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 the battery monomer assembly comprises a plurality of battery monomers; the heat exchange assembly comprises a plurality of heat exchange flow channels, at least part of each heat exchange flow channel forms a flow channel body, the flow channel bodies of at least two heat exchange flow channels are arranged in the first direction, each heat exchange flow channel comprises an extending part and a bent part, at least part of the extending parts of the multiple heat exchange flow channels extend in the first direction, and at least part of the bent part extends in the second direction. The bending part bends and extends in a reciprocating manner in the second direction, and the extending part wraps the outer side of the bending part in the first plane; wherein the first direction and the second direction are both located in the first plane, and the heat exchange assembly is arranged on at least one side of the battery monomer assembly in the third direction. In the technical mode, the temperature uniformity in the battery device can be improved, and the heat exchange efficiency of the battery monomer assembly can also be 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] To ensure proper battery operation and longevity, existing batteries are typically equipped with heat exchangers. These heat exchangers exchange heat with the battery cells to regulate the temperature of each cell, thereby ensuring battery life. However, current improvements in temperature uniformity across multiple cells within a battery are needed. 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 including the battery device, which can improve temperature uniformity within the battery device and enhance the heat exchange efficiency of the battery cell assembly.

[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 includes a plurality of heat exchange channels, at least a portion of each heat exchange channel is formed as a channel body, and the channel bodies of at least two heat exchange channels are arranged along a first direction, and each heat exchange channel includes an extension portion and a bending portion, at least a portion of the extension portions of the plurality of heat exchange channels extends along the first direction, the bending portion bends and extends back and forth in a second direction, and the extension portion is wrapped around the outside of the bending portion in the first plane; wherein the first direction and the second direction are both located in the first plane, and the heat exchange assembly is arranged on at least one side of the battery cell assembly in the third direction for heat exchange with the battery cell, and the first direction, the second direction and the third direction intersect with each other.

[0005] In the above-described technical approach, since the heat exchange channel is formed with a channel body, and the channel bodies of at least two heat exchange channels are arranged along the length of the battery device, different channel bodies can exchange heat with different areas of the battery device along the length, thereby reducing temperature differences between battery cells at different locations along the length of the battery device and improving the temperature uniformity of the battery device along the length. Furthermore, since the heat exchange channel includes an extension portion and a bend portion, with the extension portion being disposed outside the bend portion, the extension portion can exchange heat with peripheral battery cells near the edge of the case, and the bend portion can exchange heat with battery cells near the middle of the case. When the heat exchange medium flows sequentially into the extension portion and the bend portion, the internal and external temperature differences between the peripheral battery cells near the edge of the case and the battery cells near the middle of the case caused by heat exchange with the environment can be compensated, thereby making the heat exchange effects 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 thereby, to a certain extent, increasing the service life of the battery device.

[0006] In some embodiments, the extension portions of the multiple heat exchange channels constitute four extension segments, which are arranged in sequence along the circumference of the heat exchange component, and the four extension segments together cover the bending portions of the multiple heat exchange channels.

[0007] In the above technical method, the extension parts of multiple heat exchange channels constitute four extension sections, and the four extension sections are arranged in sequence along the circumference of the heat exchange component and cover the bent part. As a result, the structure of the heat exchange channel can be further compacted, and the length of the heat exchange channel in the circumferential direction of the box body can be extended to fit the heat exchange with the peripheral battery cells arranged near the edge of the box body, thereby improving the thermal management efficiency of the peripheral battery cells and improving the temperature uniformity performance between the peripheral battery cells.

[0008] In some embodiments, the four extension segments are respectively a first extension segment, a second extension segment, a third extension segment and a fourth extension segment. The first extension segment and the third extension segment both extend along the first direction and are arranged at intervals in the second direction. The second extension segment and the fourth extension segment both extend along the second direction and are arranged at intervals in the first direction.

[0009] In the above technical solution, the first extension section, the second extension section, the third extension section and the fourth extension section can enclose a rectangular frame structure, which can not only improve the integrity of the heat exchange component, compact the structure of the heat exchange flow channel, increase the heat exchange area between the heat exchange component and the battery cell component, and improve the heat exchange efficiency, but also can exchange heat with all the peripheral battery cells through the four extension sections, thereby improving the heat exchange efficiency and temperature uniformity of the peripheral battery cells.

[0010] In some embodiments, in the circumferential direction of the heat exchange component, two adjacent extensions are connected or arranged at intervals.

[0011] In the above technical solution, the two adjacent extensions are connected, which can enhance the integrity of the heat exchange component and improve the structural strength of the heat exchange component. The two adjacent extensions are arranged at intervals, which can reduce the mutual interference between adjacent heat exchange channels and facilitate the processing and manufacturing of the heat exchange channels.

[0012] In some embodiments, each heat exchange channel includes at least two extension portions, and the multiple extension portions of the heat exchange channel are connected in sequence. The extension directions of the two connected extension portions are different, and the bending portion is connected to the downstream side or upstream side of the multiple extension portions in the fluid flow direction.

[0013] In the above technical solution, the multiple extensions of each heat exchange channel are connected in sequence, and the bending parts are connected to the downstream side or upstream side of the multiple extensions in the fluid flow direction. This not only facilitates the multiple extensions of the multiple heat exchange channels to cooperate and surround the bending parts, but also reduces the internal and external temperature difference between the battery cells caused by heat dissipation to the environment, and improves the temperature uniformity between the peripheral battery cells near the edge of the box and the internal battery cells.

[0014] In some embodiments, the flow channel body includes two extension portions and a bending portion, the two extension portions are respectively a first extension portion and a second extension portion, the first extension portion extends along the second direction, and the second extension portion extends along the first direction, the first extension portion, the second extension portion and the bending portion are connected in sequence, and the bending portion is arranged on the side of the two extension portions away from the edge of the box body.

[0015] In the above technical solution, since the two extension parts of the flow channel main body are connected by bending, and the bending part is arranged on the inner side of the two extension parts, the structure of the flow channel main body can be compacted, the flow channel length of the flow channel main 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 main 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 main body is located can be improved.

[0016] In some embodiments, the bending 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 bending portion are bent and connected in sequence along the first direction.

[0017] In the above technical solution, the bending portion includes multiple transverse portions, which can increase the heat exchange area of ​​the bending portion, improve the heat exchange efficiency, evenly distribute the heat of the bending portion, and improve the temperature uniformity between the battery cells. In addition, the multiple transverse portions are bent and connected in sequence, which can simplify the structure of the bending portion and facilitate the processing and forming of the bending portion.

[0018] In some embodiments, the connection position of two adjacent transverse portions is bent into a semicircular arc shape.

[0019] In the technical scheme, the connecting position of the two transverse parts of the bending part is bent into a semicircular arc shape, which not only allows the two transverse parts to be arranged in parallel and spaced apart, compactly arranges the structure of the bending part, 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 bending part, reduces the stress concentration at the bending position, and prolongs the service life of the heat exchange assembly.

[0020] In some embodiments, the connecting position of the first extension part and the second extension part is bent into a quarter circular arc shape, and the connecting position of the second extension part and the bending part is bent into a quarter circular arc shape.

[0021] In the technical scheme, the connecting position of the first extension part and the second extension part is bent into a quarter circular arc shape, and the connecting position of the second extension part and the bending part is bent into a quarter circular arc shape.

[0022] In some embodiments, 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.

[0023] In the technical scheme, 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, so that the inlets and outlets of the plurality of heat exchange flow channels can be arranged centrally, thereby facilitating the connection of the plurality of heat exchange flow channels to the external pipeline, simplifying the structure and layout of the external pipeline, reducing the installation and maintenance difficulty, reducing the arrangement space of the inlets, outlets and external pipeline, compacting the structure, reducing the space occupation, improving the space utilization, improving the temperature uniformity between the battery monomers corresponding to the heat exchange of each heat exchange flow channel, improving 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, reducing the probability of local temperature being too high or too low in the battery device, and improving the uniform temperature performance of the battery device.

[0024] In some embodiments, the inlets of the plurality of heat exchange flow channels are communicated, and the outlets of the plurality of heat exchange flow channels are communicated.

[0025] In the technical scheme, the inlets of the plurality of heat exchange flow channels are communicated, and the outlets are also communicated, which not only allows the heat exchange medium to be uniformly distributed in the plurality of heat exchange flow channels, improves the temperature uniformity of the battery device, but also reduces the flow resistance, improves the heat exchange efficiency, and reduces the risk of thermal runaway of the battery device.

[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 connecting portion and a second connecting portion, the first connecting portion and the second connecting portion being connected to the two ends of the channel body of the second heat exchange channel, respectively, and the ends of the first connecting portion and the second connecting portion away from the channel body respectively forming the inlet and outlet of the second heat exchange channel. Thus, the inlet and outlet of the second heat exchange channel can be arranged on the other side of the first heat exchange channel away from the channel body of the second heat exchange channel, which is conducive to centrally arranging the inlet and outlet of the first heat exchange channel with the inlet and outlet of the second heat exchange channel, facilitating centralized connection of external pipelines, and having a compact structure, convenient maintenance, and reduced space occupation. In addition, the first connecting portion and the second connecting portion can increase the heat exchange area of ​​the second heat exchange channel and improve the heat exchange efficiency. The first connecting portion and the second connecting portion can reduce the temperature difference between the battery cells near the edge of the box and in contact with the first connecting portion and the second connecting portion for heat exchange and the battery cells near the middle of the box. It can also reduce the probability of local over-temperature or local over-temperature in the battery device, and improve the temperature uniformity between the battery cells.

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

[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 first connection portion is in contact with and exchanges heat with the outermost battery cells arranged in the second direction in the battery cell assembly.

[0033] In the above technical solution, the first connecting portion is in contact with the outermost battery cell in the second direction for heat exchange, which can increase the contact area between the outermost battery cell in the second direction and the heat exchange channel, improve the heat exchange efficiency of the outermost battery cell in the second direction, balance the internal and external temperature differences between the battery cells caused by the ambient temperature, and thereby improve the temperature uniformity between the battery cells.

[0034] In some embodiments, a distance between the first connection portion and the second connection portion in the second direction is smaller than a thickness of the battery cell in the second direction.

