Battery device, method of assembling a battery device, and electric device

Abstract

The application discloses a battery device, an assembling method of the battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a box body and a battery monomer assembly. The battery monomer assembly is arranged in the box body and comprises a heat management unit and a plurality of battery monomer groups. The heat management unit comprises a current collection assembly and a plurality of heat exchange components. The plurality of heat exchange components are arranged at intervals along a first direction. Each adjacent two heat exchange components are provided with a battery monomer group. The current collection assembly is located on at least one side of the battery monomer group along a second direction and comprises a plurality of current collection components. Each adjacent two heat exchange components are connected through the current collection components between heat exchange end portions located at the same end in the second direction. At least one end of the current collection component along the first direction is connected with the heat exchange end portion through a flexible connection structure. A floating gap is formed between the end of the current collection component connected with the heat exchange end portion through the flexible connection structure and the heat exchange end portion. According to the battery device, the temperature regulation efficiency is relatively high, and the assembling efficiency is relatively high.

Description

Technical Field

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

[0002] In related technologies, a thermal management unit is installed within the battery device to regulate the temperature of individual battery cells. To increase the temperature regulation efficiency of the thermal management unit for individual battery cells, the thermal management unit is configured to include multiple heat exchange plates and multiple manifolds, with battery cell groups arranged between adjacent heat exchange plates to improve heat exchange efficiency, thereby enhancing the temperature regulation efficiency of the thermal management unit for individual battery cells.

[0003] However, due to the limitations of the battery device structure, the battery device assembly process requires first assembling a single heat exchange plate and a single battery cell group into a unit, then using tooling to install a single manifold to the end of the heat exchange plate, and then connecting another unit consisting of a single heat exchange plate and a single battery cell group, repeating this process to complete the installation of the battery cell group and thermal management unit at the module level. The assembly process is extremely cumbersome, takes a long time, and has low efficiency.

[0004] Therefore, optimizing the structure of battery devices to improve assembly efficiency is a technical problem that needs to be solved. Summary of the Invention

[0005] In view of the above problems, this application provides a battery device, a battery device assembly method and an electrical device. The thermal management unit in the battery device has high efficiency in regulating the temperature of individual battery cells, and the assembly process of the battery device is simple and convenient, with high assembly efficiency.

[0006] In a first aspect, this application provides a battery device, including a housing and a battery cell assembly. The battery cell assembly is disposed within the housing and includes a thermal management unit and multiple sets of battery cell groups. Each set of battery cell groups includes at least one battery cell. The thermal management unit includes a current collector assembly and multiple heat exchange components. The multiple heat exchange components are spaced apart along a first direction, and a battery cell group is disposed between every two adjacent heat exchange components. The battery cell group is thermally connected to the heat exchange components. The current collector assembly is located on at least one side of the battery cell group along a second direction and includes multiple current collector components. The second direction intersects the first direction. The heat exchange components are arranged along the second direction... The end of the heat exchange component is the heat exchange end. Each pair of adjacent heat exchange components located at the same end in the second direction are connected by the flow collecting component. The heat exchange component has a heat exchange channel for the flow of the heat exchange medium. The flow collecting component has a flow collecting channel for the flow of the heat exchange medium. The heat exchange channel and the flow collecting channel are in communication. At least one end of the flow collecting component along the first direction is connected to the heat exchange end by a flexible connection structure, so that the spacing between two adjacent heat exchange components is adjustable along the first direction. A floating gap is formed between the end of the flow collecting component connected to the heat exchange end by the flexible connection structure and the corresponding heat exchange end.

[0007] In the above technical solution, by setting the thermal management unit to include a current collector and multiple heat exchange components, and the battery cell assembly is set between two adjacent heat exchange components, both sides of each battery cell assembly can exchange heat with the heat exchange components, which can improve the temperature regulation efficiency of the battery cells; by setting the current collector to include multiple current collectors and each current collector connected between the heat exchange ends of two adjacent heat exchange components, and by making at least one end of the current collector along the first direction connected to the heat exchange end through a flexible connection structure, the spacing between two adjacent heat exchange components is adjustable along the first direction, so that the thermal management unit can be assembled first during the assembly of the battery cell assembly.

[0008] Since the spacing between two adjacent heat exchange components in the thermal management unit is adjustable along the first direction, and a floating gap is formed between the end of the current collector and the heat exchange end connected by the flexible connection structure and the corresponding heat exchange end, the spacing between two adjacent heat exchange components along the first direction can be adjusted by adjusting the size of the floating gap during the assembly of the thermal management unit with multiple battery cell groups. The assembled thermal management unit can be stretched along a first direction, causing the flexible connection structure between the current collector and the heat exchange end to extend along the first direction. This increases the size of the floating gap in the first direction, thereby increasing the distance between two adjacent heat exchange components. This facilitates the insertion of multiple battery cell groups between adjacent heat exchange components. Then, the thermal management unit and multiple battery cell groups are pressed together along the first direction, compressing the flexible connection structure between the current collector and the heat exchange end. This reduces the size of the floating gap in the first direction, thereby reducing the distance between two adjacent heat exchange components. This allows multiple heat exchange components and multiple battery cell assemblies to be assembled together through integral pressing. The assembly process is simple and convenient, improving the assembly efficiency of battery cell assemblies. The assembled battery cell assemblies can be placed into a box as a whole, thereby improving the assembly efficiency of the battery device and shortening the assembly time.

[0009] In some embodiments, the flexible connection structure includes a flexible connector, which includes a first fixing part, a second fixing part, and a deformable part. The deformable part is connected between the first fixing part and the second fixing part. The first fixing part is connected to the current collection component, and the second fixing part is connected to the heat exchange end. The deformable part can deform at least in the first direction.

[0010] In the above technical solution, by making the flexible connection structure include a flexible connector and the flexible connector includes a first fixing part, a second fixing part and a deformable part, wherein the first fixing part and the second fixing part are respectively connected to the current collection component and the heat exchange end, it is convenient to fix the flexible connector. Furthermore, by making the deformable part deformable at least along the first direction, the size of the deformable part along the first direction can be changed by stretching or compressing the heat management unit along the first direction, thereby making the spacing between two adjacent heat exchange components along the first direction adjustable.

[0011] In some embodiments, the deformable portion may deform radially along the current collecting member, the radial direction of which is perpendicular to the first direction.

[0012] In the above technical solution, the deformable part can deform along the first direction to achieve adjustable spacing between two adjacent heat exchange components along the first direction. Furthermore, the deformable part can deform radially along the current collector component. In this way, when assembling multiple heat exchange components and multiple current collector components, the radial assembly tolerance of the current collector component can be absorbed by utilizing the radial deformation of the deformable part along the current collector component. This allows multiple current collector components located on the same side of the battery cell pack in the second direction to be coaxially arranged, reducing dimensional accuracy requirements and facilitating installation.

[0013] In some embodiments, the flexible connector is a soft rubber component.

[0014] In the above technical solution, by setting the flexible connector as a soft rubber part, the flexible connector can have better flexibility and deformation ability; in addition, the flexible connector can also play a better sealing role in the assembly between the collector and the heat exchange end.

[0015] In some embodiments, at least a portion of the flexible connector is integrally injection molded onto the current collection component.

[0016] In the above technical solution, by integrally injection molding at least part of the flexible connector onto the current collector, the assembly process between the flexible connector and the current collector can be eliminated, further improving the assembly efficiency of the battery device; the assembly gap between the flexible connector and the current collector is also reduced or avoided, further improving the sealing performance between the flexible connector and the current collector; in addition, the connection between the flexible connector and the current collector can be made more reliable.

[0017] In some embodiments, the first fixing part, the second fixing part, and the deformable part are all annular structures arranged around the current collecting component.

[0018] In the above technical solution, by setting both the first fixing part and the second fixing part as an annular structure surrounding the heat collection component, the connection area between the first fixing part and the heat collection component and the second fixing part and the heat exchange end can be increased, thereby improving the stability and reliability of the connection between the flexible connector and the heat collection component and the heat exchange end. At the same time, by setting the deformable part as an annular structure surrounding the heat collection component, the connection between the heat collection component and the heat exchange end can be made more stable and reliable, which is also conducive to further improving the sealing effect of the flexible connection structure between the heat collection component and the heat exchange end.

[0019] In some embodiments, the connection between the deformable part and the first fixing part is the first connection point, the connection between the deformable part and the second fixing part is the second connection point, the direction from the first connection point to the second connection point is the extension direction of the deformable part, and the extension direction of the deformable part has an angle with the first direction and the radial direction of the current collecting component.

[0020] In the above technical solution, by making the extension direction of the deformable part form an angle with both the first direction and the radial direction of the heat exchange component, the deformable part is inclined. This facilitates deformation of the deformable part during the stretching or compression of the heat management unit along the first direction, and allows the deformable part to have deformation in both the first direction and the radial direction of the heat exchange component. This makes it convenient to adjust the spacing between two adjacent heat exchange components along the first direction, and also absorbs the radial assembly tolerance of the heat exchange component, reduces the dimensional accuracy requirements, and facilitates installation.

[0021] In some embodiments, the floating gap includes an axial floating gap, the heat exchange end includes an end body and a first connecting protrusion, the first connecting protrusion is disposed on at least one side of the end body along the first direction and surrounds the flow collecting member, the second fixing part is connected to the first connecting protrusion, and at least one end of the flow collecting member along the first direction is spaced apart from the end body in the first direction to form the axial floating gap.

[0022] In the above technical solution, by setting the heat exchange end to include an end body and a first connecting protrusion ring protruding from at least one side of the end body along the first direction, and the second fixing part being connected to the first connecting protrusion ring, the connection and assembly between the heat exchange end and the heat collection component is facilitated, and the stability of the connection and assembly is enhanced. Furthermore, by making at least one end of the heat collection component along the first direction spaced apart from the end body in the first direction to form an axial floating gap, a floating space is provided for the floating of the heat collection component in the first direction. By stretching or compressing the heat management unit, the deformable part of the flexible connector is deformed, thereby changing the size of the axial floating gap in the first direction, and thus the spacing between two adjacent heat exchange components can be easily adjusted.

[0023] In some embodiments, the floating gap includes a radial floating gap, wherein the first connecting convex ring and the current collecting component are spaced apart in the radial direction of the current collecting component to form the radial floating gap.

[0024] In the above technical solution, based on the fact that at least one end of the heat exchanger component is spaced apart from the end body in the first direction to form an axial floating gap, thereby allowing adjustment of the distance between two adjacent heat exchange components, the first connecting convex ring is further spaced apart from the heat exchanger component in the radial direction to form a radial floating gap. This provides floating space for the heat exchanger component to float in the radial direction, can absorb the radial assembly tolerance of the heat exchanger component, reduce dimensional accuracy requirements, and facilitate installation.

[0025] In some embodiments, the first connecting protrusion surrounds the outer periphery of the current collecting component, and in the first direction, the deformable portion is connected to the side of the first fixing portion along the first direction and away from the end body, and the second fixing portion is located on the outer periphery of the deformable portion.

