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; the heat exchange assembly comprises a plurality of heat exchange flow channels which are connected in parallel, inlets and outlets of the heat exchange flow channels are arranged at the same end of the battery device in the first direction, the first direction is the length direction of the battery device, at least part of each heat exchange flow channel forms a flow channel body, and the flow channel bodies are sequentially arranged in the first direction. And the quantity of the battery monomers attached to the at least two runner main bodies for heat exchange is different. According to the technical scheme, the temperature difference between the battery monomers at different positions in the battery device can be reduced, the uniform temperature performance of the battery device is improved, the number of the battery monomers attached to each runner main body for heat exchange can be set according to the heat exchange requirements of the battery monomers in different heat exchange areas, and the heat exchange efficiency of the battery device is improved. And the heat exchange efficiency of the battery monomers in the corresponding heat exchange areas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] In existing technology, to ensure the proper operation and service life of a battery device, a heat exchanger and battery cells are typically installed within the device. The heat exchanger exchanges heat with the battery cells to regulate their temperature, thereby extending the life of the battery device. However, due to the large number of battery cells in current battery devices, the temperature uniformity among the multiple cells needs to be further improved. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery device and an electrical device incorporating the battery device, which can reduce temperature differences between battery cells at different locations within the battery device and improve temperature uniformity of the battery device.

[0004] In the first aspect, an embodiment of the present invention provides a battery device, comprising: a box body; a battery cell assembly, the battery cell assembly is arranged in the box body, and the battery cell assembly includes a plurality of battery cells; a heat exchange assembly, the heat exchange assembly is used for heat exchange with the battery cells, the heat exchange assembly includes a plurality of heat exchange channels, the plurality of heat exchange channels are connected in parallel, the inlets and outlets of the plurality of heat exchange channels are arranged at the same end of the battery device in a first direction, the first direction is the length direction of the battery device, at least a portion of each heat exchange channel is formed as a channel body, the plurality of channel bodies are arranged in sequence along the first direction, and the number of battery cells that are fitted for heat exchange with at least two channel bodies is different.

[0005] In the above technical solution, since the heat exchange channel is formed with a channel body, the channel bodies of multiple heat exchange channels are arranged along the length direction of the battery device, and the inlets and outlets of multiple heat exchange channels are all located at the same end of the battery device in the first direction. In this way, not only can the inlets and outlets of multiple heat exchange channels be centrally arranged, the structure and layout of external pipelines are simplified, the difficulty of installation and maintenance is reduced, and the space occupancy is reduced, different channel bodies can also exchange heat with different areas of the battery device in the length direction, reduce the temperature difference between battery cells at different positions of the battery device in the length direction, improve the temperature uniformity of the battery device in the length direction, improve the temperature uniformity between the battery cells corresponding to the heat exchange channels, improve the temperature uniformity between the battery cells at the edge of the box and the battery cells near the middle area of ​​the box, and improve the temperature uniformity of the battery device. At the same time, by making the number of battery cells for heat exchange in contact with at least two flow channel bodies different, the number of battery cells for heat exchange in contact with each flow channel body can be set according to the heat exchange requirements of the battery cells in different heat exchange areas, thereby improving the heat exchange efficiency of the battery cells in the corresponding heat exchange area. The number of battery cells for heat exchange can also be set according to the extended length of the flow channel body, thereby meeting the heat exchange requirements of each battery cell and improving the temperature uniformity performance between the battery cells.

[0006] In some embodiments, in a direction along the first direction and gradually away from the inlet and the outlet, the number of battery cells that the plurality of flow channel bodies are in contact with for heat exchange decreases.

[0007] In the above technical solution, since the number of battery cells that the multiple channel bodies are in contact with for heat exchange decreases in the direction gradually away from the inlet and outlet of the heat exchange channel, the extension lengths of the multiple channel bodies can be reduced successively or in a step-by-step manner, so that the extension lengths of the multiple heat exchange channels are roughly consistent, thereby making the pressure drop and flow resistance of the multiple heat exchange channels roughly consistent, thereby improving the heat exchange uniformity of the multiple heat exchange channels and improving the temperature uniformity between the battery cells.

[0008] In some embodiments, in a direction along the first direction and gradually away from the inlet and the outlet, the number of battery cells that the multiple flow channel bodies are in contact with for heat exchange decreases successively.

[0009] In the above technical solution, since the number of battery cells that are in contact with the heat exchange of the multiple flow channel bodies decreases successively along the first direction and gradually away from the inlet and the outlet, the extension lengths of the multiple heat exchange flow channels can be further made consistent, thereby improving the heat exchange uniformity between the multiple heat exchange flow channels and further improving the temperature uniformity between the battery cells.

[0010] In some embodiments, at least two flow channel bodies have different heat exchange contact areas with the battery cell assembly.

[0011] In the above technical solution, because the heat exchange contact areas between at least two flow channel bodies and the battery cell assembly differ, the heat exchange contact area between each flow channel body and the battery cell assembly can be adjusted based on the heat exchange requirements of the battery cells in different heat exchange areas, thereby improving the heat exchange efficiency of the battery cells in different heat exchange areas and enhancing the temperature uniformity between the various heat exchange areas. Furthermore, the heat exchange contact area with the battery cell assembly can be adjusted based on the extension length of each flow channel body, thereby meeting the heat exchange requirements of each battery cell and improving the temperature uniformity between the battery cells.

[0012] In some embodiments, in a direction along the first direction and gradually away from the inlet and the outlet, the heat exchange contact area between the plurality of flow channel bodies and the battery cell assembly decreases.

[0013] In the above technical solution, since the heat exchange contact area between the multiple flow channel bodies and the battery cell assembly decreases in the direction gradually away from the inlet and outlet of the heat exchange flow channel, the length of the multiple flow channel bodies can be reduced, and the extension length of the multiple heat exchange flow channels can be roughly consistent, so that the pressure drop and flow resistance of the multiple heat exchange flow channels are roughly consistent, thereby improving the heat exchange uniformity of the multiple heat exchange flow channels and improving the temperature uniformity between the battery cells.

[0014] In some embodiments, in a direction along the first direction and gradually away from the inlet and the outlet, the heat exchange contact area between the plurality of flow channel bodies and the battery cell assembly gradually decreases.

[0015] In the above technical solution, since the heat exchange contact area between the multiple flow channel bodies and the battery cell assembly gradually decreases along the first direction and gradually away from the inlet and outlet, the extension length of the multiple flow channel bodies can be gradually reduced, and the extension length of the multiple heat exchange flow channels can be further made consistent, thereby improving the heat exchange uniformity between the multiple heat exchange flow channels and further improving the temperature uniformity between the battery cells.

[0016] In some embodiments, at least two flow channel bodies have different outer contour widths in the first direction.

[0017] In the above technical solution, at least two flow channel bodies have different outer contour widths in the first direction. Therefore, according to different heat exchange requirements, the battery device can be divided into multiple heat exchange areas with different widths along the first direction, and the flow channel bodies with different outer contour widths in the first direction are arranged to match the corresponding heat exchange areas, thereby improving the heat exchange efficiency of the battery cells in different heat exchange areas and improving the temperature uniformity between the battery cells.

[0018] In some embodiments, in a direction along the first direction and gradually away from the inlet and the outlet, the outer contour widths of the plurality of flow channel bodies in the first direction become smaller.

[0019] In the above technical solution, since the outer contour width of the multiple channel bodies in the first direction becomes smaller in the direction gradually away from the inlet and outlet of the heat exchange channel, the extension length of the multiple channel bodies can be reduced in the direction gradually away from the inlet and outlet, so that the extension length of the multiple heat exchange channels is roughly consistent, so that the pressure drop and flow resistance of the multiple heat exchange channels are roughly consistent, thereby improving the heat exchange uniformity of the multiple heat exchange channels and improving the temperature uniformity between the battery cells.

[0020] In some embodiments, in a direction along the first direction and gradually away from the inlet and the outlet, the outer contour widths of the plurality of flow channel bodies in the first direction decrease sequentially.

[0021] In the above technical solution, since the outer contour widths of the multiple flow channel bodies in the first direction decrease successively along the first direction and gradually away from the inlet and the outlet, the extension lengths of the multiple flow channel bodies can be gradually reduced, and the extension lengths of the multiple heat exchange flow channels can be further made consistent, thereby improving the heat exchange uniformity between the multiple heat exchange flow channels and further improving the temperature uniformity between the battery cells.

[0022] In some embodiments, the number of heat exchange channels is two, and the heat exchange channels include a first heat exchange channel and a second heat exchange channel. The channel body of the first heat exchange channel is arranged closest to the inlet and the outlet, and the ratio of the outer contour width of the channel body of the second heat exchange channel in the first direction to the total outer contour width of all battery cell assemblies of the battery device in the first direction is greater than or equal to 1 / 3 and less than 1 / 2.

[0023] In the above technical solution, by making the ratio of the outer contour width of the channel body of the second heat exchange channel in the first direction to the total outer contour width of all battery cell assemblies in the first direction greater than or equal to 1 / 3 and less than 1 / 2, the extension length of the first heat exchange channel and the extension length of the second heat exchange channel can be made substantially the same, thereby making the flow resistance and pressure drop of the first heat exchange channel and the second heat exchange channel tend to be consistent, improving the consistency of the heat exchange efficiency of the first heat exchange channel and the second heat exchange channel, and thus improving the heat exchange uniformity between the first heat exchange channel and the second heat exchange channel.

[0024] In some embodiments, the number of heat exchange channels is two, namely the first heat exchange channel and the second heat exchange channel. The channel body of the first heat exchange channel is arranged close to the inlet and the outlet, and each heat exchange channel extends from the inlet to the outlet, wherein 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.

[0025] 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, thereby improving the temperature uniformity between the battery cells.

[0026] In some embodiments, the multiple heat exchange channels include a first heat exchange channel and a second heat exchange channel, and the channel body of the first heat exchange channel is arranged closest to the inlet and the outlet, wherein the second heat exchange channel also includes: a first connection part and a second connection part, the first connection part, the channel body and the second connection part are connected in sequence, the first connection part forms an inlet at one end away from the channel body, and the second connection part forms an outlet at one end away from the channel body; wherein the first connection part and the second connection part both extend along the first direction.

[0027] In the above technical solution, the second heat exchange channel includes a first connection part and a second connection part, which are respectively connected to the two ends of the channel body of the second heat exchange channel, and the ends of the first connection part and the second connection part away from the channel body are respectively formed as the inlet and outlet of the second heat exchange channel. Therefore, the first connection part and the second connection part can reduce the temperature difference between the battery cells close to the edge of the box and in contact with the first connection part and the second connection part for heat exchange and the battery cells close to the middle of the box, and can also reduce the probability of local excessive temperature or local excessive temperature in the battery device, thereby improving the temperature uniformity between the battery cells.

[0028] In some embodiments, the first connection portion is closer to the edge of the box body in a second direction than the second connection portion, and the second direction intersects with the first direction.

[0029] In the above technical solution, since the first connection part is arranged closer to the edge of the box body in the second direction than the second connection part, and one end of the first connection part is formed as an inlet, the first connection part can exchange heat with the battery cell closer to the edge of the box body than the second connection part, so that the heat exchange medium entering the first connection part from the inlet can compensate for the heat loss of the battery cell closer to the edge of the box body and the environment, thereby improving the temperature uniformity between the battery cells.

[0030] In some embodiments, the first connecting portion and the second connecting portion are arranged on the same side of the first heat exchange channel in the second direction.

[0031] In the above technical solution, the first connecting portion and the second connecting portion are arranged on the same side of the first heat exchange channel in the second direction, which can make it easier to bend and form the second heat exchange channel, further simplify the arrangement of multiple heat exchange channels, and provide a compact structure, thereby improving the space utilization rate within the box. It can also reduce the probability of local over-temperature or local over-temperature in the battery device, thereby improving the temperature uniformity between battery cells.

[0032] In some embodiments, the inlets of the plurality of heat exchange channels are all connected, and the outlets of the plurality of heat exchange channels are all connected.

[0033] In the above technical solution, the inlets and outlets of multiple heat exchange channels are all connected, which not only can achieve uniform distribution of the heat exchange medium in multiple heat exchange channels and improve the temperature uniformity of the battery device, but also can reduce flow resistance, improve heat exchange efficiency, and reduce the risk of thermal runaway of the battery device.

[0034] In some embodiments, the heat exchange channel includes a transverse portion and a longitudinal portion, the longitudinal portion extends along a first direction, and the transverse portion extends along a second direction, where the second direction is the width direction of the battery device; wherein the longitudinal portion is closer to the edge of the box than the transverse portion.

[0035] In the above technical solution, because the longitudinal portion is closer to the edge of the case than the transverse portion, the longitudinal portion can exchange heat with the peripheral battery cells near the edge of the case among the multiple battery cells, and the transverse portion can exchange heat with the battery cells near the middle of the case. When the heat exchange medium flows into the longitudinal and transverse portions in sequence, it can compensate for the internal and external temperature difference caused by heat exchange with the surrounding environment between the peripheral battery cells near the edge of the case and the battery cells near the middle of the case, making the heat exchange effect of the peripheral battery cells near the edge of the case and the battery cells near the middle of the case more consistent, improving the temperature uniformity of the battery device, and thus, to a certain extent, increasing the service life of the battery device. In addition, the heat exchange channel includes a longitudinal portion extending along a first direction and a transverse portion extending along a second direction, which can simplify the structure of the heat exchange channel and facilitate its processing and layout.

[0036] In some embodiments, a plurality of transverse portions in the flow channel body are spaced apart in the first direction and connected in sequence, and a longitudinal portion in the flow channel body is connected to at least some of the transverse portions.

[0037] In the above technical solution, since the multiple transverse parts of the flow channel body are connected in sequence and the longitudinal parts are connected to a part or all of the transverse parts, the multiple transverse parts can increase the arrangement density of the flow channel body in the length direction of the battery device, thereby improving the heat exchange efficiency and uniformity with the battery cells. The longitudinal parts are arranged at a position closer to the edge of the box and connected to the transverse parts. The longitudinal parts can exchange heat with the peripheral battery cells near the edge of the box, increase the heat exchange area with the peripheral battery cells, and improve the temperature uniformity of the battery device.

[0038] 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 extended to define a U-shaped area, the second heat exchange part is bent and arranged in the U-shaped area, and the second heat exchange part is bent and connected to one end of the first heat exchange part.

[0039] In the above technical solution, since the first heat exchange portion of the flow channel body is bent and extended into a U shape, the second heat exchange portion is bent and arranged inside the first heat exchange portion, and the first heat exchange portion is bent and connected to the second heat exchange portion, the structure of the flow channel body can be compacted, the flow channel length of the flow channel body and the heat exchange area with the battery cell can be increased, the flow time of the heat exchange medium in the flow channel body can be extended, the heat exchange efficiency can be improved, and the temperature uniformity between the battery cells in the area where the flow channel body is located can be improved.

[0040] In some embodiments, the second heat exchange portion includes multiple transverse portions, which extend along the second direction and are arranged at intervals in the first direction. The second direction is the width direction of the battery device. The multiple transverse portions of the second heat exchange portion are bent and connected in sequence along the first direction.

[0041] In the above technical solution, the second heat exchange part includes multiple transverse parts, which can increase the heat exchange area of ​​the second heat exchange part, improve the heat exchange efficiency, evenly distribute the heat of the second heat exchange part, and improve the temperature uniformity between the battery cells. In addition, the multiple transverse parts are bent and connected in sequence, which can simplify the structure of the second heat exchange part and facilitate the processing and forming of the second heat exchange part.

[0042] In some embodiments, the first heat exchange portion includes: two transverse portions and one longitudinal portion, the two transverse portions extend along the second direction and are arranged at intervals in the first direction, the second direction is the width direction of the battery device, and the longitudinal portion extends along the first direction and is connected between the two transverse portions.

[0043] In the above technical solution, since the first heat exchange part includes two transverse parts and a longitudinal part connected between the two transverse parts, the second heat exchange part can be conveniently surrounded on the inside, simplifying the structure of the first heat exchange part, facilitating the processing and forming of the first heat exchange part, and improving production efficiency.

[0044] In some embodiments, the heat exchange assembly includes a plurality of heat exchange tubes, each of which bends and extends to define a heat exchange channel.

[0045] In the above technical solution, since the heat exchange assembly includes multiple heat exchange tubes, each of which bends and extends to define a heat exchange channel, this not only reduces the complexity of the heat exchange channel molding process, thereby increasing the production rate of the heat exchange assembly, but also reduces the fluid pressure drop within a single heat exchange tube, improving heat exchange efficiency. It also achieves uniform temperature transfer of the heat exchange medium, improving temperature uniformity between battery cells. Furthermore, compared to a plate-like structure, a tubular structure is simpler, less expensive, and easier to manufacture.

[0046] In some embodiments, the battery cell assembly includes multiple columns of battery cells, multiple battery cells are stacked in a row along the second direction, and multiple columns of battery cells are arranged into a battery cell assembly along the first direction. The heat exchange assembly is arranged on at least one side of the battery cell assembly in the third direction, the second direction is the width direction of the battery device, and the first direction, the second direction and the third direction are arranged at an angle to each other.