[0035] In the above technical solution, since the distance between the first connection part and the second connection part in the second direction is smaller than the thickness of the battery cell in the second direction, the first connection part can exchange heat with the outermost battery cell in the second direction, and the second connection part can exchange heat with the battery cell adjacent to the first connection part, so that each battery cell can be in contact with the heat exchange channel for heat exchange, avoiding the situation where the battery cell between the first connection part and the second connection part can neither exchange heat with the first connection part nor with the second connection part, thereby improving the temperature uniformity between the battery cells.

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

[0037] In the above technical solution, the ratio of the extension lengths of any two heat exchange channels is set to 0.8-1.2, so that the extension lengths of any two heat exchange channels can be closer, so that the flow distance of the heat exchange medium in each heat exchange channel is more uniform, and the flow resistance in each heat exchange channel is close, so that the heat exchange efficiency of each heat exchange channel is uniform, thereby improving the temperature uniformity between the battery cells corresponding to each heat exchange channel.

[0038] 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. There are multiple battery cell assemblies, and multiple battery cell assemblies are arranged in sequence along the first direction.

[0039] 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 can be adapted more flexibly, the space in the width direction of the box can be fully utilized, and the energy density of the battery device can be improved. 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 being in contact with the flow channel body in the corresponding heat exchange area, thereby improving the temperature uniformity between the battery cells.

[0040] 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.

[0041] In the above technical solution, since the ratio of the first width of the heat exchange channel to the second width of the battery 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.

[0042] 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.

[0043] 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.

[0044] In some embodiments, the heat exchange component is disposed in the box.

[0045] In the above technical solution, the heat exchange assembly is placed inside the box, which allows the heat exchange assembly to directly contact the battery cells for heat exchange, reducing heat loss and improving heat exchange efficiency. In addition, the box can protect the heat exchange assembly, thereby increasing its service life.

[0046] In some embodiments, the heat exchange assembly includes a heat exchange tube, which defines a heat exchange flow channel. The bottom plate of the box is formed with multiple ribs, and the multiple ribs cooperate to define a bent and extended receiving groove, and the heat exchange tube is arranged in the receiving groove.

[0047] In the above technical solution, since the heat exchange tubes of the heat exchange assembly are arranged in the receiving grooves defined by multiple ribs on the base plate, the ribs can not only improve the structural strength of the base plate and enhance the supporting stability of the base plate on the battery cell assembly, but also reduce the pressure of the battery cell assembly on the heat exchange tubes, thereby improving the service life of the heat exchange assembly.

[0048] 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.

[0049] In the above embodiment, the battery device of the first aspect is set, and the multiple heat exchange channels of the heat exchange assembly are formed with a channel body, and the channel bodies of at least two heat exchange channels are arranged along the length direction of the battery device. In this way, different channel bodies can exchange heat with different areas of the battery device in the length direction, thereby reducing the temperature difference between battery cells at different positions in the length direction of the battery device and improving the temperature uniformity of the battery device in the length direction. At the same time, since the heat exchange channel includes an extension part and a bending part, and the extension part is wrapped on the outside of the bending part, the extension part can block other debris or impurities from entering the inside of the extension part, and can also exchange heat with battery cells closer to the edge of the box, thereby improving the thermal management efficiency of the battery cells at the edge of the box, and can also compact the structure of the heat exchange channel, increase the length of the heat exchange channel, and improve the heat exchange efficiency of the battery cell assembly, thereby improving the overall performance of the electrical device.

[0050] In some embodiments, the electrical device is a vehicle, and the first direction is the front-rear direction of the vehicle.

[0051] In the above technical solution, the length direction of the battery device is along the front-rear direction of the vehicle, which can facilitate the arrangement of the battery device on the vehicle and the assembly of the battery device.

[0052] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1is a schematic structural diagram of a vehicle according to an embodiment of the present utility model;

[0054] Figure 2 is a structural schematic diagram of a battery device according to an embodiment of the present utility model;

[0055] Figure 3 This is an exploded view of a battery device according to an embodiment of the present invention with only the upper cover blown open;

[0056] Figure 4 is an exploded view of a battery device according to an embodiment of the present utility model;

[0057] Figure 5 is 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;

[0058] Figure 6 yes Figure 5 A partial enlarged view of the battery cell assembly and the heat exchange assembly shown in FIG;

[0059] Figure 7 FIG. 4 is an exploded view of a battery device according to an embodiment of the present invention from another angle.

[0060] Reference numerals:

[0061] 1. Electrical devices;

[0062] 1000, battery device; 2000, controller; 3000, motor;

[0063] 100, box body;

[0064] 110, bottom plate; 111, rib; 112, receiving groove; 113, mounting plate;

[0065] 120, upper cover; 130, mounting beam; 140, sealing member;

[0066] 200, battery cell assembly; 210, battery cell;

[0067] 300, heat exchange component;

[0068] 30. Heat exchange tube;

[0069] 31, heat exchange channel; 31a, first heat exchange channel; 31b, second heat exchange channel;

[0070] 3101, horizontal part; 3103, import; 3104, export;

[0071] 311, flow channel body;

[0072] 312, first connecting portion; 313, second connecting portion;

[0073] 321, first sleeve; 322, second sleeve; 331, liquid inlet pipe; 332, liquid outlet pipe;

[0074] 41. extension portion; 42. bending portion;

[0075] 4a, first extension section; 4b, second extension section; 4c, third extension section; 4d, fourth extension section. DETAILED DESCRIPTION

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] In the description of the embodiments of the present invention, the term "plurality" refers to more than two (including two).

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] As an example, the box can include a first box and a second box. The first box and the second box are buckled so that the inside of the box forms a closed space to accommodate the battery monomer assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0090] As an example, the box can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that the inside of the box forms a closed space to accommodate the battery monomer assembly.

[0091] As an example, the box can be part of the chassis structure of the vehicle. For example, the top cover of the box can be at least part of the floor of the vehicle, or the frame of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0092] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box, at least one side of the box is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0093] The battery monomer mentioned in the embodiment of the utility model can include lithium ion secondary battery, lithium ion primary battery, lithium-sulfur battery, sodium lithium ion battery, sodium ion battery or magnesium ion battery, etc. The embodiment of the utility model is not limited to this. The battery monomer can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The embodiment of the utility model is not limited to this. The battery monomer is generally divided into three types according to the packaging method: cylindrical battery monomer, square battery monomer and soft package battery monomer. The embodiment of the utility model is not limited to this.

[0094] As an example, the battery monomer can generally include a shell, an electrode assembly and an electrolyte, the shell is used to accommodate the electrode assembly and the electrolyte, and the shell is provided with at least one positive pole and at least one negative pole. The electrode assembly includes one or more electrode assemblies, and the electrode assembly is formed by stacking or winding the positive pole, the negative pole and the separator film.

[0095] The technical solutions described in the embodiment of the utility model are applicable to various electric devices using battery devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0096] In the related art, in order to make the battery device work in a suitable temperature range, a heat exchange component is usually arranged to exchange heat with the battery monomers of the battery device to adjust the temperature of the battery monomers. In the related art, the number of battery monomers in the battery device is large, and the temperature difference between the battery monomers is large, which affects the overall performance of the battery device. Therefore, how to improve the temperature uniformity between the battery monomers in the battery device is a technical problem to be solved.

[0097] Based on the above considerations, in order to improve the temperature uniformity between the plurality of battery monomers in the battery device, the utility model discloses a kind of battery device, and the heat exchange component of battery device is arranged in box for heat exchange with battery monomer component, and heat exchange component includes multiple heat exchange flow channels, each heat exchange flow channel has flow channel main body, and multiple flow channel main bodies are arranged along the length direction of box. Therefore, different flow channel main body can be heat exchanged with the battery monomer of different area in battery device, so that the temperature difference between the battery monomer of different position in battery device can be reduced, the temperature uniformity in battery device is improved, heat exchange flow channel can also be conveniently arranged, heat exchange flow channel is contacted with each battery monomer and exchanges heat, and the temperature uniformity between the plurality of battery monomers is improved. Meanwhile, heat exchange flow channel includes extension and bending part, and extension is wrapped in the outside of bending part, and extension can block other sundries or impurities to enter the inside of extension, and heat exchange can also be carried out with the battery monomer closer to the edge of box, improve the heat management efficiency of the battery monomer of the edge of box, compact the structure of heat exchange flow channel, improve the length of heat exchange flow channel, and improve the heating and cooling efficiency of battery monomer component.

[0098] The utility model embodiment provides a kind of electric device using the battery device of the present disclosure as power supply, and electric device can be but not limited to mobile phone, tablet computer, notebook computer, electric toy, electric tool, electric car, electric car, ship, spacecraft and so on.Electric toy can include fixed or mobile electric toy, for example, game machine, electric car toy, electric ship toy and electric plane toy and so on, spacecraft can include airplane, rocket, space shuttle and spaceship and so on.

[0099] The following embodiments are described in detail for the convenience of explanation, taking the electric device 1 as a vehicle as an example, the structure of the electric device 1 and the battery device 1000 of the utility model is introduced in detail.

[0100] Please refer to Figure 1 , Figure 1The 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.

[0101] 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.

[0102] 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.

[0103] The present invention provides a battery device 1000, such as Figure 2-Figure 7As shown, the battery device 1000 includes: a box 100, a battery cell assembly 200 and a heat exchange assembly 300. The battery cell assembly 200 is arranged in the box body 100, and the battery cell assembly 200 includes a plurality of battery cells 210; the heat exchange assembly 300 includes a plurality of heat exchange channels 31, at least a portion of each heat exchange channel 31 is formed into a channel body 311, and the channel bodies 311 of at least two heat exchange channels 31 are arranged along the first direction X, and each heat exchange channel 31 includes an extension portion 41 and a bending portion 42, at least a portion of the extension portions 41 of the plurality of heat exchange channels 31 extends along the first direction X, and the bending portion 42 bends and extends back and forth in the second direction Y, and the extension portion 41 is wrapped around the outside of the bending portion 42 in the first plane; wherein the first direction X and the second direction Y are both located in the first plane, and the heat exchange assembly 300 is arranged on at least one side of the battery cell assembly 200 in the third direction Z for heat exchange with the battery cell 210, and the first direction X, the second direction Y and the third direction Z intersect with each other.

[0104] like Figure 2-Figure 4 As shown, the housing 100 defines a receiving cavity, and the battery cell assembly 200 is disposed in the receiving cavity of the housing 100. The heat exchange assembly 300 can be disposed in the receiving cavity of the housing 100 or outside the housing 100. In one example, the housing 100 can be made of an aluminum alloy to reduce the weight of the housing 100 while ensuring the structural strength of the housing 100, thereby increasing the energy density of the battery device 1000.

