery monomer assembly 20, the thermal resistance between the heat exchange assembly 50 and the battery monomer assembly 20 is reduced, and the heat exchange efficiency is improved.

[0240] In some embodiments, referring to Figures 3-6 , the inner wall of the box body 10 is formed with a receiving groove 112, the shape of the receiving groove 112 is adapted to the shape of the heat exchange unit 5, and the heat exchange unit 5 is arranged in the receiving groove 112.

[0241] The shape of the receiving groove 112 is adapted to the shape of the heat exchange unit 5, including that the extension trajectory of the receiving groove 112 is consistent with the extension trajectory of the heat exchange unit 5.

[0242] In the above technical solution, by providing the receiving groove 112 for arranging the heat exchange unit 5 on the inner wall of the box body 10, the installation and positioning of the unit are facilitated.

[0243] In some embodiments, referring to Figures 1-4 , the inner wall of the box body 10 is formed with a plurality of ribs 111, and the plurality of ribs 111 cooperatively define the receiving groove 112.

[0244] In the technical solution, the plurality of ribs 111 are formed on the inner wall of the box 10, and the accommodation grooves 112 are defined by the plurality of ribs 111, so that the forming process of the accommodation grooves 112 is convenient, and the plurality of ribs 111 can improve the structural strength of the box 10.

[0245] In some embodiments, referring to Figures 2-3 , the part of the box 10 protrudes inward to form the plurality of ribs 111.

[0246] In the technical solution, the part of the box 10 protrudes inward to form the plurality of ribs 111, which facilitates the processing and forming of the ribs 111, and improves the structural strength of the box 10 without increasing the weight of the box 10.

[0247] In some embodiments, referring to Figures 2-3 , the box 10 includes a bottom plate 11, and the heat exchange assembly 50 is installed on the bottom plate 11.

[0248] For example, the heat exchange assembly 50 is installed on the upper side of the bottom plate 11.

[0249] In the technical solution, the bottom plate 11 of the box 10 is located below the battery monomer assembly 20 to support the battery monomer assembly 20.

[0250] In the technical solution, the heat exchange assembly 50 is arranged on the bottom plate 11 of the box 10, so that the heat exchange assembly 50 is located at a lower position in the box 10, facilitating the installation and fixation of the heat exchange assembly 50, and the center of gravity of the battery device 100 is lower, which is more stable and reliable.

[0251] In some embodiments, referring to Figures 2-3 , the bottom plate 11 is provided with a mounting beam 12, the mounting beam 12 is arranged on the opposite sides of the heat exchange assembly 50 along the second direction Y, the mounting beam 12 extends along the first direction X, the battery monomer assembly 20 is connected with the mounting beam 12, and the second direction Y intersects the first direction X.

[0252] In the technical solution, the mounting beam 12 is arranged on the bottom plate 11, which facilitates the installation and fixation of the battery monomer assembly 20 on the bottom plate 11.

[0253] In some embodiments, the ratio of the size of the box 10 in the first direction X to the size of the box 10 in the second direction Y is greater than 2, and the second direction Y intersects the first direction X.

[0254] For example, the ratio of the size of the box 10 in the first direction X to the size of the box 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.

[0255] In the technical solution described above, by making the size of the box 10 of the battery device 100 in the first direction X significantly larger than the size of the box 10 in the second direction Y, the battery device 100 as a whole can be substantially rectangular, and when the battery device 100 is applied to a vehicle, the first direction X of the box 10 can be placed along the longitudinal direction of the vehicle, the longitudinal space of the vehicle can be fully utilized, and the capacity of the battery device 100 can be improved.

[0256] In some embodiments, the ratio of the size of the box 10 in the third direction Z to the size of the box 10 in the second direction Y is less than 0.3, and the third direction Z intersects the second direction Y.

[0257] In the technical solution described above, by making the size of the box 10 in the up-down direction small, the battery device 100 as a whole can be flat, and when the battery device 100 is used in a vehicle, the battery device 100 can reduce the occupation of the Z-direction space of the vehicle, and facilitate the layout of other components in the vehicle; and when the battery device 100 is installed at the bottom of the vehicle, the bottom height position of the battery device 100 will not be too low to cause easy scratch damage, and the risk of scratch damage of the battery device 100 during vehicle driving can be reduced.

[0258] Referring to Figures 2-3 The application provides a power utilization device 1000 comprising the battery device 100 described above.

[0259] In the technical solution described above, by providing the battery device 100 described above, the temperature regulation efficiency of the heat exchange assembly 50 of the battery device 100 on the battery monomer assembly 20 is high, and in the process of machining and bending, the heat exchange flow channel part 5a of the heat exchange unit 5 is conveniently bent and formed.

