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, a battery module and a battery module, the battery monomer assembly is arranged in the box body and comprises a plurality of battery monomers which are arranged in a laminated manner; the stacking direction of the first surfaces of the plurality of battery monomers in the battery monomer assembly is the first direction, the first direction is the width direction of the box body, and the first surface is the surface with the largest area in the side surfaces of the battery monomers; the heat exchange assembly comprises at least two heat exchange pipes which are bent and extend, and the heat exchange pipes define a heat exchange flow channel used for conducting a heat exchange medium. According to the technical scheme, the width size of the box body can be matched by adjusting the number of the battery monomers in the battery monomer assembly, the space utilization rate of the box body in the width direction is improved, the energy density of the battery device is improved, the bending position and the arrangement density of the bent and extended heat exchange tubes can be adjusted according to the arrangement mode of the battery monomer assembly, and the heat exchange efficiency is improved. Therefore, the heat exchange efficiency of the battery monomer assembly is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially is related to a battery device and electric device. BACKGROUND

[0002] In prior art, the box of battery device provides installation space for battery monomer, is used to contain and protect battery monomer, however, because the size design freedom degree of box is not high, internal space cannot be fully utilized, influence battery device energy density promotion. SUMMARY

[0003] The utility model aims at at least one of the prior art existing technical problems is solved.For this purpose, the utility model provides a kind of battery device, and the electric device comprising this battery device, battery device can improve the space utilization of box, improve the energy density of battery device, also can better match the installation space needs of different electric device.

[0004] Firstly, the embodiment of the utility model provides a kind of battery device, comprising: box;Battery monomer assembly, battery monomer assembly is located in box, battery monomer assembly includes the multiple battery monomers of layering arrangement, multiple battery monomers are electrically connected;And the layering direction of the first surface of multiple battery monomers in battery monomer assembly is first direction, first direction is the width direction of box, first surface is the surface of the largest area in the side of battery monomer;Heat exchange assembly, heat exchange assembly is used to exchange heat with battery monomer assembly, heat exchange assembly includes at least two bent extension heat exchange pipes, heat exchange pipe defines the heat exchange flow channel for the conduction of heat exchange medium.

[0005] In the above technical scheme, because the layering direction of the first surface of the largest area of multiple battery monomers in battery monomer assembly is along the width direction of box, multiple battery monomers in battery monomer assembly are arranged in layering along the width direction of box, and heat exchange assembly for exchanging heat with battery monomer assembly includes at least two bent extension heat exchange pipes, so that the number of battery monomers in battery monomer assembly can be adjusted to match the width size of box, improve the space utilization of the width direction of box, improve the energy density of battery device, also can make the design freedom degree of the width size of the box of battery device higher, can better match the installation space needs of different electric device, in addition, bent extension heat exchange pipe can adjust bending position and arrangement density according to the arrangement mode of battery monomer assembly, to effectively improve the heat exchange efficiency of battery monomer assembly, improve the temperature uniformity in battery monomer assembly.

[0006] In some embodiments, the battery cell assembly includes a plurality of columns of battery cells, the plurality of battery cells being stacked in a column along a first direction, the plurality of columns of battery cells being arranged along a second direction in the battery cell assembly; wherein the second direction is perpendicular to the first direction, and the second direction is a stacking direction of second surfaces of the plurality of battery cells, the second surface being a surface with the smallest area among the side surfaces of the battery cell; the heat exchange assembly is arranged on at least one side of the battery cell assembly in a third direction, the third direction being arranged at an angle with the first direction and the second direction.

[0007] In the above technical solution, the second surface with the smallest area of the plurality of columns of battery cells in the battery cell assembly is perpendicular to the length direction of the box, and the plurality of columns of battery cells in the battery cell assembly are sequentially stacked along the length direction of the box, so that the number of battery cells in the battery cell assembly can be adjusted to match the width dimension of the box, and the number of the plurality of columns of battery cells in the battery cell assembly can be adjusted to match the length dimension of the box, thereby improving the space utilization in the width direction and the length direction of the box and improving the energy density of the battery device. Meanwhile, the heat exchange assembly includes at least two heat exchange pipes for heat exchange with the battery cell assembly and extending in a bent manner, and the bent heat exchange pipes can adjust the bending position and arrangement density according to the arrangement form of the battery cell assembly in the width direction and the length direction of the box, thereby effectively improving the heat exchange efficiency of the battery cell assembly, reducing the probability of local temperature being too high or too low in the battery cell assembly, and improving the temperature uniformity in the battery cell assembly.

[0008] In some embodiments, at least part of the heat exchange flow channel of any heat exchange pipe forms a flow channel body, and the flow channel bodies of the at least two heat exchange pipes are arranged along the second direction.

[0009] In the above technical solution, by arranging the flow channel bodies of the plurality of heat exchange flow channels along the length direction of the box, the temperature of each battery cell assembly or each column of battery cells can be independently and accurately controlled by controlling the temperature of the heat exchange medium in each flow channel body, thereby improving the temperature uniformity between the battery cell assemblies, and the flow channel bodies can be conveniently arranged to extend reciprocally along the width direction of the box, so that the flow channel bodies contact each battery cell in the corresponding heat exchange region for heat exchange, thereby reducing the risk of local temperature being too high or too low in the battery cell that does not contact the flow channel body in the corresponding heat exchange region, and improving the temperature uniformity between the battery cells.

[0010] In some embodiments, the heat exchange flow channel includes a horizontal part and a vertical part, the vertical part extending along the second direction, and the horizontal part extending along the first direction, wherein the vertical part is closer to the edge of the box than the horizontal part.

[0011] In the technical solution, the longitudinal part is closer to the edge of the box than the transverse part, and the longitudinal part can exchange heat with the peripheral battery monomer close to the edge of the box, so that the longitudinal part can realize heat management of the peripheral battery monomer close to the edge of the box, the transverse part can exchange heat with the battery monomer close to the middle of the box, and when the heat exchange medium flows into the longitudinal part and the transverse part in sequence, the internal and external temperature difference of the peripheral battery monomer close to the edge of the box and the battery monomer close to the middle of the box caused by heat exchange with the environment can be compensated, the heat exchange effect of the peripheral battery monomer close to the edge of the box and the battery monomer close to the middle of the box tends to be consistent, the temperature uniformity of the battery device is improved, and the service life of the battery device is improved to a certain extent. In addition, the heat exchange flow channel includes the longitudinal part extending along the second direction and the transverse part extending along the first direction, which can simplify the structure of the heat exchange flow channel and facilitate the processing and arrangement of the heat exchange flow channel.

[0012] In some embodiments, the plurality of transverse parts in the flow channel body are arranged in the first direction and connected in sequence, and the longitudinal part in the flow channel body is connected to at least part of the transverse parts.

[0013] In the technical solution, the plurality of transverse parts of the flow channel body are sequentially connected along the second direction, and the longitudinal part is connected to part or all of the transverse parts, the plurality of transverse parts can increase the arrangement density of the flow channel body in the length direction of the battery device, improve the heat exchange efficiency and uniformity with the battery monomer, the longitudinal part is arranged closer to the edge and connected to the transverse part, the longitudinal part can exchange heat with the peripheral battery monomer close to the side wall of the box, increase the heat exchange area with the peripheral battery monomer, and improve the temperature uniformity of the battery device.

[0014] In some embodiments, the flow channel body includes a first heat exchange part and a second heat exchange part, the first heat exchange part is bent and extends to define a U-shaped region, and the second heat exchange part is bent and arranged in the U-shaped region, and the second heat exchange part is bent and connected to one end of the first heat exchange part.

[0015] In the technical solution, the first heat exchange part of the flow channel body is bent and extended to be U-shaped, the second heat exchange part is bent and arranged in the first heat exchange part, and the first heat exchange part is bent and connected to the second heat exchange part, which can compact the structure of the flow channel body, increase the flow channel length of the flow channel body and the heat exchange area with the battery monomer, prolong the flow time of the heat exchange medium in the flow channel body, improve the heat exchange efficiency, and improve the temperature uniformity between the battery monomers in the region where the flow channel body is located.

[0016] In some embodiments, the second heat exchange part includes a plurality of transverse parts, the plurality of transverse parts extend along the first direction and are arranged in the second direction, and the plurality of transverse parts of the second heat exchange part are sequentially connected along the second direction.

[0017] In the technical scheme, the second heat exchange part comprises multiple horizontal parts, which can increase the heat exchange area of the second heat exchange part, improve the heat exchange efficiency, make the heat of the second heat exchange part uniformly distributed, improve the temperature uniformity between the battery monomers, and sequentially bend the multiple horizontal parts to connect them, which can simplify the structure of the second heat exchange part and facilitate the molding of the second heat exchange part.

[0018] In some embodiments, the connection position of the two adjacent horizontal parts of the first heat exchange part is bent into a semicircular arc shape.

[0019] In the technical scheme, the connection position of the two horizontal parts of the second heat exchange part is bent into a semicircular arc shape, which not only allows the two horizontal parts to be arranged in parallel and spaced apart, compacting the structure of the second heat exchange part and improving the heat exchange efficiency, but also reduces the flow resistance of the heat exchange medium, reduces the pressure drop, further improves the heat exchange efficiency of the second heat exchange part, reduces the stress concentration at the bending position, and improves the service life of the heat exchange assembly.

[0020] In some embodiments, the first heat exchange part comprises two horizontal parts and a vertical part, the two horizontal parts extend in the first direction and are arranged in the second direction, and the vertical part extends in the first direction and is connected between the two horizontal parts.

[0021] In the technical scheme, since the first heat exchange part comprises two horizontal parts and a vertical part connected between the two horizontal parts, the second heat exchange part can be conveniently enclosed inside, the structure of the first heat exchange part is simplified, the first heat exchange part is facilitated to be molded, and the production efficiency is improved.

[0022] In some embodiments, the connection position of the two horizontal parts and the vertical part of the first heat exchange part is bent into a quarter circular arc shape.

[0023] In the technical scheme, the connection position of the horizontal part and the vertical part of the first heat exchange part is bent into a quarter circular arc shape, which can make the connection position of the horizontal part and the vertical part smoothly transition, reduce turbulence and vortex flow, reduce flow resistance and pressure drop, improve heat exchange efficiency, reduce stress concentration at the connection position of the horizontal part and the vertical part, improve the structural stability and durability of the connection position of the horizontal part and the vertical part, improve the service life of the heat exchange assembly, facilitate the molding of the first heat exchange part, and reduce the risk of leakage at the connection position of the horizontal part and the vertical part.

[0024] In some embodiments, the inlets and outlets of the multiple heat exchange channels are located at the same end of the battery device in the second direction.

[0025] In the technical solution, the inlets and outlets of the plurality of heat exchange channels are located at the same end of the battery device in the second direction, so that the inlets and outlets of the plurality of heat exchange channels can be arranged in a concentrated manner, thereby facilitating the connection of the plurality of heat exchange channels to external pipelines, simplifying the structure and layout of the external pipelines, reducing the installation and maintenance difficulty, and reducing the arrangement space of the inlets, outlets and external pipelines, compact structure, reducing space occupation, and improving space utilization. It can also improve the temperature uniformity between the battery monomers corresponding to each heat exchange channel, improve the temperature uniformity between the battery monomers at the edge position of the box body and the battery monomers close to the central area of the box body, reduce the probability of local temperature being too high or too low in the battery device, and improve the temperature uniformity of the battery device.

[0026] In some embodiments, the inlets of the plurality of heat exchange channels are in communication, and the outlets of the plurality of heat exchange channels are in communication.

[0027] In the technical solution, the inlets of the plurality of heat exchange channels are in communication, and the outlets are also in communication, which not only can realize the uniform distribution of the heat exchange medium in the plurality of heat exchange channels, improve the temperature uniformity of the battery device, but also can reduce the flow resistance, improve the heat exchange efficiency, and reduce the risk of thermal runaway of the battery device.

[0028] In some embodiments, the plurality of heat exchange channels includes a first heat exchange channel and a second heat exchange channel, and the flow channel body of the first heat exchange channel is closest to the inlet and the outlet, wherein the second heat exchange channel further includes a first connecting portion and a second connecting portion, the first connecting portion, the flow channel body and the second connecting portion are connected in sequence, the first connecting portion is formed at one end away from the flow channel body The inlet is formed at one end of the second connecting portion away from the flow channel body; wherein the first connecting portion and the second connecting portion extend along the second direction.

[0029] In the technical solution, the second heat exchange channel includes a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are connected at both ends of the flow channel body of the second heat exchange channel, and one end of the first connecting portion and the second connecting portion away from the flow channel body is formed as the inlet and the outlet of the second heat exchange channel. Therefore, the first connecting portion and the second connecting portion can reduce the temperature difference between the battery monomers close to the edge of the box body and the first connecting portion and the second connecting portion and the battery monomers close to the central area of the box body, and can also reduce the probability of local temperature being too high or local temperature being too low in the battery device, and improve the temperature uniformity between the battery monomers.

[0030] In some embodiments, the first connecting portion is closer to the edge of the box body in the first direction than the second connecting portion.

[0031] In the technical solution, the first connecting part is arranged closer to the edge of the box body than the second connecting part in the first direction, and one end of the first connecting part is formed as an inlet, so that the first connecting part can exchange heat with the battery monomer closer to the edge of the box body than the second connecting part, and the heat exchange medium entering the first connecting part from the inlet can compensate for the heat loss of the battery monomer closer to the edge of the box body in heat exchange with the environment, thereby improving the temperature uniformity among the battery monomers.

[0032] In some embodiments, the first connecting part and the second connecting part are arranged on the same side of the first heat exchange flow channel in the first direction.

[0033] In the technical solution, the first connecting part and the second connecting part are arranged on the same side of the first heat exchange flow channel in the first direction, which can facilitate the bending forming of the second heat exchange flow channel, further simplify the arrangement mode of the plurality of heat exchange flow channels, compact structure, improve the space utilization rate in the box body, and reduce the probability of local high temperature or local low temperature in the battery device, thereby improving the temperature uniformity among the battery monomers.

[0034] In some embodiments, the connection position of the first connecting part and the flow channel body is bent into a quarter circular arc shape; and / or, the connection position of the second connecting part and the flow channel body is bent into a quarter circular arc shape.

[0035] In the technical solution, the connection position of the first connecting part and the second connecting part and the flow channel body is bent into a quarter circular arc shape, which can make the connection position of the first connecting part and the second connecting part and the flow channel body smoothly transition, reduce turbulence and vortex, reduce flow resistance, reduce pressure drop, improve heat exchange efficiency, reduce stress concentration at the connection position of the first connecting part and the second connecting part and the flow channel body, improve the structural stability and durability of the connection position of the first connecting part and the second connecting part and the flow channel body, and improve the service life of the heat exchange assembly. In addition, it is also convenient for the processing and forming of the second heat exchange flow channel, and reduces the leakage risk of the connection position of the first connecting part and the second connecting part and the flow channel body.

[0036] In some embodiments, each heat exchange flow channel has an inlet and an outlet, and each heat exchange flow channel extends from the inlet to the outlet, wherein the ratio of the extension lengths of any two heat exchange flow channels is 0.8-1.2.

[0037] In the technical solution, the ratio of the extension lengths of any two heat exchange flow channels is set to 0.8-1.2, which can make the extension lengths of any two heat exchange flow channels relatively close, so that the flow distances of the heat exchange medium in each heat exchange flow channel are relatively uniform, and the flow resistances in each heat exchange flow channel are close, thereby making the heat exchange efficiency of each heat exchange flow channel uniform, and further improving the temperature uniformity among the battery monomers corresponding to each heat exchange flow channel.

[0038] In some embodiments, the number of heat exchange channels is two, and the two heat exchange channels are a first heat exchange channel and a second heat exchange channel, respectively. The inlets and outlets of the two heat exchange channels are located at the same end of the battery device in the second direction. The channel body of the first heat exchange channel is arranged close to the inlet and the outlet. The ratio of the extension length of the second heat exchange channel to the extension length of the first heat exchange channel is greater than or equal to 1 and less than or equal to 1.2.

[0039] In the above technical solution, the ratio of the extension length of the second heat exchange channel to the extension length of the first heat exchange channel is greater than or equal to 1 and less than or equal to 1.2, which can make the flow resistance and pressure drop of the heat exchange medium in the first heat exchange channel and the second heat exchange channel relatively uniform, and improve the temperature uniformity between the battery monomers.

[0040] In some embodiments, the width of the heat exchange channel is a first width, the size of the battery monomer in the second direction is a second width, and the ratio of the first width to the second width is greater than or equal to one-third.

[0041] In the above technical solution, since the ratio of the first width of the heat exchange channel to the second width of the battery monomer is greater than or equal to one-third, not only can the width of the heat exchange channel be increased, the flow area of the heat exchange channel can be increased, the pressure drop of the heat exchange channel can be reduced, and the heat exchange efficiency can be improved, but also the heat exchange area of the heat exchange channel and the battery monomer can be increased, the heating rate of the heat exchange assembly to the battery monomer can be improved, and the temperature rising speed of the battery monomer can be improved.

[0042] In some embodiments, the battery monomer has a first wall surface cooperating with the heat exchange pipe for heat exchange. The first wall surface is a projection surface. The area of the orthographic projection of the heat exchange pipe on the first wall surface is greater than or equal to one-third of the area of the first wall surface.