[0105] In other examples, the box body 100 may also be a composite material. The composite material of the box body 100 may be a material with high strength, light weight and good corrosion resistance.

[0106] The battery cell assembly 200 includes a plurality of battery cells 210. The plurality of battery cells 210 of the battery cell assembly 200 may be arranged sequentially along the length, width, and / or thickness of the battery cells 210. The battery cell assembly 200 may 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 invention includes but is not limited to the several embodiments listed above. Any two battery cells 210 in the plurality of battery cells 210 in the battery cell assembly 200 may be connected in series or in parallel.

[0107] like Figure 4As shown, the heat exchange assembly 300 is arranged on one side of the battery cell assembly 200 in the third direction Z, or the heat exchange assembly 300 is arranged on both sides of the battery cell assembly 200 in the third direction Z. For example, if the third direction Z is the up-down direction, the heat exchange assembly 300 can be arranged on the upper or lower side of the battery cell assembly 200, or on both the upper and lower sides of the battery cell assembly 200. This facilitates heat exchange between the heat exchange assembly 300 and each battery cell 210, thereby improving temperature uniformity.

[0108] The heat exchange assembly 300 is used for heat exchange with the battery cells 210. For example, the heat exchange assembly 300 can be directly attached to the battery cells 210 for heat exchange, or the heat exchange assembly 300 can be attached to the battery cells 210 at intervals for heat exchange. The heat exchange assembly 300 can include a cold plate, which can define a heat exchange channel 31. The heat exchange assembly 300 can also include a heat exchange tube 30, which can define a heat exchange channel 31. The heat exchange channel 31 is used to conduct a heat exchange medium. The heat exchange medium can be a liquid, such as water or a mixture of water and other liquids. As the heat exchange medium flows along the heat exchange channel, the heat exchange medium can remove heat generated by the battery cells or heat the battery cells.

[0109] 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.

[0110] like Figure 5 As shown, multiple heat exchange channels 31 are arranged in parallel with each other, that is, the inlet 3103 of each heat exchange channel 31 is connected to the liquid inlet of the heat exchange assembly 300, and the outlet 3104 of each heat exchange channel 31 is connected to the liquid outlet of the heat exchange assembly 300. In this way, the flow rate of the heat exchange medium in each heat exchange channel 31 can be made consistent, achieving uniform heat exchange for the battery cells 210. In addition, the pressure drop in a single heat exchange channel 31 can be reduced, thereby improving heat exchange efficiency.

[0111] 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.

[0112] In some examples, the total length of extension in the flow channel body 311 is greater than the total length of extension of the rest of the flow channel of the heat exchange flow 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 rest of the flow channel of the heat exchange flow channel 31 except the flow channel body 311.

[0113] In some examples, each heat exchange flow channel 31 has a flow channel body 311, and for a heat exchange flow channel 31, the heat exchange flow channel 31 can be only a part of the flow channel formed into the flow channel body 311, or the heat exchange flow channel 31 can be the entire flow channel collectively formed into the flow channel body 311.

[0114] Among the plurality of flow channel bodies 311, at least two flow channel bodies 311 are arranged along the first direction X, that is, a part of the plurality of flow channel bodies 311, for example, two, three or four flow channel bodies 311, can be arranged along the length direction of the battery device 1000, or all of the plurality of flow channel bodies 311 can be arranged along the length direction of the battery device 1000.

[0115] For example, when the plurality of heat exchange flow channels 31 are integrally formed into the flow channel body 311, the plurality of heat exchange flow channels 31 can be arranged along the length direction of the battery device 1000, and when the plurality of heat exchange flow channels 31 are partially formed into 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.

[0116] The first direction X is the length direction of the battery device 1000, and the plurality of flow channel bodies 311 are arranged along the length direction of the battery device 1000. The plurality of battery monomers 210 can be divided into a plurality of regions according to the length direction of the battery device 1000, and one or more flow channel bodies 311 are arranged in each region for heat exchange with the battery monomers 210 in the region.

[0117] Since the plurality of heat exchange flow channels 31 are formed into the flow channel body 311, and the flow channel body 311 is arranged more concentratedly than the flow channel of the other part of the heat exchange flow channel 31, the flow channel body 311 can undertake more heat exchange functions in the heat exchange flow channel 31. Therefore, by limiting the arrangement direction of the flow channel body 311 in different heat exchange flow channels 31, the heat exchange efficiency between different heat exchange flow channels 31 and the corresponding heat exchange region can be accurately controlled, and by arranging the flow channel body 311 in the heat exchange flow channel 31 along the length direction of the box body 100, the heat exchange efficiency between the heat exchange flow channel 31 and the battery monomer 210 in the box body 100 can be improved while meeting the compact arrangement of the battery monomer 210 in the long box body 100.

[0118] Furthermore, since the length of the battery device 1000 is longer than its width, if the technical solution in the related art is adopted, the multiple heat exchange channels of the heat exchange assembly are arranged along the width of the housing, with each heat exchange channel extending back and forth along the length of the housing for heat exchange with the battery cells. Since the reciprocating extension of the heat exchange channel requires the heat exchange channel to be bent at a certain bending radius, 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.

[0119] Therefore, the present invention arranges the flow channel main body 311 of multiple heat exchange channels 31 along the length direction of the box body 100, which is 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.

[0120] 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, the 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 this channel section is relatively long. When the heat exchange medium flows from one end to the other end in this channel section, since the heat exchange medium needs to exchange heat with multiple battery cells arranged in sequence along 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 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 both ends of the length direction of the battery device is also larger.

[0121] 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.

[0122] In addition, the flow channels of the flow channel main body 311 of the utility model 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 accurately 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 between the battery cells 210.

[0123] like Figure 5 As shown, each heat exchange channel 31 includes an extension portion 41 and a bend portion 42. Specifically, each heat exchange channel 31 may have one or more extension portions 41, and multiple heat exchange channels 31 may have multiple extension portions 41. Among the multiple extension portions 41 of the multiple heat exchange channels 31, only a portion of the extension portions 41 may extend along the first direction X, or all the extension portions 41 of the multiple heat exchange channels 31 may extend along the first direction X. The bend portion 42 bends and extends back and forth in the second direction Y. For example, the bend portion 42 may extend in the second direction Y in a circuitous manner to form an S-shape, a V-shape, or a U-shape.

[0124] The extension portion 41 is disposed outside the bend portion 42 in the first plane. That is, the extension portion 41 and the bend portion 42 are disposed in the same plane, and the extension portion 41 is disposed around the bend portion 42 to surround the bend portion 42. The extension portion 41 may surround a portion of the bend portion 42, or may completely surround the bend portion 42. For example, the extension portions 41 extending along the first direction X may be disposed on both sides of the bend portion 42 in the second direction Y, so as to surround the bend portion 42 from both sides in the second direction Y.

[0125] Among them, the reciprocating bending extension of the bending portion 42 can not only increase the extension length of the bending portion 42, extend the flow path of the heat exchange medium, and improve the heat exchange efficiency, but also increase the arrangement density of the heat exchange flow channel 31 and improve the temperature uniformity between the battery cells 210.

[0126] The extension portion 41 is disposed outside the bent portion 42. Therefore, the extension portion 41 is disposed closer to the edge of the housing 100 than the bent portion 42. The edge of the housing 100 refers to the location where the housing 100 intersects with the external environment of the housing 100, and the edge of the housing 100 is closer to the external environment of the housing 100 than other parts of the housing 100. In this way, the extension portion 41 can exchange heat with the peripheral battery cells 210 located closer to the edge of the housing 100 among the multiple battery cells 210, and the bent portion 42 can exchange heat with the battery cells 210 located closer to the center of the housing 100 among the multiple battery cells 210.

[0127] It should be noted that as the heat exchange medium flows in the heat exchange channel 31, the temperature of the heat exchange medium gradually changes, resulting in a gradual decrease in the heat exchange effect. Specifically, when heating the battery cell, the temperature of the heat exchange medium gradually decreases as the heat exchange medium flows, and when cooling the battery cell, the temperature of the heat exchange medium gradually increases as the heat exchange medium flows. At the same time, the peripheral battery cells 210 near the edge of the box body 100 are closer to the external environment of the box body 100 than the internal battery cells 210. Therefore, the peripheral battery cells 210 near the edge of the box body 100 have more heat exchange with the external environment than the internal battery cells 210 near the middle of the box body 100, and heat dissipation is faster.

[0128] 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 extension portion 41 of the heat exchange channel 31 and then flow to the bent portion 42 of the heat exchange channel 31. The heat exchange medium can also first enter the bent portion 42 of the heat exchange channel 31 and then flow to the extension portion 41. When the heat exchange medium first enters the bent portion 42 and then flows to the extension portion 41, the internal battery cell 210 near the middle of the box body 100 can be cooled in the bent portion 42 first, and then enters the extension portion 41 to cool the peripheral battery cell 210 near the edge of the box body 100. Since the peripheral battery cell 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 cell 210 is better than that of the internal battery cell 210. Therefore, the heat exchange medium with a lower temperature in the bent portion 42 can better meet the heat dissipation requirements of the battery cell 210 in the middle of the box body 100. At the same time, due to 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 extension portion 41 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.

[0129] 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 extension 41 of the heat exchange channel 31 and then flow toward the bent portion 42 of the heat exchange channel 31. Alternatively, the heat exchange medium may first enter the bent portion 42 of the heat exchange channel 31 and then flow toward the extension 41. For example, when the heat exchange medium flows from the extension 41 to the bent portion 42, the heat exchange medium may first heat the peripheral battery cells 210 near the edge of the housing 100 within the extension 41, and then enter the bent portion 42 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 bend 42 can cooperate with the heat generated by the battery cells 210 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.

[0130] In addition, the extension portion 41 wrapped around the outer side of the bending portion 42 can also compact the arrangement structure of multiple heat exchange channels 31, arranging more or longer heat exchange channels 31 in the same area, thereby improving the heating and cooling rates of the battery cells 210.