[0260] In some embodiments, the power utilization 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 X.

[0261] 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 transverse direction of the vehicle is perpendicular to the longitudinal direction of the vehicle and perpendicular to the up-down direction, the up-down direction can refer to the Z-direction in the drawings, the longitudinal direction of the vehicle is the first direction X, and the transverse direction of the vehicle is the second direction Y.

[0262] In the above technical solution, when the battery device 100 is used for a vehicle and the longitudinal direction of the vehicle is the first direction X, the heat exchange assembly 50 of the battery device 100 has a high temperature regulation efficiency on the battery monomer assembly 20, which can improve the safety during vehicle 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 improve the capacity of the battery device 100.

[0263] The battery device 100 according to some embodiments of the present application will be described below, in which the third direction Z is the up-down direction. Figures 2-3

[0264] Referring to Figure 9 Figures 1-8 Figures 1-8 In this embodiment, the battery device 100 includes a box body 10, a plurality of battery monomer assemblies 20 and a heat exchange assembly 50, the plurality of battery monomer assemblies 20 are accommodated in the box body 10 and arranged along the first direction X. Each battery monomer assembly 20 includes two rows of battery monomer rows 30, the two rows of battery monomer rows 30 of each battery monomer assembly 20 are arranged along the first direction X, and each battery monomer row 30 includes a plurality of battery monomers 301 arranged along the second direction Y, and the thickness direction of the battery monomers 301 is consistent with the second direction Y. The heat exchange assembly 50 is arranged in the box body 10 and located at the lower side of the battery monomer assembly 20.

[0265] The box body 10 includes a bottom plate 11 and a top plate 13, the top plate 13 is arranged on the upper side of the bottom plate 11 and connected with the bottom plate 11, the top plate 13 and the bottom plate 11 are detachably connected, and the bottom plate 11 and the top plate 13 jointly define a space for accommodating the battery monomer assembly 20. The bottom plate 11 is provided with a mounting beam 12, the mounting beam 12 is arranged at the opposite sides of the battery monomer assembly 20 along the second direction Y, and the battery monomer assembly 20 is connected with the mounting beam 12.

[0266] The size of the battery monomer 301 in the up-down direction is smaller than the size of the battery monomer 301 in the first direction X, and the number of each row of battery monomer rows 30 can be 15-20. The ratio of the size of the box body 10 in the first direction X to the size of the box body 10 in the second direction Y is greater than 2, the ratio of the size of the box body 10 in the up-down direction to the size of the box body 10 in the second direction Y is less than 0.3, and the entire battery device 100 is in a rectangular flat shape.

[0267] The heat exchange assembly 50 is fixedly installed on the bottom plate 11, and the heat exchange assembly 50 is in thermal connection with the battery monomer assembly 20. The heat exchange assembly 50 includes two heat exchange units 5 and an inlet-outlet liquid structure 60, the inlet-outlet liquid structure 60 includes two flow collectors 6 arranged along the first direction X, one of the flow collectors 6 is formed with an inlet liquid cavity and an inlet liquid port 61, the other flow collector 6 is formed with an outlet liquid cavity 63 and an outlet liquid port 62, and the two ends of each heat exchange unit 5 are connected with the two flow collectors 6, respectively.​

[0268] Each heat exchange unit 5 is formed as a heat exchange flat tube, and each heat exchange unit 5 includes a heat exchange flow passage portion 5a in which a heat exchange flow passage 51a is formed. Each heat exchange unit 5 includes a plurality of straight tube sections 51 and a plurality of bent tube sections 52, and two heat exchange units 5 are a first heat exchange unit 501 and a second heat exchange unit 502. The first heat exchange unit 501 includes a first straight tube section 511, a second straight tube section 512, a first bent tube section 521, and a second bent tube section 522, and the second heat exchange unit 502 includes the first straight tube section 511, the second straight tube section 512, a third straight tube section 513, a fourth straight tube section 514, the first bent tube section 521, the second bent tube section 522, a third bent tube section 523, and a fourth bent tube section 524. All of the first straight tube sections 511 and all of the first bent tube 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 in a first direction X.

[0269] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0270] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device (100), characterized by Comprise: a box (10); a battery cell assembly (20) arranged in the box (10), the battery cell assembly (20) comprising a plurality of battery cells (301), the plurality of battery cells (301) in the battery cell assembly (20) being arranged in a second direction in a stacked manner, and satisfying: ＜ ； S is the sum of the number of the battery cells (301) of the plurality of the battery cell assemblies (20), W b is the inner width of the case (10), t is the width of each of the battery cells (301), A is the length of each of the battery cells (301), is a set gap to be satisfied in the width direction of the case (10) between the battery cell assembly (20) and the side wall of the case (10) when the second direction is the width direction of the case (10); is a set gap to be satisfied in the width direction of the case (10) between the battery cell assembly (20) and the side wall of the case (10) when the second direction is the length direction of the case (10).