[0026] In the above technical solution, by having the first connecting protrusion ring surround the outer periphery of the collecting component, at least one end of the collecting component along the first direction can be inserted into the first connecting protrusion ring, facilitating the connection and assembly of the collecting component and the heat exchange component; the deformable part is connected to the side of the first fixing part along the first direction and away from the end body, and the second fixing part is located on the outer periphery of the deformable part, thus forming a space for the deformable part to deform between the outer periphery of the collecting component and the inner periphery of the first connecting protrusion ring; and this not only achieves a flexible connection between at least one end of the collecting component along the first direction and the heat exchange end, but also allows the flexible connector to act as a sealing element, better sealing the assembly gap between at least one end of the collecting component and the heat exchange end.

[0027] In some embodiments, the current collecting component includes a current collecting tube body and a protrusion. The protrusion is connected to at least one end of the current collecting tube body along the first direction and is disposed around the current collecting tube body. The protrusion protrudes from the current collecting tube body along the first direction. A first annular cavity is formed in the first fixing part and disposed around the current collecting tube body. The protrusion is accommodated in the first annular cavity. An axial floating gap is formed between the first fixing part and the end body in the first direction.

[0028] In the above technical solution, by configuring the collector component to include a collector tube body and a protrusion disposed at at least one end of the collector tube body along the first direction, and making the first fixing part cover the outside of the protrusion, the connection and fixing area between the flexible connector and the collector component can be increased, thereby improving the reliability and stability of the connection between the flexible connector and the collector component. Furthermore, by forming an axial floating gap between the first fixing part and the end body in the first direction, a floating space can be provided for the floating of the collector component in the first direction. By stretching or compressing the heat management unit along the first direction, the deformable part of the flexible connector is deformed, thereby changing the size of the axial floating gap in the first direction, and thus the spacing between two adjacent heat exchange components can be easily adjusted.

[0029] In some embodiments, the protrusion extends radially outward from the outer peripheral surface of the manifold.

[0030] In the above technical solution, while the protrusion protrudes from the manifold body along the first direction, the protrusion also protrudes from the outer circumferential surface of the manifold body along the radial direction. This can further increase the connection and fixing area between the flexible connector and the manifold component, further improve the reliability and stability of the connection between the flexible connector and the manifold component, and also improve the sealing performance of the connection between the flexible connector and the manifold component.

[0031] In some embodiments, the flexible connection structure further includes a connecting ring, the connecting ring having a hardness greater than that of the flexible connector. The connecting ring includes a first ring portion and a second ring portion. The first ring portion surrounds the outer periphery of the first connecting protrusion and is sealed to the first connecting protrusion. The second ring portion is connected to the side of the first ring portion along the first direction and away from the end body. The second ring portion surrounds the outer periphery of the current collecting component and is spaced apart from the current collecting component in the radial direction of the current collecting component. The second fixing portion is connected to the second ring portion.

[0032] In the above technical solution, by including a connecting ring with a relatively higher hardness than the flexible connector in the flexible connection structure, and by having the first ring portion of the connecting ring surround and connect to the first connecting protrusion ring, and the second ring portion surround the outer periphery of the collector component and connect to the second fixing portion, when the flexible connection structure is connected to the heat exchange end, the first connecting protrusion ring of the heat exchange end is inserted into the connecting ring of the flexible connection structure and fixedly connected to the first ring portion of the connecting ring, making the connection operation between the flexible connection structure and the heat exchange end more convenient; by having the second ring portion and the collector component spaced apart in the radial direction of the collector component, there is a receiving space for accommodating the deformable portion between the inner periphery of the second ring portion and the outer periphery of the collector component, and the deformable portion has sufficient deformation space in the receiving space, thereby facilitating the adjustment of the distance between two adjacent heat exchange components along the first direction.

[0033] In some embodiments, a second annular cavity is formed within the second fixing portion, surrounding the current collecting component, and the second annular portion is accommodated within the second annular cavity.

[0034] In the above technical solution, by having the second fixing part cover the second ring part, the connection and fixing area between the flexible connector and the connecting ring can be increased, thereby improving the reliability and stability of the connection between the flexible connector and the connecting ring.

[0035] In some embodiments, the second fixing portion is integrally injection molded onto the connecting ring.

[0036] In the above technical solution, by integrally injection molding the second fixing part onto the connecting ring, the assembly process between the flexible connector and the connecting ring can be eliminated, further improving the assembly efficiency of the battery device; it also reduces or avoids the assembly gap between the flexible connector and the connecting ring, further improving the sealing performance between the flexible connector and the connecting ring; in addition, it can make the connection between the flexible connector and the connecting ring more reliable.

[0037] In some embodiments, the first ring portion is welded to the first connecting protrusion ring.

[0038] In the above technical solution, by welding the first ring portion to the first connecting protrusion ring, the connection between the connecting ring and the first connecting protrusion ring can be made more reliable and stable, which in turn makes the connection between the flexible connection structure and the heat exchange end more reliable and stable. Moreover, the weld formed by welding has a sealing effect on the assembly gap between the first ring portion and the first connecting protrusion ring.

[0039] In some embodiments, a first sealing element is provided between the inner peripheral wall of the first ring portion and the outer peripheral wall of the first connecting protrusion ring.

[0040] In the above technical solution, by providing a first sealing element between the inner peripheral wall of the first ring portion and the outer peripheral wall of the first connecting protrusion ring, the first sealing element can seal the assembly gap between the first ring portion and the first connecting protrusion ring by utilizing the sealing property of the first sealing element.

[0041] In some embodiments, one end of the current collection component along the first direction is connected to the heat exchange end via the flexible connection structure, and the other end of the current collection component along the first direction is rigidly connected to the heat exchange end.

[0042] In the above technical solution, by making one end of the current collector along the first direction connected to the heat exchange end through a flexible connection structure, and at the same time making the other end of the current collector along the first direction rigidly connected to the heat exchange end, the spacing between two adjacent heat exchange components along the first direction can be adjusted. At the same time, the overall structural rigidity and strength of the thermal management unit assembled by multiple current collectors and multiple heat exchange components through the flexible connection structure are better, thereby making the reliability and stability of the thermal management unit better.

[0043] In some embodiments, the heat exchange end includes an end body and a second connecting protrusion, the second connecting protrusion being disposed on one side of the end body along the first direction and surrounding the flow collecting component, and the end of the flow collecting component being inserted into the second connecting protrusion.

[0044] In the above technical solution, by setting the heat exchange end to include an end body and a second connecting protrusion ring disposed on one side of the end body along the first direction, when connecting the collector component and the rigid connection end of the heat exchange end, the end of the collector component can be inserted into the second connecting protrusion ring, making the connection operation between the collector component and the rigid connection end of the heat exchange end more convenient.

[0045] In some embodiments, the second connecting protrusion is welded to the current collecting component.

[0046] In the above technical solution, by welding the second connecting protrusion ring to the current collecting component, the connection between the second connecting protrusion ring and the current collecting component can be made more reliable and stable, which in turn makes the connection between the current collecting component and the rigid connection end of the heat exchange end more reliable and stable. Moreover, the weld formed by welding has a sealing effect on the assembly gap between the second connecting protrusion ring and the current collecting component.

[0047] In some embodiments, a second seal is provided between the outer peripheral wall of the current collection component and the inner peripheral wall of the second connecting protrusion ring.

[0048] In the above technical solution, by providing a second sealing element between the inner peripheral wall of the second connecting protrusion ring and the outer peripheral wall of the current collecting component, the second sealing element can seal the assembly gap between the second connecting protrusion ring and the current collecting component by utilizing the sealing property of the second sealing element.

[0049] In some embodiments, the current collector assembly has a current inlet and a current outlet, both of which are connected to the current collection channel. The current collector assembly includes two sets of current collector components, which are respectively disposed on both sides of the battery cell group along the second direction. Each set of current collector components includes a plurality of current collector components arranged along the first direction. The current collection channels of all current collector components in each set of current collector components are connected. One set of current collector components is provided with the current inlet, and the other set of current collector components is provided with the current outlet.

[0050] In the above technical solution, by setting the current collection assembly to include two sets of current collection components, and the two sets of current collection components are respectively arranged on both sides of the battery cell group along the second direction, the arrangement of the current collection assembly is convenient. This arrangement allows the heat exchange medium to flow into one set of current collection components through the current collection inlet and into the heat exchange channels of multiple heat exchange components. The heat exchange medium flowing through multiple heat exchange components flows into the other set of current collection components and flows out from the current collection outlet. This also makes the flow channel arrangement in the thermal management unit relatively simple.

[0051] In some embodiments, each group of battery cells includes a plurality of battery cells, and the plurality of battery cells in each group of battery cells are connected together as a whole.

[0052] In the above technical solution, by connecting multiple battery cells in each battery cell group into a whole, when inserting the battery cell group between two adjacent heat exchange components, the battery cell group can be connected into a whole first. In this way, the battery cell group can be inserted as a whole between the two heat exchange components, making the operation of inserting the battery cell group between two adjacent heat exchange components simpler and more convenient, and also improving assembly efficiency.

[0053] In some embodiments, each group of battery cells includes a plurality of battery cells, and the plurality of battery cells in each group of battery cells are arranged along the second direction.

[0054] In the above technical solution, by arranging multiple battery cells in the battery cell group along the second direction, each battery cell in the battery cell group can be thermally connected to the heat exchange components on both sides, so that the heat conduction area between each battery cell and the heat exchange component is large, which can better improve the temperature regulation efficiency of the battery cell.

[0055] In some embodiments, along the first direction, a thermally conductive adhesive layer is provided on the side of the heat exchange component facing the battery cell assembly; and / or, along the first direction, a thermally conductive adhesive layer is provided on the side of the battery cell assembly facing the heat exchange component.

[0056] In the above technical solution, by providing a thermally conductive adhesive layer on at least one side of the heat exchange component and / or battery cell assembly along the first direction, after inserting multiple battery cell assemblies into two adjacent heat exchange components, the thermal management unit and the multiple battery cell assemblies can be pressed together as a whole along the first direction, so that the battery cell assembly and the adjacent heat exchange component can be easily bonded and fixed into a whole by the thermally conductive adhesive layer.

[0057] Secondly, this application provides a method for assembling a battery device, wherein the battery device is a battery device according to the first aspect embodiment of this application described above, and the assembly method includes:

[0058] The heat exchange components and the flow collectors are assembled to form the thermal management unit;

[0059] The thermal management unit is stretched along the first direction;

[0060] Multiple sets of the battery cells are inserted between two adjacent heat exchange components along a third direction to form a semi-finished battery cell assembly, wherein the third direction, the second direction, and the first direction intersect each other;

[0061] Pressure is applied along the first direction to both sides of the semi-finished battery cell assembly to press and form the battery cell assembly.

[0062] The battery cell assembly is assembled into the housing.