[0047] In the above technical solution, by making the battery cell assembly include multiple columns of battery cells, multiple battery cells are stacked in a row along the second direction, and multiple columns of battery cells are arranged into a battery cell assembly along the first direction, the width size of the box (that is, the size of the box in the second direction) can be adapted more flexibly, and the space in the width direction of the box can be fully utilized to improve the energy density of the battery device. At the same time, by arranging the heat exchange assembly on one side of the battery cell assembly in the third direction, and arranging multiple flow channel bodies along the first direction, 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. It is also convenient to arrange the flow channel body to extend back and forth along the width direction of the box, so that the flow channel body is in contact with each battery cell in the corresponding heat exchange area for heat exchange, reducing the risk of local excessive temperature or excessive low temperature due to the battery cell not contacting the flow channel body in the corresponding heat exchange area, thereby improving the temperature uniformity between the battery cells.

[0048] In some embodiments, the width of the heat exchange channel is a first width, the size of the battery cell in the first direction is a second width, and the ratio of the first width to the second width is greater than or equal to one third.

[0049] In the above technical solution, since the ratio of the first width of the heat exchange channel to the second width of the battery cell is greater than or equal to one third, it is possible not only to increase the width of the heat exchange channel, increase the flow cross-sectional area of ​​the heat exchange channel, reduce the pressure drop of the heat exchange channel, and improve the heat exchange efficiency, but also to increase the heat exchange area between the heat exchange channel and the battery cell, increase the heating rate of the heat exchange component to the battery cell, and increase the temperature rise rate of the battery cell.

[0050] In some embodiments, the heat exchange assembly includes multiple heat exchange tubes, each heat exchange tube defines a heat exchange flow channel, and the battery cell has a first wall surface that cooperates with the heat exchange tube for heat exchange. Taking the first wall surface as the projection surface, the area of ​​the positive projection of the heat exchange tube on the first wall surface is greater than or equal to one third of the area of ​​the first wall surface.

[0051] In the above technical solution, since the heat exchange contact area between the heat exchange tube and the battery cell is greater than or equal to one-third of the area of ​​the first wall, when the heat exchange tube cools or heats the battery cell, the heat exchange contact area between the heat exchange tube and each battery cell can be increased, thereby improving the heat exchange rate of the battery cell. In this way, not only can the battery cell quickly reach a preset temperature range when the battery device starts working, but the battery cell can also be kept within an appropriate temperature range during the normal operation of the battery device, reducing the temperature fluctuation of the battery cell during operation, thereby making the battery cell operation more stable and allowing the battery device to maintain good performance.

[0052] In some embodiments, a ratio of a length dimension of the box in a first direction to a width dimension of the box in a second direction is greater than 2, and the first direction intersects the second direction.

[0053] In the above technical solution, since the ratio of the length to the width of the box is greater than 2, the flow channel bodies of the multiple heat exchange channels are arranged along the length direction of the battery device, which can make the battery device have a narrower width, reduce the space occupied in the width direction, and facilitate the assembly of the battery device. It can reduce the temperature difference between the battery cells in the box and improve the temperature uniformity between the battery cells.

[0054] In some embodiments, the ratio of the width of the box in the second direction to the height of the box in the third direction is less than 0.3, and the first direction, the second direction and the third direction intersect with each other.

[0055] In the above technical solution, since the ratio of the box body height to width is less than 0.3, the battery device can be made thinner, which is beneficial for the assembly of the battery device and reduces the space occupied in the height direction.

[0056] In some embodiments, the thickness of the box body in the third direction is greater than or equal to 20 mm and less than or equal to 50 mm, and the third direction intersects with the first direction.

[0057] In the above technical solution, the thickness of the box in the third direction is greater than or equal to 20 mm and less than or equal to 50 mm, which can make the battery device thinner, facilitate the assembly of the battery device, and optimize the position layout of the battery device.

[0058] In a second aspect, an embodiment of the present invention provides an electrical device comprising the battery device according to the first aspect of the present invention.

[0059] In the above embodiment, by setting the battery device of the first aspect, the heat exchange flow channel of the battery device is formed with a flow channel body, the flow channel bodies of the plurality of heat exchange flow channels are arranged along the length direction of the battery device, and the inlets and outlets of the plurality of heat exchange flow channels are located at the same end of the battery device in the first direction. In this way, the inlets and outlets of the plurality of heat exchange flow channels can be concentratedly arranged, the structure and layout of the external pipeline are simplified, the installation and maintenance difficulty is reduced, the space occupation is reduced, different flow channel bodies can exchange heat with different regions of the battery device in the length direction, the temperature difference between the battery monomers at different positions of the battery device in the length direction is reduced, the temperature uniformity of the battery device in the length direction is improved, the temperature uniformity between the battery monomers corresponding to the heat exchange of each heat exchange flow channel is improved, the temperature uniformity between the battery monomers at the edge position of the box body and the battery monomers close to the middle region of the box body is improved, and the temperature uniformity of the battery device is improved. At the same time, by making the number of battery monomers adhered and exchanged by at least two flow channel bodies different, the number of battery monomers adhered and exchanged by each flow channel body can be set according to the heat exchange demand of the battery monomers in different heat exchange regions, the heat exchange efficiency of the battery monomers in the corresponding heat exchange region is improved, and the number of battery monomers adhered and exchanged by the flow channel body can be set according to the extension length of the flow channel body, so that the heat exchange demand of each battery monomer is met, the temperature uniformity between the battery monomers is improved, and the overall performance of the electric device is improved.

[0060] In some embodiments, the electric device is a vehicle, and the first direction is the front-rear direction of the vehicle.

[0061] In the above technical solution, the length direction of the battery device is along the front-rear direction of the vehicle, which facilitates the arrangement of the battery device on the vehicle and the assembly of the battery device.

[0062] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0063] Figure 1 is a structural schematic view of a vehicle according to an embodiment of the present application;

[0064] Figure 2 is a structural schematic view of a battery device according to an embodiment of the present application;

[0065] Figure 3 is an exploded view of a battery device according to an embodiment of the present application, only the upper cover is exploded;

[0066] Figure 4 is an exploded view of a battery device according to an embodiment of the present application;

[0067] Figure 5is a schematic diagram of multiple battery cell assemblies and a heat exchange assembly of a battery device according to an embodiment of the present utility model;

[0068] Figure 6 yes Figure 5 A partial enlarged view of the battery cell assembly and the heat exchange assembly shown in FIG;

[0069] Figure 7 FIG. 4 is an exploded view of a battery device according to an embodiment of the present invention from another angle.

[0070] Reference numerals:

[0071] 1. Electrical devices;

[0072] 1000, battery device; 2000, controller; 3000, motor;

[0073] 100, box body;

[0074] 110, bottom plate; 111, rib; 112, receiving groove; 113, mounting plate;

[0075] 120, upper cover; 130, mounting beam; 140, sealing member;

[0076] 200, battery cell assembly; 210, battery cell;

[0077] 300, heat exchange component;

[0078] 30. Heat exchange tube;

[0079] 31, heat exchange channel; 31a, first heat exchange channel; 31b, second heat exchange channel;

[0080] 3101, horizontal part; 3102, vertical part; 3103, inlet; 3104, outlet;

[0081] 311, flow channel body; 3111, first heat exchange part; 3112, second heat exchange part;

[0082] 312, first connecting portion; 313, second connecting portion;

[0083] 321, first sleeve; 322, second sleeve; 331, liquid inlet pipe; 332, liquid outlet pipe;

[0084] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0085] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0086] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this invention; the terms "including" and "having" and any variations thereof in the specification and claims of this invention and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0087] In the description of the embodiments of this utility model, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of this utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0088] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0089] In the description of the embodiments of the present invention, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0090] In the description of the embodiments of the present invention, the term "plurality" refers to more than two (including two).

[0091] In the description of the embodiments of the present invention, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0092] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections, or electrical connections; direct connections, or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0093] The battery apparatus mentioned in the embodiments of the present invention may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include one or more battery cells. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or hybrid via a busbar.

[0094] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is a battery module formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0095] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0096] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0097] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0098] As an example, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to house the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0099] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0100] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0101] In some embodiments, the battery device refers to an energy storage device, which includes a box with a door on at least one side. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0102] The battery cells mentioned in the embodiments of the present invention may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of the present invention are not limited to this. The battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of the present invention are not limited to this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of the present invention are not limited to this.

[0103] For example, a battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and electrolyte, and is provided with at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive and negative electrode sheets and separators.

[0104] The technical solutions described in the embodiments of the present invention are applicable to various electrical devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0105] In related art, to ensure that a battery device operates within a suitable temperature range, a heat exchange assembly is typically provided to exchange heat with the battery cells of the battery device to regulate the temperature of the battery cells. In related art, battery devices contain a large number of battery cells, and the temperature differences between the battery cells are significant, affecting the overall performance of the battery device. Therefore, improving the temperature uniformity between the battery cells in the battery device remains a technical problem to be solved.

[0106] Based on the above considerations, and to improve temperature uniformity among multiple battery cells within a battery device, the present invention designs a battery device in which a heat exchange assembly is disposed within a housing for heat exchange with the battery cell assembly. The heat exchange assembly includes multiple heat exchange channels arranged in parallel, with the inlets and outlets of the multiple heat exchange channels disposed at the same end of the battery device in a first direction. Each heat exchange channel has a channel body, and the multiple channel bodies are arranged along the length of the housing. At least two channel bodies are configured to exchange heat with different numbers of battery cells. Thus, the inlets and outlets of the multiple heat exchange channels are centrally disposed, simplifying the structure and layout of external piping, reducing installation and maintenance difficulties, and reducing space usage. Different channel bodies can also exchange heat with different areas of the battery device, thereby improving temperature uniformity at different locations within the battery device. Furthermore, by varying the number of battery cells to be exchanged with at least two channel bodies, the number of battery cells to be exchanged with can be adjusted based on the extended length of the channel body, thereby meeting the heat exchange requirements of each battery cell and further improving temperature uniformity among the battery cells.

[0107] The present invention provides an electrical device that uses the battery device of the present disclosure as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0108] For the convenience of description, the following embodiments take the electric device 1 as a vehicle as an example to introduce the structures of the electric device 1 and the battery device 1000 of the present invention in detail.

[0109] Please refer to Figure 1 , Figure 1 The power-consuming device 1 provided for some embodiments of the present invention is a structural schematic diagram of a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery device 1000, and the battery device 1000 can be arranged at the bottom, head or tail of the vehicle. The battery device 1000 can be used to power the vehicle, for example, the battery device 1000 can be used as an operating power source for the vehicle. The vehicle may also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery device 1000 to power the motor 3000, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present invention, the battery device 1000 can not only serve as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0110] Reference below Figure 2-Figure 7 A battery device 1000 according to an embodiment of the first aspect of the present invention is described. Figure 2 is a schematic structural diagram of a battery device 1000 according to an embodiment of the present utility model; Figure 3 This is an exploded view of the battery device 1000 according to an embodiment of the present invention, with only the upper cover 120 exploded; Figure 4 is an exploded view of a battery device 1000 according to an embodiment of the present invention; Figure 5 is a schematic diagram of a plurality of battery cell assemblies 200 and a heat exchange assembly 300 of a battery device 1000 according to an embodiment of the present invention; Figure 6 yes Figure 5 A partial enlarged view of the battery cell assembly 200 and the heat exchange assembly 300 shown in FIG; Figure 7 FIG. 1 is an exploded view of the battery device 1000 according to an embodiment of the present invention from another angle.

[0111] For ease of description, the length of the battery device 1000 is defined as the first direction X, the width of the battery device 1000 is defined as the second direction Y, and the height of the battery device 1000 is defined as the third direction Z. In a specific example, the length of the battery device 1000 (i.e., the first direction X) may be the front-to-back direction of the vehicle (electrical device 1), the width of the battery device 1000 (i.e., the second direction Y) may be the left-to-right direction of the vehicle (electrical device 1), and the height of the battery device 1000 (i.e., the third direction Z) may be the up-down direction of the vehicle (electrical device 1). The first direction X, the second direction Y, and the third direction Z are mutually perpendicular.

[0112] The present invention provides a battery device 1000, such as Figure 2-Figure 7As shown in

[0113] As shown in Figure 2 and Figure 3 The box 100 defines a containing cavity, the battery cell assembly 200 is arranged in the containing cavity of the box 100, and the heat exchange assembly 300 can be arranged in the containing cavity of the box 100 or outside the box 100. In some examples, the box 100 can be an aluminum alloy piece, so as to reduce the weight of the box 100 and improve the energy density of the battery device 1000 under the premise of meeting the structural strength of the box 100.

[0114] In other examples, the box 100 can also be a composite material piece, and the composite material of the box 100 can be selected from materials with high strength, light weight and good corrosion resistance.

[0115] Referring to Figure 2 and Figure 3 The battery cell assembly 200 includes a plurality of battery cells 210, and the plurality of battery cells 210 of the battery cell assembly 200 can be arranged in sequence along the length direction, the width direction and / or the thickness direction of the battery cell 210. The battery cell assembly 200 can include two, four, six, ten, twelve, eighteen, twenty-four, thirty or more battery cells 210. It should be noted that the number of battery cells 210 in the embodiments of the present application includes but is not limited to the above-mentioned several implementation manners. Any two battery cells 210 in the plurality of battery cells 210 in the battery cell assembly 200 can be connected in series or in parallel.

[0116] Referring to Figure 4The heat exchange assembly 300 is used to exchange heat with the battery cell 210. For example, the heat exchange assembly 300 can be directly attached to the battery cell 210 for heat exchange, or the heat exchange assembly 300 can be attached to the battery cell 210 at intervals for heat exchange. The heat exchange assembly 300 may include a cold plate, which may define a heat exchange channel 31. The heat exchange assembly 300 may also include a heat exchange tube 30, which may define a heat exchange channel 31. The heat exchange channel 31 is used to conduct a heat exchange medium. The heat exchange medium may be a liquid, for example, water or a mixture of water and other liquids. As the heat exchange medium flows along the heat exchange channel 31, the heat exchange medium may remove heat generated by the battery cell 210 or the heat exchange medium may heat the battery cell 210.

[0117] The number of heat exchange channels 31 of the heat exchange assembly 300 can be two, three, four, five, six, seven, eight or more, etc.

[0118] The multiple heat exchange channels 31 are connected in parallel, i.e., 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. This allows the flow rate of the heat exchange medium in each heat exchange channel 31 to be consistent, achieving uniform heat exchange for the battery cells 210. Furthermore, the pressure drop in a single heat exchange channel 31 can be reduced, thereby improving heat exchange efficiency.

[0119] The flow channel body 311 of the heat exchange flow channel 31 refers to: a flow channel assembly formed by the centralized arrangement of at least a majority of the flow channels in the heat exchange flow channel 31. The heat exchanged between the heat exchange medium in the flow channel body 311 and the battery cells 210 is greater than the heat exchanged between the heat exchange medium in the remaining flow channels of the heat exchange flow channel 31 excluding the flow channel body 311 and the battery cells 210. Furthermore, the heat exchange contact area between the flow channel body 311 and the battery cells 210 is greater than the heat exchange contact area between the remaining flow channels of the heat exchange flow channel 31 excluding the flow channel body 311 and the battery cells 210.

[0120] In some examples, along the flow direction of the heat exchange medium, the total extended length within the flow channel body 311 is greater than the total extended length of the remaining flow channels of the heat exchange channel 31 except the flow channel body 311, and the flow time of the heat exchange medium in the flow channel body 311 is greater than the flow time of the heat exchange medium in the remaining flow channels of the heat exchange channel 31 except the flow channel body 311.

[0121] In some examples, each heat exchange channel 31 has a channel body 311. For a heat exchange channel 31, only a part of the heat exchange channel 31 can be formed as the channel body 311, or all the channels of the heat exchange channel 31 can be formed as the channel body 311 together.

[0122] Among them, multiple heat exchange channels 31 have multiple channel bodies 311. Among the multiple channel bodies 311, at least two channel bodies 311 are arranged along the first direction X. That is to say, a part of the multiple channel bodies 311, such as two, three or four channel bodies 311, can be arranged along the length direction of the battery device 1000, or all the channel bodies 311 among the multiple channel bodies 311 can be arranged in sequence along the length direction of the battery device 1000.

[0123] For example, when multiple heat exchange channels 31 are formed as a channel body 311 as a whole, the multiple heat exchange channels 31 can be arranged along the length direction of the battery device 1000. When multiple heat exchange channels 31 are partially formed as the channel body 311, the channel bodies 311 of the multiple heat exchange channels 31 are arranged along the length direction of the battery device 1000.

[0124] In the present invention, the first 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. In this way, the multiple battery cells 210 can be divided into multiple regions along the length direction of the battery device 1000. One or more flow channel bodies 311 of heat exchange flow channels 31 are arranged in each region for heat exchange with the battery cells 210 in the region. This is beneficial to improving the temperature uniformity of the battery device 1000 in the length direction.

