Battery device and electric device

Abstract

The application relates to the technical field of batteries, and discloses a battery device and a power utilization device. The battery device comprises a battery pack, a heat exchange structure and a deformation structure. A battery monomer has a first wall. The heat exchange structure extends along a first direction and is in heat conduction cooperation with a plurality of first walls of the corresponding battery pack. The heat exchange structure has a flow channel cavity. The flow channel cavity is used for forming a flow passage of a heat exchange medium. The flow channel cavity has a medium inlet and a medium outlet. The deformation structure extends along the first direction and is opposite to the plurality of first walls of the corresponding battery pack. The deformation structure is configured to be deformable under pressure, so that the size of the deformation structure in a second direction changes. Therefore, the heat exchange capacity of the heat exchange structure is not easily affected by the assembly tolerance and the expansion force of the battery monomer, so that the battery device has good use reliability.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of both energy density and reliability. Utility Model Content

[0003] This application proposes a battery device and an electrical device, wherein the battery device has good reliability in use.

[0004] In a first aspect, embodiments of this application provide a battery device, comprising: a battery pack, the battery pack including a plurality of battery cells arranged sequentially along a first direction, the battery cells having a first wall parallel to the first direction; a heat exchange structure extending along the first direction and thermally engaging with the plurality of first walls corresponding to the battery pack, the heat exchange structure having a flow channel cavity for forming a flow path for a heat exchange medium, and the flow channel cavity having a medium inlet and a medium outlet; and a deformable structure extending along the first direction and opposite to the plurality of first walls corresponding to the battery pack, the deformable structure being configured to deform under pressure so that the dimensions of the deformable structure change in a second direction, the second direction being perpendicular to the first direction.

[0005] In the above technical solution, by setting a deformable structure that can deform under pressure, the size of the deformable structure in the second direction changes. This allows the size of the deformable structure in the second direction to change during the assembly or use of the battery device, thereby reducing the change in the flow area of ​​the heat exchange structure. This helps to mitigate the problem of reduced flow area in the flow channel cavity caused by assembly or expansion and deformation of individual battery cells, or even the problem of the flow channel cavity being crushed and blocked. This results in smaller changes in the flow rate of the heat exchange medium in the flow channel cavity, improving the problem of heat exchange medium overflow. In other words, the heat exchange medium in the flow channel cavity is less likely to be squeezed out into the external circulation system (e.g., squeezed out into the water tank of the external circulation system) due to excessive reduction in the internal flow area of ​​the heat exchange structure, which would lead to a significant decrease in the heat exchange capacity of the heat exchange structure. This makes it easier to ensure that the flow channel cavity is less likely to be crushed and blocked at the end of the battery device's life cycle, achieving reliable thermal management of individual battery cells, improving the cycle performance of individual battery cells, and enhancing the reliability of the battery device.

[0006] In some embodiments, the dimensional stability of the heat exchange structure in the second direction is better than that of the deformable structure in the second direction.

[0007] In the above technical solution, by setting the dimensional stability of the heat exchange structure in the second direction to be better than that of the deformable structure in the second direction, the dimensions of the deformable structure in the second direction will change before those of the heat exchange structure during the assembly or use of the battery device. In other words, the deformable structure will deform before the heat exchange structure in the second direction. This helps to further reduce the change in the flow area within the heat exchange structure, and even makes the flow area within the heat exchange structure basically unchanged and the flow channel cavity basically undeformed. This helps to make the flow rate of the heat exchange medium in the flow channel cavity change very little or basically unchanged, so as to further improve the overflow problem of the heat exchange medium in the flow channel cavity. This makes the heat exchange structure have a more stable heat exchange capacity, and makes it easier to ensure that the flow channel cavity will not be crushed and blocked at the end of the battery device's life cycle.

[0008] In some embodiments, the deformable structure is configured to include: an elastic buffer pad, the elastic modulus of which is less than the elastic modulus of the heat exchange structure; and / or an elastic compressible shell having a deformable cavity therein, the deformable cavity being isolated from the flow channel cavity.

[0009] In the above technical solutions, regardless of whether the deformable structure is constructed as an elastic buffer pad, an elastic compressible shell, or a combination of both, the deformable structure undergoes elastic deformation under pressure, thereby absorbing the tolerance of the group and the expansion force of the individual battery cells. Moreover, if the compressive force applied to the deformable structure decreases, the amount of deformation of the deformable structure can be reduced accordingly. This facilitates the maintenance of good fit between the deformable structure and other surrounding components. For example, when the deformable structure is clamped between two adjacent battery packs, the deformation structure can remain clamped between the two adjacent battery packs even when the expansion force of the battery pack decreases, making it less likely for the deformable structure to detach from the battery pack.

[0010] In some embodiments, the first wall is the wall with the largest area in the battery cell.

[0011] In the above technical solution, by setting the first wall as the wall with the largest area in the battery cell, the first wall can be understood as the "large surface" of the battery cell, which is conducive to increasing the heat exchange area between the heat exchange structure and the battery cell. Even when the battery cell expands and deforms, the deformation of the battery cell is the largest in the second direction. The deforming structure can also avoid the expansion deformation of the battery cell by its own deformation, absorb the expansion force of the battery cell, and reduce the squeezing force between the heat exchange structure and the battery cell. This is conducive to reducing the deformation of the heat exchange structure and reducing the change in the flow area within the heat exchange structure.

[0012] In some embodiments, the heat exchange structure and the deformable structure are respectively disposed on both sides of the battery pack in the second direction, which are thermally connected with the heat exchange structure; or, the heat exchange structure and the deformable structure are disposed on the same side of the battery pack in the second direction, which are thermally connected with the heat exchange structure.

[0013] In the above technical solutions, the positions of the heat exchange structure and the deformation structure are relatively flexible. Both can regulate the temperature of the battery pack through the heat exchange structure, and absorb the grouping tolerance during the battery pack assembly process and the expansion force generated during the use of the battery pack through the deformation structure.

[0014] In some embodiments, the battery packs are multiple groups arranged sequentially along the second direction, and the heat exchange structure and / or the deformation structure are provided between any two adjacent groups of the battery packs.

[0015] In the above technical solution, by setting a heat exchange structure and / or a deformation structure between any two adjacent battery packs, it is easy to achieve temperature regulation for each battery pack and absorb the group tolerance and expansion force. Moreover, the layout of the heat exchange structure and the deformation structure is relatively flexible, making it easy to reasonably set the number and relative position of the heat exchange structure and the deformation structure according to the actual differentiated needs.

[0016] In some embodiments, two adjacent sets of the battery packs constitute a battery cell, and the heat exchange structure is provided between the two sets of the battery packs in the battery cell, and the deformation structure is provided between two adjacent battery cells.

[0017] In the above technical solution, a heat exchange structure is provided between the two battery packs of the battery unit, and a deformation structure is provided between two adjacent battery units. This allows a battery pack to be set between adjacent heat exchange structures and deformation structures. Under the premise of meeting the requirements for temperature regulation of each battery pack and absorbing the group tolerance and expansion force, it is beneficial to appropriately reduce the number of heat exchange structures and deformation structures, reduce the space occupied by heat exchange structures and deformation structures, and appropriately improve the energy density of the battery device.

[0018] In some embodiments, the heat exchange structure is fixedly connected to the first wall corresponding to the battery pack, and the deformable structure is fixedly connected to the first wall corresponding to the battery pack.

[0019] In the above technical solution, by setting the heat exchange structure to be fixedly connected to the first wall of the corresponding battery pack, and the deformation structure to be fixedly connected to the first wall of the corresponding battery pack, it is easy to realize the reliable connection between the heat exchange structure and the battery pack, and the reliable connection between the deformation structure and the battery pack. At the same time, multiple battery cells of the battery pack can be connected into a whole through the heat exchange structure and the deformation structure. At this time, there is no need to set up side plates, beams and other structures in the battery device, which is conducive to improving the internal space utilization of the battery device and improving the energy density of the battery device.

[0020] In some embodiments, the battery device further includes a housing having a receiving cavity and including a first housing wall that participates in forming the receiving cavity, the first housing wall being opposite to the battery pack in the second direction; the battery device further includes a heat insulation structure disposed between the first housing wall and the battery pack; and / or, in two adjacent heat exchange structures, the flow area of ​​the heat exchange structure closer to the first wall is smaller than the flow area of ​​the heat exchange structure farther from the first wall.

[0021] In the above technical solution, the first housing and the battery pack are insulated by a heat-insulating structure, and / or the flow area of ​​the heat exchange structure closer to the first wall in two adjacent heat exchange structures is smaller than the flow area of ​​the heat exchange structure farther from the first wall. This helps to improve the temperature difference between the battery pack near the first housing wall and other battery packs in other internal locations, and facilitates the improvement of the consistency of the heat exchange environment between the outer battery pack and the inner battery pack. This helps to reduce the temperature difference between the outer battery pack and the inner battery pack, improve the internal temperature distribution of the battery device, reduce the overall temperature difference, and improve the reliability of the battery device.

[0022] In some embodiments, the heat exchange structure is integrated with the deformable structure.

[0023] In the above technical solution, the heat exchange structure and the deformation structure can be assembled as a module, which facilitates the improvement of assembly efficiency.

[0024] In some embodiments, the heat exchange structure and the deformable structure are stacked along the second direction.

[0025] In the above technical solution, the relative positions of the heat exchange structure and the deformation structure are simple, which makes it easy to simplify the arrangement of the flow channel cavity. Moreover, if the deformation structure has a deformation cavity, it is easy to simplify the relative layout of the flow channel cavity and the deformation cavity, which helps to reduce the design cost.

[0026] In some embodiments, the heat exchange structure includes: a first outer shell; a first support member, wherein the first support member is disposed inside the first outer shell and divides the internal space of the first outer shell into a plurality of flow channel cavities, and the first support member is perpendicularly connected to the opposite side walls of the first outer shell in the second direction.

[0027] In the above technical solution, by setting the heat exchange structure to include a first shell and a first support component, and the first support component is perpendicularly connected to the opposite side walls of the first shell in the second direction, the internal space of the first shell is divided into multiple flow channel cavities. This makes the heat exchange structure simple and easy to process. At the same time, the first support component can reliably support the opposite side walls of the first shell, which helps to improve the dimensional stability of the flow channel cavity in the second direction and reduce the amount of deformation of the flow channel cavity under pressure, thereby improving the problem of heat exchange medium overflow in the heat exchange structure.

[0028] In some embodiments, the deformable structure has a deformable cavity, which is isolated from the flow channel cavity, and both extend along the first direction. The integral structure integrating the heat exchange structure and the deformable structure includes: a second outer shell; a partition member disposed within the second outer shell and dividing the internal space of the second outer shell into at least one cavity and a plurality of the deformable cavities; and a second support member disposed within the cavity and dividing the cavity into a plurality of the flow channel cavities, each of the flow channel cavities being adjacent to at least one of the deformable cavities.

[0029] In the above technical solution, the integrated structure combining the heat exchange structure and the deformation structure includes a second shell, a partition component, and a second support component. The partition component divides the internal space of the second shell into at least one cavity and multiple deformation cavities, and the second support component divides the cavity into multiple flow channel cavities. This allows for more flexible layout of the cavity and deformation cavity, enabling diverse design results for the integrated structure. Simultaneously, the second support component supports the cavity, improving its structural stability. This enhances the structural stability of the flow channel cavities during battery assembly or use, reducing changes in the flow area of ​​the heat exchange structure. Furthermore, each flow channel cavity is adjacent to at least one deformation cavity, and the flow channel cavity and its adjacent deformation cavity are relatively close, allowing for better absorption of the expansion force of group tolerances or individual battery cells through the deformation capacity of the deformation cavity, thus reducing the deformation of the adjacent flow channel cavity.