[0063] In the above technical solution, during the assembly of battery cell modules, the thermal management unit can be assembled first. Since the spacing between two adjacent heat exchange components in the thermal management unit is adjustable along the first direction, the assembled thermal management unit can be stretched along the first direction, causing the flexible connection structure connecting the current collector and the heat exchange end to extend along the first direction, thereby increasing the spacing between two adjacent heat exchange components. This facilitates the insertion of multiple battery cell groups between two adjacent heat exchange components. Then, the thermal management unit and multiple battery cell groups are pressed together along the first direction, causing the flexible connection structure connecting the current collector and the heat exchange end to compress along the first direction, thereby reducing the spacing between two adjacent heat exchange components. This allows multiple heat exchange components and multiple battery cell modules to be assembled together through overall pressing. The assembly process is simple and convenient, which can improve the assembly efficiency of battery cell modules. The assembled battery cell modules can be placed into the box as a whole, thereby improving the assembly efficiency of the battery device and shortening the assembly time.

[0064] In some embodiments, inserting multiple sets of battery cell groups between two adjacent heat exchange components along a third direction includes: sequentially inserting multiple sets of battery cell groups between adjacent heat exchange components; or, inserting all battery cell groups together between two adjacent heat exchange components along the third direction.

[0065] In the above technical solution, by sequentially inserting multiple battery cell groups between adjacent heat exchange components or by inserting all battery cell groups together along a third direction between two adjacent heat exchange components, the initial assembly process of the battery cell group and the thermal management unit can be simplified and made easier to operate.

[0066] Thirdly, this application provides an electrical device, including: a battery device according to the first aspect embodiment of this application described above.

[0067] In the above technical solution, the electrical device is equipped with the aforementioned battery device, which has high temperature regulation efficiency and high assembly efficiency.

[0068] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0069] 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:

[0070] Figure 1 This is a perspective view of a battery device according to some embodiments of this application, wherein the first housing is removed;

[0071] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the battery cell assembly;

[0072] Figure 3 yes Figure 2 Enlarged view of point C in the middle;

[0073] Figure 4 yes Figure 2 A schematic diagram of the heat exchange end of the heat exchange component in the diagram;

[0074] Figure 5 yes Figure 2 A front view of the thermal management unit in the image, wherein the thermal management unit is stretched along a first direction;

[0075] Figure 6 It is along Figure 5 Cross-sectional view of the DD line;

[0076] Figure 7 yes Figure 6 Enlarged view at point E in the middle;

[0077] Figure 8 yes Figure 5 Side view of the thermal management unit in the middle;

[0078] Figure 9 yes Figure 2 A front view of the thermal management unit, wherein the thermal management unit is pressed together along a first direction;

[0079] Figure 10 It is along Figure 9 Cross-sectional view of the FF line;

[0080] Figure 11 yes Figure 10 Enlarged view of point G in the middle;

[0081] Figure 12 yes Figure 9 Side view of the thermal management unit in the middle;

[0082] Figure 13 These are comparative schematic diagrams of the thermal management unit of a battery device according to some embodiments of this application under different states, wherein a is a state diagram when the thermal management unit is stretched along the first direction, and b is a state diagram when the thermal management unit is pressed along the first direction;

[0083] Figure 14 This is a schematic diagram illustrating the insertion process of a battery cell pack between adjacent heat exchange components according to some embodiments of this application;

[0084] Figure 15 This is a schematic diagram illustrating the insertion process of a battery cell pack between adjacent heat exchange components according to other embodiments of this application;

[0085] Figure 16 This is a schematic diagram of the battery cell assembly into the housing according to some embodiments of this application;

[0086] Figure 17 This is a schematic diagram of an electrical device according to some embodiments of this application.

[0087] Figure label:

[0088] 1000. Electrical appliances;

[0089] 100. Battery assembly; 11. Housing; 101. Second housing;

[0090] 10. Battery cell modules;

[0091] 20. Thermal management unit; 201. Insertion space;

[0092] 30. Heat exchange component; 31. Heat exchange end; 311. Heat exchange interface; 312. End body; 313. First connecting protrusion ring; 314. Second connecting protrusion ring;

[0093] 40. Current collector assembly; 401. Current collector inlet; 402. Current collector outlet; 41. Current collector component; 410. Current collector channel; 411. Current collector tube body; 412. First connecting end; 413. Second connecting end; 414. Protrusion;

[0094] 50. Flexible connection structure; 51. Flexible connector; 511. First fixing part; 512. First annular cavity; 513. Second fixing part; 514. Second annular cavity; 515. Deformable part; 52. Connecting ring; 521. First ring part; 522. Second ring part; 531. First connection point; 532. Second connection point; 53. Floating gap; 54. Axial floating gap; 55. Radial floating gap;

[0095] 60. Battery cell pack; 61. Battery cell;

[0096] 200. Vehicle body. Detailed Implementation

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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 a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0101] 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.

[0102] 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 various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0103] In this application, "multiple" means two or more (including two).

[0104] In the embodiments of this application, unless otherwise specified, all implementation methods and optional implementation methods of this application can be combined with each other to form new technical solutions.

[0105] In the embodiments of this application, unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form new technical solutions.

[0106] In embodiments of this application, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via busbars. For example, a battery cell assembly is typically formed by arranging multiple battery cells; a battery cell assembly may also be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module may be formed by bundling multiple battery cells together with cable ties.

[0107] The battery device can be a battery pack, which includes a housing and one or more individual battery cells housed within the housing. The individual battery cells can be battery modules, which can be housed within the housing by securing the battery modules to the housing; alternatively, multiple individual battery cells can be directly secured to the housing.

[0108] In embodiments of this application, the housing may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing for housing individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or unsealed. The first housing may be a top cover or a bottom plate. For example, the housing may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, forming a closed space inside the housing for housing individual battery cells.

[0109] In embodiments of this application, the housing can be part of the vehicle's chassis structure. For example, a portion of the housing can be at least a part of the vehicle's floor, or a portion of the housing can be at least a part of the vehicle's crossbeams and longitudinal beams.

[0110] In this embodiment, the battery cell can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this embodiment is not limited to these types. The battery cell can be flat, cuboid, or other shapes, and this embodiment is not limited to these shapes either.

[0111] A battery cell, as the smallest energy unit of a battery device, includes a casing and electrode assemblies disposed within the casing. The electrode assemblies are the components within the battery cell where electrochemical reactions occur. The casing may contain one or more electrode assemblies. Electrode assemblies are mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode plates without active material each constitute a tab.

[0112] The positive electrode sheet may include a positive current collector and a positive electrode film layer disposed on at least one surface of the positive current collector, the positive electrode film layer including a positive electrode active material.

[0113] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive electrode film layer is disposed on either or both of the two opposite surfaces of the positive current collector.

[0114] As an example, the positive current collector can be a metal foil or a composite current collector.

[0115] The negative electrode sheet may include a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector, the negative electrode film layer including a negative electrode active material.

[0116] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode film layer is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0117] As an example, the negative electrode current collector can be made of metal foil, foam metal, or composite current collector.

[0118] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0119] In related technologies, a thermal management unit is installed within the battery device to regulate the temperature of individual battery cells. To increase the temperature regulation efficiency of the thermal management unit for individual battery cells, the thermal management unit is configured to include multiple heat exchange plates and multiple manifolds, with battery cell groups arranged between adjacent heat exchange plates to improve heat exchange efficiency, thereby enhancing the temperature regulation efficiency of the thermal management unit for individual battery cells.

[0120] However, due to the limitations of the battery device structure, the battery device assembly process requires first assembling a single heat exchange plate and a single battery cell group into a unit, then using tooling to install a single manifold to the end of the heat exchange plate, and then connecting another unit consisting of a single heat exchange plate and a single battery cell group, repeating this process to complete the installation of the battery cell group and thermal management unit at the module level. The assembly process is extremely cumbersome, takes a long time, and has low efficiency.

[0121] Therefore, optimizing the structure of battery devices to improve assembly efficiency is a technical problem that needs to be solved.

[0122] Based on this, this application provides a battery device, which includes a housing and a battery cell assembly. The battery cell assembly is disposed in the housing and includes a thermal management unit and multiple battery cell groups. Each battery cell group includes at least one battery cell. The thermal management unit includes a current collector assembly and multiple heat exchange components. The multiple heat exchange components are arranged at intervals along a first direction. A battery cell group is provided between every two adjacent heat exchange components. The battery cell group is thermally connected to the heat exchange components. The current collector assembly is located on at least one side of the battery cell group along a second direction and includes multiple current collector components. The second direction intersects the first direction.

[0123] The end of the heat exchange component along the second direction is the heat exchange end. The heat exchange ends of each two adjacent heat exchange components located at the same end in the second direction are connected by a flow collector. The heat exchange component has a heat exchange channel for the flow of the heat exchange medium, and the flow collector has a flow collection channel for the flow of the heat exchange medium. The heat exchange channel and the flow collection channel are connected. At least one end of the flow collector along the first direction is connected to the heat exchange end by a flexible connection structure, so that the distance between two adjacent heat exchange components is adjustable along the first direction. A floating gap is formed between the end of the flow collector connected to the heat exchange end by the flexible connection structure and the corresponding heat exchange end.

[0124] The aforementioned battery device, by configuring the thermal management unit to include a current collector and multiple heat exchange components, and the battery cell assembly to be positioned between two adjacent heat exchange components, allows both sides of each battery cell assembly to exchange heat with the heat exchange components, thereby improving the temperature regulation efficiency of the battery cells. The current collector is configured to include multiple current collectors, with each current collector connected between the heat exchange ends of two adjacent heat exchange components. By connecting at least one end of the current collector along a first direction to the heat exchange end through a flexible connection structure, the spacing between two adjacent heat exchange components is adjustable along the first direction. In this way, the thermal management unit can be assembled before the battery cell assembly is assembled.

[0125] Since the spacing between two adjacent heat exchange components in the thermal management unit is adjustable along the first direction, and a floating gap is formed between the end of the current collector and the heat exchange end connected by the flexible connection structure and the corresponding heat exchange end, the spacing between two adjacent heat exchange components along the first direction can be adjusted by adjusting the size of the floating gap during the assembly of the thermal management unit with multiple battery cell groups. The assembled thermal management unit can be stretched along a first direction, causing deformation of the flexible connection structure between the current collector and the heat exchange end. This allows the current collector to float along the first direction, increasing the size of the floating gap and thus the distance between adjacent heat exchange components. This facilitates the insertion of multiple battery cell groups between adjacent heat exchange components. Then, the thermal management unit and multiple battery cell groups are pressed together along the first direction, compressing the flexible connection structure between the current collector and the heat exchange end. This reduces the size of the floating gap and thus the distance between adjacent heat exchange components. This allows multiple heat exchange components and multiple battery cell assemblies to be assembled together, simplifying the assembly process and improving the assembly efficiency of battery cell assemblies. The assembled battery cell assemblies can then be placed into a casing, thereby improving the assembly efficiency of the battery device and shortening the assembly time.

[0126] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. Besides vehicles, the battery device can also be used in, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. 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.