[0043] In the above technical solution, since the heat exchange contact area between the heat exchange pipe and the battery monomer is greater than or equal to one-third of the area of the first wall surface, when the heat exchange pipe cools or heats the battery monomer, the heat exchange contact area between the heat exchange pipe and each battery monomer can be increased, and the heat exchange rate of the battery monomer can be improved. In this way, not only can the battery monomer quickly reach the preset temperature range when the battery device starts to work, but also the battery monomer can be kept in a suitable temperature range during the normal working process of the battery device, the temperature fluctuation of the battery monomer during the working process can be reduced, the battery monomer can operate more stably, and the battery device can maintain good performance.

[0044] In some embodiments, the box body includes a bottom plate and an upper cover. The upper cover is arranged on the upper side of the bottom plate and cooperates with the bottom plate to define a containing cavity. The battery monomer is arranged in the containing cavity.

[0045] In the technical scheme, the box body comprises the upper cover and the bottom plate, the upper cover and the bottom plate cooperatively define the accommodating cavity, the upper cover and the bottom plate can encapsulate and protect the battery monomer, in addition, the box body is divided into the upper cover and the bottom plate, so that the structure of the box body is simplified, the processing and molding of the box body are facilitated, and the installation of the parts inside the battery device is facilitated.

[0046] In some embodiments, the box body further comprises: mounting beams arranged in the accommodating cavity, the mounting beams extend along the second direction and are arranged on both sides of the bottom plate in the first direction, and the battery monomer assembly is arranged between the two mounting beams.

[0047] In the technical scheme, the battery monomer assembly is arranged between the two mounting beams, the mounting beams can not only improve the structural strength of the bottom plate and the structural strength of the box body, but also fix the battery monomer assembly with the mounting beams, improve the reliability of the battery monomer assembly fixed in the box body, in addition, the mounting beams can limit the displacement of the battery monomer assembly in the first direction and limit the expansion of the plurality of battery monomers in the battery monomer assembly in the first direction, and the stability of the operation of the battery device is improved.

[0048] In some embodiments, the heat exchange assembly is arranged in the box body.

[0049] In the technical scheme, the heat exchange assembly is arranged in the box body, so that the heat exchange assembly can be directly attached to the battery monomer for heat exchange, heat loss is reduced, and heat exchange efficiency is improved. In addition, the box body can protect the heat exchange assembly, thereby prolonging the service life of the heat exchange assembly.

[0050] In some embodiments, the bottom plate of the box body is formed with a plurality of convex ribs, the plurality of convex ribs cooperatively define a bent and extended accommodating groove, and the heat exchange pipe is arranged in the accommodating groove.

[0051] In the technical scheme, the heat exchange pipe of the heat exchange assembly is arranged in the accommodating groove defined by the plurality of convex ribs on the bottom plate, the convex ribs can not only improve the structural strength of the bottom plate and enhance the support stability of the bottom plate on the battery monomer assembly, but also reduce the pressure of the battery monomer assembly on the heat exchange pipe, and the service life of the heat exchange assembly is improved.

[0052] In a second aspect, the embodiments of the utility model provide a kind of electric device, comprising the battery device according to the first aspect of the utility model.

[0053] In the above embodiment, by arranging the battery device of the first aspect, and because the stacking direction of the largest first surface of the plurality of battery cells in the battery cell assembly is along the width direction of the box body, the plurality of battery cells in the battery cell assembly are arranged in a stacked manner along the width direction of the box body, so that the number of battery cells in the battery cell assembly can be adjusted to match the width size of the box body, improve the space utilization in the width direction of the box body, improve the energy density of the battery device, and in addition, the design freedom of the width size of the box body of the battery device is higher, and the installation space requirements of different power consumption devices can be better matched.

[0054] Additional aspects and advantages of the present application will be given in part in the following description, and become apparent from the description, or be learned by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 is a structural schematic diagram of a vehicle according to an embodiment of the present application;

[0056] Figure 2 is a structural schematic diagram of a battery device according to an embodiment of the present application;

[0057] Figure 3 is an explosion diagram of a battery device according to an embodiment of the present application, only the upper cover is blown off;

[0058] Figure 4 is an explosion diagram of a battery device according to an embodiment of the present application;

[0059] Figure 5 is a schematic diagram of a plurality of battery cell assemblies and heat exchange assemblies of a battery device according to an embodiment of the present application;

[0060] Figure 6 is Figure 5 is a partial enlarged view of the battery cell assembly and the heat exchange assembly shown in FIG.

[0061] Figure 7 is an explosion diagram of a battery device according to an embodiment of the present application from another angle.

[0062] REFERENCE NUMERALS:

[0063] 1, a power consumption device;

[0064] 1000, a battery device; 2000, a controller; 3000, a motor;

[0065] 100, a box body;

[0066] 110, a bottom plate; 111, a protruding rib; 112, a containing groove; 113, a mounting plate;

[0067] 120, upper cover; 130, mounting beam; 140, sealing member;

[0068] 200, battery cell assembly; 210, battery cell;

[0069] 300, heat exchange assembly;

[0070] 30, heat exchange pipe;

[0071] 31, heat exchange runner; 31a, first heat exchange runner; 31b, second heat exchange runner;

[0072] 3101, horizontal part; 3102, vertical part; 3103, inlet; 3104, outlet;

[0073] 311, runner main body; 3111, first heat exchange part; 3112, second heat exchange part;

[0074] 312, first connecting part; 313, second connecting part;

[0075] 321, first sleeve; 322, second sleeve; 331, liquid inlet pipe; 332, liquid outlet pipe;

[0076] Y, first direction; X, second direction; Z, third direction. DETAILED DESCRIPTION

[0077] The embodiments of the technical scheme of the utility model will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, therefore only as an example, and cannot limit the protection scope of the utility model.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the utility model; the terms "include" and "have" and any variations thereof in the specification and claims of the utility model and the above description of drawings are intended to cover not exclusive inclusion.

[0079] In the description of the embodiments of the utility model, the technical terms "first", "second" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0080] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily referring to the same embodiment nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood that embodiments described herein can be combined with each other, unless otherwise explicitly stated.

[0081] In the description of the embodiments of the application, the term "and / or" is only a description of the associated relationship of associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0082] In the description of the embodiments of the application, the term "a plurality of" refers to two or more (including two).

[0083] In the description of the embodiments of the application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0084] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0085] The battery apparatus (Battery Apparatus) mentioned in the embodiments of the application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) can include one or more battery cells, and when there are multiple, the multiple battery cells are connected in series, parallel or mixed connection through the busbar component.

[0086] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells by a cable tie.

[0087] In some embodiments, the battery device can be a battery pack, which includes a box and one or more battery cell assemblies, the battery cell assemblies are accommodated in the box.

[0088] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box.

[0089] As an example, the battery cell assembly can also be accommodated in the box by fixing a plurality of battery cells directly in the box.

[0090] As an example, 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 cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0091] As an 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 cell assembly.

[0092] As an example, the box can be part of the chassis structure of the vehicle. For example, the top cover of the box can be at least part of the floor of the vehicle, or the frame of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0093] In some embodiments, the battery device refers to an energy storage device, which includes a box, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0094] The battery cell mentioned in the embodiments of the utility model can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery or a magnesium ion battery, etc. The embodiments of the utility model are not limited to this. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The embodiments of the utility model are not limited to this. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell, and the embodiments of the utility model are not limited to this.

[0095] Exemplarily, the battery cell can generally include a shell, an electrode assembly and an electrolyte, the shell is used to accommodate the electrode assembly and the electrolyte, and the shell is provided with at least one positive pole and at least one negative pole. The electrode assembly includes one or more electrode assemblies, and the electrode assembly is formed by stacking or winding a positive pole sheet, a negative pole sheet and a separator film.

[0096] The technical solutions described in the embodiments of the utility model are applicable to various electric devices using battery devices, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0097] In the related art, the thickness direction of the battery cell in the battery device is parallel to the length direction of the box body, and the plurality of battery cells in the battery module are arranged in a stacked manner in the length direction of the box body. At this time, the width dimension of the box body is determined according to the sum of the width dimensions of the plurality of battery modules arranged in the box body, and the width dimension of the box body is limited by the installation space of the battery device. When the width dimension of the box body does not match the width dimension of the battery module, the space in the width direction of the box body cannot be fully utilized, and the energy density of the battery device is affected.

[0098] Based on the above consideration, in order to improve the space utilization in the box body and improve the energy density of the battery device, the utility model designs a battery device, the battery cell assembly of the battery device includes a plurality of battery cells, the stacking direction of the first surface of the plurality of battery cells in the battery cell assembly is the width direction of the box body, and the first surface is the surface with the largest area among the side surfaces of the battery cell; the heat exchange assembly is arranged in the box body for heat exchange with the battery cell assembly, and the heat exchange assembly includes at least two bent and extended heat exchange pipes, and the heat exchange pipes are used to guide the heat exchange medium. Therefore, the number of battery cells in the battery cell assembly can be adjusted to match the width dimension of the box body, the space utilization in the width direction of the box body is improved, the energy density of the battery device is improved, the design freedom of the width dimension of the box body of the battery device is higher, the installation space requirements of different electric devices can be better matched, in addition, the bent and extended heat exchange pipes can adjust the bending position and arrangement density according to the arrangement mode of the battery cell assembly in the box body, thereby effectively improving the heat exchange efficiency of the battery cell assembly and improving the temperature uniformity in the battery cell assembly.

[0099] The utility model embodiment provides a kind of electric device using the battery device of the present application as power supply, and the electric device can be but not limited to mobile phone, tablet, notebook computer, electric toy, electric tool, electric car, electric car, ship, spacecraft and so on.The electric toy can include fixed or mobile electric toy, for example, game machine, electric car toy, electric ship toy and electric aircraft toy and so on, and spacecraft can include aircraft, rocket, space shuttle and spacecraft and so on.

[0100] The following embodiments are described in detail for the convenience of explanation, taking the electric device 1 as a vehicle as an example.

[0101] Please refer to Figure 1 , Figure 1 The electric device 1 provided by some embodiments of the utility model is a structural schematic diagram of vehicle. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric vehicle, a hybrid electric vehicle or a range extended vehicle. The vehicle is provided with a battery device 1000, which can be arranged at the bottom, head or tail of the vehicle. The battery device 1000 can be used for power supply of the vehicle, for example, the battery device 1000 can be used as the operating power supply of the vehicle. The vehicle can also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery device 1000 to supply power to the motor 3000, for example, to meet the working power demand of the vehicle during starting, navigation and driving. In some embodiments of the utility model, the battery device 1000 can not only be used as the operating power supply of the vehicle, but also be used as the driving power supply of the vehicle, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle.

[0102] The following refers to Figures 2-7 The battery device 1000 according to the first aspect of the utility model is described. Figure 2 is a structural schematic diagram of the battery device 1000 according to the embodiments of the utility model; Figure 3 is an exploded view of the battery device 1000 according to the embodiments of the utility model, only the upper cover 120 is opened; Figure 4 is an exploded view of the battery device 1000 according to the embodiments of the utility model; Figure 5 is a schematic view of the plurality of battery monomer assemblies 200 and heat exchange assemblies 300 of the battery device 1000 according to the embodiments of the utility model; Figure 6 is Figure 5 is a local enlarged view of the battery monomer assembly 200 and the heat exchange assembly 300 shown in FIG. Figure 7 is an exploded view of the battery device 1000 according to the embodiments of the utility model from another angle.

[0103] The utility model embodiment proposes a kind of battery device 1000, as Figures 2-7 As shown, battery device 1000 includes: box 100, battery monomer assembly 200 and heat exchange component 300, battery monomer assembly 200 is located in box 100, battery monomer assembly 200 includes the lamination of multiple battery monomers 210, multiple battery monomers 210 are electrically connected;And the lamination direction of the first surface of multiple battery monomers 210 in battery monomer assembly 200 is first direction Y, first direction Y is the width direction of box 100, and the first surface is the surface of the largest area in the side of battery monomer 210;Heat exchange component 300 is used to exchange heat with battery monomer assembly 200, and heat exchange component 300 includes at least two bent and extended heat exchange pipes 30, and the heat exchange pipe 30 defines the heat exchange flow channel 31 for conducting heat exchange medium.

[0104] As Figures 2-4 Shown, box 100 defines containing cavity, battery monomer assembly 200 is located in the containing cavity of box 100, and heat exchange component 300 can be located in the containing cavity of box 100, and also can be located in the outside of box 100.In one example, box 100 can be aluminum alloy piece, to reduce the weight of box 100 under the premise of meeting the structural strength of box 100, improve the energy density of battery device 1000.

[0105] In other examples, box 100 can also be composite material piece, and the composite material of box 100 can be selected from materials with high strength, light weight and good corrosion resistance.

[0106] Referring to Figure 2 And Figure 3 Battery monomer assembly 200 includes multiple battery monomers 210, and two, four, six, ten, twelve, eighteen, twenty-four, thirty or more battery monomers 210 can be included in battery monomer assembly 200, and it should be noted that the number of battery monomers 210 in the utility model embodiment includes but is not limited to the above-mentioned several implementation manners.Any two battery monomers 210 in multiple battery monomers 210 in battery monomer assembly 200 can be connected in series or in parallel.

[0107] As Figure 4 And Figure 5As shown, the heat exchange assembly 300 is used for heat exchange with the battery monomer 210, for example, the heat exchange assembly 300 can be directly attached to the battery monomer 210 for heat exchange, and the heat exchange assembly 300 can also be attached to the battery monomer 210 for heat exchange. The heat exchange assembly 300 can also include at least two bent and extended heat exchange pipes 30, and the heat exchange pipes 30 can define heat exchange flow channels 31 therein; wherein the heat exchange flow channels 31 are used to guide the heat exchange medium, and 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, the heat exchange medium can take away the heat generated by the battery monomer or the heat exchange medium can heat the battery monomer.

[0108] The heat exchange pipe 30 is a tubular element for realizing heat exchange, and the heat exchange medium can flow in the interior of the heat exchange pipe 30 and transfer heat of the heat exchange medium to an object (such as the battery monomer 210) that needs to be heated or cooled through the pipe wall of the heat exchange pipe 30.

[0109] In some examples, each heat exchange pipe 30 is formed by bending a single pipe, thereby reducing the number of welding points of the heat exchange pipe 30, reducing the risk of leakage of the heat exchange assembly 300, and at the same time, the operation process of bending a single pipe is simpler than the manufacturing process of a plate structure, and the heat exchange pipe requires less material than a cold plate, thereby significantly reducing the cost of the heat exchange assembly 300.

[0110] Compared with the related art, by setting a cold plate and forming a flow channel in the cold plate, the flow channel in the cold plate is narrow, the flow rate is limited and uneven, and the utility model adopts the bent and extended heat exchange pipe 30 and defines the heat exchange flow channel 31, the heat exchange medium in the heat exchange pipe 30 can realize a high flow rate, improve the turbulence degree of the heat exchange medium, thereby improving the heat exchange efficiency of the battery monomer 210, and at the same time, the flow rate of the heat exchange medium in the heat exchange pipe 30 is relatively uniform, which is conducive to uniform transmission of the temperature of the heat exchange medium, thereby improving the temperature uniformity between the battery monomers 210.

[0111] In addition, the bent and extended heat exchange pipe 30 of the utility model can set the bending position and arrangement density of the heat exchange pipe 30 according to the heat exchange demand of the battery monomer 210 at each position in the battery device 1000, thereby effectively reducing the probability of local temperature being too high and temperature being too low in the battery device 1000, and improving the temperature uniformity between the battery monomers 210.

[0112] The number of heat exchange pipes 30 of the heat exchange assembly 300 can be two, three, four, five, six, seven, eight or more. The shape of the heat exchange pipe 30 can include various shapes, for example, it can be a circular pipe or a flat pipe.

[0113] The plurality of heat exchange channels 31 are arranged in parallel with each other, that is, the inlet 3103 of each heat exchange channel 31 is connected to the liquid inlet of the heat exchange assembly 300, and the outlet 3104 of each heat exchange channel 31 is connected to the liquid outlet of the heat exchange assembly 300. In this way, the flow of the heat exchange medium in each heat exchange channel 31 can be made consistent, uniform heat exchange of the battery monomer 210 is achieved, in addition, the pressure drop in a single heat exchange channel 31 can be reduced, and the heat exchange efficiency is improved.

[0114] The first surface of the battery monomer 210 is the largest surface among the side surfaces of the battery monomer 210. Specifically, the battery monomer 210 is a cuboid shape, the length dimension of the battery monomer 210 is greater than the width dimension, and the thickness dimension, since the first surface is the largest surface among the side surfaces of the battery monomer 210, the area of the first surface = length dimension x width dimension, that is, the first surface is the surface of the battery monomer 210 parallel to the length direction and the width direction, and the first surface is also the surface of the battery monomer 210 perpendicular to the thickness direction.

[0115] Therefore, the plurality of battery monomers 210 in the battery monomer assembly 200 are arranged in a stacked manner along the thickness direction of the battery monomer 210, and when the battery monomer assembly 200 is arranged in the box 100, the stacking direction of the plurality of battery monomers 210 in the battery monomer assembly 200 is parallel to the width direction of the box 100. The plurality of battery monomers 210 in the battery monomer assembly 200 are arranged in a stacked manner along the width direction of the box 100, the number of battery monomers 210 of the battery monomer assembly 200 in the width direction of the box 100 can be designed and adjusted according to the size in the width direction of the box 100, thereby improving the space utilization in the box 100.