[0030] In some embodiments, the second support member is perpendicularly connected to the second housing; and / or, the second support member is perpendicularly connected to the partition member.

[0031] In the above technical solution, by setting at least one of the second outer shell and the partition component to be perpendicularly connected to the second support component, a stable right-angle structure is formed between at least one of the second outer shell and the partition component and the second support component. This helps to disperse external forces, reduce single-point stress, and improve the support capacity of the second support component, thereby improving the structural stability of the cavity, so as to further improve the structural stability of the flow channel cavity and reduce the deformation of the flow channel cavity under pressure.

[0032] In some embodiments, the second housing includes two first sidewalls disposed opposite to each other along the second direction and two second sidewalls disposed opposite to each other along a third direction, the first direction and the second direction being perpendicular to the third direction, the partitioning member including a plurality of first partitions and at least one second partition, the plurality of first partitions being spaced apart along the third direction, each first partition being arranged along the second direction and having its two ends respectively connected to the two first sidewalls, the second partition being arranged along the third direction and having its two ends respectively connected to the two second sidewalls, each first partition being intersected with each second partition to define, on each side of each second partition in the second direction, the cavity and the deformable cavity being alternately arranged along the third direction, the cavities on opposite sides of the second partition being staggered, and the deformable cavities on opposite sides of the second partition being staggered.

[0033] In the above technical solution, the first and second partition plates, which are arranged in a cross pattern, can be roughly in the form of a mesh structure to divide the internal space of the shell into multiple cavities and multiple deformable cavities. The structure is simple and easy to process. For the second partition plate, the cavity on one side of the second direction is opposite to the deformable cavity on the other side, which helps to reduce the difference in structural stability between the cavities and deformable cavities that are opposite to each other along the second direction. This makes it easier to achieve the dimensional stability of the flow channel cavity in the second direction better than that of the deformable cavity in the second direction by supporting components inside the cavity. At the same time, it is easy to make the flow channel cavity adjacent to at least one deformable cavity.

[0034] In some embodiments, the second support member includes a first support rib, the first support rib being arranged along the second direction, and the two ends of the first support rib being respectively connected to the opposite side walls of the cavity.

[0035] In the above technical solution, by setting the second support component including the first support rib arranged along the second direction, and the two ends being connected to the opposite side cavity walls of the cavity respectively, the cavity can be reliably supported in the second direction, improving the pressure stability of the flow channel cavity in the second direction. At the same time, it is convenient to realize that each flow channel cavity is adjacent to at least one deformation cavity, and the second support component has a simple structure and is easy to process.

[0036] In some embodiments, the second housing includes two first sidewalls disposed opposite to each other along the second direction. The partition includes a third partition plate and a fourth partition plate spaced apart along the second direction. Each of the third partition plate and the fourth partition plate includes a first protrusion and a first recess. A plurality of first protrusions and a plurality of first recesses are alternately disposed along a third direction. The first protrusion of the third partition plate is connected to one of the first sidewalls and is opposite to the first protrusion of the fourth partition plate in the second direction. The first recess of the fourth partition plate is connected to the other first sidewall and is opposite to the first recess of the third partition plate in the second direction. The first direction and the second direction are perpendicular to the third direction. The first recess of the third partition plate defines the deformable cavity between itself and one of the first sidewalls. The first protrusion of the fourth partition plate defines the deformable cavity between itself and the other first sidewall. The deformable cavity has opposite sidewalls in the third direction that are inclined relative to the second direction. The cavity is defined between the third partition plate and the fourth partition plate.

[0037] In the above technical solution, by setting each of the third and fourth partition plates to include a first protrusion and a first recess, and defining a cavity between the third and fourth partition plates, defining multiple deformation cavities between the third partition plate and one of the first sidewalls, and defining multiple deformation cavities between the fourth partition plate and the other first sidewall, it is convenient to make the two cavity walls on opposite sides in the third direction inclined relative to the second direction, thereby weakening the dimensional stability of the deformation cavity in the second direction. At the same time, the supporting component is supported between the third and fourth partition plates, so that even if the third and fourth partition plates deform, the change in the flow area between them is small or basically unchanged. This is beneficial to make the dimensional stability of the heat exchange cavity in the second direction better than that of the deformation cavity in the second direction, thereby effectively improving the problem of heat exchange medium overflow in the heat exchange structure. It also makes it easy to make the flow channel cavity adjacent to at least one deformation cavity.

[0038] In some embodiments, the second support member includes a second support rib and a third support rib, both of which are arranged along the second direction. A plurality of second support ribs and a plurality of third support ribs are alternately arranged along the third direction. The two ends of the second support rib are respectively connected to the first protrusion of the third partition plate and the first protrusion of the fourth partition plate. The two ends of the third support rib are respectively connected to the first recess of the third partition plate and the first recess of the fourth partition plate.

[0039] In the above technical solution, by setting a second support component including a second support rib and a third support transverse rib, and having both ends connected to the opposite side walls of the cavity, the cavity can be reliably supported in the second direction, improving the pressure stability of the flow channel cavity in the second direction. At the same time, the multiple flow channel cavities and multiple deformation cavities separated are alternately arranged in the third direction, so that each flow channel cavity is adjacent to at least one deformation cavity. Moreover, the second support component has a simple structure and is easy to process.

[0040] In some embodiments, one end of the second support rib is connected to the position where the first protrusion of the third partition plate is connected to the first sidewall, and one end of the third support rib is connected to the position where the first recess of the fourth partition plate is connected to the first sidewall.

[0041] In the above technical solution, by setting the second support rib to connect the first protrusion of the third partition plate to the first side wall, and the third support rib to connect the first recess of the fourth partition plate to the first side wall, it is convenient to make the second support rib perpendicularly connected to one of the first side walls and the third support rib perpendicularly connected to the other first side wall. At the same time, since the two cavity walls on opposite sides of the deformation cavity in the third direction are inclined relative to the second direction, the normal direction of the first protrusion of the third partition plate at the connection position with the second support rib is close to the arrangement direction of the second support rib, and the second support rib is even connected to the corresponding first protrusion along the above normal direction. Similarly, the normal direction of the first protrusion of the fourth partition plate at the connection position with the second support rib is close to the arrangement direction of the second support rib, and the second support rib is even connected to the corresponding first protrusion along the above normal direction. This allows the third and fourth partition plates to be perpendicularly connected to the second support rib respectively. Based on the same setting, it is also convenient to make the third and fourth partition plates perpendicularly connected to the third support rib respectively, thereby improving the supporting effect of the second support component and improving the dimensional stability of the flow channel cavity.

[0042] In some embodiments, the second housing includes two first sidewalls disposed opposite to each other along the second direction, and the partition includes a fifth partition plate and a sixth partition plate spaced apart along the second direction. Each of the fifth partition plate and the sixth partition plate includes a second protrusion and a second recess, and a plurality of second protrusions and a plurality of second recesses are alternately disposed along a third direction. The second protrusion of the fifth partition plate is connected to one of the first sidewalls and is opposite to the second recess of the sixth partition plate in the second direction. The second recess of the sixth partition plate is connected to the other first sidewall, and the second recess of the fifth partition plate is connected to the second protrusion of the sixth partition plate. The first direction and the second direction are perpendicular to the third direction, wherein the second protrusion of the fifth partition plate and the second recess of the sixth partition plate define the deformation cavity, the second recess of the fifth partition plate and one of the first sidewalls define the cavity, and the second protrusion of the sixth partition plate and the other first sidewall define the cavity.

[0043] In the above technical solution, by setting each of the third and fourth partition plates to include a first protrusion and a first recess, and defining a cavity between the third and fourth partition plates, defining multiple deformation cavities between the third partition plate and one of the first sidewalls, and defining multiple deformation cavities between the fourth partition plate and the other first sidewall, it is convenient to make the two cavity walls on opposite sides in the third direction inclined relative to the second direction, thereby weakening the dimensional stability of the deformation cavity in the second direction. At the same time, the supporting component is supported between the third and fourth partition plates, so that even if the third and fourth partition plates deform, the change in the flow area between them is small or basically unchanged. This is beneficial to make the dimensional stability of the heat exchange cavity in the second direction better than that of the deformation cavity in the second direction, thereby effectively improving the problem of heat exchange medium overflow in the heat exchange structure. It also makes it easy to make the flow channel cavity adjacent to at least one deformation cavity.

[0044] In some embodiments, the cavity is inclined relative to the second direction on opposite sides of the cavity in the third direction, and the second support member includes a fourth support rib and a fifth support rib connected together. The fourth support rib and the fifth support rib are both inclined relative to the second direction, and one end of the two supports ribs is connected to the first side wall. The other end of the fourth support rib and the other end of the fifth support rib are respectively vertically connected to the opposite sides of the cavity in the third direction.

[0045] In the above technical solution, by setting the cavity walls on the opposite sides of the third direction to be inclined relative to the second direction, it means that the cavity walls on the opposite sides of the third direction of the deformable cavity are also inclined relative to the second direction. This weakens the dimensional stability of the deformable cavity in the second direction. At the same time, the fourth and fifth support ribs are respectively vertically connected to the cavity walls on the opposite sides of the third direction of the cavity. This allows the second support component to reliably support the cavity in the second direction while dividing the cavity into multiple flow channel cavities. This makes it easier to achieve that the dimensional stability of the flow channel cavity in the second direction is better than that of the deformable cavity in the second direction. It also makes it easier to set each flow channel cavity adjacent to at least one deformable cavity.

[0046] Secondly, embodiments of this application provide an electrical device, including the battery device described above.

[0047] In the above technical solution, by adopting the battery device, and the heat diffusion of the battery device is easy to control, and the heat exchange capacity of the heat exchange structure is not easily affected by the assembly of the battery device and the expansion and deformation of the battery cells, it has good reliability, which is conducive to improving the reliability of the power device. Attached Figure Description

[0048] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0049] Figure 1 A schematic diagram of an electrical device provided in an embodiment of this application;

[0050] Figure 2 An exploded view of the battery device provided in the embodiments of this application;

[0051] Figure 3 A schematic diagram of a single battery cell provided in an embodiment of this application;

[0052] Figure 4 This is a partial schematic diagram of a battery device provided in an embodiment of this application;

[0053] Figure 5 for Figure 4 An enlarged view of part A, shown in the center circle;

[0054] Figure 6 for Figure 4 Another schematic diagram of the battery device shown;

[0055] Figure 7 For along Figure 6 Sectional view of the middle BB line;

[0056] Figure 8This is a schematic diagram of the assembly of the battery pack and heat exchange structure provided in the embodiments of this application;

[0057] Figure 9 A schematic diagram of the integrated structure provided in the embodiments of this application;

[0058] Figure 10 for Figure 9 An enlarged view of part A, shown in the center circle;

[0059] Figure 11 A schematic diagram of the integrated structure provided in the embodiments of this application;

[0060] Figure 12 for Figure 11 Another schematic diagram of the integrated structure shown;

[0061] Figure 13 for Figure 12 Enlarged view of section B shown in the center circle;

[0062] Figure 14 A schematic diagram of the integrated structure provided in the embodiments of this application;

[0063] Figure 15 for Figure 14 Enlarged view of section C shown in the middle circle.