[0131] In the above technical solution, since the heat exchange channel 31 is formed with a channel body 311, and the channel bodies 311 of at least two heat exchange channels 31 are arranged along the length direction of the battery device 1000, different channel bodies 311 can exchange heat with different areas of the battery device 1000 in the length direction, thereby reducing the temperature difference between the battery cells 210 at different positions in the length direction of the battery device 1000 and improving the temperature uniformity of the battery device 1000 in the length direction. At the same time, since the heat exchange channel 31 includes an extension portion 41 and a bending portion 42, and the extension portion 41 is wrapped around the outside of the bending portion 42, the extension portion 41 can exchange heat with the peripheral battery cells 210 near the edge of the box body 100 among the multiple battery cells 210, and the bending portion 42 can exchange heat with the battery cells 210 near the middle of the box body 100. When the heat exchange medium flows into the extension portion 41 and the bending portion 42 in sequence, the internal and external temperature difference between 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 caused by heat exchange with the environment can be compensated, so that the heat exchange effects 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 tend to be consistent, thereby improving the temperature uniformity of the battery device 1000, and thereby improving the service life of the battery device 1000 to a certain extent.

[0132] In some embodiments of the present invention, Figure 5 As shown, the extension portions 41 of the plurality of heat exchange channels 31 constitute four extension segments, which are sequentially arranged along the circumference of the heat exchange assembly 300 , and the four extension segments together cover the bending portions 42 of the plurality of heat exchange channels 31 .

[0133] An extension segment may consist of one extension portion 41, or may be composed of multiple extension portions 41. For example, one extension segment may include two extension portions 41, which may be connected or spaced apart. Furthermore, any of the four extension segments may extend along a straight line, a curve, or a broken line.

[0134] In some examples, the four extensions are connected end to end in the circumferential direction of the heat exchange assembly 300. The bent portion 42 is wrapped around the inner sides of the four extensions, so that the bent portion 42 is completely wrapped around the inner sides of the four extensions. In this case, the four extensions can exchange heat with all peripheral battery cells 210 of the battery cell assembly 200 located near the edge of the housing 100, and the bent portions 42 of the multiple heat exchange channels 31 can exchange heat with the internal battery cells 210 located near the middle of the housing 100.

[0135] When the battery device 1000 is in cooling condition, the heat exchange medium can first enter the bending portion 42 of each heat exchange channel through the inlet 3103 of the multiple heat exchange channels 31 to cool the internal battery cells 210 near the middle of the box body 100, and then enter the four extension sections formed by the multiple heat exchange channels 31 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 100 can dissipate heat directly to the environment through the box 100, the natural heat dissipation of the peripheral battery cells 210 is better than the heat dissipation of the internal battery cells 210. Therefore, the heat exchange medium with a lower temperature in the bent portion 42 can better meet the heat dissipation needs of the battery cells 210 in the middle of the box 100. At the same time, since the peripheral battery cells 210 near the edge of the box 100 can dissipate heat naturally directly to the external environment, when the temperature of the heat exchange medium in the four extended sections is slightly higher, it can still meet the heat dissipation needs of the peripheral battery cells 210, thereby making the temperatures of the peripheral battery cells 210 near the edge of the box 100 and the battery cells 210 near the middle of the box 100 more consistent after cooling and heat dissipation, 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.

[0136] When the battery device 1000 is in a heating state, the heat exchange medium can first enter the four extended sections formed by the multiple heat exchange channels 31 through the inlets 3103 of the multiple heat exchange channels 31, heating the peripheral battery cells 210 near the edge of the housing 100. The heat exchange medium then enters the bent portions 42 of the multiple heat exchange channels 31 to cool the internal battery cells 210 near the center of the housing 100. Because the peripheral battery cells 210 near the edge of the housing 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 in the four extended sections first heats the peripheral battery cells 210 near the edge of the housing 100. This can raise 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 housing 100 due to heat dissipation to the external environment, thereby meeting their heating needs. At the same time, the battery cells 210 near the center of the housing 100 have less contact area with the external environment, resulting in less heat loss. The slightly lower temperature heat exchange medium flowing in the bend 42 can effectively meet the heating needs of the battery cells 210 in combination with the heat generated by the battery cells 210 themselves. As a result, the temperatures of the peripheral battery cells 210 near the edge of the housing 100 and the battery cells 210 near the center of the housing 100 after heating are relatively consistent, reducing the temperature difference between the inside and outside of the battery cells 210 caused by heat dissipation to the environment, and achieving a more uniform temperature distribution within the battery device 1000.

[0137] In the above technical solution, the extension portions 41 of multiple heat exchange channels 31 constitute four extension segments, and the four extension segments are arranged in sequence along the circumference of the heat exchange component 300 and enclose the bending portion 42. As a result, the structure of the heat exchange channel 31 can be further compacted, and the circumferential length of the heat exchange channel 31 in the box body 100 can be extended to fit the heat exchange with the peripheral battery cells 210 close to the edge of the box body 100, thereby improving the thermal management efficiency of the peripheral battery cells 210 and improving the temperature uniformity performance between the peripheral battery cells 210.

[0138] In some embodiments of the present invention, Figure 5 As shown, the four extension segments are a first extension segment 4a, a second extension segment 4b, a third extension segment 4c and a fourth extension segment 4d. The first extension segment 4a and the third extension segment 4c both extend along the first direction X and are arranged at intervals in the second direction Y. The second extension segment 4b and the fourth extension segment 4d both extend along the second direction Y and are arranged at intervals in the first direction X.

[0139] In some examples, the outer contour of the housing 100 is generally rectangular, the number of battery cell assemblies 200 is one or more, and all of the battery cell assemblies 200 constitute a battery assembly of the battery device. The outer contour of the battery assembly is also generally rectangular. In this case, the cross-section of the housing 100 and the battery assembly parallel to the first plane is generally rectangular. The first extension segment 4a and the third extension segment 4c both extend along the first direction X, and are parallel to and spaced apart from each other in the second direction Y. The first extension segment 4a and the third extension segment 4c are respectively arranged at two side edges of the battery assembly in the second direction Y. The second extension segment 4b and the fourth extension segment 4d both extend along the second direction Y, and are parallel to and spaced apart from each other in the first direction X. The second extension segment 4b and the fourth extension segment 4d are respectively arranged at two ends of the battery assembly in the first direction X.

[0140] Furthermore, the first extension segment 4a, the second extension segment 4b, the third extension segment 4c, and the fourth extension segment 4d are connected end to end in the first plane to form a rectangular ring shape. The first extension segment 4a can be composed of two extensions 41 extending along the first direction X and spaced apart in the first direction X. The first extension segment 4a, the second extension segment 4b, the third extension segment 4c, and the fourth extension segment 4d form a rectangular ring shape, with a gap formed between the two extensions 41 of the first extension segment 4a. The second extension segment 4b is composed of two extensions 41 extending along the second direction Y and connected in the second direction Y. The third extension segment 4c is composed of a single extension 41 extending along the first direction X. The fourth extension segment 4d is composed of a single extension 41 extending along the second direction Y.

[0141] In the above technical solution, the first extension section 4a, the second extension section 4b, the third extension section 4c and the fourth extension section 4d can enclose a rectangular frame structure, which can not only improve the integrity of the heat exchange component 300, compact the structure of the heat exchange flow channel, increase the heat exchange area between the heat exchange component 300 and the battery cell assembly 200, and improve the heat exchange efficiency, but also can exchange heat with all the peripheral battery cells 210 through the four extension sections, thereby improving the heat exchange efficiency and temperature uniformity of the peripheral battery cells 210.

[0142] In some embodiments of the present invention, Figure 5 As shown, in the circumferential direction of the heat exchange assembly 300 , two adjacent extension portions 41 are connected or arranged at intervals.

[0143] In some examples, adjacent extension portions 41 in the same heat exchange channel 31 are connected and communicated with each other to enhance the structural integrity of the heat exchange assembly 300 and improve the structural strength of the heat exchange.

[0144] In some examples, two adjacent extension portions 41 of different heat exchange channels 31 may be connected and interconnected to further compact the structure of the multiple heat exchange channels 31 and improve the strength and rigidity of the heat exchange assembly 300 .

[0145] In some examples, two adjacent extension portions 41 of different heat exchange channels 31 are spaced apart from each other. This can reduce interference between adjacent heat exchange channels 31, simplify the structure of the heat exchange channels 31, and facilitate processing.

[0146] In the above technical solution, the two adjacent extension portions 41 are connected, which can enhance the integrity of the heat exchange component 300 and improve the structural strength of the heat exchange component 300. The two adjacent extension portions 41 are arranged at intervals, which can reduce the mutual interference between adjacent heat exchange channels 31 and facilitate the processing and manufacturing of the heat exchange channels 31.

[0147] In some embodiments of the present invention, Figure 5 As shown, each heat exchange channel 31 includes at least two extension portions 41, and the multiple extension portions 41 of the heat exchange channel 31 are connected in sequence, and the extension directions of the two connected extension portions 41 are different, and the bending portion 42 is connected to the downstream side or upstream side of the multiple extension portions 41 in the fluid flow direction.

[0148] That is to say, a heat exchange channel 31 can have two, three, four or five extension parts 41, and the multiple extension parts 41 are connected in sequence. One of the extension parts 41 located at both ends of the extension direction is connected to the bending part 42.

[0149] For example, the first heat exchange channel 31a includes two extension portions 41, which are arranged perpendicular to each other and smoothly connected. The first extension portion 41 is arranged at the front end of the battery device 1000 and extends in the left-right direction. One end of the first extension portion 41 is formed as an inlet 3103 and the other end is connected to the second extension portion 41. The second extension portion 41 is arranged on one side of the battery device 1000 in the left-right direction and extends in the front-back direction. The bending portion 42 is connected to the end of the second extension portion 41 away from the first extension portion 41.

[0150] For another example, the second heat exchange channel 31b includes four extension portions 41, the first extension portion 41 is arranged at the front end of the battery device 1000 and extends in the left-right direction, one end of the first extension portion 41 forms the entrance of the second heat exchange channel 31b, the second extension portion 41 is arranged on the left side of the battery device 1000 and extends in the front-to-back direction, the third extension portion 41 is arranged at the rear end of the battery device 1000 and extends in the left-to-right direction, and is connected to the other end of the first extension portion 41 through the second extension portion 41, the fourth extension portion 41 is arranged on the right side of the battery device 1000 and extends in the front-to-back direction, the rear end of the fourth extension portion 41 is connected to the third extension portion 41, and the front end is connected to the bending portion 42.