[0116] In addition, it should be noted that when the width dimension of the box 100 is narrowed, if the thickness direction of the battery monomer 210 is parallel to the length direction of the box 100, and the plurality of battery monomers 210 in the battery monomer assembly 200 are stacked along the length direction of the box 100, it is easy to make the size of the battery monomer assembly 200 in the width direction of the box 100 not match the width dimension of the box 100, causing one or more battery monomer assemblies 200 arranged in the width direction of the box 100 cannot fully utilize the space in the width direction of the box 100, affecting the energy density of the battery device 1000.

[0117] Specifically, when the battery monomer assembly 200 is arranged in the box body 100, and the arrangement mode of parallel to the thickness direction of the battery monomer 210 to the length direction of the box body 100 and parallel to the length direction of the battery monomer 210 to the width direction of the box body 100 is adopted in the related art, in the width direction of the box body 100, the total number of the battery monomers 210 that can be arranged in turn is: the quotient obtained by dividing the width size of the box body 100 by the length size of the battery monomer 200, and then rounding down.

[0118] When the battery monomer assembly 200 is arranged in the box body 100, and the arrangement mode of parallel to the thickness direction of the battery monomer 210 to the width direction of the box body 100 and parallel to the length direction of the battery monomer 210 to the length direction of the box body 100 is adopted in the utility model, in the width direction of the box body 100, the total number of the battery monomers 210 that can be arranged in turn is: the quotient obtained by dividing the width size of the box body 100 by the thickness size of the battery monomer 210, and then rounding down.

[0119] Since the thickness size of the battery monomer 210 is much smaller than the length size of the battery monomer 210, when the outer contour of the box body 100 is determined, the width size of the box body 100 is also determined, at this time, the arrangement scheme of the battery monomer assembly 200 of the utility model, that is, parallel to the thickness direction of the battery monomer 210 to the width direction of the box body 100, makes the battery monomer 210 stacked in the width direction of the box body 100, which can more flexibly adapt to the width size of the box body 100, fully utilize the space in the width direction of the box body 100, and improve the energy density of the battery device 1000.

[0120] Therefore, the embodiment can match the width size of the box body 100 by adjusting the number of the battery monomer assembly 200, improve the space utilization in the width direction of the box body 100, improve the energy density of the battery device 1000, and design the width size of the box body 100 of the battery device 1000 according to the actual needs of the electric device 1, so that the width size of the battery device 1000 is more adaptable to the installation size of the electric device 1.

[0121] Further, the plurality of battery monomers 210 in the battery monomer assembly 200 are stacked along the width direction of the box body 100, and the heat exchange assembly 300 for heat exchange with the battery monomer assembly 200 comprises at least two heat exchange pipes 30 extending in a bent manner, and the heat exchange flow channel 31 for conducting the heat exchange medium is defined in the heat exchange pipe 30, so that the plurality of heat exchange pipes 30 extending in a bent manner can exchange heat with the battery monomer assembly 200 in the box body 100, and the bending position and arrangement density of the heat exchange pipe 30 can be adjusted according to the heat exchange requirement of each position of the battery monomer assembly 200, so as to not only improve the heat exchange efficiency, but also reduce the probability of local temperature being too high and local temperature being too low of the battery monomer assembly 200, and improve the temperature uniformity in the battery monomer assembly 200.

[0122] In the above technical solution, the stacking direction of the first surface with the largest area of the plurality of battery monomers 210 in the battery monomer assembly 200 is along the width direction of the box body 100, the plurality of battery monomers 210 in the battery monomer assembly 200 are arranged in a stacked manner along the width direction of the box body 100, and the heat exchange assembly 300 for heat exchange with the battery monomer assembly 200 comprises at least two heat exchange pipes 30 extending in a bent manner, so that the number of battery monomers 210 in the battery monomer assembly 200 can be adjusted to match the width size of the box body 100, the space utilization rate in the width direction of the box body 100 is improved, the energy density of the battery device 1000 is improved, the design freedom of the width size of the box body 100 of the battery device 1000 is higher, the installation space requirement of different electric devices 1 can be better matched, in addition, the bending position and arrangement density of the heat exchange pipe 30 extending in a bent manner can be adjusted according to the arrangement mode of the battery monomer assembly 200 in the box body 100, so as to effectively improve the heat exchange efficiency of the battery monomer assembly 200 and improve the temperature uniformity in the battery monomer assembly 200.

[0123] In some embodiments of the utility model, as shown in Figure 4 and Figure 5 The battery monomer assembly 200 comprises a plurality of rows of battery monomers 210, the plurality of battery monomers 210 are arranged in a row in a stacked manner along the first direction Y, and the plurality of rows of battery monomers 210 are arranged in the battery monomer assembly 200 along the second direction X; wherein the second direction X is perpendicular to the first direction Y, and the second direction X is the stacking direction of the second surface of the plurality of battery monomers 210, and the second surface is the surface with the smallest area in the side surface of the battery monomer 210; the heat exchange assembly 300 is arranged on at least one side of the battery monomer assembly 200 in the third direction Z, and the third direction Z is arranged at an angle with the first direction Y and the second direction X.

[0124] The second direction X is the length direction of the box 100, the second surface of the battery monomer 210 is the surface with the smallest area among the side surfaces of the battery monomer 210, specifically, the battery monomer 210 is a cuboid, the length dimension of the battery monomer 210 is greater than the width dimension, and the thickness dimension, the area of the second surface with the smallest area is equal to the width dimension multiplied by the thickness dimension, that is, the second surface is the surface of the battery monomer 210 parallel to the width direction and the thickness direction, and the second surface is the surface of the battery monomer 210 perpendicular to the length direction.

[0125] Therefore, the plurality of columns of battery monomers 210 in the battery monomer assembly 200 are arranged along the length direction of the battery monomer 210, and when the battery monomer assembly 200 is arranged in the box 100, the arrangement direction of the plurality of columns of battery monomers 210 of the battery monomer assembly 200 is along the length direction of the box 100. By sequentially stacking and arranging the plurality of columns of battery monomers 210 in the battery monomer assembly 200 along the length direction of the box 100, the length dimension of the box 100 can be designed according to the size of the battery monomer 210 in the length direction of the box 100, or the number of the plurality of columns of battery monomers 210 of the battery monomer assembly 200 can be set according to the length dimension of the box 100, so as to improve the space utilization in the length direction of the box 100 and improve the energy density of the battery device 1000.

[0126] For example Figures 3-4 As shown, the battery device 1000 includes a plurality of battery monomer assemblies 200, each battery monomer assembly 200 can include one or more columns of battery monomers 210, the battery device 1000 in the embodiment of the present application includes three battery monomer assemblies 200, the three battery monomer assemblies 200 are sequentially arranged along the second direction X, each battery monomer assembly 200 includes two columns of battery monomers 210 arranged side by side in the second direction X, and the plurality of battery monomers 210 in each column of battery monomers 210 are stacked and arranged in the first direction Y, and the first direction Y is the thickness direction of the battery monomer 210 and also the left-right direction, and the second direction X is the length direction of the battery monomer 210 and also the front-rear direction.

[0127] Further, the heat exchange assembly 300 is arranged on one side of the battery monomer assembly 200 in the third direction Z, or the heat exchange assembly 300 is arranged on both sides of the battery monomer assembly 200 in the third direction Z. For example, the third direction Z is the up-down direction, the heat exchange assembly 300 can be arranged on the upper side or the lower side of the battery monomer assembly 200, or the heat exchange assembly 300 can be arranged on both the upper side and the lower side of the battery monomer assembly 200. Therefore, the heat exchange assembly 300 can exchange heat with the plurality of battery monomers 210 of the battery monomer assembly 200, so that the plurality of battery monomers 210 can work in a suitable temperature range, and the uniform temperature performance between the battery monomers 210 is improved, and the reliability, stability and service life of the battery device 1000 are improved.

[0128] In the above technical solution, since the stacking direction of the first surface with the largest area of the plurality of battery monomers 210 in the battery monomer assembly 200 is along the width direction of the box body 100, the plurality of battery monomers 210 in the battery monomer assembly 200 are arranged in a stacked manner along the width direction of the box body 100, and the second surface with the smallest area of the plurality of columns of battery monomers 210 in the battery monomer assembly 200 is perpendicular to the length direction of the box body 100, the plurality of columns of battery monomers 210 in the battery monomer assembly 200 are arranged in a stacked manner along the length direction of the box body 100 in turn, thereby the width size of the box body 100 can be matched by adjusting the number of the battery monomers 210 in the battery monomer assembly 200, the length size of the box body 100 can be matched by adjusting the number of the plurality of columns of battery monomers 210 in the battery monomer assembly 200, the space utilization in the width direction and the length direction of the box body 100 is improved, and the energy density of the battery device 1000 is improved. Meanwhile, the heat exchange assembly 300 includes at least two heat exchange pipes 30 which are bent and extended for heat exchange with the battery monomer assembly 200, the bent and extended heat exchange pipes 30 can adjust the bending position and arrangement density according to the arrangement form of the battery monomer assembly 200 in the width direction and the length direction of the box body 100, thereby the heat exchange efficiency of the battery monomer assembly 200 is effectively improved, the probability of local temperature being too high and local temperature being too low of the battery monomer assembly 200 is reduced, and the temperature uniformity in the battery monomer assembly 200 is improved.

[0129] In some embodiments of the present application, as shown in Figure 5 At least part of the heat exchange flow channel 31 of any heat exchange pipe 30 is formed into a flow channel main body 311, and the flow channel main bodies 311 of the at least two heat exchange pipes 30 are arranged along the second direction X.

[0130] The flow channel main body 311 of the heat exchange flow channel 31 refers to a flow channel assembly formed by at least most of the flow channels being arranged together, wherein the heat exchanged between the heat exchange medium and the battery monomer 210 in the flow channel main body 311 is greater than the heat exchanged between the heat exchange medium and the battery monomer 210 in the remaining part of the flow channel of the heat exchange flow channel 31 except the flow channel main body 311. Further, the heat exchange contact area between the flow channel main body 311 and the battery monomer 210 is greater than the heat exchange contact area between the remaining part of the flow channel of the heat exchange flow channel 31 except the flow channel main body 311 and the battery monomer 210.

[0131] In some examples, in the flow direction of the heat exchange medium, the total extension length in the flow channel main body 311 is greater than the total extension length of the remaining part of the flow channel of the heat exchange flow channel 31 except the flow channel main body 311, and the flow time of the heat exchange medium in the flow channel main body 311 is greater than the flow time of the heat exchange medium in the remaining part of the flow channel of the heat exchange flow channel 31 except the flow channel main body 311.

[0132] In some examples, each heat exchange pipe 30 has a heat exchange flow channel 31 with a flow channel body 311, and for a heat exchange flow channel 31, the heat exchange flow channel 31 can be only a part of the flow channel formed into the flow channel body 311, or the heat exchange flow channel 31 can be the entire flow channel collectively formed into the flow channel body 311.

[0133] In the multiple heat exchange flow channels 31, at least two flow channel bodies 311 are arranged along the second direction X, that is, a part of the multiple flow channel bodies 311, such as two, three, or four flow channel bodies 311, can be arranged along the length direction of the box body 100, or all of the multiple flow channel bodies 311 can be arranged along the length direction of the box body 100.

[0134] For example, when the multiple heat exchange flow channels 31 are integrally formed into the flow channel body 311, the multiple heat exchange flow channels 31 can be arranged along the length direction of the box body 100, and when the multiple heat exchange flow channels 31 are partially formed into the flow channel body 311, the flow channel bodies 311 of the multiple heat exchange flow channels 31 are arranged along the length direction of the box body 100.

[0135] In the utility model, the second direction X is the length direction of the battery device 1000, and the multiple flow channel bodies 311 are arranged along the length direction of the battery device 1000, so that the multiple battery monomers 210 can be divided into multiple regions according to the length direction of the battery device 1000, and one or more flow channel bodies 311 of the heat exchange flow channel 31 are arranged in each region to exchange heat with the battery monomer 210 in the region.

[0136] Since the multiple heat exchange flow channels 31 are formed into the flow channel body 311, and the flow channel body 311 is arranged more concentratedly than other parts of the heat exchange flow channel 31, the flow channel body 311 can bear more heat exchange functions in the heat exchange flow channel 31, therefore, by limiting the arrangement direction of the flow channel body 311 in different heat exchange flow channels 31, the heat exchange efficiency between different heat exchange flow channels 31 and corresponding heat exchange regions can be accurately controlled, and by setting the arrangement direction of the flow channel body 311 in the heat exchange flow channel 31 as the length direction of the box body 100, the heat exchange efficiency between the heat exchange flow channel 31 and the battery monomer 210 in the box body 100 can be improved while meeting the compact arrangement of the battery monomer 210 in the long box body 100.

[0137] The heat exchange assembly 300 has a plurality of heat exchange pipes 30, each of which is bent and extended and defines a heat exchange flow channel 31 on the inner side, each of which has a flow channel body 311, and the flow channel bodies 311 of the plurality of heat exchange flow channels 31 are arranged in sequence along the first direction X. Since the plurality of battery cell assemblies 200 are arranged in sequence along the length direction of the box body 100, the plurality of battery cell assemblies 200 are arranged in sequence along the length direction of the box body 100, and the plurality of flow channel bodies 311 are arranged in sequence along the length direction of the box body 100, each flow channel body 311 can be in contact with one or a plurality of battery cell assemblies 200 arranged adjacent for heat exchange, or each flow channel body 311 can be in contact with one column or a plurality of columns of battery cells 210 arranged adjacent for heat exchange. For example, the flow channel body 311 of the first heat exchange flow channel 31a exchanges heat with two battery cell assemblies 200, and the flow channel body 311 of the second heat exchange flow channel 31b exchanges heat with one battery cell assembly 200. In this way, the temperature uniformity between the battery cell assemblies 200 can be improved.

[0138] In this way, by controlling the temperature of the corresponding heat exchange flow channel 31, the temperature of the heat exchange medium in each flow channel body 311 can be controlled, so that the temperature of each battery cell assembly 200 or each column of battery cells 210 can be independently and accurately controlled, and the temperature difference between different battery cell assemblies 200 or different columns of battery cells 210 can be reduced, and the temperature uniformity between the battery cell assemblies 200 or the plurality of columns of battery cells 210 can be improved.

[0139] In addition, since the plurality of flow channel bodies 311 are arranged in sequence along the length direction of the box body 100, and each column of battery cells 210 of the battery cell assembly 200 is stacked and arranged along the width direction of the box body 100, for each flow channel body 311, when bent and extended, it can be arranged to extend reciprocally along the width direction of the box body 100. In this way, the flow channel body 311 can be in contact with each battery cell 210 in the corresponding heat exchange region when reciprocally extended, reducing the risk of local temperature being too high or too low in the corresponding heat exchange region due to the battery cell 210 not being in contact with the flow channel body 311, thereby improving the temperature uniformity between the battery cells 210.

[0140] In the above technical solution, by arranging the flow channel main bodies 311 of the multiple heat exchange flow channels 31 along the length direction of the box body, the temperature of each battery monomer assembly 200 or each column of battery monomers 210 can be independently and accurately controlled by controlling the temperature of the heat exchange medium in each flow channel main body 311, the temperature uniformity between the battery monomer assemblies 200 is improved, and the flow channel main bodies 311 can be conveniently arranged to extend back and forth along the width direction of the box body 100, so that each battery monomer 210 in the corresponding heat exchange area is in contact with the flow channel main body 311 for heat exchange, the risk of local temperature being too high or too low in the corresponding heat exchange area due to the battery monomers 210 not being in contact with the flow channel main body 311 is reduced, and the temperature uniformity between the battery monomers 210 is improved.

[0141] In some embodiments of the utility model, as shown in Figure 5 The heat exchange flow channel 31 includes a transverse part 3101 and a longitudinal part 3102, the longitudinal part 3102 extends along the second direction X, and the transverse part 3101 extends along the first direction Y, wherein the longitudinal part 3102 is closer to the edge of the box body 100 than the transverse part 3101.

[0142] In some examples, the longitudinal part 3102 can extend along a straight line parallel to the second direction X, the longitudinal part 3102 can also extend along a straight line inclined relative to the second direction X, and the longitudinal part 3102 can also extend along a curve and / or a broken line extending along the second direction X. The transverse part 3101 can extend along a straight line parallel to the first direction Y, can also extend along a straight line inclined relative to the first direction Y, and can also extend along a curve and / or a broken line extending along the first direction Y.

[0143] In some examples, the number of longitudinal parts 3102 in each heat exchange flow channel 31 can be one or more, and multiple longitudinal parts 3102 can be arranged at intervals in the first direction Y. The number of transverse parts 3101 in each heat exchange flow channel 31 can be one or more, and multiple transverse parts 3101 can be arranged at intervals in the second direction X.

[0144] The longitudinal part 3102 extends along the length direction of the box body 100, and the transverse part 3101 extends along the width direction of the box body 100, which can simplify the structure of the heat exchange flow channel 31, facilitate the molding of the heat exchange flow channel 31, and facilitate the combination and arrangement of multiple heat exchange flow channels 31 in the box body 100.