[0125] Since the multiple heat exchange channels 31 of the present invention all form a channel body 311, and the channel body 311 is arranged more concentratedly than the channels of other parts of the heat exchange channel 31, the channel body 311 can undertake more heat exchange functions in the heat exchange channel 31. Therefore, by limiting the arrangement direction of the channel body 311 in different heat exchange channels 31, it is possible to achieve precise control of the heat exchange efficiency between different heat exchange channels 31 and the corresponding heat exchange areas, and by setting the arrangement direction of the channel body 311 in the heat exchange channel 31 to be along the length direction of the box body 100, it is possible to improve the heat exchange efficiency between the heat exchange channel 31 and the battery cell 210 in the box body 100 while meeting the compact arrangement of the battery cell 210 in the box body 100.

[0126] like Figure 5As shown, the inlets 3103 and the outlets 3104 of the plurality of heat exchange channels 31 are both located at the same end of the battery device 1000 in the first direction X. For example, the first direction X is the front-rear direction of the battery device 1000, and the inlets 3103 and the outlets 3104 of the plurality of heat exchange channels 31 can be arranged at the front end of the battery device 1000 or at the rear end of the battery device 1000. In this way, the inlets 3103 and the outlets 3104 of the plurality of heat exchange channels 31 can be arranged in a concentrated manner, so that the plurality of heat exchange channels 31 can be connected to the external pipeline in a concentrated manner, the structure and layout of the external pipeline are simplified, the installation and maintenance difficulty is reduced, the arrangement space of the inlets 3103, the outlets 3104 and the external pipeline is reduced, the structure is compact, the space occupation is reduced, and the space utilization is improved.

[0127] In addition, since the inlets 3103 and the outlets 3104 of the plurality of heat exchange channels 31 are arranged at one end in 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 in the length direction of the box body 100. In this way, not only is it beneficial to concentrate the input of the heat exchange medium to the plurality of heat exchange channels 31, but also the temperature and flow of the heat exchange medium entering the inlets 3103 of each heat exchange channel 31 tend to be 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.

[0128] 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 inlets 3103 and the outlets 3104 of the plurality of heat exchange channels 31 are arranged at one end in the length direction of the box body 100. Therefore, the channel bodies 311 arranged at intervals with the inlets 3103 and the outlets 3104 in the length direction of the box body 100 need to be connected to the inlets 3103 and the outlets 3104 through the channel sections (for example, the first connecting portion and the second connecting portion described below). In this way, the channel sections connected between the channel bodies 311 and the inlets 3103 and the outlets 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.

[0129] The flow channel body 311 closest to the inlet 3103 and the outlet 3104 is set as the first flow channel body, and the flow channel body 311 arranged on the side of the first flow channel body away from the inlet 3103 and the outlet 3104 is set as the second flow channel body. Since the flow channel body 311 is a collection of flow channels arranged together in the heat exchange flow channel 31, when the second flow channel body is connected to the inlet 3103 and the outlet 3104 through the flow channel section, the flow channel section can only be arranged on one side of the first flow channel body in the width direction of the box body 100. Therefore, The flow channel section connected to the inlet 3103 and the outlet 3104 can be arranged closer to the edge of the box body 100. In this way, under heating conditions, the higher temperature heat exchange medium entering from the inlet 3103 can exchange heat with the battery cells 210 near the edge of the box body 100 to compensate for the heat lost by the battery cells 210 near the edge of the box body 100 due to heat dissipation to the environment, thereby improving the temperature uniformity between the battery cells 210 at the edge of the box body 100 and the battery cells 210 near the middle area of ​​the box body 100.

[0130] In addition, when the flow channel section connected to the inlet 3103 and the second flow channel body and the flow channel section connected to 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 adjacent and arranged side by side, and since the two flow channel sections are respectively connected to the inlet 3103 and the outlet 3104 of the heat exchange channel, the temperature difference is maximum. At this time, the heat exchange temperature of the two flow channel sections and the corresponding heat exchange area can be approximated to the average temperature of the two flow channel sections. In this way, the probability of local temperature being too high or too low in the battery device 1000 can be reduced, and the temperature uniformity performance between the battery cells 210 can be improved.

[0131] The number of battery cells 210 that the at least two flow channel bodies 311 are in contact with for heat exchange is different. Specifically, the flow channel body 311 extends on the surface of the battery cell assembly 200. The number of battery cells 210 that the flow channel body 311 is in contact with for heat exchange is, that is, the number of battery cells 210 that the flow channel body 311 passes through when extending from one end to the other end along the direction of fluid flow.

[0132] For example, among multiple flow channel bodies 311, only two or more of the flow channel bodies 311 may have different numbers of battery cells 210 for heat exchange, while the remaining flow channel bodies 311 may have the same number of battery cells 210 for heat exchange, or all of the flow channel bodies 311 may have different numbers of battery cells 210 for heat exchange.

[0133] Since the plurality of flow channel bodies 311 are arranged in sequence along the first direction X, the heat exchange regions corresponding to each flow channel body 311 are also arranged in sequence along the first direction X. The heat exchange requirements of the battery monomers 210 are different for different heat exchange regions arranged along the first direction X, and therefore the number of battery monomers 210 to which each flow channel body 311 is attached for heat exchange can be set according to the heat exchange requirements of the battery monomers 210 of different heat exchange regions, thereby improving the heat exchange efficiency of the battery monomers 210 of the corresponding heat exchange region and improving the temperature uniformity between the heat exchange regions.

[0134] In addition, since the inlets 3103 and outlets 3104 of the plurality of heat exchange channels 31 are arranged at the same end of the battery device 1000 in the first direction X, the lengths of the flow channel segments (such as the first connecting portion 312 and the second connecting portion 313 described below) used by the flow channel bodies 311 to connect the inlets 3103 and the outlets 3104 are different for different heat exchange channels 31, and the extension lengths of the plurality of flow channel bodies 311 along the fluid flow direction can also be different, so that the number of battery monomers 210 to which at least two flow channel bodies 311 are attached for heat exchange is different, and the number of battery monomers 210 to which the flow channel body 311 is attached for heat exchange can be set according to the extension length of the flow channel body 311, so that the heat exchange requirements of each battery monomer 210 can be met, and the temperature uniformity between the battery monomers 210 is improved.

[0135] In the above technical solution, since the heat exchange flow channel 31 is formed with the flow channel body 311, the flow channel bodies 311 of the plurality of heat exchange flow channels 31 are arranged along the length direction of the battery device 1000, and 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 first direction X. In this way, not only can the inlets 3103 and the outlets 3104 of the plurality of heat exchange flow channels 31 be concentratedly arranged, the structure and layout of the external pipeline are simplified, the installation and maintenance difficulty is reduced, the space occupation is reduced, different flow channel bodies 311 can also exchange heat with different regions of the battery device 1000 in the length direction, the temperature difference between the battery monomers 210 at different positions of the battery device 1000 in the length direction is reduced, the temperature uniformity of the battery device 1000 in the length direction is improved, the temperature uniformity between the battery monomers 210 corresponding to the heat exchange of each heat exchange flow channel 31 is 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 region of the box body 100 is improved, and the temperature uniformity of the battery device 1000 is improved. At the same time, by making the number of battery monomers 210 corresponding to the heat exchange of at least two flow channel bodies 311 different, the number of battery monomers 210 corresponding to the heat exchange of each flow channel body 311 can be set according to the heat exchange demand of the battery monomers 210 in different heat exchange regions, the heat exchange efficiency of the battery monomers 210 in the corresponding heat exchange region is improved, and the number of battery monomers 210 corresponding to the heat exchange of each flow channel body 311 can also be set according to the extension length of the flow channel body 311, so as to meet the heat exchange demand of each battery monomer 210 and improve the temperature uniformity between the battery monomers 210.

[0136] In some embodiments of the present application, refer to Figure 5 In the first direction X and gradually away from the inlet 3103 and the outlet 3104, the number of battery monomers 210 corresponding to the heat exchange of the plurality of flow channel bodies 311 decreases.

[0137] For example, the first direction X is the front-back direction, the inlet 3103 and the outlet 3104 of the heat exchange flow channel 31 are arranged on the front side of the battery device 1000, and the number of battery monomers 210 corresponding to the heat exchange of the plurality of flow channel bodies 311 can be reduced in a stepped manner or sequentially in the front-back direction.

[0138] As the distance between the multiple channel bodies 311 and the inlet 3103 and outlet 3104 gradually increases in the direction gradually away from the heat exchange channel 31, the length of the channel section connected between the multiple channel bodies 311 and the inlet 3103 and outlet 3104 gradually increases. On the premise that the extension length of each heat exchange channel 31 is roughly the same, the length that the multiple channel bodies 311 can extend gradually decreases, and the number of battery cells 210 that the multiple channel bodies 311 are in contact with for heat exchange is reduced, thereby improving the heat exchange efficiency of a single battery cell 210 and improving the temperature uniformity between the battery cells 210.

[0139] In the above technical solution, since the number of battery cells 210 that are in contact with the heat exchange by the multiple channel bodies 311 decreases in the direction gradually away from the inlet 3103 and the outlet 3104 of the heat exchange channel 31, the extension lengths of the multiple channel bodies 311 can be reduced successively or in a step-by-step manner, so that the extension lengths of the multiple heat exchange channels 31 are roughly consistent, thereby making the pressure drop and flow resistance of the multiple heat exchange channels 31 roughly consistent, thereby improving the heat exchange uniformity of the multiple heat exchange channels 31 and improving the temperature uniformity between the battery cells 210.

[0140] In some embodiments of the present invention, referring to Figure 5 In the direction along the first direction X and gradually away from the inlet 3103 and the outlet 3104 , the number of battery cells 210 that the multiple flow channel bodies 311 are in contact with for heat exchange decreases successively.

[0141] In the above technical solution, since the number of battery cells 210 that are in contact with the heat exchange of the multiple flow channel bodies 311 decreases successively along the first direction X and gradually away from the inlet 3103 and the outlet 3104, the extension lengths of the multiple heat exchange flow channels 31 can be further made consistent, thereby improving the heat exchange uniformity between the multiple heat exchange flow channels 31 and further improving the temperature uniformity between the battery cells 210.

[0142] In some embodiments of the present invention, referring to Figure 5 , the heat exchange contact areas between at least two flow channel bodies 311 and the battery cell assembly 200 are different.

[0143] For example, the heat exchange assembly 300 includes a heat exchange tube 30, which defines a heat exchange channel 31. The channel body 311 of the heat exchange channel 31 extends on one side surface of the battery cell assembly 200 in the third direction Z. The area where the heat exchange tube 30 defines the contact between the tube section of the channel body 311 and the battery cell assembly 200 is the heat exchange contact area between the channel body 311 and the battery cell assembly 200.

[0144] For example, among the plurality of flow channel bodies 311, only two or more flow channel bodies 311 can have different heat exchange contact areas with the battery cell assembly 200, the rest of the flow channel bodies 311 can have the same heat exchange contact area with the battery cell assembly 200, or all the flow channel bodies 311 can have different heat exchange contact areas with the battery cell assembly 200.

[0145] In the above technical solution, since at least two flow channel bodies 311 have different heat exchange contact areas with the battery cell assembly 200, the heat exchange contact area of each flow channel body 311 with the battery cell assembly 200 can be set according to the heat exchange requirements of the battery cells 210 in different heat exchange areas, thereby improving the heat exchange efficiency of the battery cells 210 in different heat exchange areas and improving the temperature uniformity between different heat exchange areas. In addition, the heat exchange contact area with the battery cell assembly 200 can also be set according to the extension length of each flow channel body 311, so as to meet the heat exchange requirements of each battery cell 210 and improve the temperature uniformity between the battery cells 210.

[0146] In some embodiments of the present application, refer to Figure 5 In the direction along the first direction X and gradually away from the inlet 3103 and the outlet 3104, the heat exchange contact area of the plurality of flow channel bodies 311 with the battery cell assembly 200 decreases.

[0147] For example, the first direction X is the front-rear direction, and the inlet 3103 and the outlet 3104 of the heat exchange flow channel 31 are arranged on the front side of the battery device 1000. In the direction from front to back, the heat exchange contact area of the plurality of flow channel bodies 311 with the battery cell assembly 200 can be reduced in steps or sequentially.

[0148] In the above technical solution, since the heat exchange contact area of the plurality of flow channel bodies 311 with the battery cell assembly 200 decreases in the direction gradually away from the inlet 3103 and the outlet 3104 of the heat exchange flow channel 31, the length of the plurality of flow channel bodies 311 can be reduced, and the extension length of the plurality of heat exchange flow channels 31 is substantially consistent, thereby making the pressure drop and flow resistance of the plurality of heat exchange flow channels 31 substantially consistent, thereby improving the heat exchange uniformity of the plurality of heat exchange flow channels 31 and improving the temperature uniformity between the battery cells 210.

[0149] In some embodiments of the present application, refer to Figure 5 In the direction along the first direction X and gradually away from the inlet 3103 and the outlet 3104, the heat exchange contact area of the plurality of flow channel bodies 311 with the battery cell assembly 200 decreases.

[0150] In the above technical solution, since the heat exchange contact area between the multiple flow channel bodies 311 and the battery cell assembly 200 gradually decreases along the first direction X and gradually away from the inlet 3103 and the outlet 3104, the extension length of the multiple flow channel bodies 311 can be gradually reduced, and the extension length of the multiple heat exchange flow channels 31 can be further made consistent, thereby improving the heat exchange uniformity between the multiple heat exchange flow channels 31 and further improving the temperature uniformity between the battery cells 210.

[0151] In some embodiments of the present invention, referring to Figure 5 , the outer contour widths of at least two flow channel bodies 311 in the first direction X are different.

[0152] The outer contour width of the flow channel body 311 in the first direction X refers to the distance between the edge of one end of the flow channel body 311 and the edge of the other end of the flow channel body 311 in the first direction X. Among the multiple flow channel bodies 311, only two or more of the flow channel bodies 311 may have different outer contour widths in the first direction X, while the outer contour widths of the remaining flow channel bodies 311 in the first direction X may be the same. Alternatively, the outer contour widths of all the flow channel bodies 311 in the first direction X may be different.

[0153] Since at least two flow channel bodies 311 have different outer contour widths in the first direction X, when the flow channel bodies 311 are arranged with approximately the same spacing, the wider the outer contour width of the flow channel body 311, the longer the length of the flow channel body 311, and the larger the heat exchange contact area with the battery cell assembly 200. In this way, according to the heat exchange requirements of the battery cells 210 at different positions along the length direction of the battery device 1000, a plurality of heat exchange areas with different widths along the length direction of the battery device 1000 can be divided, and the flow channel bodies 311 with different outer contour widths in the first direction X are arranged to match the corresponding heat exchange areas, thereby improving the heat exchange efficiency of the battery cells 210 in different heat exchange areas.

[0154] In the above technical solution, at least two flow channel bodies 311 have different outer contour widths in the first direction X. Therefore, according to different heat exchange requirements, the battery device 1000 can be divided into multiple heat exchange areas with different widths along the first direction X, and the flow channel bodies 311 with different outer contour widths in the first direction X are arranged to match the corresponding heat exchange areas, thereby improving the heat exchange efficiency of the battery cells 210 in different heat exchange areas and improving the temperature uniformity between the battery cells 210.

[0155] In some embodiments of the present invention, referring to Figure 5 , in a direction along the first direction X and gradually away from the inlet 3103 and the outlet 3104 , the outer contour widths of the plurality of flow channel bodies 311 in the first direction X become smaller.

[0156] For example, the first direction X is a front-rear direction, the inlet 3103 and the outlet 3104 of the heat exchange flow channel 31 are arranged on the front side of the battery device 1000, and the outer profile width of the plurality of flow channel bodies 311 in the first direction X can be reduced in steps or sequentially in the direction from front to back.

[0157] In the above technical solution, since the outer profile width of the plurality of flow channel bodies 311 in the first direction X decreases in the direction gradually away from the inlet 3103 and the outlet 3104 of the heat exchange flow channel 31, the extension length of the plurality of flow channel bodies 311 can be reduced in the direction gradually away from the inlet 3103 and the outlet 3104, so that the extension lengths of the plurality of heat exchange flow channels 31 are substantially consistent, thereby making the pressure drop and flow resistance of the plurality of heat exchange flow channels 31 substantially consistent, and improving the heat exchange uniformity of the plurality of heat exchange flow channels 31 and the temperature uniformity between the battery monomers 210.

[0158] In some embodiments of the utility model, refer to Figure 5 In the direction along the first direction X and gradually away from the inlet 3103 and the outlet 3104, the outer profile width of the plurality of flow channel bodies 311 in the first direction X decreases sequentially.

[0159] In the above technical solution, since the outer profile width of the plurality of flow channel bodies 311 in the first direction X decreases sequentially in the direction along the first direction X and gradually away from the inlet 3103 and the outlet 3104, the extension length of the plurality of flow channel bodies 311 can be gradually reduced, and the extension lengths of the plurality of heat exchange flow channels 31 are further made consistent, thereby improving the heat exchange uniformity between the plurality of heat exchange flow channels 31 and further improving the temperature uniformity between the battery monomers 210.