[0151] When the heat exchange medium flows in the heat exchange channel 31, under low-temperature heating conditions, the heat exchange medium first flows through the multiple extensions 41 in sequence, and then flows into the bend 42. At this time, the heat exchange medium with a slightly higher temperature can first exchange heat with the peripheral battery cells 210 near the edge of the casing 100 in the multiple extensions 41, and then the heat exchange medium with a slightly lower temperature can exchange heat with the internal battery cells 210 in the bend 42. Because the peripheral battery cells 210 near the edge of the casing 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 in the extension 41 first heats the peripheral battery cells 210 near the edge of the casing 100. This 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 casing 100 due to heat dissipation to the external environment, thereby meeting their heating needs. At the same time, the battery cells 210 near the center of the housing 100 have less contact area with the external environment, resulting in less heat loss. The slightly lower temperature heat exchange medium flowing in the bend 42 can effectively meet the heating needs of the battery cells 210 in combination with the heat generated by the battery cells 210 themselves. As a result, the temperatures of the peripheral battery cells 210 near the edge of the housing 100 and the battery cells 210 near the center of the housing 100 are relatively consistent after heating, reducing the temperature difference between the inside and outside of the battery cells 210 caused by heat dissipation to the environment, and achieving a more uniform temperature distribution within the battery device 1000.

[0152] Under high-temperature cooling conditions, the heat exchange medium can first flow into the bending portion 42, and then flow into multiple extension portions 41 in sequence. At this time, the heat exchange medium with a slightly lower temperature can first exchange heat with the internal battery cells 210 in the bending portion 42, and then the heat exchange medium with a slightly higher temperature can enter the multiple extension portions 41 to exchange heat with 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 100 can dissipate heat directly to the environment through the box 100, the natural heat dissipation of the peripheral battery cells 210 is better than the heat dissipation of the internal battery cells 210. Therefore, the heat exchange medium with a lower temperature in the bending portion 42 can better meet the heat dissipation needs of the battery cells 210 in the middle of the box 100. At the same time, since the peripheral battery cells 210 near the edge of the box 100 can dissipate heat naturally directly to the external environment, when the temperature of the heat exchange medium in the extension portion 41 is slightly higher, it can still meet the heat dissipation needs of the peripheral battery cells 210, thereby making the temperatures of the peripheral battery cells 210 near the edge of the box 100 and the battery cells 210 near the middle of the box 100 more consistent after cooling and heat dissipation, 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.

[0153] In the above technical solution, the multiple extensions 41 of each heat exchange channel 31 are connected in sequence, and the bending portion 42 is connected to the downstream side or upstream side of the multiple extensions 41 in the fluid flow direction. This not only facilitates the multiple extensions 41 of the multiple heat exchange channels 31 to cooperate with and surround the bending portion 42, but also reduces the internal and external temperature difference between the battery cells 210 caused by heat dissipation to the environment, and improves the temperature uniformity between the peripheral battery cells 210 near the edge of the box body 100 and the internal battery cells 210.

[0154] In some embodiments of the present invention, Figure 5 As shown, the flow channel main body 311 includes two extension portions 41 and a bending portion 42, the two extension portions 41 are respectively a first extension portion 41 and a second extension portion 41, the first extension portion 41 extends along the second direction Y, and the second extension portion 41 extends along the first direction X, the first extension portion 41, the second extension portion 41 and the bending portion 42 are connected in sequence, and the bending portion 42 is arranged on the side of the two extension portions 41 away from the edge of the box body 100.

[0155] In some examples, the first extension portion 41 and the second extension portion 41 can be connected in an L shape, and the connection position between the first extension portion 41 and the second extension portion 41 is bent into a quarter arc shape, and the bent portion 42 extends back and forth in the second direction Y, one end of the bent portion 42 is connected to the end of the second extension portion 41 facing away from the first extension portion 41, and the other end extends toward the first extension portion 41.

[0156] One end of the bent portion 42 connected to the second extending portion 41 defines a U-shaped area with the first extending portion 41 and the second extending portion 41 , and the rest of the bent portion 42 is arranged in the U-shaped area.

[0157] The bending portion 42 bends and extends and is arranged on the inner side of the two extension portions 41. The bending portion 42 can increase the extension length of the flow channel body 311, increase the heat exchange time and heat exchange area between the heat exchange medium and the battery cell 210 in the bending portion 42, and improve the heat exchange effect.

[0158] The second extension portion 41 is connected to the bent portion 42 by bending. For example, the connection between the second extension portion 41 and the bent portion 42 can be bent into an arc and / or a broken line. This can compact the structure of the flow channel body 311 and increase the arrangement density of the flow channels of the flow channel body 311.

[0159] The bending portion 42 is connected to the upstream or downstream side of the two extension portions 41 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 flow into the first extension portion, the second extension portion and the bending portion 42 in sequence, or the heat exchange medium can flow into the bending portion, the second extension portion and the first extension portion in sequence.

[0160] When the heat exchange component 300 dissipates heat and cools the battery cell 210, the heat exchange medium in the flow channel main body 311 can flow from the bending portion 42 to the two extension portions 41. At this time, the heat exchange medium with a lower temperature first cools the battery cell 210 in the middle position of the heat exchange area corresponding to the flow channel main body 311 in the bending portion 42, and then cools the battery cell 210 in the peripheral position of the heat exchange area corresponding to the flow channel main body 311 in the two extension portions 41. Since the battery cells 210 at the peripheral positions of the heat exchange area are arranged closer to the edge of the box body 100 than the battery cells 210 at the middle position of the heat exchange area, they naturally dissipate more heat with the external environment of the box body 100. The lower temperature of the heat exchange medium in the bending portion 42 can better meet the heat dissipation requirements 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 two extension portions 41 is slightly higher, but it can still meet the heat dissipation requirements of the battery cells 210 at the peripheral positions of the heat exchange area corresponding to the flow channel main body 311. Therefore, 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.

[0161] When the heat exchange component 300 heats the battery cell 210, the heat exchange medium in the flow channel main body 311 can flow from the two extension parts 41 into the bending part 42. At this time, the heat exchange medium with a higher temperature first flows into the two extension parts 41 to heat the battery cell 210 at the peripheral position of the heat exchange area corresponding to the flow channel main body 311, and then the heat exchange medium with a slightly lower temperature flows into the bending part 42 to heat the battery cell 210 at the middle position of the heat exchange area corresponding to the flow channel main 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 two extension parts 41 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, 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, and the heat exchange medium with a slightly lower temperature in the bending portion 42 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.

[0162] In the above technical solution, since the two extension parts 41 of the flow channel main body 311 are connected by bending, and the bending part 42 is bent and arranged on the inner side of the two extension parts 41, 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.

[0163] In some embodiments of the present invention, Figure 5 As shown, the bending portion 42 includes multiple 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 multiple transverse portions 3101 of the bending portion 42 are bent and connected in sequence along the first direction X.

[0164] The bending portion 42 may include two, three, four, five or more transverse portions 3101 .

[0165] 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.

[0166] In the above technical solution, the bending portion 42 includes multiple transverse portions 3101. The multiple transverse portions 3101 can increase the heat exchange area of ​​the bending portion 42, improve the heat exchange efficiency, evenly distribute the heat of the bending portion 42, and improve the temperature uniformity between the battery cells 210. In addition, the multiple transverse portions 3101 are bent and connected in sequence, which can simplify the structure of the bending portion 42 and facilitate the processing and forming of the bending portion 42.

[0167] In some embodiments of the present invention, Figure 5 As shown, the connection position of two adjacent horizontal portions 3101 of the bending portion 42 is bent into a semicircular arc shape.

[0168] For example, the bent portion 42 includes multiple transverse portions 3101, which extend along the second direction Y and are arranged parallel and spaced apart in the first direction X. The spacing between two adjacent transverse portions 3101 can be set according to the heat exchange requirements of the battery cells 210. The multiple transverse portions 3101 are bent in sequence and connected, and the bends are semicircular arcs that protrude away from the transverse portions 3101 in the second direction Y.

[0169] 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.

[0170] In the above technical solution, the connection position of the two transverse parts 3101 of the bending part 42 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 bending part 42, 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 bending part 42, and can also reduce the stress concentration at the bending position, thereby improving the service life of the heat exchange component 300.

[0171] In some embodiments of the present invention, Figure 5 As shown, the connection position between the first extension portion 41 and the second extension portion 41 is bent into a quarter arc shape, and the connection position between the second extension portion 41 and the bent portion 42 is bent into a quarter arc shape.

[0172] In the above technical solution, the connection between the first extension portion 41 and the second extension portion 41, and the connection between the second extension portion 41 and the bent portion 42, are both bent into a quarter-circular arc shape. This allows for a smooth transition at the connection, reduces turbulence and eddies, reduces flow resistance, lowers pressure drop, and improves heat exchange efficiency. It also reduces stress concentration at the connection, improves the structural stability and durability of the connection, and extends the service life of the heat exchange assembly 300. Furthermore, it facilitates the processing and molding of the flow channel body 311, reducing the risk of leakage at the connection.

[0173] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, the inlets 3103 and outlets 3104 of the plurality of heat exchange channels 31 are all located at the same end of the battery device 1000 in the first direction X.

[0174] For example, the first direction X is the front-to-back direction of the battery device 1000 , and the inlets 3103 and outlets 3104 of the plurality of heat exchange channels 31 may be arranged at the front end or the rear end of the battery device 1000 .

[0175] Since the inlets 3103 and outlets 3104 of the multiple heat exchange channels 31 are all 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. This is not only conducive to the centralized input of heat exchange medium to the multiple heat exchange channels 31, but also can make the temperature and flow rate of the heat exchange medium entering the inlet 3103 of each heat exchange channel 31 tend to be consistent, so that the heat exchange capacity of the multiple heat exchange channels 31 is more balanced, and the temperature uniformity between the battery cells 210 corresponding to the heat exchange of each heat exchange channel 31 is improved.

[0176] Furthermore, since each heat exchange channel 31 is formed with a channel body 311, the multiple channel bodies 311 of the multiple heat exchange channels 31 are arranged along the length of the housing 100, and the inlets 3103 and outlets 3104 of the multiple heat exchange channels 31 are all located at one end of the length of the housing 100. Therefore, the channel bodies 311 spaced apart from the inlets 3103 and outlets 3104 in the length of the housing 100 all need to be connected to the inlets 3103 and outlets 3104 via channel sections (such as the first and second connecting sections described below). In this way, the channel sections connected between the channel bodies 311 and the inlets 3103 and outlets 3104 can increase the extended length of the heat exchange channel 31, extend the flow path of the heat exchange medium, and improve heat exchange efficiency.