[0145] In some examples, the length of the longitudinal portion 3102 can be greater than, less than, or equal to the total length of the plurality of battery cells 210 arranged in the second direction X, wherein either end of the longitudinal portion 3102 can extend beyond the plurality of battery cells 210, can be flush with the ends of the plurality of battery cells 210 in the second direction X, or can be located between the two ends of the plurality of battery cells 210 in the second direction X. The length of the transverse portion 3101 in the first direction Y can be greater than, equal to, or less than the total length of the plurality of battery cells 210 arranged in the first direction Y, and either end of the transverse portion 3101 in the first direction Y can extend beyond or be flush with one side edge of the plurality of battery cells 210 arranged in the first direction Y, or can be located between the two side edges of the plurality of battery cells 210 arranged in the first direction Y.

[0146] The edge of the box 100 refers to the position where the box 100 meets the external environment space of the box 100, and the edge of the box 100 is closer to the outside of the box 100 than other parts of the box 100.

[0147] The longitudinal portion 3102 is closer to the edge of the box 100 than the transverse portion 3101, which means that the distance between the longitudinal portion 3102 and the outer side surface of the box 100 in the first direction Y is less than the distance between the transverse portion 3101 and the outer side surface of the box 100. At this time, the longitudinal portion 3102 is arranged on the outer circumferential side of the transverse portion 3101. For example, the longitudinal portion 3102 can be arranged on one side of the transverse portion 3101 in the first direction Y, or the longitudinal portion 3102 can be arranged on both sides of the transverse portion 3101 in the first direction Y. In this way, the longitudinal portion 3102 can enclose the transverse portion 3101, and the longitudinal portion 3102 can exchange heat with the peripheral battery cells 210 of the plurality of battery cells 210 that are closer to the side wall of the box 100.

[0148] It should be noted that the temperature of the heat exchange medium gradually changes during the flow of the heat exchange medium in the heat exchange flow channel 31, which causes the heat exchange effect to gradually decrease. Specifically, when heating the battery cells, the temperature of the heat exchange medium gradually decreases as the heat exchange medium flows, and when cooling the battery cells 210, the temperature of the heat exchange medium gradually increases as the heat exchange medium flows.

[0149] At the same time, the peripheral battery cells 210 near the edge of the box 100 are closer to the external environment of the box 100 than the internal battery cells 210, and therefore, the peripheral battery cells 210 near the edge of the box 100 exchange more heat with the external environment and lose heat faster than the internal battery cells 210 near the middle of the box 100.

[0150] When the battery device 1000 is in the high-temperature cooling condition, the heat exchange medium entering from the inlet 3103 of the heat exchange flow channel 31 can first enter the longitudinal part 3102 of the heat exchange flow channel 31 and then flow to the transverse part 3101 of the heat exchange flow channel 31, or the heat exchange medium can first enter the transverse part 3101 of the heat exchange flow channel 31 and then flow to the longitudinal part 3102. When the heat exchange medium first enters the transverse part 3101 and then flows to the longitudinal part 3102, the internal battery monomer 210 close to the middle position of the box 100 can be cooled in the transverse part 3101 first, and then the peripheral battery monomer 210 close to the edge of the box 100 can be cooled in the longitudinal part 3102. Since the peripheral battery monomer 210 close to the edge of the box 100 can be directly cooled to the environment through the box 100, the natural cooling of the peripheral battery monomer 210 close to the edge of the box 100 is better than that of the internal battery monomer 210, so the heat exchange medium with lower temperature in the transverse part 3101 can better meet the cooling demand of the battery monomer 210 at the middle position of the box 100. At the same time, since the peripheral battery monomer 210 close to the edge of the box 100 can be directly cooled to the environment, when the temperature of the heat exchange medium in the longitudinal part 3102 is slightly higher, the cooling demand of the peripheral battery monomer 210 can still be met, so that the cooling effect of the peripheral battery monomer 210 close to the edge of the box 100 and the battery monomer 210 close to the middle of the box 100 is substantially consistent, and then the temperature of the peripheral battery monomer 210 close to the edge of the box 100 and the battery monomer 210 close to the middle of the box 100 after cooling is relatively consistent, the internal and external temperature difference between the battery monomers 210 due to cooling to the environment is reduced, and the temperature distribution in the battery device 1000 is more uniform.

[0151] When the battery device is in the low-temperature heating working condition, the heat exchange medium entering from the inlet 3103 of the heat exchange flow channel 31 can first enter the longitudinal part 3102 of the heat exchange flow channel 31 and then flow to the transverse part 3101 of the heat exchange flow channel 31, or the heat exchange medium can first enter the transverse part 3101 of the heat exchange flow channel 31 and then flow to the longitudinal part 3102. For example, when the heat exchange medium flows from the longitudinal part 3102 to the transverse part 3101, the heat exchange medium can first heat the peripheral battery monomer 210 close to the edge of the box body 100 in the longitudinal part 3102, and then enter the transverse part 3101 to cool the battery monomer 210 close to the middle of the box body 100. Since the peripheral battery monomer 210 close to the edge of the box body 100 loses more heat to the external environment, the temperature of the peripheral battery monomer 210 is more likely to drop, and the heat exchange medium with a higher temperature is first heated to the peripheral battery monomer 210 close to the edge of the box body 100. The heat exchange medium with a higher temperature can increase the temperature of the peripheral battery monomer 210 while compensating for the heat loss of the peripheral battery monomer 210 close to the edge of the box body 100 due to heat loss to the external environment, thereby meeting the heating needs. At the same time, the battery monomer 210 close to the middle of the box body 100 has a small contact area with the external environment and loses less heat. The heat exchange medium with a slightly lower temperature flowing in the transverse part 3101 can cooperate with the heat generated by the battery monomer itself to meet the heating needs. Thus, the heating effect of the peripheral battery monomer 210 close to the edge of the box body 100 and the battery monomer 210 close to the middle of the box body 100 can be substantially the same, and the temperature of the peripheral battery monomer 210 close to the edge of the box body 100 and the battery monomer 210 close to the middle of the box body 100 after heating can be more uniform, thereby reducing the internal and external temperature difference between the battery monomers 210 due to heat loss to the environment, and making the temperature distribution in the battery device 1000 more uniform.

[0152] In addition, the longitudinal part 3102 can realize heat conduction in the length direction of the battery device 1000, and the transverse part 3101 can realize heat conduction in the width direction of the battery device 1000. Thus, the temperature difference in the length direction and the width direction of the battery device 1000 can be further reduced, and the temperature uniformity of the battery device 1000 can be further improved.

[0153] In some examples, each heat exchange flow channel 31 includes a plurality of transverse sections 3101 extending along the width direction of the box body 100 and arranged at intervals along the length direction of the box body 100, and the flow channel body 311 extends reciprocally along the width direction of the box body 100 and includes a plurality of transverse sections 3101 connected in sequence, wherein each column of battery monomers 210 exchanges heat with at least two transverse sections 3101. In this way, the heat exchange temperature of each column of battery monomers 210 with the heat exchange flow channel 31 is equivalent to the average temperature of the plurality of transverse sections 3101, so that the risk of local temperature being too high or too low in the battery device 1000 can be reduced, and the uniform temperature performance of the battery device 1000 can be improved. For example, each column of battery monomers 210 can exchange heat with two, three, four or more transverse sections 3101.

[0154] In the above technical solution, since the longitudinal section 3102 is closer to the edge of the box body 100 than the transverse section 3101, the longitudinal section 3102 can exchange heat with the peripheral battery monomers 210 close to the edge of the box body 100 among the plurality of battery monomers 210, and the transverse section 3101 can exchange heat with the battery monomers 210 close to the middle of the box body 100. When the heat exchange medium flows into the longitudinal section 3102 and the transverse section 3101 in sequence, the internal and external temperature difference of the peripheral battery monomers 210 close to the edge of the box body 100 and the battery monomers 210 close to the middle of the box body 100 due to heat exchange with the environment can be compensated for, the heat exchange effect of the peripheral battery monomers 210 close to the edge of the box body 100 and the battery monomers 210 close to the middle of the box body 100 can be made consistent, the uniform temperature performance of the battery device 1000 can be improved, and the service life of the battery device 1000 can be improved to some extent. In addition, the heat exchange flow channel 31 includes the longitudinal section 3102 extending along the second direction X and the transverse section 3101 extending along the first direction Y, which can simplify the structure of the heat exchange flow channel 31 and facilitate the processing and arrangement of the heat exchange flow channel 31.

[0155] In some embodiments of the present application, as shown in Figure 5 The plurality of transverse sections 3101 in the flow channel body 311 are arranged at intervals in the second direction X and connected in sequence, and the longitudinal section 3102 in the flow channel body 311 is connected to at least part of the transverse sections 3101.

[0156] That is, the flow channel body 311 can include at least one longitudinal section 3102 and a plurality of transverse sections 3101, wherein the flow channel body 311 can include two, three, four, five, six, eight or more transverse sections 3101, and the plurality of transverse sections 3101 can increase the heat exchange area of the flow channel body 311 with the plurality of battery monomers 210 and improve the heat exchange efficiency with the battery monomers 210.

[0157] The longitudinal portion 3102 can be connected with part of the plurality of transverse portions 3101, or the longitudinal portion 3102 can be connected with each of the plurality of transverse portions 3101. For example, the flow channel body 311 can include only one longitudinal portion 3102 and a plurality of transverse portions 3101, the plurality of transverse portions 3101 are sequentially connected, and the longitudinal portion 3102 is connected to one of the plurality of transverse portions 3101 at the end in the second direction X. For another example, the flow channel body 311 includes one longitudinal portion 3102 and a plurality of transverse portions 3101, the longitudinal portion 3102 is connected to one end of each of the plurality of transverse portions 3101 in the first direction Y, and the plurality of transverse portions 3101 are connected through the longitudinal portion 3102.

[0158] In the above technical solution, since the plurality of transverse portions 3101 of the flow channel body 311 are sequentially connected in the second direction X, and the longitudinal portion 3102 is connected to part or all of the plurality of transverse portions 3101, the plurality of transverse portions 3101 can increase the arrangement density of the flow channel body 311 in the length direction of the battery device 1000, improve the heat exchange efficiency and uniformity of the heat exchange with the battery monomer 210, the longitudinal portion 3102 is arranged at a position closer to the edge of the box body 100 and is connected with the transverse portion 3101, the longitudinal portion 3102 can exchange heat with the peripheral battery monomer 210 close to the edge of the box body 100, increase the heat exchange area with the peripheral battery monomer 210, and improve the temperature uniformity of the battery device 1000.

[0159] In some embodiments of the utility model, as shown in Figure 5 The flow channel body 311 includes a first heat exchange portion 3111 and a second heat exchange portion 3112, the first heat exchange portion 3111 is bent and extended to define a U-shaped region, and the second heat exchange portion 3112 is arranged in the U-shaped region and is bent and connected to one end of the first heat exchange portion 3111.

[0160] The first heat exchange portion 3111 is bent and extended to be U-shaped, which can lengthen the first heat exchange portion 3111, increase the heat exchange time and area of the heat exchange medium with the battery monomer 210 in the first heat exchange portion 3111, and improve the heat exchange effect.

[0161] The second heat exchange portion 3112 is bent and extended and arranged inside the first heat exchange portion 3111, for example, the second heat exchange portion 3112 can be bent and extended in the U-shaped, S-shaped or hufan-shaped region in the first heat exchange portion 3111. The second heat exchange portion 3112 is arranged in the bent manner, which can increase the extension length of the second heat exchange portion 3112, increase the heat exchange time of the heat exchange medium with the battery monomer 210 in the second heat exchange portion 3112, and improve the heat exchange effect.

[0162] The first heat exchange part 3111 and the second heat exchange part 3112 are connected by bending, for example, the first heat exchange part 3111 and the second heat exchange part 3112 can be connected by a bent flow channel section, and the bent flow channel section can be bent along an arc and / or a broken line. In this way, the structure of the flow channel body 311 can be compact, the arrangement density of the flow channel of the flow channel body 311 can be improved, and the uniformity of heat exchange for the plurality of battery monomers 210 can be improved.

[0163] In some specific examples, the first heat exchange part 3111 and the second heat exchange part 3112 are bent in the same plane, thereby simplifying the structure of the flow channel body 311, reducing the processing difficulty of the flow channel body 311, and reducing the space occupation of the flow channel body 311.

[0164] The first heat exchange part 3111 is connected on the upstream side or the downstream side of the second heat exchange part 3112 in the flow direction of the heat exchange medium, for example, when the heat exchange medium flows into the flow channel body 311, the heat exchange medium can first flow into the first heat exchange part 3111 and then flow into the second heat exchange part 3112, or the heat exchange medium can first flow into the second heat exchange part 3112 and then flow into the first heat exchange part 3111.

[0165] Specifically, when the heat exchange assembly 300 cools the battery monomers 210, the heat exchange medium in the flow channel body 311 can flow from the second heat exchange part 3112 to the first heat exchange part 3111. At this time, the lower-temperature heat exchange medium first cools the battery monomers 210 at the middle position of the heat exchange region corresponding to the flow channel body 311, and then cools the battery monomers 210 at the peripheral position of the heat exchange region. Since the battery monomers 210 at the peripheral position of the heat exchange region are closer to the edge of the box body 100 than the battery monomers 210 at the middle position of the heat exchange region, they are more naturally cooled by the external environment of the box body 100. The lower-temperature heat exchange medium in the second heat exchange part 3112 can better meet the cooling demand of the battery monomers 210 at the middle position of the heat exchange region corresponding to the flow channel body 311. At the same time, since the battery monomers 210 at the peripheral position of the heat exchange region can naturally dissipate more heat to the environment than the battery monomers 210 at the middle position, the heat exchange medium in the first heat exchange part 3111 is slightly higher in temperature, but still meets the cooling demand of the battery monomers 210 at the peripheral position of the heat exchange region corresponding to the flow channel body 311. Thus, the cooling effect of the battery monomers 210 at the peripheral position and the middle position of the heat exchange region corresponding to the flow channel body 311 is generally consistent, and the temperature tends to be consistent, thereby improving the temperature uniformity among the battery monomers 210 in the heat exchange region corresponding to the flow channel body 311.

[0166] When the heat exchange assembly 300 heats the battery monomer 210, the heat exchange medium in the flow channel body 311 can flow from the first heat exchange part 3111 to the second heat exchange part 3112. At this time, the heat exchange medium with a higher temperature first flows into the first heat exchange part 3111 to heat the battery monomer 210 at the peripheral position of the heat exchange region corresponding to the flow channel body 311, and then the heat exchange medium with a slightly lower temperature flows into the second heat exchange part 3112 to heat the battery monomer 210 at the middle position of the heat exchange region corresponding to the flow channel body 311. Since the battery monomer 210 at the peripheral position of the heat exchange region corresponding to the flow channel body 311 is closer to the edge of the box body 100 than the battery monomer 210 at the middle position of the heat exchange region, the heat is more easily lost, and the temperature drops faster. Therefore, the heat exchange medium with a higher temperature in the first heat exchange part 3111 can not only be used to increase the temperature of the battery monomer 210 at the peripheral position of the heat exchange region corresponding to the flow channel body 311, but also can compensate for the heat loss of the battery monomer 210 at the peripheral position of the heat exchange region due to environmental heat dissipation, so as to meet the heating demand of the battery monomer 210. At the same time, the battery monomer 210 at the middle position of the heat exchange region corresponding to the flow channel body 311 has less heat dissipation to the external environment of the box body 100, and the heat exchange medium with a slightly lower temperature in the second heat exchange part 3112 can also meet the heating demand of the battery monomer 210 at the middle position of the heat exchange region corresponding to the flow channel body 311, so that the heating effect of the battery monomers 210 at the peripheral position and the middle position of the heat exchange region corresponding to the flow channel body 311 is basically consistent, and the temperature tends to be consistent, thereby improving the temperature uniformity between the battery monomers 210 in the heat exchange region corresponding to the flow channel body 311.

[0167] In the above technical solution, since the first heat exchange part 3111 of the flow channel body 311 is bent and extended in a U shape, the second heat exchange part 3112 is bent and arranged in the first heat exchange part 3111, and the first heat exchange part 3111 and the second heat exchange part 3112 are bent and connected, the structure of the flow channel body 311 can be compact, the flow channel length of the flow channel body 311 and the heat exchange area with the battery monomer 210 can be increased, the flow time of the heat exchange medium in the flow channel body 311 can be prolonged, the heat exchange efficiency can be improved, and the temperature uniformity between the battery monomers 210 in the region where the flow channel body 311 is located can be improved.

[0168] In some embodiments of the present application, as shown in Figure 5 The second heat exchange part 3112 includes a plurality of horizontal parts 3101, the plurality of horizontal parts 3101 extend along the first direction Y and are arranged at intervals in the second direction X, and the plurality of horizontal parts 3101 of the second heat exchange part 3112 are sequentially bent and connected along the second direction X.

[0169] The second heat exchange part 3112 can include two, three, four, five or more horizontal parts 3101.

[0170] In some examples, the two transverse portions 3101 connected together can be connected by a folding line, or can be connected along an arc, and further, the two adjacent transverse portions 3101 after being bent can be in a U shape or a V shape.