[0064] Figure label:

[0065] Electrical device 1000, controller 200, motor 300, battery device 100

[0066] Battery pack 1, battery cell 10, battery cell 11, first wall 111, second wall 112, electrode terminal 113

[0067] Heat exchange structure 2, flow channel cavity 20, cavity 20a, first outer shell 21, first support component 22

[0068] Deformable structure 3, deformable cavity 30, elastic buffer pad 31, elastic compressible shell 32.

[0069] Box 5, Receiving cavity 50, First box 51, Second box 52, First box wall 53

[0070] 6. Integrated structure; 7. Connecting pipe; 61. Second outer shell; 61. First side wall; 611. Second side wall; 612. Separating component; 62. First protrusion; 62a. First recess; 62b. Second protrusion; 62c. Second recess; 62d. First partition plate; 621. Second partition plate; 622. Third partition plate; 623. Fourth partition plate; 624. Fifth partition plate; 625. Sixth partition plate; 626. Second supporting component; 63. First supporting rib; 631. Second supporting rib; 632. Third supporting rib; 633. Fourth supporting rib; 634. Fifth supporting rib; 635. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0072] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0073] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0074] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0075] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0076] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of the various components shown in the accompanying drawings in the embodiments of this application are merely illustrative and should not constitute any limitation on this application.

[0077] In this application, "multiple" means two or more (including two).

[0078] In this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0079] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. Multiple battery cells in the battery device can be connected in series, parallel, or mixed via a busbar. For example, the battery device mentioned in this application can be a battery module or a battery pack. A battery module is formed by arranging and fixing multiple battery cells to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties. A battery pack generally includes a housing for encapsulating one or more battery cells or one or more battery modules. The housing can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells. Of course, the battery device may also not include a housing.

[0080] As an example, the battery device is housed in the housing by fixing battery modules within the housing. Alternatively, the battery device can be housed in the housing by directly fixing multiple individual battery cells to the housing.

[0081] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells; here, "closed" refers to covering or shutting down, and can be sealed or unsealed; the first enclosure may be a top cover or a bottom plate. As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame to form a closed space inside the enclosure to house the individual battery cells.

[0082] In the embodiments of this application, the battery cell may include a secondary battery, a primary battery, etc. A secondary battery refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell may be a lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a sodium lithium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, a sodium-ion battery, or a magnesium-ion battery, etc., and the embodiments of this application are not limited in this regard. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited in this regard either. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited in this regard either.

[0083] For example, a battery cell typically includes a housing, a base plate, an electrode assembly, and an electrolyte. The housing houses the electrode assembly and the electrolyte, and has at least one positive electrode post and at least one negative electrode post. The base plate is placed inside the housing and is located at one end of the electrode assembly to support it. The electrode assembly includes one or more electrode components, which are formed by stacking or winding a positive electrode sheet, a negative electrode sheet, and a separator.

[0084] The positive electrode generally includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as a positive electrode tab. Multiple positive electrode tabs are stacked together and form an electrical connection with the positive electrode post. For example, the multiple stacked positive electrode tabs can be directly welded to the positive electrode post to form an electrical connection; or, the electrode assembly can also include a positive electrode adapter piece. The multiple stacked positive electrode tabs are welded to one end of the positive electrode adapter piece, and the other end of the positive electrode adapter piece is welded to the positive electrode post, so that the positive electrode tabs and the positive electrode post form an electrical connection.

[0085] The negative electrode generally includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer. The negative current collector without the negative active material layer serves as a negative electrode tab. Multiple negative electrode tabs are stacked together and form an electrical connection with the negative electrode post. For example, the stacked negative electrode tabs can be directly welded to the negative electrode post to form an electrical connection; alternatively, the electrode assembly may also include a negative electrode adapter piece. The stacked negative electrode tabs are welded to one end of the negative electrode adapter piece, and the other end of the negative electrode adapter piece is welded to the negative electrode post, so that the negative electrode tabs and the negative electrode post form an electrical connection. The material of the separator is not limited; for example, it can be polypropylene or polyethylene.

[0086] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of both energy density and reliability.

[0087] In related technologies, individual battery cells within a battery device generate heat during operation, typically requiring a heat exchange structure to dissipate this heat. However, this heat exchange structure has ports for receiving and discharging the heat exchange medium, namely a medium inlet and a medium outlet. During assembly and use, the battery device exerts pressure on the heat exchange structure, causing significant deformation. This reduces the flow area of ​​the internal channels, forcing the internal heat exchange medium out and overflowing into the external circulation system's water tank. Consequently, the heat exchange capacity of the structure decreases, impacting the reliability of the battery device and the user experience.

[0088] Based on the above considerations, a battery device is proposed. The battery device includes a battery pack, a heat exchange structure, and a deformable structure. The battery pack includes multiple battery cells arranged sequentially along a first direction. Each battery cell has a first wall parallel to the first direction. The heat exchange structure extends along the first direction and is thermally connected to the multiple first walls of the corresponding battery pack. The heat exchange structure has a flow channel cavity, which forms a flow path for the heat exchange medium. The flow channel cavity has a medium inlet and a medium outlet. The deformable structure extends along the first direction and is opposite to the multiple first walls of the corresponding battery pack. The deformable structure is configured to deform under pressure so that the dimensions of the deformable structure change in a second direction, which is perpendicular to the first direction.

[0089] In the above technical solution, by setting a deformable structure that can deform under pressure, the size of the deformable structure in the second direction changes. This allows the size of the deformable structure in the second direction to change during the assembly or use of the battery device, thereby reducing the change in the flow area of ​​the heat exchange structure. This mitigates the problem of reduced flow area or even crushing and blockage of the flow channel cavity caused by factors such as assembly or expansion and deformation of the battery cells. Consequently, the flow rate of the heat exchange medium in the flow channel cavity remains relatively constant, improving the problem of heat exchange medium overflow. That is, the heat exchange medium in the flow channel cavity is less likely to be squeezed out and flow into the external circulation system (e.g., into the water tank of the external circulation system) due to excessive reduction in the flow area of ​​the flow channel cavity, which would lead to a significant decrease in the heat exchange capacity of the heat exchange structure. This ensures that the flow channel cavity will not be crushed and blocked at the end of the battery device's life cycle, achieving reliable thermal management of the battery cells, improving the cycle performance of the battery cells, and enhancing the reliability of the battery device.

[0090] This application provides an electrical device that uses the battery device of this application as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0091] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the electrical device 1000 and the battery device 100 of this application in detail.

[0092] Please refer to Figure 1 , Figure 1 The electrical device 1000 provided in some embodiments of this application is a structural schematic diagram of a vehicle. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to supply power to the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of starting, navigation, and driving the vehicle. In some embodiments of this application, the battery device 100 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle.

[0093] Please refer to Figure 2 , Figure 2This is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 5 and a plurality of battery cells 11, the battery cells 11 being housed within the housing 5. The housing 5 provides assembly space for the battery cells, and the housing 5 can adopt various structures. In some embodiments, the housing 5 may include a first housing 51 and a second housing 52, the first housing 51 and the second housing 52 overlapping each other, the first housing 51 and the second housing 52 jointly defining a receiving cavity 50 for accommodating the battery cells 11. The second housing 52 may be a hollow structure open at one end, and the first housing 51 may be a plate-like structure, the first housing 51 covering the open side of the second housing 52, so that the first housing 51 and the second housing 52 jointly define the receiving cavity 50; alternatively, the first housing 51 and the second housing 52 may both be hollow structures open on one side (e.g., Figure 2 As shown, the open side of the first box 51 is closed to the open side of the second box 52. Of course, the box 5 formed by the first box 51 and the second box 52 can be of various shapes, such as a cylinder or a cuboid.

[0094] In the battery device 100, multiple battery cells 11 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 11 are connected in both series and parallel configurations. Multiple battery cells 11 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 11 is housed within the housing 5. Alternatively, the battery device 100 can also consist of multiple battery cells 11 first connected in series, parallel, or in a mixed configuration to form a battery cell assembly, and then these battery cell assemblies are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 5. The battery device 100 may also include other structures; for example, the battery device 100 may also include a busbar for realizing the electrical connection between the multiple battery cells 11.

[0095] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell 11 provided in some embodiments of this application. The battery cell 11 is cuboid, with its height direction being a third direction Z, its length direction being a first direction X, and its thickness direction being a second direction Y. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular. The battery cell 11 also includes a second wall 112 connected to a first wall 111, with the first wall 111 and the second wall 112 intersecting each other. The electrode terminals 113 of the battery cell 11 are disposed on the second wall 112; however, this is not a limitation. In other embodiments of this application, the battery cell 11 may also be a polygonal prism, a flat body, or other shapes.

[0096] Please refer to Figures 3-5 In the embodiments of this application, the battery device 100 includes a battery pack 1 and a heat exchange structure 2.

[0097] The battery pack 1 includes a plurality of battery cells 11 arranged sequentially along a first direction. Each battery cell 11 has a first wall 111 parallel to the first direction. A heat exchange structure 2 extends along the first direction and is arranged opposite to the corresponding battery pack 1 along a second direction. The heat exchange structure 2 and the plurality of first walls 111 of the corresponding battery pack 1 are thermally connected. It can be understood that the heat exchange structure 2 and the plurality of first walls 111 on the same side of the corresponding battery pack 1 are thermally connected. The second direction is perpendicular to the first direction and can be the normal direction of the first wall 111.

[0098] It is evident that heat exchange structure 2 and the multiple battery cells 11 of the corresponding battery pack 1 exchange heat. The heat exchange structure 2 contains a flow channel cavity 20, which forms a flow path for the heat exchange medium. The flow channel cavity 20 has a medium inlet and a medium outlet, allowing it to connect with an external circulation system. The heat exchange medium circulates within the flow path formed by the flow channel cavity 20 and the external circulation system. The heat exchange medium flows from the medium inlet to the flow channel cavity 20 and out of the flow channel cavity 20. It can be understood that during the flow of the heat exchange medium through the flow channel cavity 20, heat exchange occurs between the heat exchange structure 2 and the battery cells 11, adjusting the temperature of the battery cells 11. The flow channel cavity 20 provides a flow path for the heat exchange medium, enabling its circulation. This improves the temperature regulation effect on the battery cells 11 and, while ensuring structural reliability, helps reduce the weight of the heat exchange structure 2, making it suitable for applications where the heat exchange structure 2 has a relatively large size in the second direction.

[0099] When a battery cell 11 experiences thermal runaway, the heat generated by the thermal runaway battery cell 11 will be carried away by the heat exchange structure 2, reducing the temperature of the thermal runaway battery cell 11 and improving the problem that other battery cells 11 adjacent to the thermal runaway battery cell 11 will also experience thermal runaway, which is beneficial to improving the reliability of the battery device 100.