[0160] In some embodiments of the utility model, refer to Figure 5 The number of heat exchange flow channels 31 is two, the heat exchange flow channel 31 includes a first heat exchange flow channel 31a and a second heat exchange flow channel 31b, the flow channel body 311 of the first heat exchange flow channel 31a is arranged closest to the inlet 3103 and the outlet 3104, and the ratio of the outer profile width of the flow channel body 311 of the second heat exchange flow channel 31b in the first direction X to the total outer profile width of all battery monomer assemblies 200 in the first direction X is greater than or equal to 1 / 3 and less than 1 / 2.

[0161] For example, in the first direction X, the ratio of the outer profile width of the flow channel body 311 of the second heat exchange flow channel 31b to the total outer profile width of all battery monomer assemblies 200 can be 0.34, 0.36, 0.38, 0.4, 0.42, 0.44, 0.46, 0.48 or 0.5.

[0162] Furthermore, the ratio of the outer width of the channel body 311 of the first heat exchange channel 31a in the first direction X to the total outer width of all the battery cell assemblies 200 in the first direction X may be greater than 1 / 2 and less than or equal to 2 / 3. For example, in the first direction X, the ratio of the outer width of the channel body 311 of the first heat exchange channel 31a to the total outer width of all the battery cell assemblies 200 may be 0.52, 0.54, 0.56, 0.58, 0.6, 0.62, 0.64, or 0.66.

[0163] Since the channel body 311 of the first heat exchange channel 31a is arranged close to the inlet 3103 and the outlet 3104, and the channel body 311 of the second heat exchange channel 31b is arranged on the side of the first heat exchange channel 31a away from the inlet 3103 and the outlet 3104 in the first direction X, the channel body 311 of the second heat exchange channel 31b needs to be connected to the inlet 3103 and the outlet 3104 through a channel section extending along the first direction X.

[0164] In the above technical solution, by making the ratio of the outer contour width of the channel body 311 of the second heat exchange channel 31b in the first direction X to the total outer contour width of all battery cell assemblies 200 in the first direction X greater than or equal to 1 / 3 and less than 1 / 2, the extension length of the first heat exchange channel 31a and the extension length of the second heat exchange channel 31b can be made substantially the same, so that the flow resistance and pressure drop of the first heat exchange channel 31a and the second heat exchange channel 31b tend to be consistent, thereby improving the consistency of the heat exchange efficiency of the first heat exchange channel 31a and the second heat exchange channel 31b, thereby improving the heat exchange uniformity between the first heat exchange channel 31a and the second heat exchange channel 31b.

[0165] In some embodiments of the present invention, referring to Figure 5 There are two heat exchange channels 31, namely the first heat exchange channel 31a and the second heat exchange channel 31b. The inlet 3103 and the outlet 3104 of the two heat exchange channels 31 are both located at the same end of the battery device 1000 in the first direction X. The channel 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.

[0166] For example, the first direction X is the front-to-back direction, the heat exchange assembly 300 has two heat exchange channels 31, the inlet 3103 and the outlet 3104 of the two heat exchange channels 31 are both arranged at the front end of the battery device 1000, the two heat exchange channels 31 are respectively the first heat exchange channel 31a and the second heat exchange channel 31b, and the channel body 311 of the first heat exchange channel 31a is arranged on the front side of the second heat exchange channel 31b body.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] In some embodiments of the present application, with reference to Figure 5, multiple heat exchange channels 31 include a first heat exchange channel 31a and a second heat exchange channel 31b, the 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 also includes: a first connection part 312 and a second connection part 313, the first connection part 312, the channel body 311 and the second connection part 313 are connected in sequence, the end of the first connection part 312 away from the channel body 311 forms an inlet 3103, and the end of the second connection part 313 away from the channel body 311 forms an outlet 3104; wherein, the first connection part 312 and the second connection part 313 both extend along the first direction X.

[0173] Among them, 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 multiple, the channel bodies of the multiple second heat exchange channels 31b are arranged in sequence along the first direction X.

[0174] For example, the inlets 3103 and outlets 3104 of multiple heat exchange channels 31 are all arranged at the front end of the battery device 1000, and the channel bodies 311 of multiple heat exchange channels 31 are all arranged on the rear side of the inlets 3103 and outlets 3104, and are arranged in sequence along the front-to-back direction, wherein the channel body 311 of the first heat exchange channel 31a is located at the front of the multiple channel bodies 311, and the channel body 311 of the second heat exchange channel 31b is arranged on the rear side of the channel body 311 of the first heat exchange channel 31a.

[0175] Furthermore, for the first heat exchange channel 31a, the entire channel of the first heat exchange channel 31a is the channel body 311, and both ends of the channel body 311 respectively form the inlet 3103 and the outlet 3104 of the first heat exchange channel 31a.

[0176] For the second heat exchange channel 31b, the channel body 311 of the second heat exchange channel 31b is arranged on 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 on the front side of the first heat exchange channel 31a, the second heat exchange channel 31b also includes a first connection part 312 and a second connection part 313. The rear end of the first connection part 312 and the rear end of the second connection part 313 are respectively connected to the two ends of the channel body 311. The front end of the first connection 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 connection 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.

[0177] In the first direction X, the first connection portion 312 may extend along a straight line, a curve and / or a broken line, and the second connection portion 313 may extend along a straight line, a curve and / or a broken line.

[0178] In some specific examples, the first connection portion 312 includes a transverse portion 3101 and a longitudinal portion 3102. One end of the longitudinal portion 3102 of the first connection portion 312 is connected to one end of the flow channel body 311 of the second heat exchange channel 31b. The other end of the longitudinal portion 3102 of the first connection portion 312 extends in a straight line toward the inlet 3103 and the outlet 3104 in the first direction X. The transverse portion 3101 of the first connection portion 312 extends along the second direction Y. One end of the transverse portion 3101 of the first connection portion 312 is connected to the other end of the longitudinal portion 3102 of the first connection portion 312. The other end of the transverse portion 3101 of the first connection portion 312 forms the inlet 3103 of the second heat exchange channel 31b. Furthermore, the transverse portion 3101 and the longitudinal portion 3102 of the first connection portion 312 are arranged perpendicular to each other, and the connection between the transverse portion 3101 and the longitudinal portion 3102 of the first connection portion 312 is bent into a quarter-circular arc shape.

[0179] In some specific examples, the second connecting portion 313 includes a transverse portion 3101 and a longitudinal portion 3102. One end of the longitudinal portion 3102 of the second connecting portion 313 is connected to the other end of the flow channel body 311 of the second heat exchange channel 31b. The other end of the longitudinal portion 3102 of the second connecting portion 313 extends in a straight line in the first direction X toward the inlet 3103 and the outlet 3104. The transverse portion 3101 of the second connecting portion 313 extends along the second direction Y. One end of the transverse portion 3101 of the second connecting portion 313 is connected to the other end of the longitudinal portion 3102 of the second connecting portion 313. The other end of the transverse portion 3101 of the second connecting portion 313 forms the outlet 3104 of the second heat exchange channel 31b. Furthermore, the transverse portion 3101 and the longitudinal portion 3102 of the second connecting portion 313 are arranged perpendicular to each other, and the connection between the transverse portion 3101 and the longitudinal portion 3102 of the second connecting portion 313 is bent into a quarter-circular arc shape.

[0180] The first connection portion 312 and the second connection portion 313 may be located on the same side of the first heat exchange channel 31a in the second direction Y, and the first connection portion 312 and the second connection portion 313 may be located on both sides of the second heat exchange channel 31b in the second direction Y respectively.

[0181] When the heat exchange medium flows into the second heat exchange channel 31b, the heat exchange medium first enters the first connection part 312 from the inlet 3103, flows into the channel body 311 through the first connection part 312, then flows into the second connection part 313, and finally flows out from the outlet 3104. The heat exchange medium flowing through the first connection part 312, the channel body 311 and the second connection part 313 exchanges heat with the battery cell 210, so that the battery cell 210 operates within an appropriate temperature range.

[0182] Among them, since the inlet 3103 and the outlet 3104 are located at one end of the box body 100 in the first direction X, and the channel body 311 of the second heat exchange channel 31b is located on the side of the channel body 311 of the first heat exchange channel 31a away from the inlet 3103 and the outlet 3104, at this time, in order to realize the connection between the inlet 3103 and the outlet 3104 and the channel body 311 of the second heat exchange channel 31b, the first connection part 312 and the second connection part 313 need to be arranged on one side or both sides of the channel body 311 of the first heat exchange channel 31a in the second direction Y, that is, the first connection part 312 and the second connection part 313 are both closer to the edge of the box body 100 than the channel body 311 of the first heat exchange channel 31a and the channel body 311 of the second heat exchange channel 31b.

[0183] When the battery device 1000 is under low temperature heating conditions, the higher temperature heat exchange medium can enter the first connection part 312 from the inlet 3103 first. Since the battery cell 210 corresponding to the first connection part 312 for heat exchange is closer to the edge of the box body 100, more heat is dissipated to the external environment and the temperature drops faster. The higher temperature heat exchange medium in the first connection part 312 can not only increase the temperature of the battery cell 210 at the corresponding position close to the edge of the box body 100, but also make up for the battery cell 210 close to the edge of the box body 100 due to the heat exchange of the battery cell 210. The heat lost to the external environment is dissipated to meet its heating needs. As a result, the temperature difference between the peripheral battery cells 210 close to the edge of the box body 100 and in contact with the first connecting part 312 for heat exchange and the battery cells 210 close to the middle of the box body 100 (for example, the battery cells 210 corresponding to the heat exchange of the channel body 311 of the first heat exchange channel 31a and the battery cells 210 corresponding to the heat exchange of the channel body 311 of the second heat exchange channel 31b) can be reduced, thereby improving the temperature uniformity between the battery cells 210.

[0184] When the battery device 1000 is in a high-temperature cooling condition, the heat exchange medium can flow into the first connection part 312, the flow channel body 311, and the second connection part 313 in sequence. As the heat exchange medium flows, the temperature of the heat exchange medium gradually increases, that is, the temperature in the first connection part 312 is less than the temperature in the flow channel body 311, and the temperature in the second connection part 313. Among them, for the second connection part, since the second connection part is arranged closer to the edge of the box body than the flow channel body of the first heat exchange channel, that is, the battery cell 210 corresponding to the second connection part 313 for heat exchange is 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 connection part 313 can still meet the heat dissipation requirements of the corresponding battery cell 210 close to the edge of the box body 100. Therefore, the temperature difference between the battery cell 210 close to the edge of the box body 100 and in contact with the second connection part 313 for heat exchange and the battery cell 210 close to the middle of the box body 100 (for example, the battery cell 210 corresponding to the flow channel body 311 of the first heat exchange channel 31a and the battery cell 210 corresponding to the flow channel body 311 of the second heat exchange channel 31b) can be reduced, thereby improving the temperature uniformity between the battery cells 210.

[0185] When the first connection portion 312 and the second connection portion 313 are arranged on the same side of the flow channel body 311 of the first heat exchange channel 31a in the width direction of the housing 100, the first connection portion 312 and the second connection portion 313 are arranged side by side. Because 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 channel 31b, when operating in a low-temperature heating 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 operating in a high-temperature cooling 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 area that is in contact with the first connection part 312 and the second connection part 313 for heat exchange, the battery cells 210 in this heat exchange area are in contact with both the first connection part 312 and the second connection part 313 for heat exchange. At this time, the heat exchange temperature obtained in this heat exchange area is approximately the average temperature of the first connection part 312 and the second connection part 313. As a result, the probability of local excessive temperature or local excessive low temperature in the battery device 1000 can be reduced, and the temperature uniformity between the battery cells 210 can be improved.

[0186] In the above technical solution, the second heat exchange channel 31b includes a first connection part 312 and a second connection part 313, and the first connection part 312 and the second connection part 313 are respectively connected to the two ends of the channel body 311 of the second heat exchange channel 31b, and the ends of the first connection part 312 and the second connection part 313 away from the channel body 311 are respectively formed as the inlet 3103 and the outlet 3104 of the second heat exchange channel 31b. Therefore, the first connection part 312 and the second connection part 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 part 312 and the second connection part 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 excessive temperature or local excessive temperature in the battery device 1000, thereby improving the temperature uniformity between the battery cells 210.

[0187] In some embodiments of the present invention, referring to Figure 5 , the first connection portion 312 is closer to the edge of the box body 100 in the second direction Y than the second connection portion 313 .

[0188] That is, in the second direction Y, the distance between the first connection portion 312 and the nearest edge of the box 100 is smaller than the distance between the second connection portion 313 and the nearest edge of the box 100 .

[0189] Furthermore, the first connection portion 312 is closer to the edge of the box 100 in the first direction X than the second connection portion 313. In other words, in the first direction X, the distance between the first connection portion 312 and the nearest edge of the box 100 is smaller than the distance between the second connection portion 313 and the nearest edge of the box 100.

[0190] In some specific examples, the first connection portion 312 and the second connection portion 313 are both arranged on the same side of the box body 100 in the second direction Y. For example, the second direction Y is the left and right direction of the battery device 1000. The first connection portion 312 and the second connection portion 313 are both arranged on the left side of the box body 100, and the distance between the first connection portion 312 and the left edge of the box body 100 is smaller than the distance between the second connection portion 313 and the left edge of the box body 100.

[0191] Because the first heat exchange portion 3111 is positioned closer to the edge of the housing 100, it can exchange heat with the battery cells 210 located closer to the edge of the housing 100. Furthermore, because one end of the first connection portion 312 forms the inlet 3103 of the second heat exchange channel 31b, the heat exchange medium entering through the inlet 3103 first enters the first connection portion 312, then flows into the channel body 311, and finally into the second heat exchange portion 3112. Therefore, under low-temperature heating conditions, the temperature of the heat exchange channel 31 within the first connection portion 312 is higher, and the battery cells 210 engaging in heat exchange with the first connection portion 312 exchange more heat with the surrounding environment. Consequently, the high-temperature fluid within the first heat exchange portion 3111 can compensate for heat losses in the heat exchange between the battery cells 210 and the surrounding environment, thereby improving temperature uniformity among the battery cells 210.

[0192] In the above technical solution, since the first connection part 312 is arranged closer to the edge of the box body 100 in the second direction Y than the second connection part 313, and one end of the first connection part 312 is formed as an inlet 3103, the first connection part 312 can exchange heat with the battery cell 210 closer to the edge of the box body 100 than the second connection part 313, so that the heat exchange medium entering the first connection part 312 from the inlet 3103 can compensate for the heat loss of the battery cell 210 closer to the edge of the box body 100 and the environment, thereby improving the temperature uniformity between the battery cells 210.

[0193] In some embodiments of the present invention, referring to Figure 5 The first connection portion 312 and the second connection portion 313 are arranged on the same side of the first heat exchange channel 31 a in the second direction Y.

[0194] For example, if the second direction Y is the left-right direction, the first connection portion 312 and the second connection portion 313 can both be arranged on the left side of the first heat exchange channel 31a, or the first connection portion 312 and the second connection portion 313 can both be arranged on the right side of the first heat exchange channel 31a. In this case, for the heat exchange area that is in contact with the first connection portion 312 and the second connection portion 313 for heat exchange, the battery cells 210 in this heat exchange area are in contact with both the first connection portion 312 and the second connection portion 313 for heat exchange. In this case, the heat exchange temperature obtained in this heat exchange area is approximately the average temperature of the first connection portion 312 and the second connection portion 313. This can reduce the probability of local over-temperature or local over-temperature within the battery device 1000 and improve the temperature uniformity between the battery cells 210.

[0195] In the above technical solution, the first connection portion 312 and the second connection portion 313 are arranged on the same side of the first heat exchange channel 31a in the second direction Y, which can make it more convenient to bend and form the second heat exchange channel 31b, further simplify the arrangement of multiple heat exchange channels 31, and have a compact structure, thereby improving the space utilization rate in the box body 100. It can also reduce the probability of local over-temperature or local over-temperature in the battery device 1000, and improve the temperature uniformity between the battery cells 210.

[0196] In some embodiments of the present invention, referring to Figure 5 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.

[0197] In the above technical solution, the connection points between the first and second connection parts 312, 313 and the flow channel body 311 are both bent into a quarter-circular arc shape, which can ensure a smooth transition between the connection points between the first and second connection parts 312, 313 and the flow channel body 311, reduce turbulence and eddy currents, reduce flow resistance, reduce pressure drop, and improve heat exchange efficiency. It can also reduce stress concentration at the connection points between the first and second connection parts 312, 313 and the flow channel body 311, improve the structural stability and durability of the connection points between the first and second connection parts 312, 313 and the flow channel body 311, and extend the service life of the heat exchange assembly 300. In addition, it can also facilitate the processing and forming of the second heat exchange channel 31b and reduce the risk of leakage at the connection points between the first and second connection parts 312, 313 and the flow channel body 311.

[0198] In some embodiments of the present invention, referring to Figure 5 and Figure 6 , the inlets 3103 of the multiple heat exchange channels 31 are all connected, and the outlets 3104 of the multiple heat exchange channels 31 are all connected.

[0199] That is to say, multiple heat exchange channels 31 are arranged in parallel. When the heat exchange medium in the external pipeline enters the heat exchange component 300, it can evenly enter the multiple heat exchange channels 31 through the inlets 3103 of the multiple heat exchange channels 31, thereby achieving uniform distribution of the heat exchange medium and improving the uniformity of heat exchange of the battery cell 210.