[0171] In the above technical solution, the second heat exchange portion 3112 includes a plurality of transverse portions 3101, which can increase the heat exchange area of the second heat exchange portion 3112, improve the heat exchange efficiency, make the heat of the second heat exchange portion 3112 evenly distributed, improve the temperature uniformity between the battery monomers 210, and further, the plurality of transverse portions 3101 are sequentially connected by bending, which can simplify the structure of the second heat exchange portion 3112 and facilitate the processing and forming of the second heat exchange portion 3112.

[0172] In some embodiments of the utility model, as shown in Figure 5 The connecting position of the two adjacent transverse portions 3101 of the second heat exchange portion 3112 is bent into a semicircular arc.

[0173] For example, the second heat exchange portion 3112 includes a plurality of transverse portions 3101, the plurality of transverse portions 3101 extend along the first direction Y and are arranged in parallel and at intervals in the second direction X, and the interval between the two adjacent transverse portions 3101 can be set according to the heat exchange requirement of the battery monomer 210. Wherein, the plurality of transverse portions 3101 are sequentially connected by bending, and the bending position is a semicircular arc protruding away from the transverse portion 3101 in the first direction Y.

[0174] Wherein, the connecting position of the two transverse portions 3101 is bent into a semicircular arc, which can not only further reduce the flow resistance of the heat exchange medium at the bending position, reduce the pressure drop, and improve the heat exchange performance, but also can reduce the stress concentration at the bending position, and improve the reliability and service life of the heat exchange assembly 300.

[0175] In the above technical solution, the connecting position of the two transverse portions 3101 of the second heat exchange portion 3112 is bent into a semicircular arc, which can not only make the two transverse portions 3101 arranged in parallel and at intervals, compact the structure of the second heat exchange portion 3112, and improve the heat exchange efficiency, but also can reduce the flow resistance of the heat exchange medium, reduce the pressure drop, further improve the heat exchange efficiency of the second heat exchange portion 3112, and further can reduce the stress concentration at the bending position, and improve the service life of the heat exchange assembly 300.

[0176] In some embodiments of the utility model, as shown in Figure 5 The first heat exchange portion 3111 includes two transverse portions 3101 and a longitudinal portion 3102, the two transverse portions 3101 extend along the first direction Y and are arranged at intervals in the second direction X, and the longitudinal portion 3102 extends along the second direction X and is connected between the two transverse portions 3101.

[0177] For example, the two horizontal parts 3101 of the first heat exchange part 3111 extend along the first direction Y and are arranged in parallel and at intervals along the second direction X, and the vertical part 3102 is arranged perpendicularly to the two horizontal parts 3101, and the two ends of the vertical part 3102 along the second direction X are connected to the end of the one end of the two horizontal parts 3101 along the first direction Y respectively, so as to form the U-shaped first heat exchange part 3111.

[0178] In the above technical solution, since the first heat exchange part 3111 comprises the two horizontal parts 3101 and the one vertical part 3102 connected between the two horizontal parts 3101, the second heat exchange part 3112 can be conveniently enclosed inside, the structure of the first heat exchange part 3111 is simplified, the first heat exchange part 3111 is conveniently processed and formed, and the production efficiency is improved.

[0179] In some embodiments of the utility model, as shown in Figure 5 The connection positions of the two horizontal parts 3101 and the vertical part 3102 of the first heat exchange part 3111 are all bent into quarter-arc shapes.

[0180] Specifically, one end of one of the horizontal parts 3101 of the first heat exchange part 3111 is connected to one end of the vertical part 3102, and the connection position is bent into a quarter-arc shape, and one end of the other horizontal part 3101 of the first heat exchange part 3111 is connected to the other end of the vertical part 3102, and the connection position is also bent into a quarter-arc shape.

[0181] In the above technical solution, the connection positions of the horizontal part 3101 and the vertical part 3102 of the first heat exchange part 3111 are bent into quarter-arc shapes, which can make the connection positions of the horizontal part 3101 and the vertical part 3102 smoothly transition, reduce turbulence and vortex, reduce flow resistance, reduce pressure drop, improve heat exchange efficiency, reduce stress concentration at the connection positions of the horizontal part 3101 and the vertical part 3102, improve the structural stability and durability of the connection positions of the horizontal part 3101 and the vertical part 3102, and improve the service life of the heat exchange assembly 300. In addition, the processing and forming of the first heat exchange part 3111 can be facilitated, and the risk of leakage at the connection positions of the horizontal part 3101 and the vertical part 3102 can be reduced.

[0182] In some embodiments of the utility model, as shown in Figure 5 The first heat exchange part 3111 and the second heat exchange part 3112 are bent and connected.

[0183] Specifically, the other end of one of the horizontal parts 3101 of the first heat exchange part 3111 is bent and connected to the closest horizontal part 3101 of the plurality of horizontal parts 3101 of the second heat exchange part 3112.

[0184] In the technical scheme, the first heat exchange part 3111 and the second heat exchange part 3112 are connected by bending, the second heat exchange part 3112 can be conveniently arranged in the first heat exchange part 3111, the first heat exchange part 3111 can conveniently cover the second heat exchange part 3112, the structure of the heat exchange flow channel 31 is compact, the uniformity of the heat exchange flow channel 31 on the surface of the plurality of battery monomers 210 is improved, and the uniform temperature performance of the battery device 1000 is improved.

[0185] In some embodiments of the utility model, as shown in Figure 5 The connecting position of the first heat exchange part 3111 and the second heat exchange part 3112 is bent into a semicircular arc.

[0186] For example, the first heat exchange part 3111 and the second heat exchange part 3112 are connected by a semicircular arc-shaped bending section, wherein the bending section extends along a semicircular arc line that protrudes in the first direction Y away from the first heat exchange part 3111 and the second heat exchange part 3112.

[0187] In the technical scheme, the connecting position of the first heat exchange part 3111 and the second heat exchange part 3112 is bent into a semicircular arc, which can smoothly transition the connecting position of the first heat exchange part 3111 and the second heat exchange part 3112, reduce turbulence and vortex flow, reduce flow resistance, reduce pressure drop, improve heat exchange efficiency, reduce stress concentration at the connecting position of the first heat exchange part 3111 and the second heat exchange part 3112, improve the structural stability and durability of the connecting position of the first heat exchange part 3111 and the second heat exchange part 3112, and improve the service life of the heat exchange assembly 300. In addition, the processing and forming of the flow channel main body 311 can be facilitated, and the risk of leakage at the connecting position of the first heat exchange part 3111 and the second heat exchange part 3112 can be reduced.

[0188] In some embodiments of the utility model, as shown in Figure 6 and Figure 5 The inlets 3103 and the outlets 3104 of the plurality of heat exchange flow channels 31 are located at the same end of the battery device 1000 in the second direction X.

[0189] For example, the second direction X is the front-to-back direction of the battery device 1000, and the inlets 3103 and the outlets 3104 of the plurality of heat exchange flow channels 31 can be arranged at the front end of the battery device 1000, or can be arranged at the rear end of the battery device 1000.

[0190] Since the inlet 3103 and the outlet 3104 of each heat exchange channel 31 are arranged at one end of the length direction of the box body 100, the heat exchange medium in the external pipeline can enter each heat exchange channel 31 from one end of the length direction of the box body 100, which is not only conducive to the centralized input of the heat exchange medium to the plurality of heat exchange channels 31, but also makes the temperature and flow of the heat exchange medium entering the inlet 3103 of each heat exchange channel 31 consistent, so that the heat exchange capacity of the plurality of heat exchange channels 31 is more balanced, and the temperature uniformity between the battery monomers 210 corresponding to each heat exchange channel 31 is improved.

[0191] Further, since each heat exchange channel 31 is formed with a channel body 311, the plurality of channel bodies 311 of the plurality of heat exchange channels 31 are arranged along the length direction of the box body 100, and the inlet 3103 and the outlet 3104 of the plurality of heat exchange channels 31 are arranged at one end of the length direction of the box body 100, then the channel bodies 311 arranged at intervals with the inlet 3103 and the outlet 3104 in the length direction of the box body 100 need to be connected with the inlet 3103 and the outlet 3104 through the channel sections (such as the first connecting part and the second connecting part described below). In this way, the channel section connected between the channel body 311 and the inlet 3103 and the outlet 3104 can increase the extension length of the heat exchange channel 31, prolong the flow path of the heat exchange medium, and improve the heat exchange efficiency.

[0192] The channel body 311 closest to the inlet 3103 and the outlet 3104 is set as the first channel body, and the channel body 311 arranged on the side away from the inlet 3103 and the outlet 3104 of the first channel body is set as the second channel body. Since the channel body 311 is a collection of channels arranged together in the heat exchange channel 31, when the second channel body is connected with the inlet 3103 and the outlet 3104 through the channel section, the channel section can only be arranged on one side of the first channel body in the width direction of the box body 100, so that the channel section connected with the inlet 3103 and the outlet 3104 can be arranged closer to the edge of the box body 100. In this way, in the heating working condition, the heat exchange medium with a higher temperature entering from the inlet 3103 can exchange heat with the battery monomers 210 close to the edge of the box body 100 to make up for the heat loss of the battery monomers 210 close to the edge of the box body 100 due to heat dissipation to the environment, thereby improving the temperature uniformity between the battery monomers 210 close to the edge of the box body 100 and the battery monomers 210 close to the middle region of the box body 100.

[0193] In addition, when the flow channel section connected at the inlet 3103 and the second flow channel body and the flow channel section connected at the outlet 3104 and the second flow channel body are arranged on the same side of the first flow channel body, the two flow channel sections can be arranged adjacent and side by side, and since the two flow channel sections are connected to the inlet 3103 and the outlet 3104 of the heat exchange flow channel respectively, the temperature difference is the largest, at this time, the heat exchange temperature of the two flow channel sections and the corresponding heat exchange area can be approximately the average temperature of the two flow channel sections, so that the probability of local temperature being too high or too low in the battery device 1000 can be reduced, and the temperature uniformity between the battery monomers 210 can be improved.

[0194] In the above technical solution, the inlets 3103 and the outlets 3104 of the plurality of heat exchange flow channels 31 are located on the same end of the battery device 1000 in the second direction X, so that the inlets 3103 and the outlets 3104 of the plurality of heat exchange flow channels 31 can be arranged concentratedly, thereby the plurality of heat exchange flow channels 31 can be connected to the external pipeline concentratedly, the structure and layout of the external pipeline can be simplified, the installation and maintenance difficulty can be reduced, the arrangement space of the inlets 3103, the outlets 3104 and the external pipeline can be reduced, the structure is compact, the space occupation is reduced, the space utilization rate is improved. The temperature uniformity between the battery monomers 210 corresponding to each heat exchange flow channel 31 can be improved, the temperature uniformity between the battery monomers 210 at the edge position of the box body 100 and the battery monomers 210 close to the middle area of the box body 100 can be improved, the probability of local temperature being too high or too low in the battery device 1000 can be reduced, and the temperature uniformity of the battery device 1000 can be improved.

[0195] In some embodiments of the utility model, as shown in Figure 6 and Figure 5 It is shown that the inlets 3103 of the plurality of heat exchange flow channels 31 are communicated, and the outlets 3104 of the plurality of heat exchange flow channels 31 are communicated.

[0196] That is, the plurality of heat exchange flow channels 31 are connected in parallel, when the heat exchange medium in the external pipeline enters the heat exchange assembly 300, the heat exchange medium can enter the plurality of heat exchange flow channels 31 uniformly through the inlets 3103 of the plurality of heat exchange flow channels 31, the uniformity of heat exchange of the battery monomers 210 can be improved.

[0197] The plurality of heat exchange flow channels 31 are connected in parallel, which can also reduce the length of a single heat exchange flow channel 31, reduce the flow resistance, reduce the pressure drop, improve the heat exchange efficiency, and when a certain heat exchange flow channel 31 fails, the remaining heat exchange flow channels 31 can work normally, thereby the reliability of the battery device 1000 can be improved, and the risk of thermal runaway of the battery device 1000 can be reduced.

[0198] In the technical solution, the inlets 3103 of the plurality of heat exchange channels 31 are all communicated, and the outlets 3104 are also all communicated, so that the heat exchange medium can be uniformly distributed in the plurality of heat exchange channels 31, the temperature uniformity of the battery device 1000 is improved, the flow resistance is reduced, the heat exchange efficiency is improved, and the risk of thermal runaway of the battery device 1000 is reduced.

[0199] In some embodiments of the utility model, as shown in Figure 6 and Figure 5 , the plurality of heat exchange channels 31 include a first heat exchange channel 31a and a second heat exchange channel 31b, the flow channel body 311 of the first heat exchange channel 31a is arranged closest to the inlet 3103 and the outlet 3104, and the second heat exchange channel 31b further includes a first connecting part 312 and a second connecting part 313, the first connecting part 312, the flow channel body 311 and the second connecting part 313 are sequentially connected, one end of the first connecting part 312 away from the flow channel body 311 forms the inlet 3103, and one end of the second connecting part 313 away from the flow channel body 311 forms the outlet 3104; wherein the first connecting part 312 and the second connecting part 313 both extend along the second direction X.

[0200] The number of the first heat exchange channel 31a is one, and the number of the second heat exchange channel 31b can be one or more, when the number of the second heat exchange channel 31b is more, the flow channel bodies 311 of the plurality of second heat exchange channels 31b are sequentially arranged along the second direction X.

[0201] For example, the inlets 3103 and the outlets 3104 of the plurality of heat exchange channels 31 are arranged at the front end of the battery device 1000, the flow channel bodies 311 of the plurality of heat exchange channels 31 are arranged at the rear side of the inlets 3103 and the outlets 3104 and sequentially arranged along the front-rear direction, wherein the flow channel body 311 of the first heat exchange channel 31a is located at the frontmost of the plurality of flow channel bodies 311, and the flow channel body 311 of the second heat exchange channel 31b is arranged at the rear side of the flow channel body 311 of the first heat exchange channel 31a.

[0202] Further, for the first heat exchange channel 31a, the entire flow channel of the first heat exchange channel 31a is the flow channel body 311, and the flow channel body 311 has the inlet 3103 and the outlet 3104 formed at both ends thereof.

[0203] For the second heat exchange channel 31b, the channel body 311 of the second heat exchange channel 31b is arranged at the rear side of the first heat exchange channel 31a. In order to arrange the inlet 3103 and the outlet 3104 of the second heat exchange channel 31b at the front side of the first heat exchange channel 31a, the second heat exchange channel 31b further comprises a first connecting part 312 and a second connecting part 313. The rear end of the first connecting part 312 and the rear end of the second connecting part 313 are connected to the two ends of the channel body 311 respectively. The front end of the first connecting part 312 extends to the front side of the first heat exchange channel 31a and forms the inlet 3103 of the second heat exchange channel 31b. The front end of the second connecting part 313 extends to the front side of the first heat exchange channel 31a and forms the outlet 3104 of the second heat exchange channel 31b.

[0204] In the second direction X, the first connecting part 312 can extend along a straight line, a curve and / or a broken line. The second connecting part 313 can extend along a straight line, a curve and / or a broken line.

[0205] In some specific examples, the first connecting part 312 comprises a horizontal part 3101 and a vertical part 3102. One end of the vertical part 3102 of the first connecting part 312 is connected to one end of the channel body 311 of the second heat exchange channel 31b. The other end of the vertical part 3102 of the first connecting part 312 extends along a straight line in the second direction X towards the inlet 3103 and the outlet 3104. The horizontal part 3101 of the first connecting part 312 extends along the first direction Y. One end of the horizontal part 3101 of the first connecting part 312 is connected to the other end of the vertical part 3102 of the first connecting part 312. The other end of the horizontal part 3101 of the first connecting part 312 forms the inlet 3103 of the second heat exchange channel 31b. Further, the horizontal part 3101 of the first connecting part 312 is arranged perpendicularly to the vertical part 3102. The connection position of the horizontal part 3101 and the vertical part 3102 of the first connecting part 312 is bent into a quarter-arc shape.

[0206] In some specific examples, the second connecting portion 313 includes a horizontal portion 3101 and a vertical portion 3102, one end of the vertical portion 3102 of the second connecting portion 313 is connected to the other end of the flow channel main body 311 of the second heat exchange flow channel 31b, the other end of the vertical portion 3102 of the second connecting portion 313 extends along a straight line in the second direction X towards the inlet 3103 and the outlet 3104, the horizontal portion 3101 of the second connecting portion 313 extends along the first direction Y, one end of the horizontal portion 3101 of the second connecting portion 313 is connected to the other end of the vertical portion 3102 of the second connecting portion 313, and the other end of the horizontal portion 3101 of the second connecting portion 313 forms the outlet 3104 of the second heat exchange flow channel 31b. Further, the horizontal portion 3101 of the second connecting portion 313 is arranged perpendicular to the vertical portion 3102, and the connection position of the horizontal portion 3101 and the vertical portion 3102 of the second connecting portion 313 is bent into a quarter circular arc shape.

[0207] In some specific examples, the first connecting portion 312 and the second connecting portion 313 can be located on the same side of the first heat exchange flow channel 31a in the first direction Y, and the first connecting portion 312 and the second connecting portion 313 can be located on both sides of the second heat exchange flow channel 31b in the first direction Y, respectively.