[0100] It is understood that the heat exchange medium can be a liquid and / or a gas. Temperature regulation refers to heating or cooling the battery cell 11. When the temperature of the battery cell 11 is too high, the heat exchange medium can cool the battery cell 11 through the heat exchange structure 2 to reduce the temperature of the battery cell 11. When the temperature of the battery cell 11 is too low, the heat exchange medium can heat the battery cell 11 through the heat exchange structure 2 to increase the temperature of the battery cell 11. In the case of cooling the battery cell 11, the heat exchange medium is also called a cooling medium. In addition, the heat exchange medium can also be used for heating, which is not limited in this embodiment. Optionally, the heat exchange medium can be water, a mixture of water and ethylene glycol, heat transfer oil, refrigerant, or air, etc.

[0101] In this embodiment, the heat exchange structure 2 is thermally connected to the plurality of first walls 111 of the battery pack 1, which may include, but is not limited to: the heat exchange structure 2 being in direct contact with the first walls 111 to achieve heat transfer between the heat exchange structure 2 and the battery cell 11; or, the heat exchange structure 2 being indirectly connected to the first walls 111, for example, by providing thermally conductive adhesive between the heat exchange structure 2 and the first walls 111. In short, the thermal connection between the heat exchange structure 2 and the first walls 111 means that heat exchange can occur between the heat exchange structure 2 and the battery cell 11.

[0102] Combination Figure 5 The battery device 100 also includes a deformable structure 3, which extends along a first direction and is opposite to a plurality of first walls 111 of the corresponding battery pack 1. The deformable structure 3 is configured to deform under pressure so that its dimensions change in a second direction. During the assembly of the battery device 100, the deformation of the deformable structure 3 under pressure can absorb the group tolerances in the assembly process of the battery pack 1, the heat exchange structure 2 and the deformable structure 3, which facilitates the assembly of the battery device 100. During the use of the battery device 100, the battery cells 11 expand due to charging and discharging. The deformation of the deformable structure 3 under pressure can absorb the expansion force of the battery cells 11, which helps to reduce the reaction pressure exerted by other components on the battery cells 11 due to their own expansion, thus protecting the battery cells 11.

[0103] It is evident that during the assembly or use of the battery device 100, if the heat exchange structure 2 and the deformable structure 3 are subjected to compressive force in the second direction, the dimensions of the deformable structure 3 in the second direction will change to reduce the amount of change in the flow channel cavity 20 (reduce the amount of reduction in the flow area of ​​the heat exchange structure 2). This is to improve the problem of reduced flow area of ​​the flow channel cavity 20 or even crushing and blockage of the flow channel cavity 20 caused by factors such as assembly or expansion and deformation of the battery cell 11. This helps to minimize the change in the flow rate of the heat exchange medium in the flow channel cavity 20, improve the problem of overflow of the heat exchange medium in the flow channel cavity 20, that is, the heat exchange medium in the flow channel cavity 20 is less likely to be squeezed out and flow into the external circulation system (e.g., squeezed out and flow into the water tank of the external circulation system) due to excessive reduction in the flow area of ​​the flow channel cavity 20, which would lead to a significant decrease in the heat exchange capacity of the heat exchange structure 2. This makes it easier to ensure that the flow channel cavity 20 is less likely to be crushed and blocked at the end of the battery device 100's life cycle, achieve reliable thermal management of the battery cell 11, improve the cycle performance of the battery cell 11, and enhance the reliability of the battery device 100.

[0104] In the above technical solution, by setting the deformable structure 3 to be deformable under pressure, the size of the deformable structure 3 in the second direction changes, so that the size of the deformable structure 3 in the second direction changes during the assembly or use of the battery device 100. This reduces the change in the flow area of ​​the heat exchange structure 2, thereby improving the problem of reduced flow area of ​​the flow channel cavity 20 or even crushing and blockage of the flow channel cavity 20 caused by factors such as assembly or expansion and deformation of the battery cell 11. This helps to minimize the change in the flow rate of the heat exchange medium in the flow channel cavity 20, improve the problem of overflow of the heat exchange medium in the flow channel cavity 20, that is, the heat exchange medium in the flow channel cavity 20 is less likely to be squeezed out into the external circulation system (e.g., squeezed out into the water tank of the external circulation system) due to excessive reduction in the flow area of ​​the flow channel cavity 20, which would cause a significant decrease in the heat exchange capacity of the heat exchange structure 2. This makes it easier to ensure that the flow channel cavity 20 is less likely to be crushed and blocked at the end of the battery device 100's life cycle, achieve reliable thermal management of the battery cell 11, improve the cycle performance of the battery cell 11, and enhance the reliability of the battery device 100.

[0105] In some embodiments, the dimensional stability of the heat exchange structure 2 in the second direction is better than that of the deformable structure 3 in the second direction. It is understood that if the heat exchange structure 2 and the deformable structure 3 are subjected to compressive force in the second direction during the assembly or use of the battery device 100, then the dimension of the deformable structure 3 in the second direction will change before the dimension of the heat exchange structure 2 in the second direction, or in other words, the deformable structure 3 will deform before the heat exchange structure 2 in the second direction.

[0106] In the above technical solution, by setting the dimensional stability of the heat exchange structure 2 in the second direction to be better than that of the deformable structure 3 in the second direction, it is beneficial to further reduce the change in the flow area within the heat exchange structure 2, and even make the flow area within the heat exchange structure 2 basically unchanged and the flow channel cavity 20 basically undeformed. This is beneficial to make the flow rate of the heat exchange medium within the flow channel cavity 20 change very little or basically unchanged, so as to further improve the overflow problem of the heat exchange medium within the flow channel cavity 20, and make the heat exchange structure 2 have a more stable heat exchange capacity, so that the flow channel cavity 20 will not be crushed and blocked at the end of the battery device 100's life cycle.

[0107] It can be understood that dimensional stability refers to the performance of a structure whose external dimensions do not change under external conditions such as mechanical forces. The dimensional stability of heat exchange structure 2 in the second direction is better than that of deformable structure 3 in the second direction. This means that under the same external conditions, such as when heat exchange structure 2 and deformable structure 3 are subjected to the same pressure applied in the second direction, the dimension of deformable structure 3 in the second direction decreases before that of heat exchange structure 2. This is to absorb group tolerances, expansion forces, etc., through deformable structure 3, thereby reducing the amount of dimensional change of heat exchange structure 2 in the second direction during assembly and use, especially the amount of change in the flow area within heat exchange structure 2, and improving the stability of the flow area of ​​the flow channel cavity 20. For example, the flow area within heat exchange structure 2 can be understood as the sum of the flow areas of all flow channel cavities 20 within heat exchange structure 2.

[0108] For example, the deformable structure 3 has a deformable cavity 30, and the dimensional stability of the heat exchange structure 2 in the second direction is better than that of the deformable structure 3 in the second direction. This can be understood as the dimensional stability of the flow channel cavity 20 in the second direction being better than that of the deformable cavity 30 in the second direction.

[0109] In some embodiments, such as Figure 7 and Figure 10 As shown, the deformable structure 3 is constructed to include: an elastic buffer pad 31 and / or an elastic compressible shell 32. The elastic modulus of the elastic buffer pad 31 is less than that of the heat exchange structure 2. Therefore, during the assembly or use of the battery device 100, when the heat exchange structure 2 and the deformable structure 3 are compressed, the elastic buffer pad 31 undergoes elastic deformation before the heat exchange structure 2, and the size of the elastic buffer pad 31 decreases in the second direction, thereby absorbing the group tolerance and the expansion force of the battery cell 11. The elastic compressible shell 32 has a deformable cavity 30, which is isolated from the flow channel cavity 20. That is, the deformable cavity 30 is not connected to the flow channel cavity 20, and the heat exchange medium in the flow channel cavity 20 cannot flow into the deformable cavity 30. Therefore, when the elastic compressible shell 32 is subjected to pressure in the second direction, it undergoes compressive elastic deformation before the heat exchange structure 2, and the size of the elastic compressible shell 32 decreases in the second direction, thereby absorbing the group tolerance and the expansion force of the battery cell 11.

[0110] It is understood that when the deformable structure 3 is constructed to include an elastic buffer pad 31 and an elastic compressible shell 32, the elastic buffer pad 31 can be disposed outside the deformable cavity 30, for example, the elastic buffer pad 31 and the elastic compressible shell 32 are stacked along the second direction; or, the elastic buffer pad 31 can also be disposed inside the deformable cavity 30.

[0111] Regardless of whether the deformable structure 3 is constructed as an elastic buffer pad 31, an elastic compressible shell 32, or includes both, the deformable structure 3 will undergo elastic deformation when compressed. If the compressive force applied to the deformable structure 3 decreases, the amount of deformation of the deformable structure 3 can be reduced accordingly. This facilitates the deformable structure 3 to always maintain good fit with other surrounding components. For example, when the deformable structure 3 is clamped between two adjacent battery packs 1, and the expansion force of the battery pack 1 decreases, the deformable structure 3 can still be clamped between the two adjacent battery packs 1, and it is not easy for the deformable structure 3 to disengage from the battery pack 1.

[0112] In some embodiments, such as Figure 3 and Figure 4 As shown, the first wall 111 is the wall with the largest area in the battery cell 11.

[0113] It can be seen that the first wall 111 can be understood as the "large surface" of the battery cell 11. The heat exchange area between the heat exchange structure 2 and the battery cell 11 is large, which is conducive to improving the heat exchange efficiency between the heat exchange structure 2 and the battery cell 11, improving the thermal management performance of the battery cell 11, making it easier to keep the temperature of the battery cell 11 in a normal state, and improving the service life and performance of the battery cell 11.

[0114] In the above technical solution, by setting the first wall 111 as the wall with the largest area in the battery cell 11, it is beneficial to increase the heat exchange area between the heat exchange structure 2 and the battery cell 11. Even when the battery cell 11 expands and deforms, the deformation of the battery cell 11 is the largest in the second direction. The deformation structure 3 can also avoid the expansion and deformation of the battery cell 11 by its own deformation, absorb the expansion force of the battery cell 11, and reduce the squeezing force between the heat exchange structure 2 and the battery cell 11. This is beneficial to reduce the deformation of the heat exchange structure 2 and reduce the change in the flow area inside the heat exchange structure 2.

[0115] Of course, in other embodiments of this application, the first wall 111 may not be the wall with the largest area in the battery cell 11, for example, combined with Figure 3 The thickness direction of the battery cell 11 can be the first direction X, and the first wall 111 can also be a side wall adjacent to the "large surface" of the battery cell 11.

[0116] In some embodiments, such as Figure 7As shown, the heat exchange structure 2 and the deformable structure 3 are respectively disposed on both sides of the battery pack 1 in the second direction, which is thermally connected with the heat exchange structure 2. Therefore, for the aforementioned battery pack 1, the heat exchange structure 2 can regulate the temperature of the battery pack 1, while the deformable structure 3 can absorb the assembly tolerances generated during the battery pack 1 assembly process and the expansion forces generated during the use of the battery pack 1. Furthermore, since the deformable structure 3 is not fitted between the heat exchange structure 2 and the battery pack 1, the material requirements for the deformable structure 3 can be reduced to some extent.

[0117] In some embodiments, the heat exchange structure 2 and the deformable structure 3 are disposed on the same side of the battery pack 1 in the second direction, in a thermally conductive manner with the heat exchange structure 2. In this case, the heat exchange structure 2 can be disposed between the deformable structure 3 and the battery pack 1; or, the deformable structure 3 can be disposed between the heat exchange structure 2 and the battery pack 1, in which case the deformable structure 3 can be a heat-conducting element, selected from materials with good thermal conductivity, thus achieving heat exchange between the heat exchange structure 2 and the battery pack 1. In the above scheme, the temperature of the battery pack 1 can be regulated through the heat exchange structure 2, and the deformation structure 3 can absorb the grouping tolerances generated during the assembly process of the battery pack 1 and the expansion forces generated during the use of the battery pack 1.