[0200] Arranging multiple heat exchange channels 31 in parallel can also reduce the length of a single heat exchange channel 31, reduce flow resistance, reduce pressure drop, and improve heat exchange efficiency. When a heat exchange channel 31 fails, the remaining heat exchange channels 31 can operate normally, thereby improving the reliability of the battery device 1000 and reducing the risk of thermal runaway of the battery device 1000.

[0201] In the above technical solution, the inlets 3103 of the multiple heat exchange channels 31 are all connected, and the outlets 3104 are also all connected. This not only enables uniform distribution of the heat exchange medium in the multiple heat exchange channels 31 and improves the temperature uniformity of the battery device 1000, but also reduces flow resistance, improves heat exchange efficiency, and reduces the risk of thermal runaway of the battery device 1000.

[0202] In some embodiments of the present invention, referring to Figure 5 The heat exchange channel 31 includes a transverse portion 3101 and a longitudinal portion 3102 . The longitudinal portion 3102 extends along a first direction X, and the transverse portion 3101 extends along a second direction Y. The second direction Y is the width direction of the battery device 1000 . The longitudinal portion 3102 is closer to the edge of the box 100 than the transverse portion 3101 .

[0203] In some examples, the longitudinal portion 3102 may extend along a straight line parallel to the first direction X, or along a straight line inclined relative to the first direction X, or along a curve and / or a fold line extending in the first direction X. The transverse portion 3101 may extend along a straight line parallel to the second direction Y, or along a straight line inclined relative to the second direction Y, or along a curve and / or a fold line extending in the second direction Y.

[0204] In some examples, the number of longitudinal portions 3102 in each heat exchange channel 31 can be one or more, and the multiple longitudinal portions 3102 can be arranged at intervals in the second direction Y. The number of transverse portions 3101 in each heat exchange channel 31 can be one or more, and the multiple transverse portions 3101 can be arranged at intervals in the first direction X.

[0205] Among them, 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 channel 31, facilitate the molding of the heat exchange channel 31, and facilitate the combination and arrangement of multiple heat exchange channels 31 in the box body 100.

[0206] In some examples, the length of the longitudinal portion 3102 can be greater than, less than, or equal to the total length of the multiple battery cells 210 arranged in the first direction X. Any end of the longitudinal portion 3102 can extend beyond the multiple battery cells 210, can be flush with the end edges of the multiple battery cells 210 in the first direction X, or can be located between the ends of the multiple battery cells 210 in the first direction X. The length of the transverse portion 3101 in the second direction Y can be greater than, equal to, or less than the total length of the multiple battery cells 210 arranged in the second direction Y. Any end of the transverse portion 3101 in the second direction Y can extend beyond or be flush with one side edge of the multiple battery cells 210 arranged in the second direction Y, or can be located between the two side edges of the multiple battery cells 210 arranged in the second direction Y.

[0207] The edge of the box 100 refers to the position where the box 100 intersects with the external environment space of the box 100 , and the edge of the box 100 is closer to the external environment of the box 100 than other parts of the box 100 .

[0208] The longitudinal portion 3102 is closer to the edge of the housing 100 than the transverse portion 3101, meaning that, in the second direction Y, the distance between the longitudinal portion 3102 and the outer surface of the housing 100 closest to it in the second direction Y is smaller than the distance between the transverse portion 3101 and the outer surface of the housing 100. In this case, the longitudinal portion 3102 is arranged on the outer periphery of the transverse portion 3101. For example, the longitudinal portion 3102 can be arranged on one side of the transverse portion 3101 in the second direction Y, or on both sides of the transverse portion 3101 in the second direction Y.

[0209] In this way, the longitudinal portion 3102 can surround the transverse portion 3101 , and the longitudinal portion 3102 can exchange heat with the peripheral battery cells 210 located closer to the edge of the box body 100 among the plurality of battery cells 210 .

[0210] It should be noted that as the heat exchange medium flows through the heat exchange channel 31, its temperature gradually changes, resulting in a gradual decrease in the heat exchange effect. Specifically, when heating a battery cell, the temperature of the heat exchange medium gradually decreases as the heat exchange medium flows, and when cooling a battery cell, the temperature of the heat exchange medium gradually increases as the heat exchange medium flows.

[0211] 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. Therefore, the peripheral battery cells 210 near the edge of the box 100 have more heat exchange with the external environment than the internal battery cells 210 near the middle of the box 100, and heat dissipation is faster.

[0212] When the battery device 1000 is in a high-temperature cooling condition, the heat exchange medium entering from the inlet 3103 of the heat exchange channel 31 can first enter the longitudinal portion 3102 of the heat exchange channel 31 and then flow to the transverse portion 3101 of the heat exchange channel 31. The heat exchange medium can also first enter the transverse portion 3101 of the heat exchange channel 31 and then flow to the longitudinal portion 3102. When the heat exchange medium first enters the horizontal portion 3101 and then flows to the vertical portion 3102, the internal battery cells 210 near the middle of the box body 100 can be cooled in the horizontal portion 3101 first, and then enter the vertical portion 3102 to cool the peripheral battery cells 210 near the edge of the box body 100. Since the peripheral battery cells 210 closer to the edge of the box body 100 can directly dissipate heat to the environment through the box body 100, the natural heat dissipation of the peripheral battery cells 210 is better than that of the internal battery cells 210. Therefore, the heat exchange medium with a lower temperature in the horizontal portion 3101 can better meet the heat dissipation needs of the battery cells 210 in the middle of the box body 100, and at the same time Since the peripheral battery cells 210 near the edge of the box body 100 can dissipate heat naturally directly to the external environment, when the temperature of the heat exchange medium in the longitudinal portion 3102 is slightly higher, it can still meet the heat dissipation needs of the peripheral battery cells 210, so that the cooling effects obtained by the peripheral battery cells 210 near the edge of the box body 100 and the battery cells 210 near the middle of the box body 100 are roughly the same, and the temperatures of the peripheral battery cells 210 near the edge of the box body 100 and the battery cells 210 near the middle of the box body 100 after cooling and heat dissipation are relatively consistent, reducing the internal and external temperature difference between the battery cells 210 caused by heat dissipation to the environment, and making the temperature distribution in the battery device 1000 more uniform.

[0213] When the battery device is operating in a low-temperature heating condition, the heat exchange medium entering from the inlet 3103 of the heat exchange channel 31 may first enter the longitudinal portion 3102 of the heat exchange channel 31 and then flow toward the transverse portion 3101 of the heat exchange channel 31. Alternatively, the heat exchange medium may first enter the transverse portion 3101 of the heat exchange channel 31 and then flow toward the longitudinal portion 3102. For example, when the heat exchange medium flows from the longitudinal portion 3102 to the transverse portion 3101, the heat exchange medium may first heat the peripheral battery cells 210 near the edge of the housing 100 within the longitudinal portion 3102, and then enter the transverse portion 3101 to cool the battery cells 210 near the center of the housing 100. Since the peripheral battery cells 210 near the edge of the box 100 dissipate more heat to the external environment, the temperature of the peripheral battery cells 210 is more likely to drop. The higher temperature heat exchange medium first heats the peripheral battery cells 210 near the edge of the box 100. The higher temperature heat exchange medium can increase the temperature of the peripheral battery cells 210 while compensating for the heat lost by the peripheral battery cells 210 near the edge of the box 100 due to heat dissipation to the external environment, thereby meeting their heating needs. At the same time, the battery cells 210 near the middle of the box body 100 have less contact area with the external environment and less heat loss. The slightly lower temperature heat exchange medium flowing in the horizontal portion 3101 can cooperate with the heat generated by the battery cells themselves to meet their heating needs well. As a result, the heating effects obtained by the peripheral battery cells 210 near the edge of the box body 100 and the battery cells 210 near the middle of the box body 100 can be basically the same, and the temperatures of the peripheral battery cells 210 near the edge of the box body 100 and the battery cells 210 near the middle of the box body 100 after heating are relatively consistent, reducing the internal and external temperature difference between the battery cells 210 caused by heat dissipation to the environment, and making the temperature distribution in the battery device 1000 more uniform.

[0214] In addition, the longitudinal portion 3102 can achieve heat conduction in the length direction of the battery device 1000, and the transverse portion 3101 can achieve heat conduction in the width direction of the battery device 1000. This can further reduce the temperature difference between the length and width directions of the battery device 1000 and further improve the temperature uniformity of the battery device 1000.

[0215] In the above technical solution, since the longitudinal portion 3102 is closer to the edge of the box body 100 than 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 among the plurality of battery monomers 210, and the transverse portion 3101 can exchange heat with the battery monomer 210 close to the middle of the box body 100. When the heat exchange medium flows into the longitudinal portion 3102 and the transverse portion 3101 in turn, the internal and external temperature difference 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 caused by heat exchange with the environment can be compensated for, the heat exchange 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 tends to be consistent, the uniformity of the battery device 1000 is improved, and the service life of the battery device 1000 is improved to a certain extent. In addition, the heat exchange flow channel 31 includes the longitudinal portion 3102 extending along the first direction X and the transverse portion 3101 extending along the second 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.

[0216] In some embodiments of the present application, with reference to Figure 5 The plurality of transverse portions 3101 in the flow channel body 311 are arranged at intervals in the first direction X and are connected in turn, and the longitudinal portion 3102 in the flow channel body 311 is connected to at least part of the transverse portions 3101.

[0217] That is, the flow channel body 311 can include at least one longitudinal portion 3102 and a plurality of transverse portions 3101, wherein the flow channel body 311 can include two, three, four, five, six, eight or more transverse portions 3101, and the plurality of transverse portions 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.

[0218] The longitudinal portion 3102 can be connected to part of the plurality of transverse portions 3101, or the longitudinal portion 3102 can be connected to 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 connected in turn, and the longitudinal portion 3102 is connected to one of the transverse portions 3101 at the end in the first 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 second direction Y, and the plurality of transverse portions 3101 are connected through the longitudinal portion 3102.

[0219] In the above technical solution, since the multiple transverse portions 3101 of the flow channel body 311 are connected in sequence, and the longitudinal portion 3102 connects part or all of the transverse portions 3101, the multiple transverse portions 3101 can increase the arrangement density of the flow channel body 311 in the length direction of the battery device 1000, thereby improving the heat exchange efficiency and uniformity with the battery cells 210. The longitudinal portion 3102 is arranged at a position closer to the edge and connected to the transverse portion 3101. The longitudinal portion 3102 can exchange heat with the peripheral battery cells 210 near the edge of the box body 100, increase the heat exchange area with the peripheral battery cells 210, and improve the temperature uniformity of the battery device 1000.

[0220] In some embodiments of the present invention, referring to Figure 5 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. The second heat exchange part 3112 is bent and connected to one end of the first heat exchange part 3111.

[0221] The first heat exchange portion 3111 is bent and extended into a U shape, which can extend the length of the first heat exchange portion 3111, increase the heat exchange time and heat exchange area between the heat exchange medium in the first heat exchange portion 3111 and the battery cell 210, and improve the heat exchange effect.

[0222] The second heat exchange portion 3112 extends and bends, and is arranged inside the first heat exchange portion 3111. For example, the second heat exchange portion 3112 may extend and bend in a U-shape, an S-shape, or a U-shape within the first heat exchange portion 3111. The bent configuration of the second heat exchange portion 3112 increases the extension length of the second heat exchange portion 3112, thereby increasing the heat exchange time between the heat exchange medium and the battery cells 210 within the second heat exchange portion 3112 and improving the heat exchange effect.

[0223] The first heat exchange portion 3111 and the second heat exchange portion 3112 are connected by a bend. For example, the first heat exchange portion 3111 and the second heat exchange portion 3112 can be connected by a bent flow channel segment, and the bent flow channel segment can be bent along an arc and / or a fold line. In this way, the structure of the flow channel body 311 can be compacted, the arrangement density of the flow channels of the flow channel body 311 can be increased, and the uniformity of heat exchange for multiple battery cells 210 can be improved.

[0224] In some specific examples, the first heat exchange portion 3111 and the second heat exchange portion 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 occupied by the flow channel body 311.

[0225] The first heat exchange part 3111 is connected to the upstream side or 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.

[0226] Specifically, when the heat exchange component 300 dissipates heat and cools the battery cell 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 heat exchange medium with a lower temperature first cools the battery cell 210 at the middle position of the heat exchange area corresponding to the flow channel body 311, and then cools the battery cell 210 at the peripheral position of the heat exchange area corresponding to the flow channel body 311. Since the battery cell 210 at the peripheral position of the heat exchange area is closer to the edge of the box body 100 than the battery cell 210 at the middle position of the heat exchange area, it naturally dissipates more heat from the external environment of the box body 100. The heat exchange medium with a lower temperature in the second heat exchange part 3112 can In order to better meet the heat dissipation needs of the battery cells 210 at the middle position of the heat exchange area corresponding to the flow channel main body 311, at the same time, since the battery cells 210 at the peripheral positions of the heat exchange area can naturally dissipate more heat to the environment than the battery cells 210 at the middle position, the temperature of the heat exchange medium in the first heat exchange part 3111 is slightly higher, but it can still meet the heat dissipation needs of the battery cells 210 at the peripheral positions of the heat exchange area corresponding to the flow channel main body 311, so that the cooling effects obtained by the battery cells 210 at the peripheral positions and the middle positions of the heat exchange area corresponding to the flow channel main body 311 are roughly consistent and the temperatures tend to be consistent, thereby improving the temperature uniformity between the battery cells 210 in the heat exchange area corresponding to the flow channel main body 311.

[0227] When the heat exchange component 300 heats the battery cell 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 cell 210 at the peripheral position of the heat exchange area 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 cell 210 at the middle position of the heat exchange area corresponding to the flow channel body 311. Among them, since the battery cells 210 at the peripheral position of the heat exchange area corresponding to the flow channel main body 311 are closer to the edge of the box 100 body than the battery cells 2101 at the middle position of the heat exchange area, heat is more easily lost and the temperature drops faster. The higher temperature heat exchange medium in the first heat exchange part 3111 can not only be used to increase the temperature of the battery cells 210 at the peripheral position of the heat exchange area corresponding to the flow channel main body 311, but also can make up for the heat lost by the battery cells 210 at the peripheral position of the heat exchange area due to environmental heat dissipation, thereby meeting its heating needs. At the same time, since the battery cells 210 in the middle position of the heat exchange area corresponding to the flow channel main body 311 dissipate less heat to the external environment of the box body 100, the heat exchange medium with a slightly lower temperature in the second heat exchange part 3112 can also well meet the heating needs of the battery cells 210 in the middle position of the heat exchange area corresponding to the flow channel main body 311, so that the heating effects obtained by the battery cells 210 at the peripheral position and the middle position of the heat exchange area corresponding to the flow channel main body 311 are roughly consistent and the temperatures tend to be consistent, thereby improving the temperature uniformity between the battery cells 210 in the heat exchange area corresponding to the flow channel main body 311.

[0228] In the above technical solution, since the first heat exchange portion 3111 of the flow channel main body 311 is bent and extended into a U shape, the second heat exchange portion 3112 is bent and arranged in the first heat exchange portion 3111, and the first heat exchange portion 3111 is bent and connected to the second heat exchange portion 3112, the structure of the flow channel main body 311 can be compacted, the flow channel length of the flow channel main body 311 and the heat exchange area with the battery cell 210 can be increased, the flow time of the heat exchange medium in the flow channel main body 311 can be extended, the heat exchange efficiency can be improved, and the temperature uniformity between the battery cells 210 in the area where the flow channel main body 311 is located can be improved.

[0229] In some embodiments of the present invention, referring to Figure 5 The second heat exchange portion 3112 includes a plurality of transverse portions 3101, which extend along the second direction Y and are arranged at intervals in the first direction X. The second direction Y is the width direction of the battery device 1000, and the plurality of transverse portions 3101 of the second heat exchange portion 3112 are bent and connected in sequence along the first direction X.

[0230] The second heat exchange portion 3112 may include two, three, four, five or more transverse portions 3101 .

[0231] In some examples, two connected transverse portions 3101 may be connected by bending along a fold line, or may be connected by bending along an arc line. Furthermore, two adjacent transverse portions 3101 may be bent into a U-shape or a V-shape.

[0232] In the above technical solution, the second heat exchange part 3112 includes multiple transverse parts 3101. The multiple transverse parts 3101 can increase the heat exchange area of ​​the second heat exchange part 3112, improve the heat exchange efficiency, make the heat of the second heat exchange part 3112 evenly distributed, and improve the temperature uniformity between the battery cells 210. In addition, the multiple transverse parts 3101 are bent and connected in sequence, which can simplify the structure of the second heat exchange part 3112 and facilitate the processing and molding of the second heat exchange part 3112.

[0233] In some embodiments of the present invention, referring to Figure 5 The connection position of the two adjacent horizontal parts 3101 of the second heat exchange part 3112 is bent into a semicircular arc shape.