[0208] When the heat exchange medium flows into the second heat exchange flow channel 31b, the heat exchange medium first enters the first connecting portion 312 from the inlet 3103, flows into the flow channel main body 311 through the first connecting portion 312, and then flows into the second connecting portion 313, and finally flows out from the outlet 3104, wherein the heat exchange medium flowing through the first connecting portion 312, the flow channel main body 311 and the second connecting portion 313 exchanges heat with the battery monomer 210, so as to make the battery monomer 210 work in an appropriate temperature range.

[0209] In some specific examples, the inlet 3103 and the outlet 3104 are located at one end of the box body 100 in the second direction X, and the flow channel main body 311 of the second heat exchange flow channel 31b is located on the side of the flow channel main body 311 of the first heat exchange flow channel 31a away from the inlet 3103 and the outlet 3104. At this time, in order to realize the connection of the inlet 3103 and the outlet 3104 with the flow channel main body 311 of the second heat exchange flow channel 31b, the first connecting portion 312 and the second connecting portion 313 need to be arranged on one side or both sides of the flow channel main body 311 of the first heat exchange flow channel 31a in the first direction Y, that is, the first connecting portion 312 and the second connecting portion 313 are arranged closer to the edge of the box body 100 than the flow channel main body 311 of the first heat exchange flow channel 31a and the flow channel main body 311 of the second heat exchange flow channel 31b.

[0210] When the battery device 1000 is in the low-temperature heating working condition, the higher-temperature heat exchange medium can first enter the first connecting part 312 from the inlet 3103. Since the battery cells 210 corresponding to the first connecting part 312 for heat exchange are closer to the edge of the box body 100, more heat is dissipated to the external environment, the temperature drops faster, and the higher-temperature heat exchange medium in the first connecting part 312 can not only raise the temperature of the battery cells 210 close to the edge of the box body 100 at the corresponding position, but also make up for the heat loss of the battery cells 210 close to the edge of the box body 100 due to heat dissipation to the external environment, thereby meeting the heating needs. Thus, the temperature difference between the peripheral battery cells 210 close to the edge of the box body 100 and adhered to the first connecting part 312 and the battery cells 210 close to the middle position of the box body 100 (for example, the battery cells 210 corresponding to the heat exchange of the flow channel main body 311 of the first heat exchange flow channel 31a and the battery cells 210 corresponding to the heat exchange of the flow channel main body 311 of the second heat exchange flow channel 31b) can be reduced, and the temperature uniformity between the battery cells 210 can be improved.

[0211] When the battery device 1000 is in the high-temperature cooling working condition, the heat exchange medium can flow into the first connecting part 312, the flow channel main body 311 and the second connecting part 313 in turn. With the flow of the heat exchange medium, the temperature of the heat exchange medium gradually rises, that is, the temperature in the first connecting part 312 < the temperature in the flow channel main body 311 < the temperature in the second connecting part 313. Among them, for the second connecting part, since the second connecting part is arranged closer to the edge of the box body than the flow channel main body of the first heat exchange flow channel, that is, the battery cells 210 corresponding to the second connecting part 313 for heat exchange are closer to the edge of the box body 100 and can dissipate part of the heat to the external environment through the box body 100, the natural heat dissipation is better. At this time, the slightly higher-temperature heat exchange medium in the second connecting part 313 can still meet the heat dissipation needs of the corresponding battery cells 210 close to the edge of the box body 100, thereby reducing the temperature difference between the battery cells 210 close to the edge of the box body 100 and adhered to the second connecting part 313 for heat exchange and the battery cells 210 close to the middle position of the box body 100 (for example, the battery cells 210 corresponding to the heat exchange of the flow channel main body 311 of the first heat exchange flow channel 31a and the battery cells 210 corresponding to the heat exchange of the flow channel main body 311 of the second heat exchange flow channel 31b), and improving the temperature uniformity between the battery cells 210.

[0212] When the first connection portion 312 and the second connection portion 313 are arranged on the same side of the flow passage main body 311 of the first heat exchange flow passage 31a in the width direction of the box body 100, the first connection portion 312 and the second connection portion 313 are arranged side by side. Since the first connection portion 312 and the second connection portion 313 are respectively connected to the inlet 3103 and the outlet 3104 of the second heat exchange flow passage 31b, when in the low-temperature heating working condition, the temperature of the heat exchange medium in the first connection portion 312 is the highest, and the temperature of the heat exchange medium in the second connection portion 313 is the lowest, when in the high-temperature cooling working condition, the temperature of the heat exchange medium in the first connection portion 312 is the lowest, and the temperature of the heat exchange medium in the second connection portion 313 is the highest. For the heat exchange region in contact with the first connection portion 312 and the second connection portion 313 for heat exchange, the battery cell 210 in the heat exchange region is in contact with the first connection portion 312 and the second connection portion 313 for heat exchange at the same time, and at this time, the heat exchange temperature obtained by the heat exchange region is approximately the average temperature of the first connection portion 312 and the second connection portion 313, thereby reducing the probability of local temperature being too high or local temperature being too low in the battery device 1000, and improving the temperature uniformity between the battery cells 210.

[0213] In the above technical solution, the second heat exchange flow passage 31b includes the first connection portion 312 and the second connection portion 313, the first connection portion 312 and the second connection portion 313 are respectively connected to the two ends of the flow passage main body 311 of the second heat exchange flow passage 31b, and the ends away from the flow passage main body 311 of the first connection portion 312 and the second connection portion 313 are respectively formed as the inlet 3103 and the outlet 3104 of the second heat exchange flow passage 31b, thereby the first connection portion 312 and the second connection portion 313 can reduce the temperature difference between the battery cell 210 close to the edge of the box body 100 and in contact with the first connection portion 312 and the second connection portion 313 for heat exchange and the battery cell 210 close to the middle of the box body 100, and can also reduce the probability of local temperature being too high or local temperature being too low in the battery device 1000, and improve the temperature uniformity between the battery cells 210.

[0214] In some embodiments of the present application, as shown in Figure 6 and Figure 5 The first connection portion 312 is closer to the edge of the box body 100 than the second connection portion 313 in the first direction Y.

[0215] That is, in the first direction Y, the distance between the first connection portion 312 and the closest edge of the box body 100 is less than the distance between the second connection portion 313 and the closest edge of the box body 100.

[0216] Further, the first connecting portion 312 is closer to the edge of the box body 100 than the second connecting portion 313 in the second direction X, in other words, the distance between the first connecting portion 312 and the closest edge of the box body 100 is smaller than the distance between the second connecting portion 313 and the closest edge of the box body 100 in the second direction X.

[0217] In some specific examples, the first connecting portion 312 and the second connecting portion 313 are arranged on the same side of the box body 100 in the first direction Y, for example, the first direction Y is the left-right direction, the first connecting portion 312 and the second connecting portion 313 are arranged on the left side of the box body 100, and the distance between the first connecting portion 312 and the left edge of the box body 100 is smaller than the distance between the second connecting portion 313 and the left edge of the box body 100.

[0218] Since the first connecting portion 312 is arranged closer to the edge of the box body 100, the first connecting portion 312 can exchange heat with the battery monomers 210 closer to the edge of the box body 100. And since one end of the first connecting portion 312 is formed as the inlet 3103 of the second heat exchange flow channel 31b, the heat exchange medium entering from the inlet 3103 first enters the first connecting portion 312, then flows into the flow channel body 311, and then flows into the second connecting portion 313. Therefore, in the low-temperature heating working condition, the temperature of the heat exchange flow channel 31 in the first connecting portion 312 is higher, and the battery monomers 210 in heat exchange with the first connecting portion 312 exchange more heat with the environment, so that the high-temperature fluid in the first connecting portion 312 can compensate for the heat loss of the battery monomers 210 and the environment heat exchange, thereby improving the temperature uniformity between the battery monomers 210.

[0219] In the above technical solution, since the first connecting portion 312 is arranged closer to the edge of the box body 100 than the second connecting portion 313 in the first direction Y, and one end of the first connecting portion 312 is formed as the inlet 3103, the first connecting portion 312 can exchange heat with the battery monomers 210 closer to the edge of the box body 100 than the second connecting portion 313, so that the heat exchange medium entering the first connecting portion 312 from the inlet 3103 can compensate for the heat loss of the battery monomers 210 closer to the edge of the box body 100 and the environment heat exchange, thereby improving the temperature uniformity between the battery monomers 210.

[0220] In some embodiments of the utility model, as shown in Figure 6 and Figure 5 The first connecting portion 312 and the second connecting portion 313 are arranged on the same side of the first heat exchange flow channel 31a in the first direction Y.

[0221] For example, the first direction Y is a left-right direction, the first connecting part 312 and the second connecting part 313 can be arranged on the left side of the first heat exchange flow channel 31a, and the first connecting part 312 and the second connecting part 313 can also be arranged on the right side of the first heat exchange flow channel 31a. At this time, for the heat exchange region that is in contact with the first connecting part 312 and the second connecting part 313 for heat exchange, the battery cell 210 in the heat exchange region is in contact with the first connecting part 312 and the second connecting part 313 for heat exchange at the same time, and at this time, the heat exchange temperature obtained by the heat exchange region is approximately the average temperature of the first connecting part 312 and the second connecting part 313, thereby reducing the probability of local temperature being too high or local temperature being too low in the battery device 1000, and improving the temperature uniformity between the battery cells 210.

[0222] In the above technical solution, the first connecting part 312 and the second connecting part 313 are arranged on the same side of the first heat exchange flow channel 31a in the first direction Y, which can facilitate the bending forming of the second heat exchange flow channel 31b, further simplify the arrangement mode of the plurality of heat exchange flow channels 31, compact structure, improve the space utilization rate in the box body 100, and also reduce the probability of local temperature being too high or local temperature being too low in the battery device 1000, and improve the temperature uniformity between the battery cells 210.

[0223] In some embodiments of the utility model, as shown in Figure 6 and Figure 5 , the connection position of the first connecting part 312 and the flow channel body 311 is bent into a quarter circular arc shape; and / or, the connection position of the second connecting part 313 and the flow channel body 311 is bent into a quarter circular arc shape.

[0224] In the above technical solution, the connection position of the first connecting part 312 and the second connecting part 313 and the flow channel body 311 is bent into a quarter circular arc shape, which can make the connection position of the first connecting part 312 and the second connecting part 313 and the flow channel body 311 smooth transition, reduce turbulence and vortex, reduce flow resistance, reduce pressure drop, improve heat exchange efficiency, and also reduce stress concentration at the connection position of the first connecting part 312 and the second connecting part 313 and the flow channel body 311, improve the structural stability and durability of the connection position of the first connecting part 312 and the second connecting part 313 and the flow channel body 311, and improve the service life of the heat exchange assembly 300. In addition, it is also convenient for the processing and forming of the second heat exchange flow channel 31b, and reduces the leakage risk of the connection position of the first connecting part 312 and the second connecting part 313 and the flow channel body 311.

[0225] In some embodiments of the utility model, refer to Figure 6 and Figure 6Each of the heat exchange channels 31 has an inlet 3103 and an outlet 3104, and each of the heat exchange channels 31 extends from the inlet 3103 to the outlet 3104, wherein the ratio of the extension lengths of any two heat exchange channels 31 is 0.8-1.2.

[0226] The extension length of the heat exchange channel 31 refers to the total path length of the heat exchange medium flowing from the inlet 3103 to the outlet 3104 of the heat exchange channel 31 in the flow direction of the heat exchange medium.

[0227] For example, the ratio of the extension lengths of any two heat exchange channels 31 can be 0.8, 0.85, 0.9, 0.95, 1.0, 1.05, 1.1, 1.15, or 1.2.

[0228] In the above technical solution, the ratio of the extension lengths of any two heat exchange channels 31 is set to 0.8-1.2, which can make the extension lengths of any two heat exchange channels 31 relatively close, so that the flow distances of the heat exchange medium in each heat exchange channel 31 are relatively uniform, and the flow resistances in each heat exchange channel 31 are close, thereby making the heat exchange efficiencies of each heat exchange channel 31 uniform, and further improving the temperature uniformity between the battery monomers 210 corresponding to each heat exchange channel 31.

[0229] In some embodiments of the utility model, referring to Figure 5 and Figure 6 , the number of heat exchange channels 31 is two and is respectively a first heat exchange channel 31a and a second heat exchange channel 31b, the inlets 3103 and the outlets 3104 of the two heat exchange channels 31 are located at the same end of the battery device 1000 in the second direction X, and the flow channel main body 311 of the first heat exchange channel 31a is arranged close to the inlet 3103 and the outlet 3104, wherein the ratio of the extension length of the second heat exchange channel 31b to the extension length of the first heat exchange channel 31a is greater than or equal to 1 and less than or equal to 1.2.

[0230] For example, the second direction X is the front-rear direction of the battery device 1000, the heat exchange assembly 300 has two heat exchange channels 31, the inlets 3103 and the outlets 3104 of the two heat exchange channels 31 are arranged at the front end of the battery device 1000, the two heat exchange channels 31 are respectively a first heat exchange channel 31a and a second heat exchange channel 31b, and the flow channel main body 311 of the first heat exchange channel 31a is arranged on the front side of the main body of the second heat exchange channel 31b.

[0231] Further, in the direction extending from the inlet 3103 to the outlet 3104 of the heat exchange channel 31, the ratio of the extension length of the second heat exchange channel 31b to the extension length of the first heat exchange channel 31a is 1-1.2. That is, the extension length of the second heat exchange channel 31b is greater than or equal to the extension length of the first heat exchange channel 31a, and less than or equal to 1.2 times the extension length of the first heat exchange channel 31a.

[0232] For example, the ratio of the extension length of the second heat exchange channel 31b to the extension length of the first heat exchange channel 31a can be 1.02, 1.04, 1.06, 1.08, 1.0, 1.12, 1.14, 1.16, 1.18, or 2.0.

[0233] It should be noted that since the first heat exchange channel 31a and the second heat exchange channel 31b are both bent and extended, and the channel body 311 of the first heat exchange channel 31a is arranged on the front side of the channel body 311 of the second heat exchange channel 31b, and since the inlet 3103 and the outlet 3104 of the first heat exchange channel 31a and the second heat exchange channel 31b are both arranged on the front side of the box body 100, when the extension lengths of the first heat exchange channel 31a and the second heat exchange channel 31b are equal, the total length of the straight pipe section of the second heat exchange channel 31b is greater than the total length of the straight pipe section of the first heat exchange channel 31a, and the number of bends of the first heat exchange channel 31a is greater than the number of bends of the second heat exchange channel 31b. The longer the extension length, the greater the pressure drop and flow resistance, and the more the number of bends, the greater the pressure drop and flow resistance.

[0234] Therefore, the extension length of the second heat exchange channel 31b is greater than or equal to the extension length of the first heat exchange channel 31a and less than or equal to 1.2 times the extension length of the first heat exchange channel 31a, which can make the flow resistance and pressure drop of the heat exchange medium in the first heat exchange channel 31a and the second heat exchange channel 31b relatively uniform, and improve the temperature uniformity between the battery monomers 210 corresponding to the first heat exchange channel 31a and the battery monomers 210 corresponding to the second heat exchange channel 31b.

[0235] In the above technical solution, the ratio of the extension length of the second heat exchange channel 31b to the extension length of the first heat exchange channel 31a is greater than or equal to 1 and less than or equal to 1.2, which can make the flow resistance and pressure drop of the heat exchange medium in the first heat exchange channel 31a and the second heat exchange channel 31b relatively uniform, and improve the temperature uniformity between the battery monomers 210.

[0236] In some embodiments of the present application, the heat exchange pipe 30 is provided with a partition rib (not shown in the figure), which extends along the extension direction of the heat exchange pipe 30 and separates the heat exchange channel 31 into a plurality of sub-channels arranged in parallel.

[0237] For example, the heat exchange pipe 30 is a flat tube or a harmonica tube, and the flat tube and the harmonica tube can be provided with a partition rib extending along the length direction of the flat tube or the harmonica tube. One or a plurality of partition ribs can be arranged in each heat exchange pipe 30 along the width direction of the heat exchange pipe 30, and the one or the plurality of partition ribs can divide the heat exchange flow channel 31 in the flat tube or the harmonica tube into a plurality of sub-flow channels. In this way, the contact area between the heat exchange medium and the pipe wall of the heat exchange pipe 30 can be increased, and the heat exchange efficiency can be improved.

[0238] In some examples, in order to improve the heat exchange efficiency between the heat exchange pipe 30 and the battery cell assembly 200 and increase the heat exchange contact area between the heat exchange pipe 30 and the battery cell 210, the arrangement density of the heat exchange pipe 30 is usually increased. Therefore, when the heat exchange pipe 30 is bent, a smaller bending radius is usually used at the bending position to bend the heat exchange pipe 30, so as to improve the arrangement density of the heat exchange pipe 30. However, when the bending radius of the heat exchange pipe 30 is smaller, the deformation elongation of the heat exchange pipe 30 at the bending position is larger, which affects the structural strength and sealing performance of the heat exchange pipe 30. Therefore, in some examples, the heat exchange pipe 30 is provided with a partition rib extending along the extension direction of the heat exchange pipe 30. The partition rib is arranged in the heat exchange pipe 30, and the two ends of the partition rib are connected to the opposite inner wall surfaces of the heat exchange pipe 30 in the cross section of the heat exchange pipe 30, for example, the partition rib can be connected to the opposite inner wall surfaces of the heat exchange pipe 30 in the thickness direction. In this way, the partition rib can support the inner wall of the heat exchange pipe 30 in the heat exchange pipe 30, improve the structural strength of the heat exchange pipe 30, and improve the anti-deformation ability of the heat exchange pipe 30. Meanwhile, at the bending position of the heat exchange pipe 30, the partition rib can strengthen the structural strength of the bending position of the heat exchange pipe 30, reduce the risk of local strength deficiency of the heat exchange pipe 30 caused by bending, and improve the service life of the heat exchange pipe 30.