[0177] 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.

[0178] 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.

[0179] In the above technical solution, the inlets 3103 and outlets 3104 of the multiple heat exchange channels 31 are all located at the same end of the battery device 1000 in the first direction X, so that the inlets 3103 and outlets 3104 of the multiple heat exchange channels 31 can be centrally arranged, thereby facilitating the centralized connection of the multiple heat exchange channels 31 to external pipelines, simplifying the structure and layout of the external pipelines, reducing the difficulty of installation and maintenance, and also reducing the layout space of the inlets 3103, outlets 3104, and external pipes, resulting in a compact structure, reduced space occupancy, and improved space utilization. It can also improve the temperature uniformity between the battery cells 210 corresponding to the heat exchange channels 31, improve the temperature uniformity between the battery cells 210 at the edge of the housing 100 and the battery cells 210 near the central area of ​​the housing 100, reduce the probability of localized over-temperature or over-temperature in the battery device 1000, and improve the temperature uniformity of the battery device 1000.

[0180] In some embodiments of the present invention, Figure 5 and Figure 6As shown, 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, 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. 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.

[0185] 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 311 of the multiple second heat exchange channels 31b are arranged in sequence along the first direction X.

[0186] 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.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] In some specific examples, the first connection portion 312 includes two extension portions 41, which are connected in an L-shape, one of the two extension portions 41 extends along the first direction X and the other extends along the second direction Y, one end of the extension portion 41 extending along the first direction X is connected to one end of the channel body 311 of the second heat exchange channel 31b, and one end of the extension portion 41 extending along the second direction Y forms an inlet 3103 of the second heat exchange channel 31b.

[0191] In some specific examples, the second connecting portion 313 includes a horizontal portion 3101 and a vertical portion, one end of the vertical portion of the second connecting portion 313 is connected to the other end of the flow channel main body 311 of the second heat exchange flow channel 31b, the other end of the vertical portion of the second connecting portion 313 extends along a straight line in the first direction X towards the inlet 3103 and the outlet 3104, the horizontal portion 3101 of the second connecting portion 313 extends along the second direction Y, and one end of the horizontal portion 3101 of the second connecting portion 313 is connected to the other end of the vertical portion of the second connecting portion 313, and the other end of the horizontal portion 3101 of the second connecting portion 313 is formed as the outlet 3104 of the second heat exchange flow channel 31b. Further, the horizontal portion 3101 of the second connecting portion 313 is arranged perpendicular to the vertical portion, and the connection position of the horizontal portion 3101 and the vertical portion of the second connecting portion 313 is bent into a quarter circular arc shape.

[0192] In some specific examples, the first connecting portion 312 and the second connecting portion 313 can be located on the same side of the first heat exchange flow channel 31a in the second direction Y, and the first connecting portion 312 and the second connecting portion 313 can be located on both sides of the second heat exchange flow channel 31b in the second direction Y, respectively.

[0193] When the heat exchange medium flows into the second heat exchange flow channel 31b, the heat exchange medium first enters the first connecting portion 312 from the inlet 3103, flows into the flow channel main body 311 through the first connecting portion 312, and then flows into the second connecting portion 313, and finally flows out from the outlet 3104, wherein the heat exchange medium flowing through the first connecting portion 312, the flow channel main body 311 and the second connecting portion 313 exchanges heat with the battery monomer 210, so as to make the battery monomer 210 work in an appropriate temperature range.

[0194] In some specific examples, the inlet 3103 and the outlet 3104 are located at one end of the box body 100 in the first direction X, and the flow channel main body 311 of the second heat exchange flow channel 31b is located on the side of the flow channel main body 311 of the first heat exchange flow channel 31a away from the inlet 3103 and the outlet 3104, at this time, in order to realize the connection of the inlet 3103 and the outlet 3104 with the flow channel main body 311 of the second heat exchange flow channel 31b, the first connecting portion 312 and the second connecting portion 313 need to be arranged on one side or both sides of the flow channel main body 311 of the first heat exchange flow channel 31a in the second direction Y, that is, the first connecting portion 312 and the second connecting portion 313 are arranged closer to the edge of the box body 100 than the flow channel main body 311 of the first heat exchange flow channel 31a and the flow channel main body 311 of the second heat exchange flow channel 31b.

[0195] 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.

[0196] 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 313, since the second connection part 313 is arranged closer to the edge of the box body 100 than the channel body 311 of the first heat exchange channel 31a, 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 of the 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 channel body 311 of the first heat exchange channel 31a and the battery cell 210 corresponding to the channel body 311 of the second heat exchange channel 31b) can be reduced, thereby improving the temperature uniformity between the battery cells 210.

[0197] 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.

[0198] 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.

[0199] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, 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 .

[0200] 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 .

[0201] 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.

[0202] 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, 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 side edge of the box body 100 is smaller than the distance between the second connection portion 313 and the left side edge of the box body 100.

[0203] Because the first connection portion 312 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 connection portion 313. 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 connection portion 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.

[0204] 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.

[0205] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, 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.

[0206] 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.

[0207] 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.

[0208] In some embodiments of the present invention, Figure 5 As shown, 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.

[0209] 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.

[0210] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, the first connection portion 312 is in contact with the outermost battery cell 210 arranged in the second direction Y in the battery cell assembly 200 for heat exchange.

[0211] Multiple battery cells 210 are stacked along the second direction Y to form a row of battery cells 210. The second direction Y is the thickness direction of the battery cells 210. Multiple rows of battery cells 210 are arranged along the first direction X to form the battery cell assembly 200. The first connecting portion 312 and the second connecting portion 313 both extend in a straight line in the first direction X. The first connecting portion 312 and the second connecting portion 313 are arranged parallel to and spaced apart from each other in the second direction Y. The outermost one or more battery cells 210 of the first connecting portion 312 in the second direction Y are in contact with each other for heat exchange.

[0212] When the width of the first connection portion 312 in the second direction Y is greater than the thickness of the battery cell 210, the first connection portion 312 can be in contact with at least two outermost layers of the battery cell 210 in the second direction Y for heat exchange; when the width of the first connection portion 312 in the second direction Y is less than or equal to the thickness of the battery cell 210, the first connection portion 312 can be in contact with one or two outermost layers of the battery cell 210 in the second direction Y for heat exchange.

[0213] In some examples, the length of the first connection portion 312 in the second direction Y is greater than or equal to the total length of the plurality of battery cell assemblies 200 in the first direction X. Thus, each of the outermost battery cells 210 of the plurality of battery cell assemblies 200 in the second direction Y can exchange heat with the first connection portion 312 , thereby improving temperature uniformity.

[0214] In the above technical solution, the first connecting portion 312 is in contact with the outermost battery cell 210 in the second direction Y for heat exchange, which can increase the contact area between the outermost battery cell 210 in the second direction Y and the heat exchange channel 31, thereby improving the heat exchange efficiency of the outermost battery cell 210 in the second direction Y, balancing the internal and external temperature differences between the battery cells 210 caused by the ambient temperature, and thereby improving the temperature uniformity between the battery cells 210.

[0215] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, the distance between the first connection portion 312 and the second connection portion 313 in the second direction Y is smaller than the thickness of the battery cell 210 in the second direction Y.

[0216] In the above technical solution, since the distance between the first connection part 312 and the second connection part 313 in the second direction Y is smaller than the thickness of the battery cell 210 in the second direction Y, the first connection part 312 can exchange heat with the outermost battery cell 210 in the second direction Y, and the second connection part 313 can exchange heat with the battery cell 210 adjacent to the first connection part 312, so that each battery cell 210 can be in contact with the heat exchange channel 31 for heat exchange, avoiding the situation where the battery cell 210 between the first connection part 312 and the second connection part 313 can neither exchange heat with the first connection part 312 nor with the second connection part 313, thereby improving the temperature uniformity between the battery cells 210.

[0217] In some embodiments of the present invention, Figure 5 As shown, 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.

[0218] 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 .

[0219] 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.

[0220] In the above technical solution, the ratio of the extension lengths of any two heat exchange channels 31 is set to 0.8-1.2, so that the extension lengths of any two heat exchange channels 31 can be closer, so that the flow distance of the heat exchange medium in each heat exchange channel 31 is more uniform, and the flow resistance in each heat exchange channel 31 is close, so that the heat exchange efficiency of each heat exchange channel 31 is uniform, thereby improving the temperature uniformity between the battery cells 210 corresponding to each heat exchange channel 31.

[0221] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, 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.

[0222] For example, the first direction X is the front-to-back direction of the battery device 1000, 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.

[0223] Furthermore, 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. In other words, 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.

[0224] 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 may be 1.02, 1.04, 1.06, 1.08, 1.0, 1.12, 1.14, 1.16, 1.18 or 2.0.

[0225] It should be noted that because both the first heat exchange channel 31a and the second heat exchange channel 31b bend and extend, and the channel body 311 of the first heat exchange channel 31a is arranged in front of the channel body 311 of the second heat exchange channel 31b, and because the inlet 3103 and 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 housing 100, when the first heat exchange channel 31a and the second heat exchange channel 31b extend to the same length, the total length of the straight section of the second heat exchange channel 31b will be greater than the total length of the straight section of the first heat exchange channel 31a, and the number of bends in the first heat exchange channel 31a is greater than that in the second heat exchange channel 31b. The longer the extended length, the greater the pressure drop and flow resistance, and the greater the number of bends, the greater the pressure drop and flow resistance.

[0226] 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, thereby improving the temperature uniformity between the battery cell 210 corresponding to the first heat exchange channel 31a and the battery cell 210 corresponding to the second heat exchange channel 31b.

[0227] 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, thereby improving the temperature uniformity between the battery cells 210.

[0228] In some embodiments of the present invention, Figure 6 and Figure 7 As shown, the battery cell assembly 200 includes multiple columns of battery cells 210, and the multiple battery cells 210 are stacked in a row along the second direction Y. The multiple columns of battery cells 210 are arranged into a battery cell assembly 200 along the first direction X. 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, and the first direction X, the second direction Y and the third direction Z are arranged at an angle to each other.