[0234] For example, the second heat exchange portion 3112 includes multiple transverse portions 3101 extending along the second direction Y and arranged parallel and spaced apart in the first direction X. The spacing between two adjacent transverse portions 3101 can be set based on the heat exchange requirements of the battery cells 210. The multiple transverse portions 3101 are connected by sequential bends, and the bends are semicircular arcs that protrude away from the transverse portions 3101 in the second direction Y.

[0235] Among them, the connection position of the two horizontal parts 3101 is bent into a semicircular arc shape, which can not only further reduce the flow resistance of the heat exchange medium at the bending position, reduce pressure drop, and improve heat exchange performance, but also reduce stress concentration at the bending position, thereby improving the reliability and service life of the heat exchange component 300.

[0236] In the above technical solution, the connection position of the two transverse parts 3101 of the second heat exchange part 3112 is bent into a semicircular arc shape, which not only allows the two transverse parts 3101 to be arranged in parallel and spaced apart, compacts the structure of the second heat exchange part 3112, and improves 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 3112, and can also reduce the stress concentration at the bending position, thereby improving the service life of the heat exchange component 300.

[0237] In some embodiments of the present invention, referring to Figure 5 The first heat exchange portion 3111 includes: two transverse portions 3101 and one longitudinal portion 3102. The two transverse portions 3101 extend along the second direction Y and are arranged at intervals in the first direction X. The second direction Y is the width direction of the battery device 1000. The longitudinal portion 3102 extends along the first direction X and is connected between the two transverse portions 3101.

[0238] For example, the two transverse portions 3101 of the first heat exchange portion 3111 extend along the second direction Y and are arranged parallel and spaced apart in the first direction X. The longitudinal portion 3102 is arranged perpendicular to the two transverse portions 3101, and the two ends of the longitudinal portion 3102 in the first direction X are respectively connected to the ends of one end of the two transverse portions 3101 in the second direction Y to form a U-shaped first heat exchange portion 3111.

[0239] In the above technical solution, since the first heat exchange part 3111 includes two horizontal parts 3101 and a vertical part 3102 connected between the two horizontal parts 3101, the second heat exchange part 3112 can be conveniently surrounded on the inside, simplifying the structure of the first heat exchange part 3111, facilitating the processing and molding of the first heat exchange part 3111, and improving production efficiency.

[0240] In some embodiments of the present invention, referring to Figure 5 The connection positions of the two horizontal parts 3101 and the vertical part 3102 of the first heat exchange part 3111 are bent into a quarter arc shape.

[0241] Specifically, one end of one of the transverse parts 3101 of the first heat exchange part 3111 is connected to one end of the longitudinal part 3102, and the connection position is bent into a quarter arc shape, and one end of the other transverse part 3101 of the first heat exchange part 3111 is connected to the other end of the longitudinal part 3102, and the connection position is also bent into a quarter arc shape.

[0242] In the above technical solution, the connection between the transverse portion 3101 and the longitudinal portion 3102 of the first heat exchange portion 3111 is bent into a quarter-circular arc shape, which allows for a smooth transition between the two portions, reduces turbulence and eddies, reduces flow resistance, lowers pressure drop, and improves heat exchange efficiency. It also reduces stress concentration at the connection between the transverse portion 3101 and the longitudinal portion 3102, improves the structural stability and durability of the connection between the transverse portion 3101 and the longitudinal portion 3102, and increases the service life of the heat exchange assembly 300. Furthermore, it facilitates the processing and forming of the first heat exchange portion 3111 and reduces the risk of leakage at the connection between the transverse portion 3101 and the longitudinal portion 3102.

[0243] In some embodiments of the present invention, referring to Figure 5 The first heat exchange portion 3111 and the second heat exchange portion 3112 are connected by bending.

[0244] Specifically, the other end of one of the transverse portions 3101 of the first heat exchange portion 3111 is bent and connected to the transverse portion 3101 closest to the plurality of transverse portions 3101 of the second heat exchange portion 3112 .

[0245] In the above technical solution, since the first heat exchange portion 3111 is connected to the second heat exchange portion 3112 by bending, the second heat exchange portion 3112 can be conveniently bent and arranged inside the first heat exchange portion 3111, so that the first heat exchange portion 3111 can conveniently cover the second heat exchange portion 3112 therein, thereby compacting the structure of the heat exchange channel 31, improving the uniformity of the distribution of the heat exchange channel 31 on the surface of multiple battery cells 210, and improving the temperature uniformity of the battery device 1000.

[0246] In some embodiments of the present invention, referring to Figure 5 The connection position between the first heat exchange part 3111 and the second heat exchange part 3112 is bent into a semicircular arc shape.

[0247] For example, the first heat exchange portion 3111 is connected to the second heat exchange portion 3112 via a semicircular bending section, wherein the bending section extends along a semicircular arc line protruding in the second direction Y away from the first heat exchange portion 3111 and the second heat exchange portion 3112 .

[0248] In the above technical solution, since the connection between the first heat exchange portion 3111 and the second heat exchange portion 3112 is bent into a semicircular arc, the connection between the first heat exchange portion 3111 and the second heat exchange portion 3112 can be smoothly transitioned, reducing turbulence and eddy currents, reducing flow resistance, lowering pressure drop, and improving heat exchange efficiency. It can also reduce stress concentration at the connection between the first heat exchange portion 3111 and the second heat exchange portion 3112, improving the structural stability and durability of the connection between the first heat exchange portion 3111 and the second heat exchange portion 3112, and extending the service life of the heat exchange assembly 300. Furthermore, it can also facilitate the processing and forming of the flow channel body 311, reducing the risk of leakage at the connection between the first heat exchange portion 3111 and the second heat exchange portion 3112.

[0249] In some embodiments of the present invention, referring to Figure 5 Each heat exchange channel 31 has an inlet 3103 and an outlet 3104, and each heat exchange channel 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.

[0250] The extended length of the heat exchange channel 31 refers to the total length of the path along the flow direction of the heat exchange medium that the heat exchange medium flows through from the inlet 3103 to the outlet 3104 of the heat exchange channel 31 .

[0251] For example, the ratio of the extension lengths of any two heat exchange channels 31 may be 0.8, 0.85, 0.9, 0.95, 1.0, 1.05, 1.1, 1.15 or 1.2.

[0252] In the technical scheme, the ratio of the extension lengths of any two heat exchange channels 31 is set to 0.8-1.2, so that the extension lengths of any two heat exchange channels 31 are relatively close, the flow distances of the heat exchange medium in each heat exchange channel 31 are relatively uniform, the flow resistances in each heat exchange channel 31 are close, the heat exchange efficiency of each heat exchange channel 31 is uniform, and the temperature uniformity between the battery monomers 210 corresponding to each heat exchange channel 31 is improved.

[0253] In some embodiments of the utility model, refer to Figure 5 The heat exchange assembly 300 includes a plurality of heat exchange pipes 30, and each heat exchange pipe 30 is bent and extended and defines a heat exchange channel 31.

[0254] The heat exchange pipe 30 is a tubular element for realizing heat exchange, and the heat exchange medium can flow in the inside of the heat exchange pipe 30 and transfer the heat of the heat exchange medium to an object (for example, the battery monomer 210) that needs to be heated or cooled through the pipe wall of the heat exchange pipe 30.

[0255] In some examples, each heat exchange pipe 30 is formed by bending a single pipe, so that the number of welding points of the heat exchange pipe 30 can be reduced, the risk of leakage of the heat exchange assembly 300 is reduced, the operation process of bending a single pipe is relatively simple compared with the manufacturing process of a plate structure, and the heat exchange pipe requires less material than a cold plate, so that the cost of the heat exchange assembly 300 can be significantly reduced.

[0256] Compared with the related art, the flow channel in the cold plate is narrow, the flow rate is limited and uneven, and the heat exchange pipe 30 of the utility model is bent and extended and defines a heat exchange channel 31, the heat exchange medium in the heat exchange pipe 30 can realize a high flow rate, the degree of turbulent flow of the heat exchange medium is improved, so that the heat exchange efficiency of the battery monomer 210 can be improved, and 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, so that the temperature uniformity between the battery monomers 210 can be improved.

[0257] 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, so that the probability of local temperature being too high and temperature being too low in the battery device 1000 can be effectively reduced, and the temperature uniformity between the battery monomers 210 is improved.

[0258] The shape of the heat exchange pipe 30 can include various shapes, for example, a circular pipe or a flat pipe.

[0259] For example, the number of heat exchange pipes 30 can be one, two, three or more, and the number of heat exchange pipes 30 can be designed according to the number and size of the battery monomers 210.

[0260] In the above technical solution, since the heat exchange assembly 300 includes a plurality of heat exchange pipes 30, each heat exchange pipe 30 is bent and extends and defines a heat exchange flow channel 31, which not only reduces the process complexity of forming the heat exchange flow channel 31, thereby improving the production rate of the heat exchange assembly 300, but also reduces the fluid pressure drop in a single heat exchange pipe 30, improves the heat exchange efficiency, and also realizes uniform transmission of the heat exchange medium temperature, thereby improving the temperature uniformity between the battery monomers 210. In addition, the tubular structure is relatively simple compared to the plate structure, uses less material, has low cost, and is easy to process.

[0261] In some embodiments of the present application, a partition rib (not shown in the figure) is arranged in the heat exchange pipe 30, the partition rib extends along the extension direction of the heat exchange pipe 30, and the heat exchange flow channel 31 is divided into a plurality of sub-flow channels arranged in parallel.

[0262] For example, the heat exchange pipe 30 is a flat tube or a harmonica tube, and the partition rib can be arranged in the flat tube or the harmonica tube, the partition rib can extend 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 and arranged in the width direction of the heat exchange pipe 30, and the one or more 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.

[0263] In some examples, to improve the heat exchange efficiency between the heat exchange tubes 30 and the battery cell assemblies 200 and increase the heat exchange contact area between the heat exchange tubes 30 and the battery cells 210, the arrangement density of the heat exchange tubes 30 is typically increased. Therefore, when the heat exchange tubes 30 are bent, a smaller bending radius is typically used at the bend location to increase the arrangement density of the heat exchange tubes 30. However, when the bending radius of the heat exchange tubes 30 is small, the heat exchange tubes 30 deform and elongate significantly at the bend location, affecting the structural strength and sealing performance of the heat exchange tubes 30. Therefore, in some examples, the heat exchange tube 30 is provided with a separation rib, which extends along the extension direction of the heat exchange tube 30. The separation rib is arranged inside the heat exchange tube 30, and in the cross section of the heat exchange tube 30, the two ends of the separation rib are respectively connected to the inner wall surfaces on the opposite sides of the heat exchange tube 30. For example, the separation rib can be connected to the inner walls on the opposite sides of the heat exchange tube 30 in the thickness direction. In this way, the separation rib can play a role in supporting the inner wall of the heat exchange tube 30 inside the heat exchange tube 30, thereby improving the structural strength of the heat exchange tube 30 and improving the deformation resistance of the heat exchange tube 30. At the same time, at the bending position of the heat exchange tube 30, the separation rib can strengthen the structural strength of the bending position of the heat exchange tube 30, reduce the risk of local strength deficiency of the heat exchange tube 30 due to bending, and improve the service life of the heat exchange tube 30.

[0264] In the above technical solution, since the separation ribs are provided in the heat exchange tube 30, the separation ribs can not only increase the heat exchange area between the heat exchange medium and the heat exchange tube 30 and improve the heat exchange efficiency, but also improve the structural strength of the heat exchange tube 30, improve the reliability and stability of the heat exchange assembly 300, and strengthen the structural strength of the bending position of the heat exchange tube 30, reduce the risk of local strength deficiency of the heat exchange tube 30 due to bending, and improve the service life of the heat exchange tube 30.

[0265] In some embodiments of the present invention, referring to Figure 3-Figure 5 The battery cell assembly 200 includes multiple columns of battery cells 210. The multiple battery cells 210 are stacked in a row along the second direction Y. The multiple columns of battery cells 210 are arranged in the first direction X to form the battery cell assembly 200. The heat exchange assembly 300 is arranged on at least one side of the battery cell assembly 200 in the third direction Z. The second direction Y is the width direction of the battery device 1000. The first direction X, the second direction Y, and the third direction Z are arranged at an angle to each other.

[0266] For example Figure 3-Figure 4As shown, the battery device 1000 includes a plurality of battery cell assemblies 200, each battery cell assembly 200 includes one or more battery cells 210 arranged in a row. The battery device 1000 in the embodiment of the present invention includes three battery cell assemblies 200, and the three battery cell assemblies 200 are arranged in sequence along a first direction X. Each battery cell assembly 200 includes two rows of battery cells 210 arranged side by side in the first direction X. The multiple battery cells 210 in each row of battery cells 210 are stacked in a second direction Y, and the second direction Y is the thickness direction of the battery cell 210, which is also the left-right direction. The first direction X is the length direction of the battery cell 210, which is also the front-back direction.

[0267] Since the first direction X is the length direction of the housing 100 and the second direction Y is the width direction of the housing 100, when the multiple battery cells 210 of the battery cell assembly 200 are stacked and arranged in a row along the second direction Y, the direction in which the multiple battery cells 210 are stacked in the thickness direction is along the width direction of the housing 100. By stacking the multiple battery cells 210 in the battery cell assembly 200 along the width direction of the housing 100, the present invention can design and adjust the number of battery cells 210 in the battery cell assembly 200 along the width direction of the housing 100 according to the size of the housing 100 in the width direction, thereby improving the space utilization within the housing 100.

[0268] It should be noted that when the battery cell assembly 200 is arranged in the box body 100 and the arrangement method of the relevant technology is adopted in which the thickness direction of the battery cell 210 is parallel to the length direction of the box body 100 and the length direction of the battery cell 210 is parallel to the width direction of the box body 100, the total number of battery cells 210 that can be arranged in sequence in the width direction of the box body 100 is: the quotient obtained by dividing the width dimension of the box body 100 by the length dimension of the battery cell 200 and then rounding down.

[0269] When the battery cell assembly 200 is arranged in the box body 100, and the thickness direction of the battery cell 210 of the present invention is parallel to the width direction of the box body 100, and the length direction of the battery cell 210 is parallel to the length direction of the box body 100, the total number of battery cells 210 that can be arranged in sequence in the width direction of the box body 100 is: the quotient obtained by dividing the width dimension of the box body 100 by the thickness dimension of the battery cell 210 and then rounding down.

[0270] Since the thickness dimension of the battery monomer 210 is much smaller than the length dimension of the battery monomer 210, when the outer contour of the box body 100 is determined, the width dimension of the box body 100 is determined, the arrangement scheme of the battery monomer assembly 200 of the utility model is adopted, that is, the thickness direction of the battery monomer 210 is parallel to the width direction of the box body 100, the battery monomer 210 is stacked in the width direction of the box body 100, the width dimension of the box body 100 can be more flexibly adapted, the space in the width direction of the box body 100 is fully utilized, and the energy density of the battery device 1000 is improved.

[0271] 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.

[0272] Through heat exchange between the heat exchange assembly 300 and the plurality of battery monomers 210 of the battery monomer assembly 200, the plurality of battery monomers 210 can work in a suitable temperature range, and the reliability, stability and service life of the battery device 1000 are improved.

[0273] The heat exchange assembly 300 has a plurality of heat exchange pipes 30, each of which is bent and extends and defines a heat exchange flow channel 31 on the inner side, each of the heat exchange flow channels 31 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.

[0274] Since the plurality of columns of battery monomers 210 of the battery monomer assembly 200 are arranged in sequence along the first direction, the plurality of battery monomer assemblies 200 are arranged in sequence along the first direction, and the plurality of flow channel bodies 311 are arranged in sequence along the first direction, each flow channel body 311 can be in heat exchange with one or a plurality of battery monomer assemblies 200 arranged adjacently corresponding, or each flow channel body 311 can be in heat exchange with one column or a plurality of columns of battery monomers 210 arranged adjacently corresponding. For example, the flow channel body 311 of the first heat exchange flow channel 31a is in heat exchange with two battery monomer assemblies 200, and the flow channel body 311 of the second heat exchange flow channel 31b is in heat exchange with one battery monomer assembly 200. Therefore, the temperature uniformity between the battery monomer assemblies 200 can be improved.

[0275] Therefore, by controlling the temperature of the corresponding heat exchange channel 31, the temperature of the heat exchange medium in each 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 then the temperature difference between different battery cell assemblies 200 or between different columns of battery cells 210 can be controlled to reduce, and the temperature uniformity between battery cell assemblies 200 or between multiple columns of battery cells 210 can be improved.

[0276] In addition, since multiple 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 bending and extending, it can be set to extend back and forth in 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 area for heat exchange when extending back and forth, reducing the risk of local excessive temperature or too low temperature due to the battery cell 210 not being in contact with the flow channel body 311 in the corresponding heat exchange area, thereby improving the temperature uniformity between the battery cells 210.

[0277] In some examples, each heat exchange channel 31 includes multiple transverse portions 3101, which extend along the width of the housing 100 and are spaced apart in the length direction of the housing 100. Furthermore, the channel body 311 extends back and forth along the width of the housing 100 and includes multiple transverse portions 3101 connected in sequence, wherein each column of battery cells 210 exchanges heat with at least two transverse portions 3101. In this way, the heat exchange temperature between each column of battery cells 210 and the heat exchange channel 31 is equivalent to the average temperature of the multiple transverse portions 3101. This can reduce the risk of localized over-temperature or over-temperature in the battery device 1000 and improve the temperature uniformity of the battery device 1000. For example, each column of battery cells 210 can exchange heat with two, three, four, or more transverse portions 3101.