[0239] In the above technical solution, since the heat exchange pipe 30 is provided with the partition rib, the partition rib can not only increase the heat exchange area between the heat exchange medium and the heat exchange pipe 30 and improve the heat exchange efficiency, but also improve the structural strength of the heat exchange pipe 30, improve the reliability and stability of the heat exchange assembly 300, strengthen the structural strength of the bending position of the heat exchange pipe 30, reduce the risk of local strength deficiency of the heat exchange pipe 30 caused by bending, and improve the service life of the heat exchange pipe 30.

[0240] In some embodiments of the present application, as shown in Figure 7 The width of the heat exchange flow channel 31 is a first width H1, and the size of the battery cell 210 in the second direction X is a second width H2. The ratio of the first width H1 to the second width H2 is greater than or equal to one-third.

[0241] In some examples, the heat exchange flow channel 31 is defined in the heat exchange pipe 30, and the width of the heat exchange flow channel 31 is the width of the heat exchange pipe 30 or the length of the cross section of the heat exchange pipe 30.

[0242] For example, the ratio of the first width of the heat exchange channel 31 to the second width of the battery cell 210 is 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, and the like.

[0243] In some examples, when the battery cell 210 exchanges heat with the plurality of transverse portions 3101 of the heat exchange channel 31, the sum of the widths of the plurality of transverse portions 3101 that exchange heat with each battery cell 210 in the second direction X is a first heat exchange width, and the ratio of the first heat exchange width to the second width of the battery cell 210 is greater than or equal to one-third. In this way, the heating rate of the heat exchange assembly 300 on the battery cell 210 can be improved, and the temperature rise speed of the battery cell 210 can be improved.

[0244] In the above technical solutions, since the ratio of the first width of the heat exchange channel 31 to the second width of the battery cell 210 is greater than or equal to one-third, not only can the width of the heat exchange channel 31 be increased, the flow area of the heat exchange channel 31 can be increased, the pressure drop of the heat exchange channel 31 can be reduced, and the heat exchange efficiency can be improved, but also the heat exchange area of the heat exchange channel 31 and the battery cell 210 can be increased, the heating rate of the heat exchange assembly 300 on the battery cell 210 can be improved, and the temperature rise speed of the battery cell 210 can be improved.

[0245] In some embodiments of the present application, with reference to Figure 7 and Figure 7 The battery cell 210 has a first wall surface for heat exchange with the heat exchange pipe 30, and the area of the orthographic projection of the heat exchange pipe 30 on the first wall surface is greater than or equal to one-third of the area of the first wall surface.

[0246] The first wall surface of the battery cell 210 cooperating with the heat exchange pipe 30 is the side surface of the battery cell 210 in the third direction Z, specifically, the first wall surface is the outer surface of the shell of the battery cell 210 on one side in the third direction Z. When the heat exchange pipe 30 heats or cools the battery cell 210, heat is transferred from the battery cell 210 to the heat exchange medium in the heat exchange pipe 30 through the first wall surface, or from the heat exchange medium in the heat exchange pipe 30 to the battery cell 210.

[0247] The orthographic projection of the heat exchange pipe 30 on the first wall surface means that the heat exchange pipe 30 is projected on the first wall surface along a direction parallel to the third direction Z. When the heat exchange pipe 30 is a flat tube, the orthographic projection of the heat exchange pipe 30 on the first wall surface is the contact area of the heat exchange pipe 30 and the battery cell 210.

[0248] It can be understood that when the battery monomer 210 is cooled or heated, the greater the heat exchange area of the battery monomer 210 in contact with the heat exchange pipe 30, the faster the cooling or heating speed of the battery monomer 210, under the condition that the fluid temperature of the heat exchange medium is unchanged.

[0249] In the above technical solution, since the heat exchange contact area of the heat exchange pipe 30 with the battery monomer 210 is greater than or equal to one-third of the first wall area, when the heat exchange pipe 30 cools or heats the battery monomer 210, the heat exchange contact area between the heat exchange pipe 30 and each battery monomer 210 can be increased, and the heat exchange rate of the battery monomer 210 can be improved. Therefore, not only can the battery monomer 210 quickly reach the preset temperature range when the battery device 1000 starts to work, but also the battery monomer 210 can be kept in a suitable temperature range during normal work of the battery device 1000, thereby reducing the temperature fluctuation of the battery monomer 210 during work, so that the battery monomer 210 operates more stably, and the battery device 1000 can maintain good performance.

[0250] In some embodiments of the utility model, as shown in Figure 7 The box body 100 includes a bottom plate 110 and an upper cover 120. The upper cover 120 is arranged on the upper side of the bottom plate 110 and cooperates with the bottom plate 110 to define a containing cavity. The battery monomer 210 is arranged in the containing cavity.

[0251] In some examples, the bottom plate 110 and the upper cover 120 are detachably connected. For example, a plurality of first fixing holes are arranged at intervals on the periphery of the bottom plate 110. A plurality of second fixing holes are arranged at intervals on the periphery of the upper cover 120. The bottom plate 110 and the upper cover 120 are fixedly connected by fasteners passing through the first fixing holes and the second fixing holes.

[0252] In some examples, the periphery of the bottom plate 110 is provided with a first flange extending horizontally. The first fixing holes pass through the first flange in the up-down direction. The periphery of the upper cover 120 is provided with a second flange. The second fixing holes pass through the second flange in the up-down direction.

[0253] In some examples, a sealing member 140 is arranged between the bottom plate 110 and the upper cover 120. The sealing member 140 extends along the circumferences of the bottom plate 110 and the upper cover 120 and is sealedly abutted between the first flange of the bottom plate 110 and the second flange of the upper cover 120. The sealing member 140 is used to seal the gap between the bottom plate 110 and the upper cover 120. The sealing member 140 can be a sealing gasket. The sealing member 140 can extend in a ring shape along the circumferences of the bottom plate 110 and the upper cover 120. The sealing member 140 can also include a plurality of sealing segments arranged in sequence or at intervals along the circumferences of the bottom plate 110 and the upper cover 120.

[0254] In some examples, one side edge of the bottom plate 110 in the second direction X is formed with a mounting plate 113 extending towards the upper cover 120, and an edge of the upper cover 120 is formed with a relief hole which is shaped to fit the mounting plate 113, and the mounting plate 113 is fitted into the relief hole. The mounting plate 113 can be provided with a mounting portion, and the number of the mounting portion can be one or more. The mounting portion can be used to fix and mount a pipe joint (for example, a liquid inlet joint and a liquid outlet joint described below), and the pipe joint is used to connect the liquid inlet and the liquid outlet of the heat exchange assembly 300 with an external pipeline. In addition, the mounting portion can also be used to mount a connection terminal, and the connection terminal can be used to electrically connect the battery monomer assembly 200 with an external circuit, and the connection terminal can also be used to electrically connect an electrical element in the box 100 with an external electrical element.

[0255] In the above technical solution, since the box 100 includes the upper cover 120 and the bottom plate 110, and the upper cover 120 and the bottom plate 110 cooperatively define the containing cavity, the upper cover 120 and the bottom plate 110 can play a packaging and protection role on the battery monomer 210. In addition, the box 100 is divided into the upper cover 120 and the bottom plate 110, which can simplify the structure of the box 100, facilitate the processing and molding of the box 100, and facilitate the installation of the parts inside the battery device 1000.

[0256] In some embodiments of the utility model, as shown in Figure 7 The box 100 further includes a mounting beam 130, the mounting beam 130 is arranged in the containing cavity, the mounting beam 130 extends along the second direction X and is arranged on both side edges of the bottom plate 110 in the first direction Y, and the battery monomer assembly 200 is arranged between the two mounting beams 130.

[0257] The battery monomer assembly 200 includes a plurality of column battery monomers 210, and the plurality of battery monomers 210 in each column battery monomer 210 are arranged in a stack along the first direction Y. The two mounting beams 130 are arranged on both sides of the battery monomer assembly 200 in the first direction Y. In this way, the battery monomer assembly 200 can be fixedly connected with the mounting beam 130, and at the same time, the mounting beam 130 can play a limiting role on the plurality of battery monomers 210 in the battery monomer assembly 200, limit the displacement of the battery monomer assembly 200 in the first direction Y, limit the expansion amount of the plurality of battery monomers 210 in the first direction Y, and enable the battery monomer 210 to operate normally.

[0258] In some examples, the mounting beam 130 can be detachably connected with the bottom plate 110, for example, through fastener connection and / or clamping connection. The mounting beam 130 can also be welded and / or adhesively connected with the bottom plate 110.

[0259] In some examples, the mounting beam 130 can be a one-piece to reduce the number of components and improve assembly efficiency. Alternatively, the mounting beam 130 can include a plurality of beam segments that each extend in the second direction X and are sequentially connected in the first direction Y, which reduces the processing difficulty of the mounting beam 130 and improves the processing efficiency.

[0260] In the above technical solution, since the battery monomer assembly 200 is arranged between the two mounting beams 130, the mounting beams 130 not only improve the structural strength of the bottom plate 110 and the structural strength of the box body 100, but also fix the battery monomer assembly 200 to the mounting beams 130, thereby improving the reliability of the battery monomer assembly 200 fixed in the box body 100. In addition, the mounting beams 130 can limit the displacement of the battery monomer assembly 200 in the first direction Y and limit the expansion of the plurality of battery monomers 210 in the first direction Y, thereby improving the stability of the battery device 1000.

[0261] In some embodiments of the utility model, as shown in Figure 2 The heat exchange assembly 300 is arranged in the box body 100.

[0262] The heat exchange assembly 300 can be arranged between the bottom wall of the box body 100 and the battery monomer assembly 200, between the top wall of the box body 100 and the battery monomer assembly 200, between the side wall of the box body 100 and the battery monomer assembly 200, between adjacent battery monomer assemblies 200, or between two adjacent rows of battery monomers 210 in the battery monomer assembly 200.

[0263] In the above technical solution, the heat exchange assembly 300 is arranged in the box body 100, which facilitates direct heat exchange between the heat exchange assembly 300 and the battery monomers 210, reduces heat loss, and improves heat exchange efficiency. In addition, the box body 100 can protect the heat exchange assembly 300, thereby prolonging the service life of the heat exchange assembly 300.

[0264] In some embodiments of the utility model, as shown in Figure 7 The heat exchange assembly 300 includes a plurality of heat exchange pipes 30, each of which defines a heat exchange flow channel 31. The bottom plate 110 of the box body 100 forms a plurality of ribs 111, which cooperatively define a bent and extended accommodation groove 112, and the heat exchange pipes 30 are arranged in the accommodation groove 112.

[0265] For example, the number of ribs 111 on the bottom plate 110 can be four, eight, ten, twelve, fifteen, or more.

[0266] In some examples, the ribs 111 on the bottom plate 110 can be formed by a portion of the bottom plate 110 being raised upward, for example, a plurality of ribs 111 can be punched on the bottom plate 110. The plurality of ribs 111 arranged on the bottom plate 110 can improve the structural strength of the bottom plate 110 and enhance the support stability of the bottom plate 110 to the battery cell assembly 200.

[0267] As shown in Figures 1-7 The plurality of ribs 111 can include a plurality of first ribs 111 extending along the first direction Y and arranged at intervals in the second direction X, and both ends of the first ribs 111 in the first direction Y are arranged away from the mounting beam 130. Further, the plurality of ribs 111 also includes a second rib 111 extending along the second direction X and arranged on one side of the plurality of first ribs 111 in the first direction Y. The accommodation groove 112 is formed between the plurality of first ribs 111, between the first rib 111 and the second rib 111, between the plurality of first ribs 111 and the mounting beam 130, and between the second rib 111 and the mounting beam 130.

[0268] The heat exchange pipe 30 is arranged in the accommodation groove 112, that is, the heat exchange pipe 30 is arranged between the plurality of ribs 111. In this way, the ribs 111 can play a supporting role between the bottom plate 110 and the battery cell assembly 200, reduce the pressure of the battery cell assembly 200 on the heat exchange pipe 30, and improve the reliability of the heat exchange pipe 30. Further, the upper surface of the rib 111 is flush with the upper surface of the heat exchange pipe 30, thereby further reducing the pressure of the battery cell assembly 200 on the heat exchange pipe 30 on the premise of achieving heat exchange between the heat exchange pipe 30 and the battery cell 210, and prolonging the service life of the heat exchange assembly 300.

[0269] In the above technical solution, since the heat exchange pipe 30 of the heat exchange assembly 300 is arranged in the accommodation groove 112 defined by the plurality of ribs 111 on the bottom plate 110, the ribs 111 not only can improve the structural strength of the bottom plate 110 and enhance the support stability of the bottom plate 110 to the battery cell assembly 200, but also can reduce the pressure of the battery cell assembly 200 on the heat exchange pipe 30 and prolong the service life of the heat exchange assembly 300.

[0270] In some embodiments of the present application, the ratio of the length dimension of the box body 100 in the second direction X to the width dimension of the box body 100 in the first direction Y is greater than 2. For example, the outer contour of the box body 100 is a cuboid shape, and the length of the box body 100 is greater than twice the width of the box body 100. For example, the ratio of the length of the box body 100 to the width of the box body 100 can be 2.2, 2.4, 2.6, 2.8, 3, 3.2, 3.5 or 4 and above, etc. At this time, the box body 100 is a long box shape with a length much greater than the width.

[0271] In the above examples, the length to width ratio of the box 100 is greater than 2, which can make the battery device 1000 have a narrower width, reduce the space occupation in the width direction, and facilitate the assembly of the battery device 1000.

[0272] In some embodiments of the present application, the height of the box 100 in the third direction Z is less than 0.3 times the width of the box 100 in the first direction Y, and the third direction Z intersects the first direction Y.

[0273] For example, the outer contour of the box 100 is a cuboid shape, and the height of the box 100 is less than 0.3 times the width of the box. Among them, the height to width ratio of the box 100 can be 0.3, 0.29, 0.28, 0.27, 0.26, 0.25, 0.23, 0.21, 0.2, 0.18 and 0.15, etc. At this time, the box 100 is a low box shape with a height much smaller than the width.

[0274] In the above technical solution, the height to width ratio of the box 100 is less than 0.3, which can make the battery device 1000 have a thinner thickness, facilitate the assembly of the battery device 1000, and reduce the space occupation in the height direction.

[0275] In some embodiments of the present application, with reference to Figure 1 and Figures 1-4 The thickness of the box 100 in the third direction Z is greater than or equal to 20mm and less than or equal to 50mm, and the third direction Z intersects the first direction X.

[0276] For example, the thickness of the box 100 can be 20mm, 25mm, 30m, 35m, 40mm, 45mm or 50mm, etc.

[0277] In the above technical solution, the thickness of the box 100 in the third direction Z is greater than or equal to 20mm and less than or equal to 50mm, which can make the battery device 1000 have a thinner thickness, facilitate the assembly of the battery device 1000, and optimize the position arrangement of the battery device 1000.

[0278] In a second aspect, the embodiments of the present application also provide an electric device 1, which comprises the battery device 1000 of any of the above embodiments.

[0279] In the above technical solution, since the battery device 1000 is arranged on the electric device 1, and the stacking direction of the first surface with the largest area of the plurality of battery monomers 210 in the battery monomer assembly 200 is along the width direction of the box body 100, the plurality of battery monomers 210 in the battery monomer assembly 200 are arranged in a stacked manner along the width direction of the box body 100, so that the number of the battery monomers 210 in the battery monomer assembly 200 can be adjusted to match the width size of the box body 100, the space utilization rate in the width direction of the box body 100 is improved, the energy density of the battery device 1000 is improved, in addition, the design freedom of the width size of the box body 100 of the battery device 1000 is higher, and the installation space requirement of different electric devices 1 can be better matched.

[0280] In some embodiments of the utility model, the electric device 1 is a vehicle, and the second direction X is the front-back direction of the vehicle.

[0281] It should be noted that in the prior art, the battery device 1000 includes a battery module, and the stacking direction of the battery monomers 210 in the battery module is along the front-back direction of the vehicle. When a serpentine-shaped bent water cooling pipe is arranged at the bottom of the battery module, the water cooling pipe is divided into two parts, so that the water cooling flow channel can provide a heat exchange surface for each battery monomer.

[0282] However, when the width of the battery monomer 210 does not match the width of the box body 100 of the battery device 1000, causing the stacking direction of the battery monomers 210 in the battery module to be along the left-right direction of the vehicle, at this time, the water cooling pipe is divided into two parts, which has the following problems: since the water cooling pipe needs to have a certain bending radius, there is at least a spacing of one flow channel width between the flow channels, and the battery monomers 210 arranged between the adjacent flow channels in the left-right direction cannot be directly attached to the flow channels for cooling or heating, thereby easily causing the temperature of the battery monomers 210 in this part to be too high or too low, causing a large temperature difference between the battery monomers 210, which is not conducive to the temperature difference management between the battery monomers 210.