[0229] For example Figure 7 As shown, the battery device 1000 includes a plurality of battery cell assemblies 200, each of which may include one or more rows of battery cells 210. The battery device 1000 in the embodiment of the present invention includes three battery cell assemblies 200, which 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 plurality of 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.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] Since the thickness dimension of the battery cell 210 is much smaller than the length dimension of the battery cell 210, when the outer contour of the box body 100 and the width dimension of the box body 100 are determined, the arrangement scheme of the battery cell assembly 200 of the present invention is adopted, that is, the thickness direction of the battery cell 210 is parallel to the width direction of the box body 100, so that the battery cells 210 are stacked in the width direction of the box body 100, which can more flexibly adapt to the width dimension of the box body 100, fully utilize the space in the width direction of the box body 100, and improve the energy density of the battery device 1000.

[0234] Furthermore, the heat exchange assembly 300 is arranged on one side of the battery cell assembly 200 in the third direction Z, or the heat exchange assembly 300 is arranged on both sides of the battery cell assembly 200 in the third direction Z. For example, if the third direction Z is the up-down direction, the heat exchange assembly 300 can be arranged on the upper or lower side of the battery cell assembly 200, or on both the upper and lower sides of the battery cell assembly 200. Through heat exchange between the heat exchange assembly 300 and the multiple battery cells 210 of the battery cell assembly 200, the multiple battery cells 210 can be operated within a suitable temperature range, thereby improving the reliability, stability, and service life of the battery device 1000.

[0235] The heat exchange assembly 300 has multiple heat exchange channels 31. For example, the heat exchange assembly 300 includes multiple heat exchange tubes 30. Each heat exchange tube 30 bends and extends to define a heat exchange channel 31 on its inner side. Each heat exchange channel 31 has a channel body 311. The channel bodies 311 of the multiple heat exchange channels 31 are arranged sequentially along the first direction X.

[0236] Because the multiple columns of battery cells 210 in the battery cell assembly 200 are arranged sequentially along the first direction, the multiple battery cell assemblies 200 are arranged sequentially along the first direction, and the multiple flow channel bodies 311 are arranged sequentially along the first direction, each flow channel body 311 can be in close contact with one corresponding battery cell assembly 200 or multiple adjacent battery cell assemblies 200 for heat exchange, or each flow channel body 311 can be in close contact with one corresponding column or multiple adjacent columns of battery cells 210 for heat exchange. For example, the flow channel body 311 of the first heat exchange flow channel 31a exchanges heat with two battery cell assemblies 200, and the flow channel body 311 of the second heat exchange flow channel 31b exchanges heat with one battery cell assembly 200. This can improve temperature uniformity between the battery cell assemblies 200.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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 .

[0243] 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.

[0244] 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.

[0245] 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.

[0246] In some embodiments of the present invention, Figure 6 and Figure 7 As shown, 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 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.

[0247] The heat exchange tube 30 is a tubular element for achieving heat exchange. The heat exchange medium can flow inside the heat exchange tube 30 and transfer the heat of the heat exchange medium to the object that needs to be heated or cooled (such as the battery cell 210) through the tube wall of the heat exchange tube 30.

[0248] In some examples, each heat exchange tube 30 is formed by bending a single tube, thereby reducing the number of welding points of the heat exchange tube 30 and reducing the risk of leakage of the heat exchange assembly 300. At the same time, the operation process of bending a single tube is simpler than the manufacturing process of a plate structure, and the heat exchange tube requires less material than the cold plate, which can significantly reduce the cost of the heat exchange assembly 300.

[0249] Compared with the related art in which a cold plate is set up and a flow channel is formed on the cold plate, the flow channel in the cold plate is narrow, the flow rate is limited and the flow rate is uneven, the utility model adopts a heat exchange tube 30 that is bent and extended to define a heat exchange flow channel 31, the heat exchange medium in the heat exchange tube 30 can achieve a higher flow rate, and the turbulence of the heat exchange medium is increased, thereby improving the heat exchange efficiency of the battery cell 210. At the same time, the flow rate of the heat exchange medium in the heat exchange tube 30 is relatively uniform, which is conducive to achieving uniform transfer of the heat exchange medium temperature, thereby improving the temperature uniformity between the battery cells 210.

[0250] In addition, the bent and extended heat exchange tube 30 of the present invention can set the bending position and arrangement density of the heat exchange tube 30 according to the heat exchange requirements of the battery cells 210 at various positions in the battery device 1000, thereby effectively reducing the probability of local overtemperature and undertemperature in the battery device 1000 and improving the temperature uniformity between the battery cells 210.

[0251] In some examples, the heat exchange tube 30 may have various shapes, for example, a round tube, a flat tube, etc.

[0252] In some examples, the number of heat exchange tubes 30 may be two, three, four or more, and the number of heat exchange tubes 30 may be designed according to the number and size of the battery cells 210 .

[0253] Furthermore, the plurality of heat exchange tubes 30 are arranged in parallel. For example, the inlets 3103 of the plurality of heat exchange tubes 30 are all connected to the diversion cavity of the collector of the heat exchange assembly 300, and the outlets 3104 of the plurality of heat exchange tubes 30 are all connected to the confluence cavity of the collector.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] In the above technical solution, since the heat exchange contact area between the heat exchange tube 30 and the battery cell 210 is greater than or equal to one-third of the area of ​​the first wall, the heat exchange contact area between the heat exchange tube 30 and each battery cell 210 can be increased when the heat exchange tube 30 cools or heats the battery cell 210, thereby improving the heat exchange rate for the battery cell 210. In this way, not only can the battery cell 210 quickly reach a preset temperature range when the battery device 1000 starts operating, but the battery cell 210 can also be maintained within an appropriate temperature range during normal operation of the battery device 1000, reducing temperature fluctuations of the battery cell 210 during operation, thereby making the operation of the battery cell 210 more stable and enabling the battery device 1000 to maintain good performance.

[0258] In some embodiments of the present invention, a separation rib (not shown) is provided in the heat exchange tube 30 , which extends along the extension direction of the heat exchange tube 30 and divides the heat exchange channel 31 into multiple sub-channels arranged in parallel.

[0259] For example, the heat exchange tube 30 may be a flat tube or a harmonica tube. Separator ribs may be provided within each flat tube or harmonica tube. These ribs may extend along the length of the flat tube or harmonica tube. Each heat exchange tube 30 may be provided with one or more separator ribs spaced along the width of the heat exchange tube 30. One or more separator ribs may separate the heat exchange channel 31 within the flat tube or harmonica tube into multiple sub-channels. This increases the contact area between the heat exchange medium and the tube wall of the heat exchange tube 30, improving heat exchange efficiency.

[0260] 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.

[0261] 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.

[0262] In some embodiments of the present invention, Figure 7As shown, 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 an accommodating cavity. The battery cell 210 is arranged in the accommodating cavity.

[0263] In some examples, the base plate 110 and the upper cover 120 are detachably connected. For example, a plurality of first fixing holes arranged at intervals are formed on the periphery of the base plate 110, and a plurality of second fixing holes arranged at intervals are formed on the periphery of the upper cover 120. The base plate 110 and the upper cover 120 are fixedly connected by fasteners passing through the first fixing holes and the second fixing holes.

[0264] In some examples, a first flange extending horizontally is provided on the periphery of the base plate 110, and a first fixing hole passes through the first flange in the vertical direction; a second flange is formed on the periphery of the upper cover 120, and a second fixing hole passes through the second flange in the vertical direction.

[0265] In some examples, a seal 140 is provided between the bottom plate 110 and the upper cover 120. The seal 140 extends along the circumference of the bottom plate 110 and the upper cover 120 and seals between the first flange of the bottom plate 110 and the second flange of the upper cover 120. The seal 140 is used to seal the gap between the bottom plate 110 and the upper cover 120. The seal 140 can be a sealing gasket, which can extend in an annular shape along the circumference of the bottom plate 110 and the upper cover 120. The seal 140 can also include multiple sealing segments, which are arranged sequentially or spaced apart along the circumference of the bottom plate 110 and the upper cover 120.

[0266] 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.

[0267] 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.

[0268] In some embodiments of the present invention, Figure 7 As shown, the box body 100 also includes: a mounting beam 130, which is arranged in the accommodating cavity, extending along the first direction X and 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.

[0269] 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.

[0270] 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 .

[0271] 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.

[0272] 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.

[0273] In some embodiments of the present invention, Figure 7 As shown, the heat exchange assembly 300 is disposed in the box body 100 .

[0274] 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.

[0275] 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.

[0276] In some embodiments of the present invention, Figure 5 and Figure 7 As shown, 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.

[0277] For example, the number of the ribs 111 on the bottom plate 110 may be four, eight, ten, twelve, fifteen or more.

[0278] 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.

[0279] like Figure 7As 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.

[0280] 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.

[0281] 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.

[0282] In some embodiments of the present invention, the ratio of the length of the box 100 in the first direction X to the width of the box 100 in the second direction Y is greater than 2. 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 has a long box shape with a length much greater than its width.

[0283] In the above technical solution, the ratio of the length to the width of the box body 100 is greater than 2, which can make the battery device 1000 have a narrower width, reduce the space occupied in the width direction, and facilitate the assembly of the battery device 1000.

[0284] In some embodiments of the present invention, the ratio of the height of the box body 100 in the third direction Z to the width 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.

[0285] 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.

[0286] 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.

[0287] 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, and the third direction Z intersects with the first direction X.

[0288] 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.

[0289] 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.

[0290] 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.

[0291] In the above technical solution, since the electric device 1 is provided with the above-mentioned battery device 1000, and the multiple heat exchange channels 31 of the heat exchange assembly 300 are formed with a channel body 311, the channel bodies 311 of at least two heat exchange channels 31 are arranged along the length direction of the battery device 1000. In this way, different channel bodies 311 can exchange heat with different areas of the battery device 1000 in the length direction, thereby reducing the temperature difference between the battery cells 210 at different positions in the length direction of the battery device 1000 and improving the temperature of the battery device 1000 in the length direction. Uniformity. At the same time, since the heat exchange channel 31 includes an extension portion 41 and a bending portion 42, and the extension portion 41 is wrapped around the outside of the bending portion 42, the extension portion 41 can prevent other debris or impurities from entering the inner side of the extension portion 41, and can also exchange heat with the battery cell 210 closer to the edge of the box body 100, thereby improving the thermal management efficiency of the battery cell 210 at the edge of the box body 100, and can also compact the structure of the heat exchange channel 31, increase the length of the heat exchange channel 31, and improve the heat exchange efficiency of the battery cell assembly 200, thereby improving the overall performance of the electrical device 1.

[0292] 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.

[0293] 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.