[0118] It can be seen that the positions of heat exchange structure 2 and deformation structure 3 are relatively flexible, making it easy to set them up in groups according to actual differentiated needs.

[0119] In some embodiments, such as Figures 4-8 As shown, there are multiple battery packs 1, which are arranged sequentially along the second direction. A heat exchange structure 2 and / or a deformation structure 3 are provided between any two adjacent battery packs 1.

[0120] For example, battery pack 1 consists of two groups, with a heat exchange structure 2 and a deformation structure 3 between the two groups of battery pack 1; battery pack 1 consists of three groups, namely the first group, the second group and the third group, with a heat exchange structure 2 and / or a deformation structure 3 between the first group and the second group, and a heat exchange structure 2 and / or a deformation structure 3 between the second group and the third group; similarly, battery pack 1 consists of four or more groups, with a heat exchange structure 2 and / or a deformation structure 3 between each pair of adjacent battery pack 1.

[0121] In the above technical solution, by setting a heat exchange structure 2 and / or a deformable structure 3 between any two adjacent battery packs 1, it is easy to achieve temperature regulation for each battery pack 1 and absorb the group tolerance and expansion force. Moreover, the layout of the heat exchange structure 2 and the deformable structure 3 is relatively flexible, and it is easy to reasonably set the number and relative position of the heat exchange structure 2 and the deformable structure 3 according to the actual differentiated needs.

[0122] It is understood that when a heat exchange structure 2 and a deformable structure 3 are provided between two adjacent battery packs 1, the heat exchange structure 2 and the deformable structure 3 are stacked along the second direction. Of course, the heat exchange structure 2 and the deformable structure 3 can also be in other structural forms. It can be seen that in the embodiments of this application, when the heat exchange structure 2 and the deformable structure 3 are stacked along the second direction: the heat exchange structure 2 and the deformable structure 3 are separate parts, and the two are assembled together; or, the heat exchange structure 2 and the deformable structure 3 are integrated into one piece.

[0123] In some embodiments, such as Figure 4 and Figure 5 As shown, two adjacent battery packs 1 constitute a battery unit 10. Multiple battery units 10 can be arranged sequentially along the second direction. A heat exchange structure 2 is provided between two battery packs 1 of the battery unit 10, and a deformation structure 3 is provided between two adjacent battery units 10. At this time, a set of battery packs 1 can be provided between adjacent heat exchange structures 2 and deformation structures 3. Under the premise of meeting the temperature regulation of each set of battery packs 1 and absorbing the grouping tolerance and expansion force, it is beneficial to appropriately reduce the number of heat exchange structures 2 and deformation structures 3, reduce the space occupied by heat exchange structures 2 and deformation structures 3, and appropriately improve the energy density of the battery device 100.

[0124] In some embodiments, such as Figure 3 and Figure 7 As shown, the heat exchange structure 2 is fixedly connected to the first wall 111 of the corresponding battery pack 1, and the deformable structure 3 is fixedly connected to the first wall 111 of the corresponding battery pack 1.

[0125] For the heat exchange structure 2, for example, if the heat exchange structure 2 is located between two adjacent battery packs 1, then the two opposite sides of the heat exchange structure 2 are respectively fixedly connected to the first walls 111 of the two battery packs 1; or, for example, if the heat exchange structure 2 is located between the deformable structure 3 and the battery pack 1, then one side of the heat exchange structure 2 is fixedly connected to the first wall 111 of the battery pack 1 (of course, the other side of the heat exchange structure 2 can be fixedly connected to the deformable structure 3). Of course, other configurations are also possible, where the heat exchange structure 2 has a battery pack 1 on one side in the second direction, but no battery pack 1 on the other side, and the surface of the heat exchange structure 2 facing the battery pack 1 is fixedly connected to the first wall 111 of the battery pack 1.

[0126] For the deformable structure 3, for example, if the deformable structure 3 is located between two adjacent battery packs 1, then the two opposite sides of the deformable structure 3 are respectively fixedly connected to the first walls 111 of the two battery packs 1; or, for example, if the deformable structure 3 is located between the heat exchange structure 2 and the battery pack 1, then one side of the deformable structure 3 is fixedly connected to the first wall 111 of the battery pack 1 (of course, the other side of the deformable structure 3 can be fixedly connected to the heat exchange structure 2). Of course, other configurations are also possible, where the deformable structure 3 has a battery pack 1 on one side in the second direction, but no battery pack 1 on the other side, and the surface of the deformable structure 3 facing the battery pack 1 is fixedly connected to the first wall 111 of the battery pack 1.

[0127] In the above technical solution, by setting the heat exchange structure 2 to be fixedly connected to the first wall 111 of the corresponding battery pack 1, and the deformation structure 3 to be fixedly connected to the first wall 111 of the corresponding battery pack 1, it is convenient to realize the reliable connection between the heat exchange structure 2 and the battery pack 1, and the reliable connection between the deformation structure 3 and the battery pack 1. At the same time, the multiple battery cells 11 of the battery pack 1 can be connected into a whole through the heat exchange structure 2 and the deformation structure 3. At this time, there is no need to set side plates, beams and other structures inside the battery device 100, which is conducive to improving the internal space utilization of the battery device 100 and improving the energy density of the battery device 100.

[0128] In this embodiment of the application, no specific restrictions are placed on the connection method between the heat exchange structure 2 and the first wall 111, or on the connection method between the deformable structure 3 and the first wall 111. For example, the heat exchange structure 2 and the first wall 111 can be bonded and fixed, and the deformable structure 3 can be bonded and fixed to the first wall 111.

[0129] For example, two adjacent battery packs 1 constitute a battery unit 10, and multiple battery units 10 can be arranged sequentially along the second direction. A heat exchange structure 2 is provided between the two battery packs 1 of the battery unit 10. The two side surfaces of the heat exchange structure 2 in the second direction are fixedly connected to multiple first walls 111 of the two battery packs 1 respectively. A deformable structure 3 is provided between two adjacent battery units 10. The two side surfaces of the deformable structure 3 in the second direction are fixedly connected to multiple first walls 111 of the two battery units 10 that are opposite to each other.

[0130] In some embodiments, such as Figure 4 As shown, the battery device 100 also includes a housing 5, which has a receiving cavity 50, and the housing 5 includes a first housing wall 53 that participates in forming the receiving cavity 50. The first housing wall 53 is opposite to the battery pack 1 in a second direction. Exemplarily, the housing 5 has two first housing walls 53 that are opposite to each other in the second direction.

[0131] The battery device 100 also includes a heat insulation structure located between the first housing wall 53 and the battery pack 1. This heat insulation structure increases the thermal resistance between the outermost battery pack 1 and the first housing wall 53 in the second direction, which helps reduce heat exchange between the outermost battery pack 1 and the first housing wall 53. This improves the temperature uniformity of the multiple battery packs 1 in the entire battery device 100 and reduces the temperature difference between the multiple battery packs 1. And / or, in two adjacent heat exchange structures 2, the one closer to the first wall 111... If the flow area of ​​the heat exchange structure 2 is smaller than that of the heat exchange structure 2 that is farther from the first wall 111, then the flow rate of the heat exchange medium in the heat exchange structure 2 that is closer to the first wall 111 is smaller than that in the heat exchange structure 2 that is farther from the first wall 111. This reduces the temperature regulation efficiency of the outermost battery pack 1 in the second direction through the heat exchange structure 2, which helps to improve the temperature uniformity of the multiple battery packs 1 in the entire battery device 100 and reduce the temperature difference of the multiple battery packs 1 in the battery device 100.

[0132] Typically, when there are multiple battery packs 1, the outer battery packs 1 surround the inner battery packs 1. The heat exchange efficiency of the outer battery packs 1 is usually greater than the heat exchange area of ​​the inner battery packs 1, resulting in a certain temperature difference between the outer and inner battery packs 1. In the above technical solution, the first housing 51 and the battery packs 1 are insulated by a heat insulation structure, and / or, the flow area of ​​the heat exchange structure 2 closer to the first wall 111 is smaller than the flow area of ​​the heat exchange structure 2 farther from the first wall 111. This helps to improve the temperature difference between the battery packs 1 near the first housing wall 53 and other battery packs 1 in other internal locations, and facilitates the consistency of the heat exchange environment between the outer and inner battery packs 1. This helps to reduce the temperature difference between the outer and inner battery packs 1, improve the internal temperature distribution of the battery device 100, reduce the overall temperature difference, and improve the reliability of the battery device 100.

[0133] For example, the thermal insulation structure may include at least one of a thermal insulation pad and thermal insulation fins, wherein the thermal insulation pad and thermal insulation fins may be thermal insulation plastic parts. It is understood that when the housing 5 includes a first housing 51 and a second housing 52, the first housing wall 53 may be formed in the first housing 51 or in the second housing 52.

[0134] In some embodiments, such as Figure 9 , Figure 12 and Figure 14 As shown, the heat exchange structure 2 and the deformable structure 3 are integrated into one unit. Therefore, the heat exchange structure 2 and the deformable structure 3 can be assembled as a module, which facilitates improved assembly efficiency.

[0135] It should be noted that in the embodiments of this application, the integration of heat exchange structure 2 and deformable structure 3 does not necessarily mean that heat exchange structure 2 and deformable structure 3 constitute a single unit. Rather, it means that heat exchange structure 2 and deformable structure 3 can be connected into a single structure through integrated connection or assembly means. For example, heat exchange structure 2 and deformable structure 3 are separate parts, and the two are connected into a single unit through assembly means. Or, for example, at least a part of heat exchange structure 2 is integrally connected with at least a part of deformable structure 3. In this case, the above arrangement may include a scheme in which heat exchange structure 2 and deformable structure 3 form a single unit, or it may include a first part in which a part of heat exchange structure 2 is integrally connected with a part of deformable structure 3, and a second part in which another part of heat exchange structure 2 is integrally connected with another part of deformable structure 3, with the first part and the second part connected through assembly means, but it is not limited to this.

[0136] Of course, in other embodiments of this application, such as Figure 5 and Figure 7 As shown, the heat exchange structure 2 and the deformable structure 3 are separate components. In this case, their relative arrangement is more flexible, and the position of one does not restrict the position of the other too much. For example, the heat exchange structure 2 and the deformable structure 3 can be respectively set on both sides of the battery pack 1 that is thermally connected with the heat exchange structure 2 in the second direction.

[0137] In some embodiments, the heat exchange structure 2 and the deformable structure 3 are integrated into one unit, and the heat exchange structure 2 and the deformable structure 3 are stacked along the second direction. The relative positions of the heat exchange structure 2 and the deformable structure 3 are simple, which facilitates the arrangement of the flow channel cavity 20. Moreover, if the deformable structure 3 has a deformable cavity 30, it is easier to simplify the relative layout of the flow channel cavity 20 and the deformable cavity 30, which helps to reduce design costs.

[0138] For example, the heat exchange structure 2 and the deformable structure 3 are stacked along the second direction, and the deformable structure 3 includes an elastic buffer pad 31, which is stacked on one side of the heat exchange structure 2 in the second direction; or, for another example, the heat exchange structure 2 and the deformable structure 3 are stacked along the second direction, and the deformable structure 3 includes an elastic compressible shell 32, which is stacked on one side of the heat exchange structure 2 in the second direction.