2. The battery device (100) according to claim 1, characterized in that, The set gap to be satisfied in the width direction of the case (10) between the battery cell assembly (20) and the side wall of the case (10) , is satisfied: 10 mm ≤ ≤ 130 mm; The set gap to be satisfied in the width direction of the case (10) between the battery cell assembly (20) and the side wall of the case (10) , is satisfied: 10 mm ≤ ≤ 130 mm.

3. The battery device (100) according to claim 1, characterized in that greater than .

4. The battery device (100) according to claim 1, characterized in that the box (10) comprises a top plate (13) and a bottom plate (11) spaced apart in a height direction of the box (10), the battery cell (301) is provided with a pole column on a side facing the top plate (13), and in the height direction of the box (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 pole column 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 claim 1, characterized in that Further comprising a heat exchange assembly (50) for heat exchange with the battery cell (301), the heat exchange assembly (50) comprising a first heat exchange part and a second heat exchange part, the first heat exchange part being bent and extending to define a U-shaped region, and the second heat exchange part being arranged in the U-shaped region and bently connected to one end of the first heat exchange part.

6. The battery device (100) according to any one of claims 1-5, characterized in that, Further comprising a heat exchange assembly (50) for heat exchange with the battery cell assembly (20), the heat exchange assembly (50) being arranged on at least one side of the battery cell assembly (20) in the height direction (Z) of the box (10), the heat exchange assembly (50) comprising at least one heat exchange unit (5), the heat exchange unit (5) having a heat exchange flow passage part (5a) with a heat exchange flow passage (51a) for conducting a heat exchange medium, the heat exchange flow passage part (5a) comprising a straight pipe section (51) extending in a straight line and a bent pipe section (52) extending in an arc, the bent pipe section (52) connecting two adjacent straight pipe sections (51) in the extension direction of the heat exchange unit (5), and the ratio of the bending radius R of the bent pipe section (52) to the width W of the heat exchange flow passage part (5a) being k, k being greater than 0.

5.

7. The battery device (100) according to claim 6, characterized in that The value range of k is 1.0-1.

5.

8. The battery device (100) according to claim 6, characterized in that The plurality of straight pipe sections (51) in a single heat exchange flow channel part (5a) includes a plurality of first straight pipe sections (511) arranged in a first direction in sequence, each of the first straight pipe sections (511) extending in a second direction, the plurality of elbow pipe sections (52) in a single heat exchange flow channel part (5a) includes a first elbow pipe section (521) connected between the same end of two adjacent first straight pipe sections (511) in the second direction, the first straight pipe sections (511) and the first elbow pipe section (521) are both in the projection of the battery monomer assembly (20) in the third direction, and the third direction, the second direction and the first direction intersect with each other.

9. The battery device (100) according to claim 8, characterized in that 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, characterized in that The distance d1 between two adjacent first straight pipe sections (511) in the same heat exchange unit (5) 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, characterized in that The ratio of the distance d1 between two adjacent first straight pipe sections (511) in the same heat exchange flow channel part (5a) in the first direction to the width W of the first straight pipe section (511) is less than 2.

12. The battery device (100) according to claim 8, characterized in that The ratio of the extension length of the first straight pipe section (511) to the extension length of the first elbow pipe section (521) is 0.7-2.

13. The battery device (100) according to claim 8, characterized in that The first straight pipe section (511) and the first elbow pipe section (521) in a single heat exchange flow channel part (5a) constitute a bending body (53), and the heat exchange unit (5) is a plurality of heat exchange units (5), and the bending bodies (53) of the plurality of heat exchange units (5) are arranged in sequence in the first direction.

14. The battery device (100) according to claim 13, characterized in that The distance d1 between two adjacent first straight pipe sections (511) in the same heat exchange flow channel part (5a) in the first direction, and the distance d2 between two adjacent first straight pipe sections (511) in the same heat exchange flow channel part (5a) in the first direction is less than d1.

15. The battery device (100) according to claim 8, characterized in that The first straight pipe section (511) and the first elbow pipe section (521) in a single heat exchange flow channel part (5a) constitute a bending body (53), and the plurality of straight pipe sections (51) in a single heat exchange flow channel part (5a) includes a second straight pipe section (512), the second straight pipe section (512) in the same heat exchange flow channel part (5a) is located on at least one side of the bending body (53) in the second direction, and the second straight pipe section (512) extends in the first direction and is connected with the first straight pipe section (511) in the same heat exchange flow channel part (5a).