[0127] The electrical devices disclosed in this application can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device is installed inside the vehicle, and the battery device can be located at the bottom, front, or rear of the vehicle. The battery device can be used to power the vehicle; for example, the battery device can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller is used to control the battery device to supply power to the motor, for example, for the vehicle's starting, navigation, and operating power needs. In some embodiments of this application, the battery device can not only serve as the vehicle's operating power source but also as the vehicle's drive power source, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle.

[0128] The following is for reference. Figures 1-13 A battery device 100 according to an embodiment of this application is described.

[0129] refer to Figures 1-4 In a first aspect, this application provides a battery device 100, including a housing 11 and a battery cell assembly 10. The battery cell assembly 10 is disposed within the housing 11 and includes a thermal management unit 20 and multiple battery cell groups 60. Each battery cell group 60 includes at least one battery cell 61. The thermal management unit 20 includes a current collector assembly and multiple heat exchange components 30. The multiple heat exchange components 30 are arranged at intervals along a first direction. A battery cell group 60 is provided between every two adjacent heat exchange components 30. The battery cell group 60 is thermally connected to the heat exchange component 30. The current collector assembly is located on at least one side of the battery cell group 60 along a second direction and includes multiple current collector components 41. The second direction intersects the first direction.

[0130] The end of the heat exchange component 30 along the second direction is the heat exchange end 31. Each pair of adjacent heat exchange components 30 located at the same end of the heat exchange end 31 in the second direction is connected by a flow collector 41. The heat exchange component 30 has a heat exchange channel for the flow of the heat exchange medium. The flow collector 41 has a flow collection channel 410 for the flow of the heat exchange medium. The heat exchange channel and the flow collection channel 410 are connected. At least one end of the flow collector 41 along the first direction is connected to the heat exchange end 31 by a flexible connection structure 50, so that the distance between two adjacent heat exchange components 30 is adjustable along the first direction. A floating gap 53 is formed between the end of the flow collector 41 connected to the heat exchange end 31 by the flexible connection structure 50 and the corresponding heat exchange end 31.

[0131] For example, the first direction can refer to direction e1 in the attached drawing, and the second direction can refer to direction e2 in the attached drawing. The first direction can be the length direction of the battery device 100, and the second direction can be the width direction of the battery device 100.

[0132] Each battery cell group 60 includes at least one battery cell 61, and may include the following situations: for example, each battery cell group 60 may include one battery cell 61; each battery cell group 60 may also include multiple battery cells 61.

[0133] The thermal management unit 20 is used to regulate the temperature of the battery cell 61. The thermal management unit 20 can increase or decrease the temperature of the battery cell 61. For example, when the ambient temperature is low, the thermal management unit 20 can increase the temperature of the battery cell 61; when the ambient temperature is high, the thermal management unit 20 can decrease the temperature of the battery cell 61, thus dissipating the heat generated by the battery cell 61 during operation and preventing the battery cell 61 from overheating.

[0134] At least the main body of the heat exchange component 30 may be a heat-conducting element. For example, the main body of the heat exchange component 30 may be a metal component, such as an aluminum, copper, or steel component. The main body of the heat exchange component 30 refers to the portion of the heat exchange component 30 located between adjacent battery cell groups 60.

[0135] For example, the heat exchange component 30 can be a plate-like structure, which can make the contact area between the heat exchange component 30 and the battery cell 61 larger.

[0136] For example, the battery cell 61 can be a square battery, and the large surface of the battery cell 61 can be thermally connected to the heat exchange component 30.

[0137] The current collector 41 can be a metal part, such as an aluminum, steel, or copper part. The current collector 41 can also be a non-metallic part, such as an engineering plastic part. The current collector 41 can be formed in a tubular shape and extend along the first direction. For example, the cross-section of the current collector 41 can be circular, and the cross-section of the current collector 41 is perpendicular to the first direction.

[0138] When the thermal management unit 20 is operating, the heat exchange medium can enter part of the collector channel 410 of the collector assembly. The heat exchange medium entering the collector channel 410 flows into the heat exchange channels of multiple heat exchange components 30. During the flow of the heat exchange medium through the heat exchange channels, it can exchange heat with the battery cells 61, thereby regulating the temperature of the battery cells 61. The heat exchange medium flowing through the heat exchange channels is collected into another part of the collector channel 410 of the collector assembly, and then discharged from the collector assembly.

[0139] The heat exchange medium can be a liquid, such as water or ethylene glycol.

[0140] The current collector assembly is located on at least one side of the battery cell pack 60 along the second direction, and may include the following situations: the entire current collector assembly is located on one side of the battery cell pack 60 along the second direction, in which case the heat exchange component 30 has a heat exchange end 31 at one end along the second direction, and a heat exchange inlet and a heat exchange outlet are formed on the heat exchange end 31 that are spaced apart from each other; or, a portion of the current collector assembly is located on one side of the battery cell pack 60 along the second direction, and the other portion of the current collector assembly is located on the other side of the battery cell pack 60 along the second direction, in which case the heat exchange component 30 has heat exchange ends 31 at both ends along the second direction, a heat exchange inlet is formed on the heat exchange end 31 at one end of the heat exchange component 30 along the second direction, and a heat exchange outlet is formed on the heat exchange end 31 at the other end of the heat exchange component 30 along the second direction. The heat exchange medium flows into the heat exchange channel within the heat exchange component 30 from the heat exchange inlet and flows out of the heat exchange component 30 from the heat exchange outlet.

[0141] At least one end of the collector 41 along the first direction is connected to the heat exchange end 31 via a flexible connection structure 50. This can include the following situations: For example, one end of the collector 41 along the first direction is connected to the heat exchange end 31 via a flexible connection structure 50, and the other end of the collector 41 along the first direction is rigidly connected to the heat exchange end 31, so that one end of the collector 41 along the first direction is flexibly connected to the heat exchange end 31 and the other end of the collector 41 along the first direction is rigidly connected to the heat exchange end 31; For example, both ends of the collector 41 along the first direction are connected to the heat exchange end 31 via a flexible connection structure 50, so that both ends of the collector 41 along the first direction are flexibly connected to the heat exchange end 31.

[0142] Since the flexible connection structure 50 can deform, the flow collector 41 can float along the first direction through the deformation of the flexible connection structure 50, thereby adjusting or changing the spacing between two adjacent heat exchange components 30.

[0143] It should be noted that the flexible connection structure 50 in this application refers to a flexible connection structure 50 in which at least a part is flexible. For example, a part of the flexible connection structure 50 may be flexible while another part of the flexible connection structure 50 is rigid; or the entire flexible connection structure 50 may be flexible.

[0144] In the above technical solution, by setting the thermal management unit 20 to include a current collector assembly and multiple heat exchange components 30, and the battery cell assembly 10 to be arranged between two adjacent heat exchange components 30, both sides of each battery cell assembly 60 can exchange heat with the heat exchange components 30, thereby improving the temperature regulation efficiency of the battery cell 61; by setting the current collector assembly to include multiple current collector components 41 and each current collector component 41 connected between the heat exchange ends 31 of two adjacent heat exchange components 30, and by connecting at least one end of the current collector component 41 along the first direction to the heat exchange ends 31 through a flexible connection structure 50, the spacing between two adjacent heat exchange components 30 can be adjusted along the first direction, so that the thermal management unit 20 can be assembled first during the assembly of the battery cell assembly 10.

[0145] Since the spacing between two adjacent heat exchange components 30 in the thermal management unit 20 is adjustable along the first direction, and a floating gap 53 is formed between the end of the current collector 41 connected to the heat exchange end 31 through the flexible connection structure 50 and the corresponding heat exchange end 31, the spacing between two adjacent heat exchange components 30 along the first direction can be adjusted by adjusting the size of the floating gap 53 during the assembly of the thermal management unit 20 with multiple battery cell groups 60. The assembled thermal management unit 20 can be stretched along the first direction, causing the flexible connection structure 50 connecting the current collector 41 and the heat exchange end 31 to deform. This allows the current collector 41 to float relative to the heat exchange end 31 along the first direction, increasing the size of the floating gap 53 in the first direction. This increases the distance between two adjacent heat exchange components 30, facilitating the insertion of multiple battery cell groups 60 between adjacent heat exchange components 30. Then, the thermal management unit 20 and the multiple battery cell groups 60 can be assembled as a whole along the first direction. Pressing compresses the flexible connection structure 50 connecting the current collector 41 and the heat exchange end 31 along the first direction, thereby reducing the size of the floating gap 53 in the first direction. This reduces the distance between two adjacent heat exchange components 30, allowing multiple heat exchange components 30 and multiple battery cell assemblies 10 to be assembled together. The assembly process is simple and convenient, which improves the assembly efficiency of the battery cell assemblies 10. The assembled battery cell assemblies 10 can be placed into the box as a whole, thereby improving the assembly efficiency of the battery device 100 and shortening the assembly time.

[0146] In some embodiments, refer to Figures 5-7The flexible connection structure 50 includes a flexible connector 51, which includes a first fixing part 511, a second fixing part 513, and a deformable part 515. The deformable part 515 is connected between the first fixing part 511 and the second fixing part 513. The first fixing part 511 is connected to the current collection component 41, and the second fixing part 513 is connected to the heat exchange end 31. The deformable part 515 can deform at least in a first direction.

[0147] The first fixing part 511 is connected to the current collecting component 41, for example, the first fixing part 511 is bonded to the current collecting component 41 or hot-pressed, or the first fixing part 511 is integrally injection molded onto the current collecting component 41.

[0148] The second fixing part 513 is connected to the heat exchange end 31, for example, by bonding or hot-pressing the second fixing part 513 to the heat exchange end 31, or by integrally injection molding the second fixing part 513 onto the heat exchange end 31.

[0149] The deformable part 515 can deform at least in the first direction. It can be that the deformable part 515 can deform in the first direction, or it can deform in the first direction and can also deform in other directions different from the first direction.

[0150] For example, refer to Figures 5-8 When the thermal management unit 20 is stretched along the first direction, the deformation part 515 deforms, the collector 41 floats relative to the heat exchange component 30 along the first direction, and the distance between two adjacent heat exchange components 30 increases. For example, the distance between two adjacent heat exchange components 30 is d1 at this time.

[0151] For example, refer to Figures 9-12 When the thermal management unit 20 is pressed against the battery cell assembly 10 along the first direction, the deformation part 515 deforms, the current collector 41 floats relative to the heat exchange component 30 along the first direction, and the distance between two adjacent heat exchange components 30 decreases. For example, at this time, the distance between two adjacent heat exchange components 30 is d2, d2 < d1.

[0152] Among them, the flexible connector 51 can be a one-piece molded part, for example, the flexible connector 51 can be a one-piece injection molded part.

[0153] In the above technical solution, by making the flexible connection structure 50 include a flexible connector 51, and the flexible connector 51 includes a first fixing part 511, a second fixing part 513, and a deformable part 515, wherein the first fixing part 511 and the second fixing part 513 are respectively connected to the collector 41 and the heat exchange end 31, it is convenient to fix the flexible connector 51. Furthermore, by making the deformable part 515 deformable at least along the first direction, the heat management unit 20 can be stretched or compressed along the first direction to deform the deformable part 515, thereby changing the size of the deformable part 515 along the first direction. This allows the spacing between two adjacent heat exchange components 30 along the first direction to be adjustable.