[0139] In this embodiment of the application, when the heat exchange structure 2 and the deformable structure 3 are stacked along the second direction, the heat exchange structure 2 and the deformable structure 3 can be separate parts. At this time, the two can be fixedly connected, and the connection method between the two is not specifically limited. Of course, in the above stacking arrangement, the heat exchange structure 2 and the deformable structure 3 can also be integrated into one unit.

[0140] In some embodiments, such as Figure 7As shown, the heat exchange structure 2 includes a first outer shell 21 and a first support component 22. The first support component 22 is disposed inside the first outer shell 21 and divides the internal space of the first outer shell 21 into multiple flow channel cavities 20. The first support component 22 is perpendicularly connected to the opposite side walls of the first outer shell 21 in the second direction.

[0141] In the above technical solution, by setting the heat exchange structure 2 to include a first outer shell 21 and a first support component 22, and the first support component 22 is perpendicularly connected to the opposite side walls of the first outer shell 21 in the second direction, the internal space of the first outer shell 21 is divided into multiple flow channel cavities 20, making the heat exchange structure 2 simple in structure and easy to process. At the same time, the first support component 22 can reliably support the opposite side walls of the first outer shell 21, which is beneficial to improve the dimensional stability of the flow channel cavity 20 in the second direction and reduce the amount of deformation of the flow channel cavity 20 under pressure, thereby improving the problem of heat exchange medium overflow in the heat exchange structure 2.

[0142] For example, such as Figure 7 As shown, the first support component 22 includes a plurality of support ribs spaced apart along a third direction. The support ribs are arranged along a second direction, and a flow channel cavity 20 can be defined between two adjacent support ribs. The opposite side walls of the first outer shell 21 in the second direction are perpendicularly connected to the two ends of the support ribs, respectively.

[0143] In some embodiments, such as Figure 9 , Figure 12 and Figure 14 As shown, the deformable structure 3 has a deformable cavity 30, which is isolated from the flow channel cavity 20, and both the deformable cavity 30 and the flow channel cavity 20 extend along the first direction. It is evident that the heat exchange medium in the flow channel cavity 20 will not flow into the deformable cavity 30; for example, the flow channel cavity 20 has openings at both ends in the first direction for the heat exchange medium to flow in and out, while the deformable cavity 30 is closed at both ends in the first direction.

[0144] For example, when there are multiple heat exchange structures 2, the multiple heat exchange structures 2 can be arranged at intervals along the second direction, and the two ends of the multiple heat exchange structures 2 are respectively connected through connecting pipes 7 to realize the connection of the multiple heat exchange structures 2 and the circulation of the heat exchange medium; further, as Figure 8 As shown, multiple heat exchange structures 2 and multiple battery packs 1 are arranged alternately along the second direction.

[0145] like Figure 9 , Figure 12 and Figure 14As shown, the integrated structure 6, which combines the heat exchange structure 2 and the deformable structure 3, includes a second outer shell 61, a partition component 62, and a second support component 63. The partition component 62 is disposed inside the second outer shell 61 and divides the internal space of the second outer shell 61 into at least one cavity 20a and multiple deformable cavities 30. The second support component 63 is disposed in the cavity 20a and divides the cavity 20a into multiple flow channel cavities 20, each flow channel cavity 20 being adjacent to at least one deformable cavity 30.

[0146] It is understood that the integrated structure 6 does not necessarily mean that it constitutes a single piece, but rather that the heat exchange structure 2 and the deformable structure 3 can be connected by an integrated connection or assembly method to form a whole structure, which can be installed as a whole. For example, the second shell 61, the partition component 62 and the second support component 63 are integrally formed parts.

[0147] For example, the partition member 62 divides the internal space of the second outer shell 61 into a cavity 20a and a plurality of deformable cavities 30. A second support member 63 is provided within the cavity 20a to further divide the cavity 20a into a plurality of flow channel cavities 20. Alternatively, the partition member 62 divides the internal space of the second outer shell 61 into a plurality of cavities 20a and a plurality of deformable cavities 30. A second support member 63 is provided within each cavity 20a, and the second support member 63 divides the corresponding cavity 20a into a plurality of flow channel cavities 20. It can be understood that the second outer shell 61 has a plurality of flow channel cavities 20 and a plurality of deformable cavities 30; the cavities 20a and deformable cavities 30 can constitute the internal space of the second outer shell 61, or the internal space of the second outer shell 61 may include cavities 20a and deformable cavities 30, as well as other cavities.

[0148] Each flow channel cavity 20 is adjacent to at least one deformation cavity 30. The flow channel cavity 20 and the deformation cavity 30 are separated by a partition member 62. The flow channel cavity 20 is located on one side of the partition member 62, and the deformation cavity 30 adjacent to the flow channel cavity 20 is located on the other side of the partition member 62. Thus, the flow channel cavity 20 and the adjacent deformation cavity 30 are relatively close to each other, so that the deformation capacity of the deformation cavity 30 can better absorb the expansion force of the group tolerance or the battery cell 11, reduce the deformation of the adjacent flow channel cavity 20, and improve the problem of heat exchange medium overflow.

[0149] In the above technical solution, the integrated structure 6, which combines the heat exchange structure 2 and the deformation structure 3, includes a second outer shell 61, a partition component 62, and a second support component 63. The partition component 62 divides the internal space of the second outer shell 61 into at least one cavity 20a and multiple deformation cavities 30, and the second support component 63 divides the cavity 20a into multiple flow channel cavities 20, making the layout of the cavity 20a and the deformation cavity 30 more flexible and realizing diversified design of the integrated structure 6. At the same time, the second support component 63 can support the cavity 20a, improve the structural stability of the cavity 20a, and improve the structural stability of the flow channel cavity 20 during the assembly or use of the battery device 100, thereby reducing the change in the flow area of ​​the heat exchange structure 2. Moreover, each flow channel cavity 20 is adjacent to at least one deformation cavity 30, and the flow channel cavity 20 and its adjacent deformation cavity 30 are relatively close, so as to better absorb the expansion force of the group tolerance or the battery cell 11 through the deformation capacity of the deformation cavity 30, thereby reducing the deformation of the adjacent flow channel cavity 20.

[0150] It is understood that when there are multiple cavities 20a, each cavity 20a is provided with a second support component 63.

[0151] In some embodiments, such as Figure 9 , Figure 12 As shown, the second support member 63 is vertically connected to the second housing 61; and / or, as Figure 9 , Figure 12 and Figure 14 As shown, the second support member 63 is perpendicularly connected to the partition member 62. In other words, at least one of the second housing 61 and the partition member 62 is perpendicularly connected to the second support member 63.

[0152] It is understood that if at least one of the second housing 61 and the partition member 62 extends along a curve at the connection position with the second support member 63, then the second support member 63 can be connected and arranged along the normal direction of the curve to achieve a vertical connection between the second housing 61 and the partition member 62 and the second support member 63 at the curve position.

[0153] In the above technical solution, by setting at least one of the second outer shell 61 and the partition component 62 to be perpendicularly connected to the second support component 63, a stable right-angle structure is formed between at least one of the second outer shell 61 and the partition component 62 and the second support component 63. This helps to disperse external forces, reduce single-point stress, and improve the support capacity of the second support component 63, thereby improving the structural stability of the cavity 20a, so as to further improve the structural stability of the flow channel cavity 20 and reduce the deformation of the flow channel cavity 20 under pressure.

[0154] In some embodiments, such as Figure 9 and Figure 10As shown, the second outer shell 61 includes two first sidewalls 611 and two second sidewalls 612. The two first sidewalls 611 are arranged opposite each other along a second direction, and the two second sidewalls 612 are arranged opposite each other along a third direction. The first and second directions are perpendicular to the third direction, respectively. The partition member 62 includes a plurality of first partition plates 621 and at least one second partition plate 622. The plurality of first partition plates 621 are spaced apart along a third direction. Each first partition plate 621 is arranged along the second direction (the plane in which the first partition plate 621 is located is parallel to the second direction), and each first partition plate 621 is connected to two first sidewalls 611 at both ends in the second direction. The second partition plate 622 is arranged along a third direction (the first... The plane containing the second partition plate 622 is parallel to the third direction, and the two ends of the second partition plate 622 in the third direction are respectively connected to two second sidewalls 612. Each first partition plate 621 and each second partition plate 622 are arranged crosswise so that each side of each second partition plate 622 in the second direction defines cavities 20a and deformable cavities 30 arranged alternately along the third direction. The cavities 20a on opposite sides of the second partition plate 622 in the second direction are staggered, and the deformable cavities 30 on opposite sides of the second partition plate 622 in the second direction are staggered, so that the cavity 20a on one side of the second partition plate 622 in the second direction is opposite to the deformable cavity 30 on the other side.

[0155] In the above technical solution, the first partition plate 621 and the second partition plate 622, which are arranged in a cross configuration, can be roughly in the form of a mesh structure to divide the internal space of the outer shell into multiple cavities 20a and multiple deformable cavities 30. This structure is simple and easy to manufacture. Furthermore, for the second partition plate 622, the cavity 20a on one side of the second direction is opposite to the deformable cavity 30 on the other side. This helps to reduce the difference in structural stability between the cavities 20a and the deformable cavities 30 that are opposite each other along the second direction. This facilitates the use of supporting components inside the cavity 20a to achieve a dimensional stability in the second direction that is superior to that of the deformable cavity 30. It also facilitates the adjacent arrangement of the flow channel cavity 20 and at least one deformable cavity 30. For example, when there is only one second partition plate 622, such as... Figure 9 and Figure 10 As shown, the flow channel cavity 20 located at the edge position in the third direction can be adjacent to one deformable cavity 30, and the flow channel cavity 20 located in the middle position can be adjacent to one or two deformable cavities 30; for example, when the partition member 62 includes a plurality of second partition plates 622, the plurality of second partition plates 622 can be spaced apart along the second direction to facilitate the cavity 20a being adjacent to the plurality of deformable cavities 30.

[0156] For example, multiple deformable cavities 30 have equal dimensions in the second direction and in the third direction, and multiple cavities 20a have equal dimensions in the second direction and in the third direction. Both deformable cavities 30 and cavities 20a have equal dimensions in the second direction and in the third direction. A support member is provided inside the cavity 20a so that the support member divides the cavity 20a into multiple flow channel cavities 20. This facilitates further improvement of the structural stability of the flow channel cavities 20 relative to the deformable cavity 30, so that the dimensional stability of the flow channel cavities 20 in the second direction is better than that of the deformable cavity 30 in the second direction.

[0157] Optionally, both the first partition plate 621 and the second partition plate 622 are formed as flat plates; of course, in other examples, at least one of the first partition plate 621 and the second partition plate 622 can also be formed as a curved plate, in which case the arrangement of the curved plate is parallel to the second direction.

[0158] In some embodiments, such as Figure 9 and Figure 10 As shown, the second support component 63 includes a first support rib 631. The first support rib 631 is arranged along the second direction, and the plane where the first support rib 631 is located is parallel to the second direction. The two ends of the first support rib 631 in the second direction are respectively connected to the opposite two sides of the cavity 20a.