[0278] In the above technical solution, by making the battery cell assembly 200 include multiple columns of battery cells 210, multiple battery cells 210 are stacked in a row along the second direction Y, and multiple columns of battery cells 210 are arranged in the first direction X to form a battery cell assembly 200, the width dimension of the box 100 (that is, the dimension of the box in the second direction) can be more flexibly adapted, and the space in the width direction of the box 100 is fully utilized to improve the energy density of the battery device 1000. At the same time, by arranging the heat exchange component 300 on one side of the battery cell assembly 200 in the third direction and arranging the multiple flow channel bodies along the first direction, the heat exchange component 300 can be arranged on the other side of the battery cell assembly 200 in the third direction. By controlling the temperature of the heat exchange medium in each flow channel body 311, independent and precise control of the temperature of each battery cell assembly 200 or each column of battery cells 210 can be achieved, thereby improving the temperature uniformity between the battery cell assemblies 200. The flow channel body 311 can also be conveniently arranged to extend back and forth along the width direction of the box body 100, so that the flow channel body 311 is in contact with each battery cell 210 in the corresponding heat exchange area for heat exchange, reducing the risk of local excessive temperature or excessive low temperature due to the battery cell 210 not being in contact with the flow channel body 311 in the corresponding heat exchange area, thereby improving the temperature uniformity between the battery cells 210.

[0279] In some embodiments of the present invention, Figure 6 As shown, the width of the heat exchange channel 31 is a first width H1 , the dimension of the battery cell 210 in the first direction X is a second width H2 , and the ratio of the first width H1 to the second width H2 is greater than or equal to one third.

[0280] In some examples, a heat exchange channel 31 is defined in the heat exchange tube 30 , and the width of the heat exchange channel 31 is the width of the heat exchange tube 30 or the length of the cross section of the heat exchange tube 30 .

[0281] 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 or above.

[0282] In some examples, when the battery cells 210 exchange heat with the multiple transverse portions 3101 of the heat exchange channel 31, in the first direction X, the sum of the widths of the multiple transverse portions 3101 that exchange heat with each battery cell 210 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. This can increase the heating rate of the heat exchange assembly 300 on the battery cells 210 and improve the temperature rise rate of the battery cells 210.

[0283] In the above technical solution, 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, it is possible to increase the width of the heat exchange channel 31, increase the flow cross-sectional area of ​​the heat exchange channel 31, reduce the pressure drop of the heat exchange channel 31, and improve the heat exchange efficiency, and also increase the heat exchange area between the heat exchange channel 31 and the battery cell 210, thereby increasing the heating rate of the heat exchange component 300 on the battery cell 210 and increasing the temperature rise rate of the battery cell 210.

[0284] In some embodiments of the present invention, referring to Figure 5 and Figure 6 The heat exchange assembly 300 includes a plurality of heat exchange tubes 30, each heat exchange tube 30 defines a heat exchange channel 31, and the battery cell 210 has a first wall surface for cooperating with the heat exchange tube 30 for heat exchange. With the first wall surface as the projection surface, the area of ​​the positive 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.

[0285] Among them, the first wall surface that cooperates with the battery cell 210 and the heat exchange tube 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 of the third direction Z. When the heat exchange tube 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 tube 30 through the first wall surface, or from the heat exchange medium in the heat exchange tube 30 to the battery cell 210.

[0286] The orthographic projection of the heat exchange tube 30 on the first wall refers to the projection of the heat exchange tube 30 on the first wall along a direction parallel to the third direction Z. When the heat exchange tube 30 is a flat tube, the orthographic projection of the heat exchange tube 30 on the first wall is the contact area between the heat exchange tube 30 and the battery cell 210.

[0287] It is understandable that when the battery cell 210 is cooling or heating, under the condition that the fluid temperature of the heat exchange medium remains unchanged, the larger the heat exchange area between the battery cell 210 and the heat exchange tube 30, the faster the cooling rate or heating rate of the battery cell 210.

[0288] In the above technical solution, since the heat exchange contact area of the heat exchange pipe 30 and 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. In this way, 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 the normal working process of the battery device 1000, the temperature fluctuation of the battery monomer 210 during the working process is reduced, and the battery monomer 210 operates more stably, so that the battery device 1000 can maintain good performance.

[0289] In some embodiments of the utility model, refer to Figure 7 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, and the battery monomer 210 is arranged in the containing cavity.

[0290] 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, and 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.

[0291] In some examples, the periphery of the bottom plate 110 is provided with a horizontally extending first flange, the first fixing hole penetrates the first flange in the up-down direction, the periphery of the upper cover 120 is formed with a second flange, and the second fixing hole penetrates the second flange in the up-down direction.

[0292] In some examples, a sealing element 140 is arranged between the bottom plate 110 and the upper cover 120, the sealing element 140 extends along the circumferential direction 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, and the sealing element 140 is used to seal the gap between the bottom plate 110 and the upper cover 120. Wherein, the sealing element 140 can be a sealing gasket, the sealing element 140 can extend in the circumferential direction of the bottom plate 110 and the upper cover 120 to be annular, and the sealing element 140 can also include a plurality of sealing segments, which are arranged in sequence or spaced apart in sequence along the circumferential direction of the bottom plate 110 and the upper cover 120.

[0293] In some examples, a mounting plate 113 extending toward the upper cover 120 is formed on one side edge of the bottom plate 110 in the first direction X. The upper cover 120 is formed with a relief opening that matches the shape of the mounting plate 113, and the mounting plate 113 fits within the relief opening. The mounting plate 113 may be provided with a mounting portion, and the number of the mounting portions may be one or more. The mounting portion may be used to fix and install pipe joints (such as the liquid inlet joint and liquid outlet joint described below), which are used to connect the liquid inlet and liquid outlet of the heat exchange assembly 300 to external pipelines. In addition, the mounting portion may also be used to install connection terminals, which may be used to electrically connect the battery cell assembly 200 to an external circuit, and the connection terminals may also be used to electrically connect electrical components within the housing 100 to external electrical components.

[0294] In the above technical solution, since the box body 100 includes an upper cover 120 and a bottom plate 110, the upper cover 120 and the bottom plate 110 cooperate to define a accommodating cavity, and the upper cover 120 and the bottom plate 110 can encapsulate and protect the battery cell 210. In addition, the box body 100 is divided into an upper cover 120 and a bottom plate 110, which can simplify the structure of the box body 100, facilitate the processing and forming of the box body 100, and facilitate the installation of components inside the battery device 1000.

[0295] In some embodiments of the present invention, referring to Figure 7 The box body 100 also includes: a mounting beam 130, the end plate mounting beam 130 is arranged in the accommodating cavity, the mounting beam 130 extends along the first direction X and is arranged on both side edges of the bottom plate 110 in the second direction Y, and the battery cell assembly 200 is arranged between the two mounting beams 130.

[0296] The battery cell assembly 200 includes multiple columns of battery cells 210, and the multiple battery cells 210 in each column of battery cells 210 are stacked along the second direction Y. The two mounting beams 130 are respectively arranged on both sides of the battery cell assembly 200 in the second direction Y. In this way, the battery cell assembly 200 can be fixedly connected to the mounting beams 130. At the same time, the mounting beams 130 can limit the multiple battery cells 210 in the battery cell assembly 200, limit the displacement of the battery cell assembly 200 in the second direction Y, and limit the expansion of the multiple battery cells 210 in the second direction Y, so that the battery cells 210 can operate normally.

[0297] In some examples, the mounting beam 130 may be detachably connected to the base plate 110 , for example, by fasteners and / or snap-fit ​​connections. The mounting beam 130 may also be welded and / or adhesively connected to the base plate 110 .

[0298] In some examples, the mounting beam 130 can be a one-piece piece to reduce the number of parts and improve assembly efficiency. The mounting beam 130 can also include multiple beam sections, each of which extends along the first direction X and is sequentially connected in the second direction Y, thereby reducing the processing difficulty of the mounting beam 130 and improving processing efficiency.

[0299] In the above technical solution, since the battery cell assembly 200 is arranged between the two mounting beams 130, the mounting beams 130 can 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 cell assembly 200 to the mounting beams 130, thereby improving the reliability of the battery cell assembly 200 being fixed in the box body 100. In addition, the mounting beams 130 can also limit the displacement of the battery cell assembly 200 in the second direction Y, limit the expansion beams of multiple battery cells 210 in the battery cell assembly 200 in the second direction Y, and improve the stability of the operation of the battery device 1000.

[0300] In some embodiments of the present invention, referring to Figure 7 The heat exchange component 300 is disposed in the box body 100 .

[0301] Among them, the heat exchange assembly 300 can be arranged between the bottom wall of the box body 100 and the battery cell assembly 200, or between the top wall of the box body 100 and the battery cell assembly 200, or between the side wall of the box body 100 and the battery cell assembly 200, or between adjacent battery cell assemblies 200, or between two adjacent rows of battery cells 210 in the battery cell assembly 200.

[0302] In the above technical solution, the heat exchange assembly 300 is disposed within the housing 100, which facilitates direct heat exchange between the heat exchange assembly 300 and the battery cells 210, reducing heat loss and improving heat exchange efficiency. Furthermore, the housing 100 protects the heat exchange assembly 300, thereby extending its service life.

[0303] In some embodiments of the present invention, referring to Figure 7 The heat exchange assembly 300 includes a plurality of heat exchange tubes 30, each heat exchange tube 30 defines a heat exchange flow channel 31, and the bottom plate 110 of the box body 100 is formed with a plurality of ribs 111, and the plurality of 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.

[0304] For example, the number of the ribs 111 on the bottom plate 110 may be four, eight, ten, twelve, fifteen or more.

[0305] In some examples, the ribs 111 on the bottom plate 110 can be formed by protruding from a portion of the bottom plate 110 upward. For example, a plurality of ribs 111 can be stamped and formed on the bottom plate 110. Arranging a plurality of ribs 111 on the bottom plate 110 can improve the structural strength of the bottom plate 110 and enhance the stability of the bottom plate 110 in supporting the battery cell assembly 200.

[0306] like Figure 7 As shown, the plurality of ribs 111 may include a plurality of first ribs 111 extending along the second direction Y and spaced apart in the first direction X. Both ends of the first ribs 111 in the second direction Y are spaced apart from the mounting beam 130. Furthermore, the plurality of ribs 111 may include a second rib 111 extending along the first direction X and disposed on one side of the plurality of first ribs 111 in the second direction Y. Accommodation grooves 112 are formed between the plurality of first ribs 111, between the first ribs 111 and the second ribs 111, between the plurality of first ribs 111 and the mounting beam 130, and between the second ribs 111 and the mounting beam 130.

[0307] The heat exchange tube 30 is arranged within the receiving groove 112, that is, between the multiple ribs 111. In this way, the ribs 111 provide support between the base plate 110 and the battery cell assembly 200, reducing the pressure exerted by the battery cell assembly 200 on the heat exchange tube 30 and improving the reliability of the heat exchange tube 30. Furthermore, the upper surface of the rib 111 is flush with the upper surface of the heat exchange tube 30. This allows the heat exchange tube 30 to achieve close contact with the battery cell 210 for heat exchange, further reducing the pressure exerted by the battery cell assembly 200 on the heat exchange tube 30 and improving the service life of the heat exchange assembly 300.

[0308] In the above technical solution, since the heat exchange tube 30 of the heat exchange assembly 300 is arranged in the receiving groove 112 defined by multiple ribs 111 on the base plate 110, the rib 111 can not only improve the structural strength of the base plate 110 and enhance the supporting stability of the base plate 110 on the battery cell assembly 200, but also reduce the pressure of the battery cell assembly 200 on the heat exchange tube 30, thereby improving the service life of the heat exchange assembly 300.

[0309] In some embodiments of the present invention, referring to Figure 2 and Figure 7 The ratio of the length of the box body 100 in the first direction X to the width of the box body 100 in the second direction Y is greater than 2, and the second direction Y is the width direction of the battery device 1000.

[0310] For example, the outer contour of the box 100 is a rectangular parallelepiped, and the length of the box 100 is greater than twice the width of the box 100. For example, the ratio of the length of the box 100 to the width of the box 100 can be 2.2, 2.4, 2.6, 2.8, 3, 3.2, 3.5, or 4 or more. In this case, the box 100 is a long box with a length much greater than its width.

[0311] Since the length of the housing 100 of the present invention is greater than twice its width, the battery device 1000 is relatively long. If the technical solution of the related art is adopted, wherein the multiple heat exchange channels of the heat exchange assembly are arranged along the width of the housing, and each heat exchange channel extends back and forth along the length of the housing for heat exchange with the battery cells, the reciprocating extension of the heat exchange channel requires the heat exchange channel to be bent at a certain bending radius. At this time, some battery cells will be located in the area between the two channel sections connected at both ends of the bend. The battery cells in this area do not contact the heat exchange channel, and there will be a large temperature difference between the battery cells that do not exchange heat with the heat exchange channel and the battery cells that do exchange heat with the heat exchange channel.

[0312] Therefore, the length dimension of the box body 100 of the present invention is greater than 2 times the width dimension of the box body 100, and the flow channel main body 311 of multiple heat exchange channels 31 is arranged along the length direction of the box body 100, which can be beneficial to the bending design of the flow channel main body 311, making it convenient for multiple heat exchange channels 31 to contact and exchange heat with all battery cells 210, thereby improving the temperature uniformity between the battery cells 210.

[0313] At the same time, if a heat exchange scheme in which a heat exchange channel extends back and forth along the length direction of the battery device and multiple heat exchange channels are arranged along the width direction of the battery device in the related technology is adopted, since the length of the box body 100 of the utility model is relatively long, the flow channel section of the heat exchange channel extending along the length direction of the box body needs to extend from one end of the box body to the other end. The extension distance of the flow channel section is relatively long. When the heat exchange medium flows from one end to the other end in the flow channel section, since the heat exchange medium needs to exchange heat with multiple battery cells arranged in sequence in the length direction of the battery device in sequence, the temperature of the heat exchange medium will gradually decrease or increase, thereby making the temperature difference of the heat exchange medium at both ends of the flow channel section larger. Due to the large temperature difference of the heat exchange medium, after exchanging heat with the battery cells corresponding to the two ends, the temperature difference between the battery cells at the two ends in the length direction of the battery device is also larger.

[0314] Therefore, the present invention arranges the flow channel body 311 of the heat exchange flow channel 31 along the length direction of the battery device 1000, thereby reducing the extension length of the flow channel section of the heat exchange flow channel 31 or the flow channel body 311 in the length direction of the battery device 1000, reducing the temperature difference of the heat exchange medium between the two ends of the flow channel section extending along the length direction of the battery device 1000, making the heat exchange temperature of the heat exchange medium at both ends of the flow channel section tend to be consistent, making the heat exchange efficiency between the two ends of the flow channel section and the battery cells 210 tend to be consistent, and improving the temperature uniformity between the battery cells 210.

[0315] In addition, the flow channels of the flow channel main body 311 of the present invention are centrally arranged, and multiple flow channel main bodies 311 are arranged along the length direction of the battery device 1000. In this way, the multiple flow channel main bodies 311 can correspond to the battery cells 210 at different positions in the length direction of the battery device 1000 for heat exchange, thereby realizing independent and precise control of the temperature of the battery cells 210 at the corresponding positions, thereby precisely controlling the temperature difference between the battery cells 210 at different position areas in the length direction of the box body 100, and improving the temperature uniformity between the battery cells 210.

[0316] In the above technical solution, since the length-to-width ratio of the housing 100 is greater than 2, the battery device 1000 can have a narrow width, reducing space occupied in the width direction and facilitating assembly of the battery device 1000. By making the length of the housing 100 greater than twice its width, the flow channel bodies 311 of the multiple heat exchange flow channels 31 are arranged along the length direction of the battery device 1000. This can reduce temperature differences between the battery cells 210 within the housing, thereby improving temperature uniformity among the battery cells 210.

[0317] In some embodiments of the present invention, referring to Figure 2 and Figure 7 The ratio of the height dimension of the box body 100 in the third direction Z to the width dimension of the box body 100 in the second direction Y is less than 0.3, and the third direction Z intersects with the second direction Y.

[0318] For example, the outer contour of the box 100 is a rectangular parallelepiped, and the ratio of the height of the box 100 to the width of the box 100 is less than 0.3. The ratio of the height of the box 100 to the width 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, 0.15, etc. In this case, the box 100 is a short box with a height much smaller than its width.

[0319] In the above technical solution, since the ratio of the height to the width of the box body 100 is less than 0.3, the battery device 1000 can be made thinner, which is beneficial for the assembly of the battery device 1000 and reduces the space occupied in the height direction.

[0320] In some embodiments of the present invention, referring to Figure 2 and Figure 7 The thickness of the box body 100 in the third direction Z is greater than or equal to 20 mm and less than or equal to 50 mm.

[0321] For example, the thickness of the box body 100 may be 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, or 50 mm, etc.