[0154] In some embodiments, refer to Figures 5-8 The deformable part 515 can deform along the radial direction of the current collecting member 41, and the radial direction of the current collecting member 41 is perpendicular to the first direction.

[0155] In the above technical solution, the deformable part 515 can deform along the first direction to make the spacing between two adjacent heat exchange components 30 adjustable along the first direction. The deformable part 515 can also deform radially along the current collector 41. When assembling multiple heat exchange components 30 and multiple current collectors 41, the radial assembly tolerance of the current collector 41 can be absorbed by the radial deformation of the deformable part 515 along the current collector 41. This allows multiple current collectors 41 located on the same side of the battery cell group 60 in the second direction to be coaxially arranged, reducing the dimensional accuracy requirements and facilitating installation.

[0156] In some embodiments, the flexible connector 51 is a soft rubber component.

[0157] For example, the flexible connector 51 can be a plastic part, a rubber part, or a silicone part.

[0158] In the above technical solution, by setting the flexible connector 51 as a soft rubber part, the flexible connector 51 can have better flexibility and deformation ability; in addition, the flexible connector 51 can also play a better sealing role in the assembly between the collector 41 and the heat exchange end 31.

[0159] In some embodiments, at least a portion of the flexible connector 51 is integrally injection molded onto the manifold 41.

[0160] At least a portion of the flexible connector 51 is integrally injection molded into the current collector 41. This can be either a portion of the flexible connector 51 being integrally injection molded into the current collector 41, or the entire flexible connector 51 being integrally injection molded into the current collector 41.

[0161] In the above technical solution, by integrally injection molding at least a portion of the flexible connector 51 onto the current collector 41, the assembly process between the flexible connector 51 and the current collector 41 can be eliminated, further improving the assembly efficiency of the battery device 100; the assembly gap between the flexible connector 51 and the current collector 41 is also reduced or avoided, further improving the sealing performance between the flexible connector 51 and the current collector 41; in addition, the connection between the flexible connector 51 and the current collector 41 can be made more reliable.

[0162] In some embodiments, the first fixing part 511, the second fixing part 513, and the deformation part 515 are all annular structures arranged around the current collecting member 41.

[0163] For example, the cross-section of the current collecting component 41 is circular, the first fixing part 511 can be an annular ring surrounding the current collecting component 41, the second fixing part 513 can be an annular ring surrounding the current collecting component 41, and the deformation part 515 can be an annular ring surrounding the current collecting component 41.

[0164] In the above technical solution, by setting both the first fixing part 511 and the second fixing part 513 as annular structures surrounding the flow collecting component 41, the connection area between the first fixing part 511 and the flow collecting component 41 and between the second fixing part 513 and the heat exchange end 31 can be increased, thereby improving the stability and reliability of the connection between the flexible connector 51 and the flow collecting component 41 and the heat exchange end 31. At the same time, by setting the deformable part 515 as annular structure surrounding the flow collecting component 41, the connection between the flow collecting component 41 and the heat exchange end 31 can be made more stable and reliable, which is also conducive to further improving the sealing effect of the flexible connection structure 50 between the flow collecting component 41 and the heat exchange end 31.

[0165] In some embodiments, refer to Figures 9-12 The connection between the deformable part 515 and the first fixing part 511 is the first connection 531, and the connection between the deformable part 515 and the second fixing part 513 is the second connection 532. The direction from the first connection 531 to the second connection 532 is the extension direction of the deformable part 515. The extension direction of the deformable part 515 has an angle with the first direction and the radial direction of the current collecting member 41.

[0166] For example, refer to Figure 11 The angle between the extension direction of the deformable part 515 and the first direction is α1, and the angle between the extension direction of the deformable part 515 and the radial direction of the current collecting component 41 is α2. Both α1 and α2 are greater than 0, and α1 can be less than α2. The sum of α1 and α2 is 90°. For example, the value of α1 can be in the range of 5° to 30°, such as 10°, 12°, 15°, 17°, 20°, 22°, 25°, etc.

[0167] In the above technical solution, by making the extension direction of the deformable part 515 form an angle with both the first direction and the radial direction of the heat collection component 41, the deformable part 515 is inclined. This facilitates the deformation of the deformable part 515 during the stretching or compression of the heat management unit 20 along the first direction. It also allows the deformable part 515 to have deformation in both the first direction and the radial direction of the heat collection component 41, which facilitates the adjustment of the spacing between two adjacent heat exchange components 30 along the first direction. Furthermore, it can absorb the radial assembly tolerance of the heat collection component 41, reduce the dimensional accuracy requirements, and facilitate installation.

[0168] In some embodiments, refer to Figures 5-8 The floating gap 53 includes an axial floating gap 54. The heat exchange end 31 includes an end body 312 and a first connecting protrusion 313. The first connecting protrusion 313 is disposed on at least one side of the end body 312 along the first direction and surrounds the flow collecting component 41. The second fixing part 513 is connected to the first connecting protrusion 313. At least one end of the flow collecting component 41 along the first direction is spaced apart from the end body 312 in the first direction to form an axial floating gap 54.

[0169] The aforementioned end body 312 may be provided with the aforementioned heat exchange interface 311.

[0170] For example, when one end of the collector component 41 along the first direction is connected to the heat exchange end 31 through a flexible connection structure 50, the first connecting protrusion ring 313 is provided on one side of the end body 312 along the first direction; when both ends of the collector component 41 along the first direction are connected to the heat exchange end 31 through flexible connection structures 50 respectively, the first connecting protrusion ring 313 is provided on both sides of the end body 312 along the first direction.

[0171] The fact that at least one end of the collector component 41 is spaced apart from the end body 312 in the first direction means that the end of the collector component 41 that is flexibly connected to the heat exchange end 31 is spaced apart from the end body 312 in the first direction. For example, when one end of the collector component 41 in the first direction is connected to the heat exchange end 31 through a flexible connection structure 50, the end of the collector component 41 that is flexibly connected to the heat exchange end 31 is spaced apart from the end body 312 in the first direction, so as to form an axial floating gap 54 on one side of the collector component 41 in the first direction; when both ends of the collector component 41 in the first direction are connected to the heat exchange end 31 through flexible connection structures 50 respectively, both ends of the collector component 41 in the first direction are spaced apart from the end body 312 in the first direction, so as to form axial floating gaps 54 on both sides of the collector component 41 in the first direction respectively.

[0172] When the thermal management unit 20 is stretched along the first direction, the collector 41 floats relative to the heat exchange component 30 along the first direction, thereby increasing the axial floating gap 54 and thus increasing the distance between adjacent heat exchange components 30 along the first direction; when the thermal management unit 20 is pressed along the first direction, the collector 41 floats relative to the heat exchange component 30 along the first direction, thereby decreasing the axial floating gap 54 and thus decreasing the distance between adjacent heat exchange components 30 along the first direction.

[0173] In the above technical solution, by setting the heat exchange end 31 to include an end body 312 and a first connecting protrusion ring 313 protruding from at least one side of the end body 312 along the first direction, and the second fixing part 513 is connected to the first connecting protrusion ring 313, the connection and assembly between the collector component 41 and the heat exchange end 31 is facilitated, and the stability of the connection and assembly of the two can be enhanced. Furthermore, by making at least one end of the collector component 41 along the first direction spaced apart from the end body 312 in the first direction to form an axial floating gap 54, a floating space can be provided for the floating of the collector component 41 in the first direction. By stretching or compressing the thermal management unit 20, the deformation part 515 of the flexible connector 51 is deformed, thereby changing the size of the axial floating gap 54 in the first direction, and thus the spacing between two adjacent heat exchange components 30 can be easily adjusted.

[0174] In some embodiments, refer to Figures 5-8 The floating gap 53 includes a radial floating gap 55. The first connecting protrusion 313 and the current collecting component 41 are spaced apart in the radial direction of the current collecting component 41 to form a radial floating gap 55.

[0175] The aforementioned radial floating gap 55 can be formed into an annular shape, and the radial floating gap 55 can be arranged around the outer periphery of the current collecting component 41.

[0176] In the above technical solution, based on the fact that at least one end of the heat exchanger 41 is spaced apart from the end body 312 in the first direction to form an axial floating gap 54, thereby allowing adjustment of the distance between two adjacent heat exchanger components 30, the first connecting protrusion 313 is further spaced apart from the heat exchanger 41 in the radial direction to form a radial floating gap 55. This provides floating space for the heat exchanger 41 to float in the radial direction, can absorb the radial assembly tolerance of the heat exchanger 41, reduce dimensional accuracy requirements, and facilitate installation.

[0177] In some embodiments, refer to Figures 5-8The first connecting protrusion 313 surrounds the outer periphery of the current collecting component 41. In the first direction, the deformable part 515 is connected to the side of the first fixing part 511 along the first direction and away from the end body 312. The second fixing part 513 is located on the outer periphery of the deformable part 515.

[0178] In the above technical solution, by having the first connecting protrusion 313 surround the outer periphery of the collecting component 41, at least one end of the collecting component 41 along the first direction can be inserted into the first connecting protrusion 313, facilitating the connection and assembly of the collecting component 41 and the heat exchange component 30; the deformable part 515 is connected to the side of the first fixing part 511 along the first direction and away from the end body 312, and the second fixing part 513 is located on the outer periphery of the deformable part 515, thus forming a space for the deformable part 515 to deform between the outer periphery of the collecting component 41 and the inner periphery of the first connecting protrusion 313; and this not only enables a flexible connection between at least one end of the collecting component 41 along the first direction and the heat exchange end 31, but also allows the flexible connector 51 to act as a sealing element, better sealing the assembly gap between at least one end of the collecting component 41 and the heat exchange end 31.

[0179] In some embodiments, refer to Figures 5-8 The current collecting component 41 includes a current collecting tube body 411 and a protrusion 414. The protrusion 414 is connected to at least one end of the current collecting tube body 411 along a first direction and is arranged around the current collecting tube body 411. The protrusion 414 protrudes from the current collecting tube body 411 along the first direction. A first annular cavity 512 is formed in the first fixing part 511 and is arranged around the current collecting tube body 411. The protrusion 414 is accommodated in the first annular cavity 512. An axial floating gap 54 is formed between the first fixing part 511 and the end body 312 in the first direction.

[0180] The protrusion 414 is arranged in a ring around the manifold body 411.

[0181] For example, the current collector 41 can be a one-piece molded part.

[0182] For example, when one end of the collector component 41 along the first direction is connected to the heat exchange end 31 through a flexible connection structure 50, the end of the collector tube 411 that is flexibly connected to the heat exchange end 31 is provided with the above-mentioned protrusion 414; when both ends of the collector component 41 along the first direction are connected to the heat exchange end 31 through flexible connection structures 50 respectively, both ends of the collector tube 411 along the first direction are provided with the above-mentioned protrusion 414.