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

17. The battery device (100) according to claim 15, characterized in that The first straight pipe section (511) and the first elbow pipe section (521) in the single heat exchange channel part (5a) constitute a bending body (53), the heat exchange unit (5) is two, the bending bodies (53) of the two heat exchange units (5) are arranged along the first direction, and the two heat exchange units (5) are respectively a first heat exchange unit (501) and a second heat exchange unit (502); The first heat exchange unit (501) includes one second straight pipe section (512), the second straight pipe section (512) of the first heat exchange unit (501) is located on one side of the bending body (53) of the first heat exchange unit (501) along the second direction, the second heat exchange unit (502) includes two second straight pipe sections (512), the two second straight pipe sections (512) of the second heat exchange unit (502) are located on both sides of the bending body (53) of the second heat exchange unit (502) along the second direction, the bending body (53) has opposite first and second sides in the second direction, the second straight pipe section (512) of the first heat exchange unit (501) and one of the second straight pipe sections (512) in the second heat exchange unit (502) are both located on the first side and arranged along the first direction, and the other second straight pipe section (512) in the second heat exchange unit (502) is located on the second side and extends to one side of the bending body (53) of the first heat exchange unit (501) along the second direction.

18. The battery device (100) according to claim 17, characterized in that The minimum distance d3 in the second direction between the first elbow pipe section (521) and the second straight pipe section (512) in the same heat exchange channel part (5a), the minimum distance d4 in the second direction between the second straight pipe section (512) located on the second side in the second heat exchange unit (502) and the first elbow pipe section (521) in the first heat exchange unit (501), and d4 is less than d3.

19. The battery device (100) according to claim 8, characterized in that The battery monomer assembly (20) includes one or more battery monomer rows (30) arranged along the first direction, and each battery monomer row (30) includes a plurality of battery monomers (301) arranged along the second direction.

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

21. The battery device (100) according to claim 6, characterized in that The width W of the heat exchange flow channel part (5a) is greater than the thickness t of the battery monomer (301).

22. The battery device (100) according to claim 21, characterized in that The ratio of the width W of the heat exchange flow channel part (5a) to the thickness t of the battery monomer (301) is less than 2.

23. The battery device (100) according to claim 6, characterized in that The heat exchange flow channel part (5a) is formed as a heat exchange flat tube, the thickness direction of the heat exchange flow channel part (5a) is consistent with the third direction, and at least one side surface of the heat exchange flow channel part (5a) in the thickness direction is in heat conduction contact or heat conduction connection with the battery monomer assembly (20).

24. The battery device (100) according to claim 6, characterized in that The surface of the heat exchange flow channel part (5a) in heat conduction contact or heat conduction connection with the battery monomer assembly (20) is a heat exchange surface (54), and the heat exchange surface (54) is a plane.

25. The battery device (100) according to claim 6, characterized in that The total sum of the projection areas of all the heat exchange units (5) along the third direction is a first projection area, the total sum of the projection areas of all the battery monomers (301) along the third direction is a second projection area, and the ratio of the first projection area to the second projection area is greater than 1 / 3.

26. The battery device (100) according to claim 6, characterized in that The inner wall of the box body (10) is formed with a containing groove (112), the shape of the containing groove (112) is matched with the shape of the heat exchange unit (5), and the heat exchange unit (5) is arranged in the containing groove (112).

27. The battery device (100) according to claim 26, characterized in that The inner wall of the box body (10) is formed with a plurality of ribs (111), and the plurality of ribs (111) cooperatively define the containing groove (112).

28. The battery device (100) according to claim 27, characterized in that Part of the box body (10) protrudes inward to form a plurality of ribs (111).

29. The battery device (100) according to claim 6, characterized in that The box body (10) comprises a bottom plate (11), and the heat exchange assembly (50) is mounted on the bottom plate (11).

30. The battery device (100) according to claim 1, characterized in that The ratio of the size of the box body (10) in the length direction to the size of the box body (10) in the width direction is greater than 2.

31. The battery device (100) according to claim 1, characterized in that The ratio of the dimension of the box (10) in the height direction of the box (10) to the dimension of the box (10) in the width direction of the box (10) is less than 0.

3.

32. An electrically powered device (1000), characterized in that The battery device (100) according to any one of claims 1 to 31.

33. The power consuming device (1000) according to claim 32, characterized by The power consuming device (1000) is a vehicle, and the longitudinal direction of the vehicle and the length direction of the box (10) are both first directions.

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