[0322] In the above technical solution, the thickness of the box body 100 in the third direction Z is greater than or equal to 20 mm and less than or equal to 50 mm, which can make the battery device 1000 thinner, facilitate the assembly of the battery device 1000, and optimize the position layout of the battery device 1000.

[0323] In a second aspect, an embodiment of the present invention further provides an electrical device 1 comprising the battery device 1000 of any of the above embodiments.

[0324] In the above technical solution, since the electric device 1 is provided with the above-mentioned battery device 1000, and the heat exchange flow channel 31 of the battery device 1000 is formed with a flow channel body 311, the flow channel bodies 311 of the plurality of heat exchange flow channels 31 are arranged along the length direction of the battery device 1000, and the inlets 3103 and outlets 3104 of the plurality of heat exchange flow channels 31 are all located at the same end of the battery device 1000 in the first direction X, in this way, not only the inlets 3103 and outlets 3104 of the plurality of heat exchange flow channels 31 can be centrally arranged, the structure and layout of the external pipelines can be simplified, the difficulty of installation and maintenance can be reduced, and the heat exchange flow channels 31 are reduced. Less space is occupied, and different flow channel bodies 311 can also exchange heat with different areas of the battery device 1000 in the longitudinal direction, reducing the temperature difference between the battery cells 210 at different positions in the longitudinal direction of the battery device 1000, improving the temperature uniformity of the battery device 1000 in the longitudinal direction, improving the temperature uniformity between the battery cells 210 corresponding to the heat exchange of each heat exchange flow channel 31, improving the temperature uniformity between the battery cells 210 at the edge of the box 100 and the battery cells 210 near the middle area of ​​the box 100, and improving the temperature uniformity of the battery device 1000. At the same time, by making the number of battery cells 210 that are fitted for heat exchange in at least two flow channel bodies 311 different, the number of battery cells 210 that are fitted for heat exchange in each flow channel body 311 can be set according to the heat exchange requirements of the battery cells 210 in different heat exchange areas, thereby improving the heat exchange efficiency of the battery cells 210 in the corresponding heat exchange area. The number of battery cells 210 that are fitted for heat exchange can also be set according to the extended length of the flow channel body 311, thereby meeting the heat exchange requirements of each battery cell 210, improving the temperature uniformity between the battery cells 210, and thus improving the overall performance of the electrical device 1.

[0325] In some embodiments of the present invention, the electrical device 1 is a vehicle, and the first direction X is the front-rear direction of the vehicle.

[0326] It should be noted that in the prior art, the battery device 1000 includes a battery module, and the stacking direction of the battery cells 210 in the battery module is along the front-to-back direction of the vehicle. When a serpentine-bent water-cooling pipe is provided at the bottom of the battery module, the water-cooling pipe is divided into two parts, left and right, so that the water-cooling flow channel can provide a heat exchange surface for each battery cell.

[0327] But when the width of the battery monomer 210 does not match the width in the box 100 of the battery device 1000, causing the stacking direction of the battery monomers 210 of 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, left and right, and the following problems exist: because the water cooling pipe needs to have a certain bending radius when bending, there is at least a spacing of one flow channel width between the flow channels, and the battery monomers 210 located between the flow channels arranged adjacent 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.

[0328] In the utility model, the length direction of the box 100 of the battery device 1000 is the first direction X, the first direction X is the front-rear direction of the vehicle, the battery monomer assembly 200 in the box 100 includes multiple columns of battery monomers 210, and the multiple columns of battery monomers 210 are arranged in the front-rear direction, and each column of battery monomers 210 is arranged in a stacking manner along the left-right direction of the vehicle (the thickness direction of the battery monomer 210 is parallel to the left-right direction).

[0329] The heat exchange assembly 300 includes multiple heat exchange flow channels 31, the flow channel main bodies 311 of the multiple heat exchange flow channels 31 are arranged in a front-rear arrangement manner, specifically, the inlets 3103 and the outlets 3104 of the multiple heat exchange flow channels 31 are located at the front end of the battery device 1000, each heat exchange flow channel 31 has a flow channel main body 311, and the multiple flow channel main 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 main body 311 arrangement area, in the flow channel main body 311 arrangement area, the flow channel main body 311 extends along the left-right direction to exchange heat with each battery monomer 210, and then gradually extends to the front end of the battery device 1000.

[0330] In the above technical solution, the length direction of the battery device 1000 is along the front-rear direction of the vehicle, which can facilitate the arrangement of the battery device 1000 on the vehicle and the assembly of the battery device 1000.

[0331] The vehicle according to one specific embodiment of the utility model will be described below. Figure 1-Figure 7 The vehicle according to one specific embodiment of the utility model will be described below.

[0332] Referring to Figure 1 , the vehicle includes a battery device 1000, and the battery device 1000 is used for providing electric energy for the vehicle.

[0333] Specifically, as Figures 1-4As shown, the battery device 1000 includes a box body 100, a battery cell assembly 200 and a heat exchange assembly 300. 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 accommodating cavity, wherein the bottom plate 110 is in the shape of a plate, and the front end edge 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 an avoidance opening adapted to the shape of the mounting plate 113. When the upper cover 120 is arranged on the bottom plate 110, the mounting plate 113 covers the avoidance opening. A sealing member 140 is provided between the upper cover 120 and the bottom plate 110 for sealing the gap between the upper cover 120 and the bottom plate 110.

[0334] The box body 100 also includes a mounting beam 130, which is arranged in the accommodating cavity and fixed on the bottom plate 110. There are two mounting beams 130, which extend forward and backward and are respectively arranged on the left and right sides of the bottom plate 110 near the edge.

[0335] A plurality of ribs 111 are also formed on the base plate 110, and 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 at intervals in the front-to-back direction. The second ribs 111 extend front and back and are arranged on one side of the plurality of ribs 111 in the left-to-right direction. The plurality of ribs 111, the base plate 110 and the mounting beam 130 cooperate to define an accommodating groove 112 for accommodating a plurality of heat exchange tubes 30 of the heat exchange assembly 300.

[0336] Both the battery cell assembly 200 and the heat exchange assembly 300 are disposed within the accommodating cavity. There are multiple battery cell assemblies 200, each of which is arranged sequentially along the front-to-back direction. Each battery cell assembly 200 includes two columns of battery cells 210, which are arranged side by side along the front-to-back direction. The multiple battery cells 210 in each column of battery cells 210 are stacked sequentially along the left-to-right direction, with the thickness of the battery cells 210 extending along the left-to-right direction. The multiple battery cell assemblies 200 are each disposed between the two mounting beams 130.

[0337] The heat exchange assembly 300 is arranged between the base plate 110 and the battery cell assembly 200. The heat exchange assembly 300 includes multiple heat exchange tubes 30. Each heat exchange tube 30 is bent and extended and arranged in the accommodating groove 112, and the bending positions of the heat exchange tubes 30 are all arc bends. A heat exchange channel 31 is defined on the inner side of each heat exchange tube 30. At least a part of each heat exchange channel 31 is formed as a channel body 311. The channel bodies 311 of the multiple heat exchange tubes 30 are arranged in sequence along the front-to-back direction. The inlet 3103 and outlet 3104 of each heat exchange channel are arranged on the front side of the battery device 1000.

[0338] Each flow channel body 311 includes a first heat exchange portion 3111 and a second heat exchange portion 3112. The first heat exchange portion 3111 includes two horizontal portions 3101 and one vertical portion 3102. The two horizontal portions 3101 extend leftward and rightward and are arranged in the front-rear direction with a spacing. The vertical portion 3102 extends frontward and rearward and is arranged on one side of the two horizontal portions 3101 in the left-right direction. The front and rear ends of the vertical portion 3102 are connected to the end portions of the two horizontal portions 3101, respectively. At this time, the first heat exchange portion 3111 has a U shape that is open toward one side in the left-right direction.

[0339] The second heat exchange portion 3112 is arranged between the two horizontal portions 3101 of the first heat exchange portion 3111. The second heat exchange portion 3112 includes a plurality of horizontal portions 3101 that extend leftward and rightward and are arranged in the front-rear direction with a spacing and are sequentially connected by bending.

[0340] In one specific example, the number of heat exchange tubes 30 is two. The inner side of one of the heat exchange tubes 30 defines the first heat exchange flow channel 31a, and the inner side of the other heat exchange tube 30 defines the second heat exchange flow channel 31b. The first heat exchange flow channel 31a is entirely formed as a 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.

[0341] The second heat exchange flow channel 31b includes a first connecting portion 312, a flow channel body 311, and a second connecting portion 313 that are sequentially connected. The first connecting portion 312 and the second connecting portion 313 extend in the front-rear direction and are arranged in the left-right direction with a spacing. The first connecting portion 312 and the second connecting portion 313 are arranged on one side of the U-shaped opening of the first heat exchange portion 3111 of the first heat exchange flow channel 31a.

[0342] 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. 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. 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 that cooperates with the heat exchange tube 30. The area of the orthogonal projection of the heat exchange tube 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.

[0343] The heat exchange assembly 300 also includes a first sleeve 321 and a second sleeve 322. The first sleeve 321 extends left and right, and the two ends of the first sleeve 321 are respectively connected to the inlet 3103 of the first heat exchange channel 31a and the inlet 3103 of the second heat exchange channel 31b. The second sleeve 322 extends left and right, and the two ends of the second sleeve 322 are respectively connected to the outlet 3104 of the first heat exchange channel 31a and the outlet 3104 of the second heat exchange channel 31b.

[0344] The heat exchange assembly 300 also 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 the liquid inlet joint, one end of the liquid outlet pipe 332 is connected to the second sleeve 322 and the other end is connected to the liquid outlet joint, wherein the liquid inlet joint and the liquid outlet joint are both passed through and fixed on the mounting plate 113 at the front end of the base plate 110.

[0345] In the above technical solution, each column of battery cells 210 in the battery cell assembly 200 is stacked in the left-right direction, and the thickness direction of the battery cells 210 is along the left-right direction. The multiple heat exchange channels 31 of the heat exchange tube 30 all run from the front end of the battery device 1000 along the left and right sides to the rear, and then bend 90 degrees to continue to extend the heat exchange channels 31 in the left-right direction and gradually return to the front end of the battery device 1000. The channel bodies 311 of the multiple heat exchange channels 31 are arranged front to back, thereby achieving heat exchange between the heat exchange channels 31 and each battery cell 210, thereby improving the temperature uniformity between the battery cells 210.

[0346] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall 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), and the battery cell assembly (200) comprising a plurality of battery cells (210); A heat exchange component (300), the heat exchange component (300) is used for heat exchange with the battery cell (210), the heat exchange component (300) includes a plurality of heat exchange channels (31), the plurality of heat exchange channels (31) are connected in parallel, the inlets (3103) and outlets (3104) of the plurality of heat exchange channels (31) are arranged at the same end of the battery device (1000) in a first direction (X), the first direction (X) being the length direction of the battery device (1000), At least a portion of each heat exchange flow channel (31) is formed into a flow channel body (311), and a plurality of the flow channel bodies (311) are sequentially arranged along the first direction (X), and at least two of the flow channel bodies (311) are attached to different numbers of battery cells (210) for heat exchange.

2. The battery device (1000) according to claim 1, characterized in that In the direction along the first direction (X) and gradually away from the inlet (3103) and the outlet (3104), the number of the battery cells (210) that the plurality of flow channel bodies (311) contact for heat exchange decreases.

3. The battery device (1000) according to claim 2, characterized in that In the direction along the first direction (X) and gradually away from the inlet (3103) and the outlet (3104), the number of the battery cells (210) with which the plurality of flow channel bodies (311) are in contact for heat exchange decreases successively.

4. The battery device (1000) according to claim 1, characterized in that At least two of the flow channel bodies (311) have different heat exchange contact areas with the battery cell assembly (200).

5. The battery device (1000) according to claim 4, characterized in that In a direction along the first direction (X) and gradually away from the inlet (3103) and the outlet (3104), the heat exchange contact area between the plurality of flow channel bodies (311) and the battery cell assembly (200) decreases.

6. The battery device (1000) according to claim 5, characterized in that In the direction along the first direction (X) and gradually away from the inlet (3103) and the outlet (3104), the heat exchange contact area between the plurality of flow channel bodies (311) and the battery cell assembly (200) gradually decreases.

7. The battery device (1000) according to claim 1, characterized in that At least two of the flow channel bodies (311) have different outer contour widths in the first direction (X).

8. The battery device (1000) according to claim 7, characterized in that In the direction along the first direction (X) and gradually away from the inlet (3103) and the outlet (3104), the outer contour width of the plurality of flow channel bodies (311) in the first direction (X) becomes smaller.

9. The battery device (1000) according to claim 8, characterized in that In the direction along the first direction (X) and gradually away from the inlet (3103) and the outlet (3104), the outer contour widths of the plurality of flow channel bodies (311) in the first direction (X) decrease successively.

10. The battery device (1000) according to claim 8, characterized in that The number of the heat exchange flow channels (31) is two, and the heat exchange flow channels (31) include a first heat exchange flow channel (31a) and a second heat exchange flow channel (31b). The flow channel body (311) of the first heat exchange flow channel (31a) is located closest to the inlet (3103) and the outlet (3104). The ratio of the outer contour width of the channel body (311) of the second heat exchange channel (31b) in the first direction (X) to the total outer contour width of all battery cell assemblies (200) of the battery device (1000) in the first direction (X) is greater than or equal to 1 / 3 and less than 1 / 2.

11. The battery device (1000) according to claim 1, 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 flow channel body (311) of the first heat exchange flow channel (31a) is arranged close to the inlet (3103) and the outlet (3104). Each of the heat exchange channels (31) extends from the inlet (3103) to 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.

12. The battery device (1000) according to claim 1, 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 first direction (X).

13. The battery device (1000) according to claim 12, characterized in that The first connection portion (312) is closer to the edge of the box (100) in a second direction (Y) than the second connection portion (313), and the second direction (Y) intersects with the first direction (X).

14. The battery device (1000) according to claim 12, 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 second direction (Y).

15. The battery device (1000) according to claim 1, 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.

16. The battery device (1000) according to any one of claims 1 to 15, 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 a first direction (X), and the transverse portion (3101) extends along a second direction (Y), wherein the second direction (Y) is the width direction of the battery device (1000); wherein the longitudinal portion (3102) is closer to the edge of the box (100) than the transverse portion (3101).

17. The battery device (1000) according to claim 16, characterized in that The plurality of transverse portions (3101) in the flow channel body (311) are spaced apart in the first direction (X) 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).

18. The battery device (1000) according to any one of claims 1 to 15, 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).

19. The battery device (1000) according to claim 18, characterized in that The second heat exchange portion (3112) includes a plurality of transverse portions (3101), wherein the plurality of transverse portions (3101) extend along a second direction (Y) and are arranged at intervals in the first direction (X), wherein the second direction (Y) is the width direction of the battery device (1000), and the plurality of transverse portions (3101) of the second heat exchange portion (3112) are bent and connected in sequence along the first direction (X).

20. The battery device (1000) according to claim 18, 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 a second direction (Y) and being spaced apart in the first direction (X), the second direction (Y) being the width direction of the battery device (1000), and the longitudinal portion (3102) extending along the first direction (X) and being connected between the two transverse portions (3101).

21. The battery device (1000) according to claim 1, characterized in that The heat exchange assembly (300) comprises a plurality of heat exchange tubes (30), each of the heat exchange tubes (30) being bent and extended to define a heat exchange flow channel (31).

22. 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 a second direction (Y), and the plurality of rows of battery cells (210) are arranged along the first direction (X) to form the battery cell assembly (200). The heat exchange assembly (300) is arranged on at least one side of the battery cell assembly (200) in a third direction (Z), wherein the second direction (Y) is the width direction of the battery device (1000), and the first direction (X), the second direction (Y), and the third direction (Z) are arranged at an angle to each other.

23. The battery device (1000) according to claim 22, characterized in that The width of the heat exchange channel (31) is a first width, the dimension of the battery cell (210) in the first 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.

24. The battery device (1000) according to claim 22, characterized in that The heat exchange assembly (300) includes a plurality of heat exchange tubes (30), each of the heat exchange tubes (30) defining a heat exchange channel (31). 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.

25. The battery device (1000) according to claim 1, characterized in that The ratio of the length dimension of the box body (100) in the first direction (X) to the width dimension of the box body (100) in the second direction (Y) is greater than 2, and the first direction (X) intersects with the second direction (Y).

26. The battery device (1000) according to claim 1, characterized in that The ratio of the width dimension of the box body (100) in the second direction (Y) to the height dimension of the box body (100) in the third direction (Z) is less than 0.3, and the first direction (X), the second direction (Y) and the third direction (Z) intersect with each other.

27. The battery device (1000) according to claim 1, characterized in that The thickness of the box body (100) in a third direction (Z) is greater than or equal to 20 mm and less than or equal to 50 mm, and the third direction (Z) intersects with the first direction (X).

28. An electrical device (1), characterized in that: A battery device (1000) comprising any one of claims 1-27.

29. The electrical device (1) according to claim 28, characterized in that The electrical device (1) is a vehicle, and the first direction (X) is the front-rear direction of the vehicle.

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