[0159] For example, when there is one second partition plate 622, each first support rib 631 is connected to the first sidewall 611 and the second partition plate 622 at both ends in the second direction, for example, each first support rib 631 is perpendicularly connected to the first sidewall 611, and / or, each first support rib 631 is perpendicularly connected to the second partition plate 622; when there are multiple second partition plates 622, for a first support rib 631 located between two adjacent second partition plates 622, the two ends of the first support rib 631 in the second direction are respectively connected to the two second partition plates 622 (for example, the first support rib 631 is perpendicularly connected to at least one of the two second partition plates 622), and for a first support rib 631 located between a second partition plate 622 and a first sidewall 611, the two ends of the first support rib 631 in the second direction are respectively connected to the first sidewall 611 and the second partition plate 622 (for example, the first support rib 631 is perpendicularly connected to the first sidewall 611, and / or, the first support rib 631 is perpendicularly connected to the second partition plate 622).

[0160] In the above technical solution, by setting the second support component 63 including the first support rib 631 arranged along the second direction, and the two ends respectively connected to the opposite side cavity walls of the cavity 20a, the cavity 20a is reliably supported in the second direction, improving the pressure stability of the flow channel cavity 20 in the second direction, and at the same time facilitating the realization that each flow channel cavity 20 is adjacent to at least one deformable cavity 30, and the second support component 63 has a simple structure and is easy to process.

[0161] It is understood that the second support component 63 may include a first support rib 631, which has a simple structure. In this case, each cavity 20a can be divided into two flow channel cavities 20 corresponding to the second support component 63, and each flow channel cavity 20 is adjacent to at least one deformable cavity 30. The second support component 63 may also include a plurality of first support ribs 631 arranged at intervals along a third direction. In this case, each cavity 20a can be divided into three or more flow channel cavities 20, and each flow channel cavity 20 is also adjacent to at least one deformable cavity 30.

[0162] In some embodiments, such as Figures 11-13 As shown, the second outer casing 61 includes two first sidewalls 611 disposed opposite each other along a second direction. The partition member 62 includes a third partition plate 623 and a fourth partition plate 624 disposed at intervals along the second direction. Each of the third partition plate 623 and the fourth partition plate 624 includes a first protrusion 62a and a first recess 62b. A plurality of first protrusions 62a and a plurality of first recesses 62b on each of the third partition plate 623 and the fourth partition plate 624 are alternately disposed along a third direction. The first protrusion 62a of the third partition plate 623 is connected to one of the first sidewalls 611, and the first protrusion 62a of the third partition plate 623 is opposite to the first protrusion 62a of the fourth partition plate 624 in the second direction. The first recess of the fourth partition plate 624... 62b is connected to another first sidewall 611, and the first recess 62b of the fourth partition plate 624 is opposite to the first recess 62b of the third partition plate 623 in the second direction. The first and second directions are perpendicular to the third direction, respectively. A deformation cavity 30 is defined between the first recess 62b of the third partition plate 623 and one of the first sidewalls 611. The deformation cavity 30 is located between two adjacent first protrusions 62a of the third partition plate 623. A deformation cavity 30 is defined between the first protrusion 62a of the fourth partition plate 624 and the other first sidewall 611. The deformation cavity 30 is located between two adjacent first recesses 62b of the fourth partition plate 624. A cavity 20a is defined between the third partition plate 623 and the fourth partition plate 624. The two cavity walls of the deformation cavity 30 in the third direction are inclined relative to the second direction.

[0163] It is understood that, for the deformable cavity 30 between the first recess 62b of the third partition plate 623 and one of the first sidewalls 611, the first recess 62b defines the opposite two cavity walls of the deformable cavity 30 in the third direction. Similarly, for the deformable cavity 30 between the first protrusion 62a of the fourth partition plate 624 and the other first sidewall 611, the first protrusion 62a defines the opposite two cavity walls of the deformable cavity 30 in the third direction. For example, the cross-sectional shape of the deformable cavity 30 can be approximately triangular, and the third partition plate 623 and the fourth partition plate 624 can be approximately formed as wavy plate structures.

[0164] In the above technical solution, by setting each of the third partition plate 623 and the fourth partition plate 624 to include a first protrusion 62a and a first recess 62b, and defining a cavity 20a between the third partition plate 623 and the fourth partition plate 624, defining multiple deformable cavities 30 between the third partition plate 623 and one of the first sidewalls 611, and defining multiple deformable cavities 30 between the fourth partition plate 624 and the other first sidewall 611, it is convenient to make the two opposite cavity walls in the third direction inclined relative to the second direction, so as to weaken the dimensional stability of the deformable cavity 30 in the second direction to a certain extent. At the same time, the supporting component is supported between the third partition plate 623 and the fourth partition plate 624, so that even if the third partition plate 623 and the fourth partition plate 624 deform, the change in the flow area between them is small or basically unchanged. This is beneficial to make the dimensional stability of the heat exchange cavity in the second direction better than that of the deformable cavity 30 in the second direction, thereby effectively improving the problem of heat exchange medium overflow in the heat exchange structure 2, and also making it convenient to make the flow channel cavity 20 adjacent to at least one deformable cavity 30.

[0165] In some embodiments, such as Figure 12 and Figure 13 As shown, the second support component 63 includes a second support rib 632 and a third support rib 633. Both the second support rib 632 and the third support rib 633 are arranged along a second direction (e.g., the planes containing the second support rib 632 and the third support rib 633 are parallel to the second direction). Multiple second support ribs 632 and multiple third support ribs 633 are alternately arranged along a third direction. A third support rib 633 is provided between two adjacent second support ribs 632, and a second support rib 632 is provided between two adjacent third support ribs 633. The two ends of the second support rib 632 in the second direction are respectively connected to the first protrusion 62a of the third partition plate 623 and the first protrusion 62a of the fourth partition plate 624. The two ends of the third support rib 633 in the second direction are respectively connected to the first recess 62b of the third partition plate 623 and the first recess 62b of the fourth partition plate 624. It can be understood that the third sealing plate and the fourth partition plate 624 respectively define the opposite side walls of the cavity 20a in the second direction.

[0166] As can be seen, a flow channel cavity 20 is defined between the adjacent second support rib 632 and the third support rib 633. Thus, the multiple deformation cavities 30 and multiple flow channel cavities 20 in the shell can be alternately arranged along the third direction, so that each flow channel cavity 20 is arranged adjacent to one or two deformation cavities 30.

[0167] In the above technical solution, by setting the second support component 63 including the second support rib 632 and the third support transverse rib, and connecting the two ends to the opposite side cavity walls of the cavity 20a respectively, the cavity 20a is reliably supported in the second direction, thereby improving the pressure stability of the flow channel cavity 20 in the second direction. At the same time, the multiple flow channel cavities 20 and multiple deformation cavities 30 separated are alternately arranged in the third direction, so that each flow channel cavity 20 is adjacent to at least one deformation cavity 30. Moreover, the second support component 63 has a simple structure and is easy to process.

[0168] In some embodiments, such as Figure 12 and Figure 13 As shown, one end of the second support rib 632 is connected to the position where the first protrusion 62a of the third partition plate 623 connects to the first side wall 611. Thus, the second support rib 632, one of the first side walls 611, and the first protrusion 62a of the third partition plate 623 are connected. The second support rib 632 is arranged along the second direction to facilitate a perpendicular connection between the second support rib 632 and one of the first side walls 611. One end of the third support rib 633 is connected to the position where the first recess 62b of the fourth partition plate 624 connects to the first side wall 611. Thus, the third support rib 633, the other first side wall 611, and the first recess 62b of the fourth partition plate 624 are connected. The third support rib 633 is arranged along the second direction to facilitate a perpendicular connection between the third support rib 633 and the other first side wall 611.

[0169] It is understood that one end of the second support rib 632 in the second direction is connected to one of the first sidewalls 611, and the other end is connected to the first protrusion 62a of the fourth partition plate 624, so that the other end of the second support rib 632 is spaced apart from the other first sidewall 611; one end of the third support rib 633 in the second direction is connected to the other first sidewall 611, and the other end is connected to the first recess 62b of the third partition plate 623, so that the other end of the third support rib 633 is spaced apart from the aforementioned first sidewall 611.

[0170] In the above technical solution, by setting the second support rib 632 to connect the first protrusion 62a of the third partition plate 623 to the first side wall 611, and the third support rib 633 to connect the first recess 62b of the fourth partition plate 624 to the first side wall 611, it is convenient to make the second support rib 632 perpendicularly connected to one of the first side walls 611 and the third support rib 633 perpendicularly connected to the other first side wall 611. At the same time, since the two cavity walls of the deformation cavity 30 are inclined relative to the second direction in the third direction, the normal of the first protrusion 62a of the third partition plate 623 at the connection position with the second support rib 632 is the same as the arrangement direction of the second support rib 632. The second support rib 632 is connected to the corresponding first protrusion 62a along the aforementioned normal direction, and the normal direction of the first protrusion 62a of the fourth partition plate 624 at the connection position with the second support rib 632 is close to the arrangement direction of the second support rib 632, or the second support rib 632 is connected to the corresponding first protrusion 62a along the aforementioned normal direction, so that the third partition plate 623 and the fourth partition plate 624 are respectively perpendicularly connected to the second support rib 632. Based on the same arrangement, it is also convenient to realize that the third partition plate 623 and the fourth partition plate 624 are respectively perpendicularly connected to the third support rib 633, thereby improving the supporting effect of the second support component 63 and improving the dimensional stability of the flow channel cavity 20.

[0171] In some embodiments, such as Figure 14 and Figure 15 As shown, the second outer casing 61 includes two first sidewalls 611 disposed opposite to each other along a second direction; the partition member 62 includes a fifth partition plate 625 and a sixth partition plate 626 disposed at intervals along a second direction, each of the fifth partition plate 625 and the sixth partition plate 626 including a second protrusion 62c and a second recess 62d, and the plurality of second protrusions 62c and the plurality of second recesses 62d are alternately disposed along a third direction, the second protrusion 62c of the fifth partition plate 625 is connected to one of the first sidewalls 611, and the second protrusion 62c of the fifth partition plate 625 and the second recess 62d of the sixth partition plate 626 are disposed in the second direction. Relative to each other, the second recess 62d of the sixth partition plate 626 is connected to another first sidewall 611, and the second recess 62d of the fifth partition plate 625 is connected to the second protrusion 62c of the sixth partition plate 626. The first direction and the second direction are perpendicular to the third direction, respectively. A deformation cavity 30 is defined between the second protrusion 62c of the fifth partition plate 625 and the second recess 62d of the sixth partition plate 626. A cavity 20a is defined between the second recess 62d of the fifth partition plate 625 and one of the first sidewalls 611. A cavity 20a is defined between the second protrusion 62c of the sixth partition plate 626 and the other first sidewall 611.

[0172] As can be seen, a plurality of cavities 20a are defined between the fifth partition plate 625 and one of the first sidewalls 611, spaced apart along a third direction. These cavities 20a are referred to as the first cavity row. A plurality of cavities 20a are defined between the sixth partition plate 626 and the other first sidewall 611, spaced apart along a third direction. These cavities 20a are referred to as the second cavity row. Each cavity 20a in the second cavity row is positioned opposite to the corresponding cavity 20a in the first cavity row along a second direction. A plurality of deformable cavities 30 are defined between the fifth partition plate 625 and the sixth partition plate 626, spaced apart along a third direction. These deformable cavities 30 are alternately arranged with the cavities 20a in the first cavity row along a third direction, and similarly, they are alternately arranged with the cavities 20a in the second cavity row along a third direction.