[0283] In the utility model, the length direction of the box body 100 of the battery device 1000 is the second direction X, the second direction X is the front-back direction of the vehicle, the battery monomer assembly 200 in the box body 100 includes a plurality of battery monomers 210, and each column of battery monomers 210 is arranged in a stacked manner along the left-right direction of the vehicle (the thickness direction of the battery monomer 210 is parallel to the left-right direction).

[0284] The heat exchange assembly 300 comprises a plurality of heat exchange flow channels 31, flow channel bodies 311 of the plurality of heat exchange flow channels 31 are arranged in a front-rear arrangement, specifically, the inlets 3103 and the outlets 3104 of the plurality of heat exchange flow channels 31 are both located at the front end of the battery device 1000, each heat exchange flow channel 31 has a flow channel body 311, the plurality of flow channel bodies 311 are arranged in sequence in the front-rear direction, each heat exchange flow channel 31 extends from the front end of the battery device 1000 to the rear along the left and right sides, and then extends to the corresponding flow channel body 311 arrangement area, in the flow channel body 311 arrangement area, the flow channel body 311 extends along the left and right directions in a detour manner to exchange heat with each battery monomer 210, and then gradually extends to the front end of the battery device 1000, so as to improve the temperature uniformity between the battery monomers 210.

[0285] In the above technical solution, the length direction of the battery device 1000 is along the front-rear direction of the vehicle, which facilitates the arrangement of the battery device on the vehicle and facilitates the assembly of the battery device.

[0286] Hereinafter, a vehicle according to one specific embodiment of the present application will be described with reference to the accompanying drawings. ​ A vehicle according to one specific embodiment of the present application will be described with reference to the accompanying drawings.

[0287] With reference to ​ , the vehicle comprises a battery device 1000, and the battery device 1000 is used to provide electric energy for the vehicle.

[0288] Specifically, as ​ indicated, the battery device 1000 comprises a box body 100, a battery monomer assembly 200 and a heat exchange assembly 300, the box body 100 comprises a bottom plate 110 and an upper cover 120, the upper cover 120 is arranged on the upper side of the bottom plate 110 and cooperates with the bottom plate 110 to define a containing cavity, wherein the bottom plate 110 is in the shape of a plate body, the front end of the bottom plate 110 is provided with an upwardly extending mounting plate 113, the upper cover 120 is in the shape of a box body with an open lower side, and the front side edge of the upper cover 120 is formed with a relieved opening which is shaped to match the mounting plate 113, when the upper cover 120 is arranged on the bottom plate 110, the mounting plate 113 covers the relieved opening, and a sealing member 140 is arranged between the upper cover 120 and the bottom plate 110 to seal the gap between the upper cover 120 and the bottom plate 110.

[0289] The box body 100 further comprises mounting beams 130, the mounting beams 130 are arranged in the containing cavity and are fixed to the bottom plate 110, the number of the mounting beams 130 is two, and the two mounting beams 130 extend front-rear and are arranged at positions close to the edges on the left and right sides of the bottom plate 110.

[0290] A plurality of ribs 111 are further formed on the bottom plate 110, the plurality of ribs 111 include a plurality of first ribs 111 and a second rib 111, the plurality of first ribs 111 extend left and right and are arranged in the front and back direction, the second rib 111 extends along the front and back and is arranged on one side of the plurality of ribs 111 in the left and right direction, the plurality of ribs 111, the bottom plate 110 and the mounting beam 130 cooperatively define a receiving groove 112 for accommodating a plurality of heat exchange pipes 30 of the heat exchange assembly 300.

[0291] The battery monomer assembly 200 and the heat exchange assembly 300 are both arranged in the receiving cavity, wherein the number of the battery monomer assembly 200 is a plurality, the plurality of battery monomer assemblies 200 are arranged in sequence along the front and back direction, each battery monomer assembly 200 includes a plurality of columns of battery monomers 210, the plurality of battery monomers 210 are stacked in a column along a first direction Y, the first direction Y is the stacking direction of the first surface of the plurality of battery monomers 210 in each column of battery monomers 210, the first surface is the largest surface among the side surfaces of the battery monomer 210, and the first direction Y is also the width direction of the box body 100, and the plurality of columns of battery monomers 210 are arranged into the battery monomer assembly 200 along a second direction X, the second direction X is the stacking direction of the second surface of the plurality of battery monomers 210, the second surface is the smallest surface among the side surfaces of the battery monomer 210, and the second direction X is also the length direction of the box body 100.

[0292] Among them, the plurality of battery monomer assemblies 200 are arranged between the two mounting beams 130.

[0293] The heat exchange assembly 300 is arranged between the bottom plate 110 and the battery monomer assembly 200, the heat exchange assembly 300 includes a plurality of heat exchange pipes 30, each heat exchange pipe 30 is bent and arranged in the receiving groove 112, and the bending position of the heat exchange pipe 30 is circularly bent, the inner side of each heat exchange pipe 30 defines a heat exchange flow channel 31, at least part of each heat exchange flow channel 31 is formed as a flow channel body 311, and the flow channel bodies 311 of the plurality of heat exchange pipes 30 are arranged in sequence along the front and back direction, and the inlet 3103 and the outlet 3104 of each heat exchange flow channel 31 are arranged on the front side of the battery device 1000.

[0294] Each flow channel body 311 includes a first heat exchange part 3111 and a second heat exchange part 3112, the first heat exchange part 3111 includes two horizontal parts 3101 and a vertical part 3102, the two horizontal parts 3101 extend left and right and are arranged in the front and back direction, the vertical part 3102 extends in the front and back direction and is arranged on one side of the two horizontal parts 3101 in the left and right direction, and the front and back ends of the vertical part 3102 are connected with the end portions of the two horizontal parts 3101 respectively, at this time, the first heat exchange part 3111 is in the shape of U opening to one side in the left and right direction.

[0295] The second heat exchange part 3112 is arranged between the two lateral parts 3101 of the first heat exchange part 3111, and the second heat exchange part 3112 includes a plurality of lateral parts 3101 extending along the left-right direction and arranged at intervals in the front-rear direction, and sequentially connected by bending.

[0296] In some specific examples, the number of heat exchange pipes 30 is two, and the inner side of one heat exchange pipe 30 defines the first heat exchange flow channel 31a, and the inner side of the other heat exchange pipe 30 defines the second heat exchange flow channel 31b. The first heat exchange flow channel 31a is entirely formed as the flow channel body 311, and is arranged on the front side of the flow channel body 311 of the second heat exchange flow channel 31b.

[0297] The second heat exchange flow channel 31b includes a first connecting part 312, a flow channel body 311, and a second connecting part 313 connected in sequence, the first connecting part 312 and the second connecting part 313 both extend along the front-rear direction and are arranged at intervals in the left-right direction, and the first connecting part 312 and the second connecting part 313 are both arranged on one side of the U-shaped opening of the first heat exchange part 3111 of the first heat exchange flow channel 31a.

[0298] The first heat exchange flow channel 31a and the second heat exchange flow channel 31b extend from the corresponding inlets 3103 to the outlets 3104, respectively, and the ratio of the extension length of the second heat exchange flow channel 31b to the extension length of the first heat exchange flow channel 31a is greater than or equal to 1 and less than or equal to 1.2. The width of the heat exchange flow channel 31 is a first width, and the dimension of the battery monomer 210 in the front-rear direction is a second width, and the ratio of the first width to the second width is greater than or equal to one-third. The bottom surface of the battery monomer 210 is a first wall surface matched with the heat exchange pipe 30, and the projection area of the heat exchange pipe 30 on the first wall surface is greater than one-third of the area of the first wall surface. In this way, the temperature rise or cooling rate of the battery monomer 210 can be improved.

[0299] The heat exchange assembly 300 further includes a first sleeve 321 and a second sleeve 322, the first sleeve 321 extends along the left-right direction, and the two ends of the first sleeve 321 are connected to the inlets 3103 of the first heat exchange flow channel 31a and the second heat exchange flow channel 31b, respectively, and the second sleeve 322 extends along the left-right direction, and the two ends of the second sleeve 322 are connected to the outlets 3104 of the first heat exchange flow channel 31a and the second heat exchange flow channel 31b, respectively.

[0300] The heat exchange assembly 300 further includes a liquid inlet pipe 331 and a liquid outlet pipe 332, one end of the liquid inlet pipe 331 is connected to the first sleeve 321 and the other end is connected to a liquid inlet connector, and one end of the liquid outlet pipe 332 is connected to the second sleeve 322 and the other end is connected to a liquid outlet connector, wherein the liquid inlet connector and the liquid outlet connector are both penetrated and fixed on the mounting plate 113 at the front end of the bottom plate 110.

[0301] In the technical solution, each column of the battery monomer 210 in the battery monomer assembly 200 is arranged in a left-right direction, the thickness direction of the battery monomer 210 is along the left-right direction, the plurality of heat exchange channels 31 of the heat exchange pipe 30 are all arranged in a left-right direction after being bent 90 degrees, and gradually extend back to the front end of the battery device 1000, and the flow channel bodies 311 of the plurality of heat exchange channels 31 are arranged in a front-rear direction, so that the heat exchange channels 31 and each battery monomer 210 are in close contact for heat exchange, and the temperature uniformity between the battery monomers 210 is improved.

[0302] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device (1000), characterized in that: include: Box (100); A battery cell assembly (200), the battery cell assembly (200) being disposed in the box (100), the battery cell assembly (200) comprising a plurality of battery cells (210) arranged in a stacked manner, the plurality of battery cells (210) being electrically connected; The stacking direction of the first surfaces of the plurality of battery cells (210) in the battery cell assembly (200) is a first direction (Y), the first direction (Y) is the width direction of the box (100), and the first surface is the surface with the largest area among the side surfaces of the battery cells (210); A heat exchange assembly (300) is used for heat exchange with the battery cell assembly (200), the heat exchange assembly (300) comprising at least two bent and extended heat exchange tubes (30), the heat exchange tubes (30) defining a heat exchange flow channel (31) for conducting a heat exchange medium.

2. The battery device (1000) according to claim 1, characterized in that The battery cell assembly (200) comprises a plurality of rows of battery cells (210), wherein the plurality of battery cells (210) are stacked and arranged in a row along the first direction (Y), and the plurality of rows of battery cells (210) are arranged along the second direction (X) to form the battery cell assembly (200); wherein the second direction (X) is perpendicular to the first direction (Y), and the second direction (X) is the stacking direction of the second surfaces of the plurality of battery cells (210), and the second surface is the surface with the smallest area among the side surfaces of the battery cells (210); The heat exchange assembly (300) is arranged on at least one side of the battery cell assembly (200) in a third direction (Z), and the third direction (Z) is arranged at an angle to the first direction (Y) and the second direction (X).

3. The battery device (1000) according to claim 2, characterized in that At least a portion of the heat exchange channel (31) of any one of the heat exchange tubes (30) forms a channel body (311), and the channel bodies (311) of at least two of the heat exchange tubes (30) are arranged along the second direction (X).

4. The battery device (1000) according to claim 3, characterized in that The heat exchange channel (31) includes a transverse portion (3101) and a longitudinal portion (3102), wherein the longitudinal portion (3102) extends along the second direction (X), and the transverse portion (3101) extends along the first direction (Y), wherein the longitudinal portion (3102) is closer to the edge of the box body (100) than the transverse portion (3101).

5. The battery device (1000) according to claim 4, characterized in that The plurality of transverse portions (3101) in the flow channel body (311) are spaced apart in the first direction (Y) and connected in sequence, and the longitudinal portion (3102) in the flow channel body (311) is connected to at least part of the transverse portions (3101).

6. The battery device (1000) according to claim 3, characterized in that The flow channel body (311) includes: a first heat exchange part (3111) and a second heat exchange part (3112), the first heat exchange part (3111) is bent and extended to define a U-shaped area, the second heat exchange part (3112) is bent and arranged in the U-shaped area, and the second heat exchange part (3112) is bent and connected to one end of the first heat exchange part (3111).

7. The battery device (1000) according to claim 6, characterized in that The second heat exchange portion (3112) includes a plurality of transverse portions (3101), the plurality of transverse portions (3101) extending along the first direction (Y) and arranged at intervals in the second direction (X), and the plurality of transverse portions (3101) of the second heat exchange portion (3112) are connected in sequence along the second direction (X).

8. The battery device (1000) according to claim 7, characterized in that The connection position of the two adjacent transverse portions (3101) of the first heat exchange portion (3111) is bent into a semicircular arc shape.

9. The battery device (1000) according to claim 6, characterized in that The first heat exchange portion (3111) includes: two transverse portions (3101) and one longitudinal portion (3102), the two transverse portions (3101) extending along the first direction (Y) and arranged at intervals in the second direction (X), and the longitudinal portion (3102) extending along the first direction (Y) and connected between the two transverse portions (3101).

10. The battery device (1000) according to claim 9, characterized in that The connection positions between the two transverse portions (3101) and the longitudinal portion (3102) of the first heat exchange portion (3111) are both bent into a quarter arc shape.

11. The battery device (1000) according to claim 3, characterized in that The inlets (3103) and outlets (3104) of the plurality of heat exchange channels (31) are all located at the same end of the battery device (1000) in the second direction (X).

12. The battery device (1000) according to claim 11, characterized in that The inlets (3103) of the plurality of heat exchange channels (31) are all connected, and the outlets (3104) of the plurality of heat exchange channels (31) are all connected.

13. The battery device (1000) according to claim 11, characterized in that The plurality of heat exchange channels (31) include a first heat exchange channel (31a) and a second heat exchange channel (31b), wherein the channel body (311) of the first heat exchange channel (31a) is located closest to the inlet (3103) and the outlet (3104). The second heat exchange channel (31b) further comprises: a first connection portion (312) and a second connection portion (313); the first connection portion (312), the channel body (311) and the second connection portion (313) are connected in sequence; an end of the first connection portion (312) away from the channel body (311) forms the inlet (3103); an end of the second connection portion (313) away from the channel body (311) forms the outlet (3104); and both the first connection portion (312) and the second connection portion (313) extend along the second direction (X).

14. The battery device (1000) according to claim 13, characterized in that The first connection portion (312) is closer to the edge of the box (100) in the first direction (Y) than the second connection portion (313).

15. The battery device (1000) according to claim 13, characterized in that The first connecting portion (312) and the second connecting portion (313) are arranged on the same side of the first heat exchange channel (31a) in the first direction (Y).

16. The battery device (1000) according to claim 13, characterized in that The connection position between the first connection portion (312) and the flow channel body (311) is bent into a quarter arc shape; and / or, The connection position between the second connection portion (313) and the flow channel body (311) is bent into a quarter arc shape.

17. The battery device (1000) according to claim 3, characterized in that Each of the heat exchange channels (31) has an inlet (3103) and an outlet (3104), and each of the heat exchange channels (31) extends from the inlet (3103) to the outlet (3104), wherein the ratio of the extension lengths of any two of the heat exchange channels (31) is 0.8-1.

2.

18. The battery device (1000) according to claim 17, characterized in that The number of the heat exchange flow channels (31) is two, namely a first heat exchange flow channel (31a) and a second heat exchange flow channel (31b); the inlets (3103) and outlets (3104) of the two heat exchange flow channels (31) are both located at the same end of the battery device (1000) in the second direction (X); the flow channel body (311) of the first heat exchange flow channel (31a) is arranged close to the inlet (3103) and the outlet (3104); Wherein, the ratio of the extension length of the second heat exchange channel (31b) to the extension length of the first heat exchange channel (31a) is greater than or equal to 1 and less than or equal to 1.

2.

19. The battery device (1000) according to claim 2, characterized in that The width of the heat exchange channel (31) is a first width, the dimension of the battery cell (210) in the second direction (X) is a second width, and the ratio of the first width to the second width is greater than or equal to one third.

20. The battery device (1000) according to claim 2, characterized in that The battery cell (210) has a first wall surface for cooperating with the heat exchange tube (30) for heat exchange, and taking the first wall surface as a projection surface, the area of ​​the orthographic projection of the heat exchange tube (30) on the first wall surface is greater than or equal to one third of the area of ​​the first wall surface.

21. The battery device (1000) according to claim 1, characterized in that The box body (100) comprises a bottom plate (110) and an upper cover (120); the upper cover (120) is arranged on the upper side of the bottom plate (110) and cooperates with the bottom plate (110) to define a receiving cavity; the battery cell (210) is arranged in the receiving cavity.

22. The battery device (1000) according to claim 21, characterized in that The box body (100) further includes: a mounting beam (130), the mounting beam (130) being arranged in the accommodating cavity, the mounting beam (130) extending along a second direction (X) and being arranged on both side edges of the bottom plate (110) in a first direction (Y), and the battery cell assembly (200) being arranged between two mounting beams (130).

23. The battery device (1000) according to claim 1, characterized in that The heat exchange component (300) is disposed in the box (100).

24. The battery device (1000) according to claim 23, characterized in that The bottom plate (110) of the box body (100) is formed with a plurality of convex ribs (111), and the plurality of convex ribs (111) cooperate to define a bent and extended receiving groove (112), and the heat exchange tube (30) is arranged in the receiving groove (112).

25. An electrical device (1), characterized in that: A battery device (1000) comprising any one of claims 1-24.

Images