[0183] In the above technical solution, by configuring the collector component 41 to include a collector tube body 411 and a protrusion 414 disposed at at least one end of the collector tube body 411 along the first direction, the first fixing part 511 covers the outside of the protrusion 414, which can increase the connection and fixing area between the flexible connector 51 and the collector component 41, and improve the reliability and stability of the connection between the flexible connector 51 and the collector component 41; and by forming an axial floating gap 54 between the first fixing part 511 and the end body 312 in the first direction, a floating space can be provided for the floating of the collector component 41 in the first direction. By stretching or compressing the heat management unit 20 along the first direction, the deformable part 515 of the flexible connector 51 is deformed, thereby changing the size of the axial floating gap 54 in the first direction, and thus conveniently adjusting the distance between two adjacent heat exchange components 30.

[0184] In some embodiments, refer to Figures 5-8 The protrusion 414 protrudes radially from the outer circumferential surface of the manifold 411.

[0185] In the above technical solution, while the protrusion 414 protrudes from the manifold 411 in the first direction, the protrusion 414 also protrudes from the outer circumferential surface of the manifold 411 in the radial direction. This can further increase the connection and fixing area between the flexible connector 51 and the manifold 41, further improve the reliability and stability of the connection between the flexible connector 51 and the manifold 41, and also improve the sealing performance of the connection between the flexible connector 51 and the manifold 41.

[0186] In some embodiments, refer to Figures 5-8 The flexible connection structure 50 also includes a connecting ring 52. The hardness of the connecting ring 52 is greater than that of the flexible connector 51. The connecting ring 52 includes a first ring portion 521 and a second ring portion 522. The first ring portion 521 surrounds the outer periphery of the first connecting protrusion 313 and is sealed to the first connecting protrusion 313. The second ring portion 522 is connected to the side of the first ring portion 521 along the first direction and away from the end body 312. The second ring portion 522 surrounds the outer periphery of the current collecting component 41 and is spaced apart from the current collecting component 41 in the radial direction of the current collecting component 41. The second fixing portion 513 is connected to the second ring portion 522.

[0187] For example, the connecting ring 52 can be a metal part, a plastic part, or a composite material part.

[0188] In the above technical solution, by making the flexible connection structure 50 further include a connecting ring 52 with a relatively larger hardness than the flexible connector 51, by making the first ring portion 521 of the connecting ring 52 surround and connect to the first connecting protrusion 313, and the second ring portion 522 surround the outer periphery of the collector component 41 and connect to the second fixing portion 513, when the flexible connection structure 50 is connected to the heat exchange end 31, the first connecting protrusion 313 of the heat exchange end 31 is inserted into the connecting ring 52 of the flexible connection structure 50 and fixedly connected to the first ring portion 521 of the connecting ring 52, making the connection operation between the flexible connection structure 50 and the heat exchange end 31 more convenient; by making the second ring portion 522 and the collector component 41 spaced apart in the radial direction of the collector component 41, there is a receiving space for accommodating the deformable portion 515 between the inner periphery of the second ring portion 522 and the outer periphery of the collector component 41, and the deformable portion 515 has sufficient deformation space in the receiving space, thereby making it easy to adjust the spacing between two adjacent heat exchange components 30 along the first direction.

[0189] In some embodiments, refer to Figures 5-8 A second annular cavity 514 is formed in the second fixing part 513, which surrounds the current collecting member 41, and the second ring part 522 is accommodated in the second annular cavity 514.

[0190] For example, the second ring 522 can be formed as a bent structure, which can further enhance the reliability and stability of the connection between the flexible connector 51 and the connecting ring 52.

[0191] In the above technical solution, by having the second fixing part 513 cover the second ring part 522, the connection and fixing area between the flexible connector 51 and the connecting ring 52 can be increased, thereby improving the reliability and stability of the connection between the flexible connector 51 and the connecting ring 52.

[0192] In some embodiments, the second fixing part 513 is integrally injection molded onto the connecting ring 52.

[0193] In the above technical solution, by integrally injection molding the second fixing part 513 onto the connecting ring 52, the assembly process between the flexible connector 51 and the connecting ring 52 can be eliminated, further improving the assembly efficiency of the battery device 100; it also reduces or avoids the assembly gap between the flexible connector 51 and the connecting ring 52, further improving the sealing performance between the flexible connector 51 and the connecting ring 52; in addition, it can make the connection between the flexible connector 51 and the connecting ring 52 more reliable.

[0194] In some embodiments, the first ring portion 521 is welded to the first connecting protrusion ring 313.

[0195] In the above technical solution, by welding the first ring portion 521 to the first connecting protrusion ring 313, the connection between the connecting ring 52 and the first connecting protrusion ring 313 can be made more reliable and stable, which in turn makes the connection between the flexible connection structure 50 and the heat exchange end 31 more reliable and stable. Moreover, the weld formed by welding has a sealing effect on the assembly gap between the first ring portion 521 and the first connecting protrusion ring 313.

[0196] In some embodiments, a first seal is provided between the inner peripheral wall of the first ring portion 521 and the outer peripheral wall of the first connecting protrusion ring 313.

[0197] For example, the first seal can be a sealing ring or a sealant. When the first seal is a sealant, it not only seals the assembly gap between the first ring portion 521 and the first connecting protrusion 313, but also connects and fixes the connecting ring 52 and the first connecting protrusion 313.

[0198] In the above technical solution, by providing a first sealing element between the inner peripheral wall of the first ring portion 521 and the outer peripheral wall of the first connecting protrusion ring 313, the first sealing element can seal the assembly gap between the first ring portion 521 and the first connecting protrusion ring 313 by utilizing the sealing property of the first sealing element.

[0199] In some embodiments, one end of the collector 41 along the first direction is connected to the heat exchange end 31 via a flexible connection structure 50, and the other end of the collector 41 along the first direction is rigidly connected to the heat exchange end 31.

[0200] In the above technical solution, by connecting one end of the current collector 41 along the first direction to the heat exchange end 31 through a flexible connection structure 50 and simultaneously connecting the other end of the current collector 41 along the first direction to the heat exchange end 31 rigidly, the spacing between two adjacent heat exchange components 30 along the first direction can be adjusted. At the same time, the overall structural rigidity and strength of the thermal management unit 20 assembled by multiple current collectors 41 and multiple heat exchange components 30 through the flexible connection structure 50 are better, thereby making the thermal management unit 20 more reliable and stable.

[0201] In some embodiments, refer to Figures 5-8 The heat exchange end 31 includes an end body 312 and a second connecting protrusion 314. The second connecting protrusion 314 is disposed on one side of the end body 312 along the first direction and surrounds the collector 41. The end of the collector 41 is inserted into the second connecting protrusion 314.

[0202] In the above technical solution, by setting the heat exchange end 31 to include an end body 312 and a second connecting protrusion 314 disposed on one side of the end body 312 along the first direction, when connecting the collector 41 and the rigid connection end of the heat exchange end 31, the end of the collector 41 can be inserted into the second connecting protrusion 314, making the connection operation between the collector 41 and the rigid connection end of the heat exchange end 31 more convenient.

[0203] In some embodiments, the second connecting protrusion 314 is welded to the current collecting component 41.

[0204] In the above technical solution, by welding the second connecting protrusion 314 to the current collecting component 41, the connection between the second connecting protrusion 314 and the current collecting component 41 can be made more reliable and stable, which in turn makes the connection between the current collecting component 41 and the rigid connection end of the heat exchange end 31 more reliable and stable, and the weld formed by welding has a sealing effect on the assembly gap between the second connecting protrusion 314 and the current collecting component 41.

[0205] In some embodiments, a second seal is provided between the outer peripheral wall of the current collecting component 41 and the inner peripheral wall of the second connecting protrusion 314.

[0206] For example, the second seal can be a sealing ring or a sealant. When the second seal is a sealant, it not only seals the assembly gap between the second connecting protrusion 314 and the current collecting component 41, but also connects and fixes the second connecting protrusion 314 and the current collecting component 41.

[0207] In the above technical solution, by providing a second sealing element between the inner peripheral wall of the second connecting protrusion 314 and the outer peripheral wall of the current collecting component 41, the second sealing element can seal the assembly gap between the second connecting protrusion 314 and the current collecting component 41 by utilizing the sealing property of the second sealing element.

[0208] In some embodiments, refer to Figures 2-5 The current collector assembly has a current inlet 401 and a current outlet 402. Both the current inlet 401 and the current outlet 402 are connected to the current collection channel 410. The current collector assembly includes two sets of current collector components 40. The two sets of current collector components 40 are respectively arranged on both sides of the battery cell group 60 along the second direction. Each set of current collector components 40 includes multiple current collector components 41 arranged along the first direction. The current collection channels 410 of all current collector components 41 in each set of current collector components 40 are connected. One set of current collector components 40 is provided with a current inlet 401, and the other set of current collector components 40 is provided with a current outlet 402.

[0209] When the thermal management unit 20 is operating, the heat exchange medium can enter the collector channel 410 of the collector assembly from the collector inlet 401. The heat exchange medium entering the collector channel 410 flows into the heat exchange channels of multiple heat exchange components 30. During the flow of the heat exchange medium through the heat exchange channels, it can exchange heat with the battery cells 61, thereby regulating the temperature of the battery cells 61. The heat exchange medium flowing through the heat exchange channels is collected in the collector channel 410 of the collector assembly and discharged from the collector outlet 402.

[0210] For example, the flow collection assembly may include two sets of flow collection component groups 40, one of which has a flow collection inlet 401 and the other has a flow collection outlet 402. Each set of flow collection component groups 40 includes a plurality of flow collection components 41 arranged along a first direction, and the flow collection channels 410 of the plurality of flow collection components 41 in each set of flow collection component groups 40 are all connected. Each heat exchange component 30 has two heat exchange interfaces 311, which may be located at the heat exchange end 31 of the heat exchange component 30. One heat exchange interface 311 is a heat exchange inlet and the other heat exchange interface 311 is a heat exchange outlet. The heat exchange medium flows into the heat exchange channel from the heat exchange inlet and flows out from the heat exchange outlet. The two sets of current collectors 40 are located on both sides of the battery cell group 60 along the second direction. At this time, the heat exchange component 30 has heat exchange ends 31 at both ends along the second direction. A heat exchange inlet is formed on the heat exchange end 31 at one end of the heat exchange component 30 along the second direction, and a heat exchange outlet is formed on the heat exchange end 31 at the other end of the heat exchange component 30 along the second direction.

[0211] The heat exchange channel within the heat exchange component 30 connects the heat exchange inlet and the heat exchange outlet, and the collection channel 410 within the collection component 41 connects to the heat exchange channel via the heat exchange interface 311. For example, the collection channel 410 of a collection component group 40 with a collection inlet 401 connects to the heat exchange channel via the heat exchange inlet, and the collection channels 410 of two adjacent collection components 41 connect via the heat exchange inlet on the heat exchange end 31; the collection channel 410 of a collection component group 40 with a collection outlet 402 connects to the heat exchange channel via the heat exchange outlet, and the collection channels 410 of two adjacent collection components 41 connect via the heat exchange outlet on the heat exchange end 31. Thus, when the thermal management unit 20 is operating, the heat exchange medium enters one of the collection component groups 40 from the collection inlet 401, then flows into the heat exchange channels of multiple heat exchange components 30, flows through multiple heat exchange components 30, flows into another collection component group 40, and then flows out from the collection outlet 402.