[0173] In the above technical solution, by setting each of the third partition plate 623 and the fourth partition plate 624 to include a first protrusion 62a and a first recess 62b, and defining a cavity 20a between the third partition plate 623 and the fourth partition plate 624, defining multiple deformable cavities 30 between the third partition plate 623 and one of the first sidewalls 611, and defining multiple deformable cavities 30 between the fourth partition plate 624 and the other first sidewall 611, it is convenient to make the two opposite cavity walls in the third direction inclined relative to the second direction, so as to weaken the dimensional stability of the deformable cavity 30 in the second direction to a certain extent. At the same time, the supporting component is supported between the third partition plate 623 and the fourth partition plate 624, so that even if the third partition plate 623 and the fourth partition plate 624 deform, the change in the flow area between them is small or basically unchanged. This is beneficial to make the dimensional stability of the heat exchange cavity in the second direction better than that of the deformable cavity 30 in the second direction, thereby effectively improving the problem of heat exchange medium overflow in the heat exchange structure 2, and also making it convenient to make the flow channel cavity 20 adjacent to at least one deformable cavity 30.

[0174] In some embodiments, such as Figure 14 and Figure 15 As shown, the cavity 20a has two opposite cavity walls in the third direction that are inclined relative to the second direction. The second support member 63 includes a fourth support rib 634 and a fifth support rib 635 connected to each other. Both the fourth support rib 634 and the fifth support rib 635 are inclined relative to the second direction. One end of the fourth support rib 634 and the fifth support rib 635 is connected to the first side wall 611. The other end of the fourth support rib 634 and the other end of the fifth support rib 635 are respectively vertically connected to the opposite cavity walls of the cavity 20a in the third direction.

[0175] It is understood that, for the cavity 20a between the second recess 62d of the fifth partition plate 625 and one of the first sidewalls 611, the second recess 62d defines the opposite two cavity walls of the cavity 20a in the third direction. Similarly, for the cavity 20a between the second protrusion 62c of the sixth partition plate 626 and the other first sidewall 611, the second protrusion 62c defines the opposite two cavity walls of the cavity 20a in the third direction. For example, the fifth partition plate 625 and the sixth partition plate 626 are respectively generally formed as corrugated plate structures, the cross-sectional shape of the deformable cavity 30 can be approximately square, and the cross-sectional shape of the cavity 20a is approximately triangular.

[0176] In the above technical solution, by setting the cavity 20a with its two sides inclined relative to the second direction in the third direction, it means that the cavity walls of the deformable cavity 30 with its two sides inclined relative to the second direction in the third direction, which weakens the dimensional stability of the deformable cavity 30 in the second direction to a certain extent. At the same time, the fourth support rib 634 and the fifth support rib 635 are respectively vertically connected to the two sides of the cavity 20a in the third direction, so that while the second support member 63 divides the cavity 20a into multiple flow channel cavities 20, the second support member 63 can reliably support the cavity 20a in the second direction. This makes it easier to achieve that the dimensional stability of the flow channel cavity 20 in the second direction is better than that of the deformable cavity 30 in the second direction, and also makes it easier to set each flow channel cavity 20 adjacent to at least one deformable cavity 30.

[0177] Secondly, embodiments of this application provide an electrical device 1000, including the aforementioned battery device 100, which is used to provide electrical energy.

[0178] In the above technical solution, since the power device 1000 adopts the battery device 100, and the heat diffusion of the battery device 100 is easy to control, and the heat exchange capacity of the heat exchange structure 2 is not easily affected by the assembly of the battery device 100 and the expansion and deformation of the battery cell 11, it has good reliability, which is conducive to improving the reliability of the power device 1000.

[0179] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0180] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery pack, comprising a plurality of battery cells arranged sequentially along a first direction, wherein each battery cell has a first wall parallel to the first direction; A heat exchange structure extends along the first direction and is thermally connected to a plurality of first walls corresponding to the battery pack. The heat exchange structure has a flow channel cavity, which is used to form a flow passage for the heat exchange medium, and the flow channel cavity has a medium inlet and a medium outlet. A deformable structure extending along the first direction and opposite to a plurality of first walls corresponding to the battery pack, the deformable structure being configured to deform under pressure so that its dimensions change in a second direction perpendicular to the first direction.

2. The battery device according to claim 1, characterized in that, The heat exchange structure exhibits better dimensional stability in the second direction than the deformable structure.

3. The battery device according to claim 1, characterized in that, The deformable structure is configured to include: An elastic buffer pad, wherein the elastic modulus of the elastic buffer pad is less than the elastic modulus of the heat exchange structure; and / or, An elastic compressible shell has a deformation cavity inside, and the deformation cavity is isolated from the flow channel cavity.

4. The battery device according to claim 1, wherein, The first wall is the wall with the largest area in the battery cell.

5. The battery device according to claim 1, characterized in that, The heat exchange structure and the deformable structure are respectively disposed on both sides of the battery pack in the second direction, in thermally conductive cooperation with the heat exchange structure; or, The heat exchange structure and the deformable structure are located on the same side of the battery pack in the second direction, in which the heat exchange structure conducts thermally with the battery pack.

6. The battery device according to claim 1, characterized in that, The battery packs are multiple and arranged sequentially along the second direction, and the heat exchange structure and / or the deformation structure are provided between any two adjacent battery packs.

7. The battery device according to claim 6, characterized in that, Two adjacent battery packs constitute a battery cell. The heat exchange structure is provided between the two battery packs of the battery cell, and the deformation structure is provided between two adjacent battery cells.

8. The battery device according to claim 6, characterized in that, The heat exchange structure is fixedly connected to the first wall corresponding to the battery pack, and the deformable structure is fixedly connected to the first wall corresponding to the battery pack.

9. The battery device according to claim 6, characterized in that, It also includes a housing with a receiving cavity and a first housing wall that helps to form the receiving cavity, the first housing wall being opposite to the battery pack in the second direction. The battery device further includes a heat insulation structure disposed between the first casing wall and the battery pack; and / or, In two adjacent heat exchange structures, the heat exchange structure closer to the first wall has a smaller flow area than the heat exchange structure farther from the first wall.

10. The battery device according to any one of claims 1-6 and 8-9, characterized in that, The heat exchange structure is integrated with the deformable structure.

11. The battery device according to claim 10, characterized in that, The heat exchange structure and the deformable structure are stacked along the second direction.

12. The battery device according to claim 11, characterized in that, The heat exchange structure includes: First outer shell; A first support component is disposed inside the first housing and divides the internal space of the first housing into a plurality of flow channel cavities. The first support component is perpendicularly connected to the opposite side walls of the first housing in the second direction.

13. The battery device according to claim 10, characterized in that, The deformable structure has a deformable cavity, which is isolated from the flow channel cavity, and both extend along the first direction. The integral structure integrating the heat exchange structure and the deformable structure includes: Second outer shell; A partition component, wherein the partition component is disposed within the second housing and divides the internal space of the second housing into at least one cavity and a plurality of the deformable cavities; A second support member is disposed in the cavity and divides the cavity into a plurality of flow channel cavities, each of the flow channel cavities being adjacent to at least one of the deformable cavities.

14. The battery device according to claim 13, characterized in that, The second support component is perpendicularly connected to the second housing; and / or, The second support component is vertically connected to the partition component.

15. The battery device according to claim 13, characterized in that, The second housing includes two first sidewalls disposed opposite each other along the second direction and two second sidewalls disposed opposite each other along the third direction, wherein the first direction and the second direction are perpendicular to the third direction. The separating component includes a plurality of first separating plates and at least one second separating plate. The plurality of first separating plates are spaced apart along the third direction. Each first separating plate is arranged along the second direction and its two ends are respectively connected to two first sidewalls. The second separating plate is arranged along the third direction and its two ends are respectively connected to two second sidewalls. Each first separating plate and each second separating plate are arranged intersectingly to define, on each side of each second separating plate in the second direction, the cavity and the deformable cavity arranged alternately along the third direction. The cavities on opposite sides of the second separating plate are staggered, and the deformable cavities on opposite sides of the second separating plate are also staggered.

16. The battery device according to claim 15, characterized in that, The second support component includes a first support rib, which is arranged along the second direction, and the two ends of the first support rib are respectively connected to the opposite side walls of the cavity.

17. The battery device according to claim 13, characterized in that, The second housing includes two first sidewalls disposed opposite each other along the second direction. The separating component includes a third separating plate and a fourth separating plate spaced apart along the second direction. Each of the third separating plate and the fourth separating plate includes a first protrusion and a first recess. A plurality of first protrusions and a plurality of first recesses are alternately arranged along the third direction. The first protrusion of the third separating plate is connected to one of the first sidewalls and is opposite to the first protrusion of the fourth separating plate in the second direction. The first recess of the fourth separating plate is connected to the other first sidewall and is opposite to the first recess of the third separating plate in the second direction. The first direction and the second direction are perpendicular to the third direction. The deformation cavity is defined between the first recess of the third partition plate and one of the first sidewalls, and the deformation cavity is defined between the first protrusion of the fourth partition plate and the other first sidewall. The deformation cavity is inclined relative to the second direction on opposite sidewalls in the third direction, and the cavity is defined between the third partition plate and the fourth partition plate.

18. The battery device according to claim 17, characterized in that, The second support component includes a second support rib and a third support rib. Both the second support rib and the third support rib are arranged along the second direction. A plurality of second support ribs and a plurality of third support ribs are alternately arranged along the third direction. The two ends of the second support rib are respectively connected to the first protrusion of the third partition plate and the first protrusion of the fourth partition plate. The two ends of the third support rib are respectively connected to the first concave part of the third partition plate and the first concave part of the fourth partition plate.

19. The battery device according to claim 18, characterized in that, One end of the second support rib is connected to the position where the first protrusion of the third partition plate is connected to the first side wall, and one end of the third support rib is connected to the position where the first recess of the fourth partition plate is connected to the first side wall.

20. The battery device according to claim 13, characterized in that, The second housing includes two first sidewalls disposed opposite each other along the second direction. The separating component includes a fifth separating plate and a sixth separating plate spaced apart along the second direction. Each of the fifth and sixth separating plates includes a second protrusion and a second recess. Multiple second protrusions and multiple second recesses are alternately arranged along a third direction. The second protrusion of the fifth separating plate is connected to one of the first sidewalls and is opposite to the second recess of the sixth separating plate in the second direction. The second recess of the sixth separating plate is connected to the other first sidewall. The second recess of the fifth separating plate is connected to the second protrusion of the sixth separating plate. The first and second directions are perpendicular to the third direction. The deformation cavity is defined between the second protrusion of the fifth partition plate and the second recess of the sixth partition plate; the cavity is defined between the second recess of the fifth partition plate and one of the first sidewalls; and the cavity is defined between the second protrusion of the sixth partition plate and the other first sidewall.

21. The battery device according to claim 20, characterized in that, The cavity is inclined relative to the second direction on opposite sides of the third direction. The second support component includes a fourth support rib and a fifth support rib connected together. Both the fourth support rib and the fifth support rib are inclined relative to the second direction, and one end of both is connected to the first side wall. The other ends of the fourth support rib and the fifth support rib are respectively vertically connected to the opposite sides of the cavity on opposite sides of the third direction.

22. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-21.

Images