[0294] However, when the width of the battery cells 210 does not match the width inside the box 100 of the battery device 1000, resulting in the stacking direction of the battery cells 210 of the battery module being along the left-right direction of the vehicle, the water-cooling pipe is divided into two left and right parts, and the following problem will arise: since the water-cooling pipe needs to have a certain bending radius when bending, there is at least a distance of the width of the flow channel between the flow channels, and the battery cells 210 located between the flow channels arranged adjacent to each other in the left-right direction cannot be directly bonded to the flow channel for cooling or heating, which can easily cause the temperature of the battery cells 210 in this part to be too high or too low, resulting in a large temperature difference between the battery cells 210, which is not conducive to the temperature difference management between the battery cells 210.

[0295] In the present invention, the length direction of the housing 100 of the battery device 1000 is a first direction X, which is the front-to-back direction of the vehicle. The battery cell assembly 200 in the housing 100 includes multiple columns of battery cells 210, which are arranged in the front-to-back direction. Each column of battery cells 210 is stacked along the left-to-right direction of the vehicle (the thickness direction of the battery cells 210 is parallel to the left-to-right direction).

[0296] The heat exchange assembly 300 includes multiple heat exchange channels 31, and the channel bodies 311 of the multiple heat exchange channels 31 are arranged in a front-to-back manner. Specifically, the inlets 3103 and outlets 3104 of the multiple heat exchange channels 31 are located at the front end of the battery device 1000. Each heat exchange channel 31 has a channel body 311, and the multiple channel bodies 311 are arranged in sequence in the front-to-back direction. Each heat exchange channel 31 extends backward from the front end of the battery device 1000 along the left and right sides, and then extends to the corresponding channel body 311 arrangement area. In the channel body 311 arrangement area, the channel body 311 extends in a circuitous manner along the left and right directions to exchange heat with each battery cell 210, and then gradually extends to the front end of the battery device 1000.

[0297] 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 on the vehicle and the assembly of the battery device.

[0298] The following will refer to Figure 1-Figure 7 A vehicle according to a specific embodiment of the present invention is described.

[0299] Reference Figure 1 The vehicle includes a battery device 1000, which is used to provide electrical energy for the vehicle.

[0300] Specifically, if Figures 1-4 As 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.

[0301] 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.

[0302] 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.

[0303] 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.

[0304] like Figure 4-Figure 6 As shown, the heat exchange assembly 300 is arranged between the base plate 110 and the battery cell assembly 200. The heat exchange assembly 300 includes a plurality of heat exchange tubes 30. Each heat exchange tube 30 is bent and extended and arranged in the accommodating groove 112. 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 portion of each heat exchange channel 31 is formed as a channel body 311. The channel bodies 311 of the plurality of heat exchange tubes 30 are arranged in sequence along the front-to-back direction. The inlet 3103 and the outlet 3104 of each heat exchange channel 31 are both arranged on the front side of the battery device 1000.

[0305] Each heat exchange channel 31 includes an extension portion 41 and a bend portion 42. Each heat exchange channel 31 has multiple extension portions 41, which are connected in a series of bends. Adjacent extension portions 41 of the same heat exchange channel 31 are arranged perpendicular to each other. The extension portions 41 of the multiple heat exchange channels 31 form four extension segments: a first extension segment 4a, a second extension segment 4b, a third extension segment 4c, and a fourth extension segment, which are connected end to end. The first and third extension segments 4a and 4c extend in the first direction X and are arranged parallel and spaced in the second direction Y. The second and fourth extension segments 4b and 4d extend in the second direction Y and are arranged parallel and spaced in the first direction X. The bend portions 42 of the multiple heat exchange channels 31 are arranged within the rectangular area enclosed by the first, second, third, and fourth extension segments 4a, 4b, 4c, and 4d. The bend portion 42 includes multiple transverse portions 3101 extending left and right, spaced in the front and back directions, and connected in a series of bends.

[0306] In some specific examples, there are two heat exchange tubes 30, wherein the inner side of one heat exchange tube 30 defines a first heat exchange channel 31a, and the inner side of the other heat exchange tube 30 defines a second heat exchange channel 31b. The first heat exchange channel 31a includes two extensions 41 and a bend 42, which together constitute the channel body 311 of the first heat exchange channel 31a and are arranged in front of the channel body 311 of the second heat exchange channel 31b.

[0307] The second heat exchange channel 31b includes a first connection part 312, a channel body 311 and a second connection part 313 connected in sequence. The first connection part 312 and the second connection part 313 both extend in the front-to-back direction and are arranged at intervals in the left-to-right direction. The first connection part 312 and the second connection part 313 are both arranged on one side of the first heat exchange channel 31a in the second direction Y.

[0308] The first heat exchange channel 31a and the second heat exchange channel 31b extend from their corresponding inlet 3103 to the outlet 3104, respectively, and 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. The width of the heat exchange channel 31 is a first width, the dimension of the battery cell 210 in the front-to-back direction is a second width, and the ratio of the first width to the second width is greater than or equal to one-third. The bottom surface of the battery cell 210 is a first wall surface that cooperates with the heat exchange tube 30. The orthographic projection area of ​​the heat exchange tube 30 on the first wall surface is greater than one-third of the area of ​​the first wall surface. This can increase the temperature rise or cooling rate of the battery cell 210.

[0309] 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.

[0310] 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.

[0311] 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.

[0312] 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 arranged in the box (100), the battery cell assembly (200) comprising a plurality of battery cells (210); A heat exchange component (300) includes a plurality of heat exchange channels (31), at least a portion of each of the heat exchange channels (31) is formed as a channel body (311), the channel bodies (311) of at least two of the heat exchange channels (31) are arranged along a first direction (X), each of the heat exchange channels (31) includes an extension portion (41) and a bending portion (42), at least a portion of the extension portions (41) of the plurality of heat exchange channels (31) extends along the first direction (X), and the bending portion (42) The portion (42) is bent and extended back and forth in a second direction (Y), and the extension portion (41) is arranged outside the bent portion (42) in a first plane; wherein the first direction (X) and the second direction (Y) are both located in the first plane, and the heat exchange component (300) is arranged on at least one side of the battery cell component (200) in a third direction (Z) for heat exchange with the battery cell (210), and the first direction (X), the second direction (Y) and the third direction (Z) intersect with each other.

2. The battery device (1000) according to claim 1, characterized in that The extension portions (41) of the plurality of heat exchange channels (31) constitute four extension sections, and the four extension sections are arranged in sequence along the circumference of the heat exchange component (300), and the four extension sections jointly cover the bending portions (42) of the plurality of heat exchange channels (31).

3. The battery device (1000) according to claim 2, characterized in that The four extension segments are respectively a first extension segment (4a), a second extension segment (4b), a third extension segment (4c) and a fourth extension segment (4d); the first extension segment (4a) and the third extension segment (4c) both extend along the first direction (X) and are arranged at intervals in the second direction (Y); the second extension segment (4b) and the fourth extension segment (4d) both extend along the second direction (Y) and are arranged at intervals in the first direction (X).

4. The battery device (1000) according to claim 1, characterized in that In the circumferential direction of the heat exchange component (300), two adjacent extension portions (41) are connected or arranged at intervals.

5. The battery device (1000) according to claim 1, characterized in that Each of the heat exchange channels (31) includes at least two extension portions (41), and the multiple extension portions (41) of the heat exchange channel (31) are connected in sequence, and the extension directions of the two connected extension portions (41) are different, and the bending portion (42) is connected to the downstream side or upstream side of the multiple extension portions (41) in the fluid flow direction.

6. The battery device (1000) according to claim 1, characterized in that The flow channel body (311) includes two extension portions (41) and one bending portion (42), the two extension portions (41) are respectively a first extension portion (41) and a second extension portion (41), the first extension portion (41) extends along the second direction (Y), and the second extension portion (41) extends along the first direction (X), the first extension portion (41), the second extension portion (41) and the bending portion (42) are connected in sequence, and the bending portion (42) is arranged on a side of the two extension portions (41) that is away from the edge of the box body (100).

7. The battery device (1000) according to claim 6, characterized in that The bending portion (42) includes a plurality of transverse portions (3101), the plurality of transverse portions (3101) extending along a second direction (Y) and arranged at intervals in the first direction (X), the second direction (Y) being the width direction of the battery device (1000), and the plurality of transverse portions (3101) of the bending portion (42) being bent in sequence and connected along the first direction (X).

8. The battery device (1000) according to claim 7, characterized in that The connection position between two adjacent transverse portions (3101) is bent into a semicircular arc shape.

9. The battery device (1000) according to claim 6, characterized in that The connection position between the first extension portion (41) and the second extension portion (41) is bent into a quarter arc shape, and the connection position between the second extension portion (41) and the bending portion (42) is bent into a quarter arc shape.

10. The battery device (1000) according to claim 1, characterized in that The inlets (3103) and outlets (3104) of the plurality of heat exchange channels (31) are all located at the same end of the battery device (1000) in the first direction (X).

11. The battery device (1000) according to claim 10, 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.

12. The battery device (1000) according to claim 10, 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 the second direction (Y) than the second connection portion (313).

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 14, characterized in that The first connecting portion (312) is in contact with the outermost battery cell (210) in the battery cell assembly (200) and arranged in the second direction (Y) for heat exchange.

16. The battery device (1000) according to claim 14, characterized in that The distance between the first connecting portion (312) and the second connecting portion (313) in the second direction (Y) is smaller than the thickness of the battery cell (210) in the second direction (Y).

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

2.

18. The battery device (1000) according to claim 1, characterized in that The battery cell assembly (200) includes a plurality of rows of battery cells (210), wherein the plurality of battery cells (210) are stacked and arranged in a row along the 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). There are multiple battery cell assemblies (200), and the multiple battery cell assemblies (200) are arranged in sequence along the first direction (X).

19. The battery device (1000) according to claim 18, 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.

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

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

22. The battery device (1000) according to claim 21, characterized in that The heat exchange assembly (300) includes a heat exchange tube (30), the heat exchange tube (30) defines the heat exchange flow channel (31), the bottom plate (110) of the box body (100) is formed with a plurality of ribs (111), 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).

23. An electrical device (1), characterized in that: A battery device (1000) comprising any one of claims 1-22.

24. The electrical device (1) according to claim 23, characterized in that The electrical device (1) is a vehicle, and the first direction (X) is the front-rear direction of the vehicle.

Images