[0212] In the above technical solution, by setting the current collection assembly to include two sets of current collection component groups 40, and the two sets of current collection component groups 40 are respectively arranged on both sides of the battery cell group 60 along the second direction, the arrangement of the current collection assembly is convenient. This arrangement allows the heat exchange medium to flow into one set of current collection component groups 40 through the current collection inlet 401 and into the heat exchange channels of multiple heat exchange components 30. The heat exchange medium flowing through the multiple heat exchange components 30 flows into the other set of current collection component groups 40 and flows out from the current collection outlet 402. This also makes the flow channel arrangement in the thermal management unit 20 relatively simple.

[0213] In some embodiments, refer to Figure 2 Each battery cell group 60 includes multiple battery cells 61, and the multiple battery cells 61 in each battery cell group 60 are connected to form a whole.

[0214] For example, multiple battery cells 61 in each battery cell group 60 can be fixed together as a whole by adhesive.

[0215] In the above technical solution, by connecting multiple battery cells 61 in each battery cell group 60 into a whole, when inserting the battery cell group 60 between two adjacent heat exchange components 30, the battery cell group 60 can be connected into a whole first. In this way, the battery cell group 60 can be inserted as a whole between the two heat exchange components 30, making the operation of inserting the battery cell group 60 between two adjacent heat exchange components 30 simpler and more convenient, and also improving assembly efficiency.

[0216] In some embodiments, refer to Figure 2 Each battery cell group 60 includes multiple battery cells 61, and the multiple battery cells 61 in each battery cell group 60 are arranged along the second direction.

[0217] In the above technical solution, by arranging multiple battery cells 61 in the battery cell group 60 along the second direction, each battery cell 61 in the battery cell group 60 can be thermally connected to the heat exchange components 30 on both sides, so that the heat conduction area between each battery cell 61 and the heat exchange component 30 is large, which can better improve the temperature regulation efficiency of the battery cell 61.

[0218] In some embodiments, a thermally conductive adhesive layer is provided on the side of the heat exchange component 30 facing the battery cell assembly 60 along a first direction; and / or, a thermally conductive adhesive layer is provided on the side of the battery cell assembly 60 facing the heat exchange component 30 along a first direction.

[0219] For example, along the first direction, a thermally conductive adhesive layer is provided on the side of the heat exchange component 30 facing the battery cell assembly 60; as another example, along the first direction, a thermally conductive adhesive layer is provided on the side of the battery cell assembly 60 facing the heat exchange component 30; yet another example, along the first direction, a thermally conductive adhesive layer is provided on both the side of the heat exchange component 30 facing the battery cell assembly 60 and the side of the battery cell assembly 60 facing the heat exchange component 30.

[0220] In the above technical solution, by providing a thermally conductive adhesive layer on at least one side of the heat exchange component 30 and / or the battery cell assembly 10 along the first direction, after inserting multiple battery cell assemblies 60 into two adjacent heat exchange components 30, the thermal management unit 20 and the multiple battery cell assemblies 60 can be pressed together as a whole along the first direction, so that the battery cell assembly 60 and the adjacent heat exchange component 30 can be easily bonded and fixed into a whole by the thermally conductive adhesive layer.

[0221] Reference Figures 13-16 Secondly, this application provides a method for assembling a battery device 100, wherein the battery device 100 is the battery device 100 according to the first aspect embodiment of this application described above, and the assembly method includes:

[0222] Multiple heat exchange components 30 and multiple flow collectors 41 are assembled to form a thermal management unit 20;

[0223] The thermal management unit 20 is stretched along the first direction;

[0224] Multiple sets of battery cells 60 are inserted between two adjacent heat exchange components 30 along a third direction to form a semi-finished battery cell assembly 10, where the third direction, the second direction, and the first direction intersect each other.

[0225] Apply pressure along the first direction to both sides of the semi-finished battery cell assembly 10 to press and form the battery cell assembly 10.

[0226] The battery cell assembly 10 is assembled into the housing 11.

[0227] The third direction can be vertical or horizontal. For example, the third direction can refer to direction e3 in the attached diagram.

[0228] For example, refer to Figures 13-16A stretching fixture can be used to stretch the thermal management unit 20 from both sides along the first direction. After stretching the thermal management unit 20 along the first direction, the spacing d1 between adjacent heat exchange components 30 can be made greater than the thickness t of the battery cell assembly 60 in the first direction. Before pressing the semi-finished battery cell assembly 10, there is a gap between the battery cell assembly 60 and the heat exchange component 30. This avoids contact between the battery cell assembly 60 and two adjacent heat exchange components 30 when inserting them into each other, thus preventing them from affecting the insertion efficiency.

[0229] For example, refer to Figures 13-16 A pressing fixture can be used to apply pressure along the first direction to both sides of the semi-finished battery cell assembly 10 to form the battery cell assembly 10. During the pressing process of applying pressure along the first direction to both sides of the semi-finished battery cell assembly 10, the thermally conductive adhesive layer on the battery cell 61 and / or the thermally conductive adhesive layer on the heat exchange component 30 bonds and fixes the adjacent battery cell assembly 60 and heat exchange component 30 into a whole.

[0230] For example, before inserting the battery cell assembly 60 between two adjacent heat exchange components 30, multiple battery cells 61 in the battery cell assembly 60 can be connected as a whole, and the battery cell assembly 60 can be inserted as a whole between two adjacent heat exchange components 30.

[0231] For example, the housing 11 includes a first housing and a second housing 101. The first housing is placed on the upper side of the second housing 101. When the battery cell assembly 10 is assembled into the housing 11, the battery cell assembly 10 is hoisted into the second housing 101. After the installation is completed, the first housing is placed on top of the second housing 101.

[0232] In the above technical solution, during the assembly of the battery cell assembly 10, the thermal management unit 20 can be assembled first. Since the spacing between two adjacent heat exchange components 30 in the thermal management unit 20 is adjustable along the first direction, the assembled thermal management unit 20 can be stretched along the first direction first, causing the flexible connection structure 50 connecting the current collector 41 and the heat exchange end 31 to extend along the first direction, thereby increasing the spacing between two adjacent heat exchange components 30. This facilitates the insertion of multiple battery cell groups 60 between two adjacent heat exchange components 30, and then the thermal management unit is assembled. The 20 and multiple battery cell groups 60 are integrally pressed together along the first direction, so that the flexible connection structure 50 connecting the current collector 41 and the heat exchange end 31 is compressed along the first direction, thereby reducing the distance between two adjacent heat exchange components 30. This allows multiple heat exchange components 30 and multiple battery cell groups 10 to be integrally pressed together, simplifying the assembly process and making assembly convenient. This improves the grouping efficiency of the battery cell groups 10. The assembled battery cell groups 10 can be placed into the box as a whole, thereby improving the assembly efficiency of the battery device 100 and shortening the assembly time.

[0233] In some embodiments, refer to Figure 14 Inserting multiple sets of battery cells 60 into the space between two adjacent heat exchange components 30 along a third direction, including: sequentially inserting multiple sets of battery cells 60 into the space between adjacent heat exchange components 30.

[0234] For example, multiple heat exchange components 30 define multiple insertion spaces 201, and multiple battery cell groups 60 are respectively accommodated in the multiple insertion spaces 201. The multiple insertion spaces 201 are designated as first insertion space 201, second insertion space 201, third insertion space 201, fourth insertion space 201, ... Nth insertion space 201 along the first direction; the multiple battery cell groups 60 are arranged sequentially along the first direction as first battery cell group 60, second battery cell group 60, third battery cell group 60, fourth battery cell group 60, ... Nth battery cell group 60. During assembly, the first battery cell group 60 can be inserted into the first insertion space 201 along the third direction first, then the second battery cell group 60 can be inserted into the second insertion space 201 along the third direction, and then the third to Nth battery cell groups 60 can be inserted into the third to Nth insertion spaces 201 in sequence.

[0235] In the above technical solution, by sequentially inserting multiple battery cell groups 60 between adjacent heat exchange components 30, the initial assembly process of the battery cell group 60 and the thermal management unit 20 can be simplified and the operation is convenient.

[0236] In some embodiments, refer to Figure 15Inserting multiple battery cell groups 60 into the space between two adjacent heat exchange components 30 along a third direction, including: inserting all battery cell groups 60 together into the space between two adjacent heat exchange components 30 along a third direction.

[0237] For example, all battery cell groups 60 are pre-installed on the assembly fixture and located on the first side of the assembly fixture. The first side of the assembly fixture is oriented toward the thermal management unit 20. The assembly fixture is moved in a third direction toward the thermal management unit 20 until all battery cell groups 60 are inserted together between two adjacent heat exchange components 30, and the assembly fixture is separated from the battery cell groups 60.

[0238] For example, multiple heat exchange components 30 define multiple insertion spaces 201, and multiple battery cell groups 60 are respectively accommodated in the multiple insertion spaces 201. The multiple insertion spaces 201 are designated as first insertion space 201, second insertion space 201, third insertion space 201, fourth insertion space 201, ... Nth insertion space 201 along the first direction; the multiple battery cell groups 60 are arranged sequentially along the first direction as first group of battery cell groups 60, second group of battery cell groups 60, third group of battery cell groups 60, fourth group of battery cell groups 60, ... Nth group of battery cell groups 60. During assembly, the first to Nth battery cell groups 60 can be inserted together along the third direction into the corresponding first to Nth insertion spaces 201.

[0239] In the above technical solution, by inserting all the battery cell packs 60 together along a third direction between two adjacent heat exchange components 30, the initial assembly process of the battery cell packs 60 and the thermal management unit 20 can be made simpler and easier to operate.

[0240] Thirdly, this application provides an electrical device 1000, including: a battery device 100 according to the first aspect embodiment of this application described above.

[0241] The electrical device 1000 can be a vehicle, and the battery device 100 can be installed at the bottom of the vehicle body 200.

[0242] In the above technical solution, the electrical device 1000 is equipped with the battery device 100, which has high temperature regulation efficiency and high assembly efficiency.

[0243] The following reference Figures 1-13 This application describes a battery device 100 according to some embodiments.

[0244] In this embodiment, the battery device 100 includes a housing 11 and a battery cell assembly 10. The battery cell assembly 10 is disposed within the housing 11 and includes a thermal management unit 20 and multiple battery cell groups 60. The thermal management unit 20 includes a current collector and multiple heat exchange components 30. The multiple heat exchange components 30 are arranged at intervals along a first direction. A battery cell group 60 is provided between every two adjacent heat exchange components 30. The battery cell group 60 is thermally connected to the heat exchange component 30. Each battery cell group 60 includes multiple battery cells 61 arranged along a second direction. The heat exchange component 30 has a plate-like structure, and the battery cell 61 can be a square battery. The large surface of the battery cell 61 can be thermally connected to the heat exchange component 30. Along the first direction, a thermally conductive adhesive layer is provided on the side of the heat exchange component 30 facing the battery cell group 60, or a thermally conductive adhesive layer is provided on the side of the battery cell group 60 facing the heat exchange component 30.

[0245] The current collector assembly may include two sets of current collector components 40, which are disposed on both sides of the battery cell group 60 along the second direction. One of the two sets of current collector components 40 has a current collection inlet 401, and the other has a current collection outlet 402. Each set of current collector components 40 includes a plurality of current collector components 41 arranged along the first direction, and the current collection channels 410 of the plurality of current collector components 41 in each set of current collector components 40 are all connected.

[0246] Each heat exchange component 30 has heat exchange ends 31 at both ends along the second direction, and each heat exchange end 31 is provided with a heat exchange interface 311. One heat exchange interface 311 on each heat exchange component 30 is a heat exchange inlet and the other heat exchange interface 311 is a heat exchange outlet. The heat exchange ends 31 of every two adjacent heat exchange components 30 located at the same end in the second direction are connected by a flow collector 41. One end of the flow collector 41 along the first direction is connected to the heat exchange end 31 by a flexible connection structure 50, and the other end of the flow collector 41 along the first direction is rigidly connected to the heat exchange end 31.

[0247] The flexible connection structure 50 includes a flexible connector 51 and a connecting ring 52. The flexible connector 51 includes a first fixing part 511, a second fixing part 513, and a deformable part 515. The deformable part 515 is connected between the first fixing part 511 and the second fixing part 513. The first fixing part 511, the second fixing part 513, and the deformable part 515 are all annular rings surrounding the current collecting component 41.

[0248] The current collecting component 41 includes a current collecting tube body 411 and a protrusion 414. The two ends of the current collecting tube body 411 along the first direction are a first connecting end 412 and a second connecting end 413, respectively. The protrusion 414 is connected to the first connecting end 412 of the current collecting tube body 411 and is arranged around the current collecting tube body 411. The protrusion 414 protrudes from the current collecting tube body 411 along the first direction and protrudes from the outer peripheral surface of the current collecting tube body 411 along the radial direction. The first fixing part 511 is fixedly connected to the protrusion 414.

[0249] The heat exchange end 31 includes an end body 312, a first connecting protrusion 313, and a second connecting protrusion 314. The first connecting protrusion 313 and the second connecting protrusion 314 are disposed on both sides of the end body 312 along a first direction. The first connecting protrusion 313 is disposed around the collector 41 and surrounds the outer periphery of the collector 41. The connecting ring 52 includes a first ring portion 521 and a second ring portion 522. The first ring portion 521 surrounds the outer periphery of the first connecting protrusion 313 and is sealed to the first connecting protrusion 313. The second ring portion 522 is connected to the side of the first ring portion 521 along the first direction and away from the end body 312. The second ring portion 522 surrounds the outer periphery of the collector 41 and is spaced apart from the collector 41 in the radial direction of the collector 41. The second fixing portion 513 is connected to the second ring portion 522.

[0250] An axial floating gap 54 is formed between the first fixing part 511 and the end body 312 in the first direction, and the first connecting protrusion 313 and the current collecting component 41 are spaced apart in the radial direction of the current collecting component 41 to form a radial floating gap 55.

[0251] The second connecting protrusion 314 is disposed on one side of the end body 312 along the first direction, and the second connecting protrusion 314 is disposed around the current collecting component 41, and the second connecting end 413 of the current collecting component 41 is inserted into the second connecting protrusion 314.

[0252] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0253] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, The device includes a housing and battery cell assemblies. The battery cell assemblies are disposed within the housing and include a thermal management unit and multiple sets of battery cell groups. Each set of battery cell groups includes at least one battery cell. The thermal management unit includes a current collector assembly and multiple heat exchange components. The multiple heat exchange components are arranged at intervals along a first direction. A battery cell group is disposed between every two adjacent heat exchange components. The battery cell group is thermally connected to the heat exchange components. The current collector assembly is located on at least one side of the battery cell group along a second direction and includes multiple current collector components. The second direction intersects the first direction. The end of the heat exchange component along the second direction is the heat exchange end. Each pair of adjacent heat exchange components located at the same end along the second direction are connected by the flow collector. The heat exchange component has a heat exchange channel for the flow of the heat exchange medium, and the flow collector has a flow collection channel for the flow of the heat exchange medium. The heat exchange channel communicates with the flow collection channel. At least one end of the flow collector along the first direction is connected to the heat exchange end via a flexible connection structure, so that the distance between two adjacent heat exchange components is adjustable along the first direction. A floating gap is formed between the end of the flow collector connected to the heat exchange end via the flexible connection structure and the corresponding heat exchange end. The flexible connection structure includes a flexible connector, which includes a first fixing part, a second fixing part, and a deformable part. The deformable part is connected between the first fixing part and the second fixing part. The first fixing part is connected to the flow collector, and the second fixing part is connected to the heat exchange end. The deformable part can deform at least in the first direction and is located on the outer periphery of the flow collector.

2. The battery device according to claim 1, characterized in that, The deformable part can deform along the radial direction of the current collecting component, and the radial direction of the current collecting component is perpendicular to the first direction.

3. The battery device according to claim 1, characterized in that, The flexible connector is a soft rubber component.

4. The battery device according to claim 3, characterized in that, At least a portion of the flexible connector is integrally injection molded into the current collection component.

5. The battery device according to claim 1, characterized in that, The first fixing part, the second fixing part, and the deformation part are all annular structures arranged around the current collecting component.

6. The battery device according to claim 5, characterized in that, The connection between the deformable part and the first fixing part is the first connection point, and the connection between the deformable part and the second fixing part is the second connection point. The direction from the first connection point to the second connection point is the extension direction of the deformable part. The extension direction of the deformable part has an angle with the first direction and the radial direction of the current collecting component.

7. The battery device according to claim 1, characterized in that, The floating gap includes an axial floating gap. The heat exchange end includes an end body and a first connecting protrusion. The first connecting protrusion is disposed on at least one side of the end body along the first direction and surrounds the flow collecting component. The second fixing part is connected to the first connecting protrusion. At least one end of the flow collecting component along the first direction is spaced apart from the end body in the first direction to form the axial floating gap.

8. The battery device according to claim 7, characterized in that, The floating gap includes a radial floating gap, wherein the first connecting convex ring and the current collecting component are spaced apart in the radial direction of the current collecting component to form the radial floating gap.

9. The battery device according to claim 7, characterized in that, The first connecting protrusion surrounds the outer periphery of the current collecting component. In the first direction, the deformable part is connected to the side of the first fixing part along the first direction and away from the end body. The second fixing part is located on the outer periphery of the deformable part.

10. The battery device according to claim 9, characterized in that, The current collecting component includes a current collecting tube body and a protrusion. The protrusion is connected to at least one end of the current collecting tube body along the first direction and is disposed around the current collecting tube body. The protrusion protrudes from the current collecting tube body along the first direction. A first annular cavity is formed in the first fixing part and is disposed around the current collecting tube body. The protrusion is accommodated in the first annular cavity. An axial floating gap is formed between the first fixing part and the end body in the first direction.

11. The battery device according to claim 10, characterized in that, The protrusion extends radially outward from the outer circumferential surface of the manifold.

12. The battery device according to claim 9, characterized in that, The flexible connection structure further includes a connecting ring, the hardness of which is greater than that of the flexible connector. The connecting ring includes a first ring portion and a second ring portion. The first ring portion surrounds the outer periphery of the first connecting protrusion and is sealed to the first connecting protrusion. The second ring portion is connected to the side of the first ring portion along the first direction and away from the end body. The second ring portion surrounds the outer periphery of the current collecting component and is spaced apart from the current collecting component in the radial direction of the current collecting component. The second fixing portion is connected to the second ring portion.

13. The battery device according to claim 12, characterized in that, The second fixing part has a second annular cavity formed around the current collecting component, and the second annular part is accommodated in the second annular cavity.

14. The battery device according to claim 12, characterized in that, The second fixing part is integrally injection molded onto the connecting ring.

15. The battery device according to claim 12, characterized in that, The first ring portion is welded to the first connecting protrusion ring; and / or, a first sealing element is provided between the inner peripheral wall of the first ring portion and the outer peripheral wall of the first connecting protrusion ring.

16. The battery device according to claim 1, characterized in that, One end of the current collector along the first direction is connected to the heat exchange end via the flexible connection structure, and the other end of the current collector along the first direction is rigidly connected to the heat exchange end.

17. The battery device according to claim 16, characterized in that, The heat exchange end includes an end body and a second connecting protrusion. The second connecting protrusion is disposed on one side of the end body along the first direction and surrounds the flow collecting component. The end of the flow collecting component is inserted into the second connecting protrusion.

18. The battery device according to claim 17, characterized in that, The second connecting protrusion is welded to the current collecting component; and / or, a second sealing element is provided between the outer peripheral wall of the current collecting component and the inner peripheral wall of the second connecting protrusion.

19. The battery device according to any one of claims 1-18, characterized in that, The current collector assembly has a current inlet and a current outlet, both of which are connected to the current collection channel. The current collector assembly includes two sets of current collector components, which are respectively disposed on both sides of the battery cell group along the second direction. Each set of current collector components includes a plurality of current collector components arranged along the first direction. The current collection channels of all current collector components in each set of current collector components are connected. One set of current collector components is provided with the current inlet, and the other set of current collector components is provided with the current outlet.

20. The battery device according to any one of claims 1-18, characterized in that, Each group of battery cells includes a plurality of battery cells, and the plurality of battery cells in each group of battery cells are connected as a whole and / or the plurality of battery cells in each group of battery cells are arranged along the second direction.

21. The battery device according to any one of claims 1-18, characterized in that, Along the first direction, a thermally conductive adhesive layer is provided on the side of the heat exchange component facing the battery cell assembly; and / or, along the first direction, a thermally conductive adhesive layer is provided on the side of the battery cell assembly facing the heat exchange component.

22. A method for assembling a battery device, characterized in that, The battery device is the battery device according to any one of claims 1-21, and the assembly method includes: The heat exchange components and the flow collectors are assembled to form the thermal management unit; The thermal management unit is stretched along the first direction; Multiple sets of the battery cells are inserted between two adjacent heat exchange components along a third direction to form a semi-finished battery cell assembly, wherein the third direction, the second direction, and the first direction intersect each other; Pressure is applied along the first direction to both sides of the semi-finished battery cell assembly to press and form the battery cell assembly. The battery cell assembly is assembled into the housing.

23. The assembly method of the battery device according to claim 22, characterized in that, Inserting multiple sets of the aforementioned battery cells into the space between two adjacent heat exchange components along a third direction, including: Multiple sets of the battery cells are sequentially inserted between adjacent heat exchange components; Alternatively, all the battery cells can be inserted together along the third direction between two adjacent heat exchange components.

24. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-21.

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