Battery device and electric device

Abstract

This application provides a battery device and an electrical device, belonging to the field of battery technology. The battery device includes a housing and multiple battery cells. An assembly space is formed inside the housing. Multiple battery cells are housed within the assembly space. Each battery cell is cylindrical, and its central axis extends along a first direction. The housing includes a bottom wall with a first surface and multiple positioning surfaces. The first surface is configured to support the battery cells in the first direction. One end of each positioning surface in the first direction is connected to the first surface. Each battery cell corresponds to at least one positioning surface, and the positioning surface faces the outer peripheral surface of the corresponding battery cell. The positioning surface is an arc surface extending circumferentially along the corresponding battery cell. This reduces the likelihood of shaking or displacement of the cylindrical battery cells during use, and helps alleviate bumps and collisions between battery cells and other components.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, power batteries, as the power source, play an irreplaceable and crucial role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also increasing. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of stability and reliability in use.

[0003] In battery technology, a battery device typically includes a housing and multiple battery cells housed within the housing. These battery cells are connected in series or parallel to form a whole. However, due to the complex operating conditions of battery devices, existing battery devices are prone to battery cells shaking or shifting within the housing during use, especially cylindrical battery cells. This can lead to the risk of bumping and colliding between the battery cells, which is detrimental to improving the stability and reliability of the battery device. Utility Model Content

[0004] This application provides a battery device and an electrical device that can effectively improve the stability and reliability of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, including a housing and a plurality of battery cells; an assembly space is formed inside the housing; the plurality of battery cells are accommodated in the assembly space, the battery cells are cylindrical, and the central axis of the battery cells extends along a first direction; wherein, the housing includes a bottom wall, the bottom wall has a first surface and a plurality of positioning surfaces, the first surface is configured to support the battery cells in the first direction, one end of the positioning surface in the first direction is connected to the first surface, each battery cell is correspondingly disposed with at least one positioning surface, the positioning surface is disposed facing the outer peripheral surface of the corresponding battery cell, and the positioning surface is an arc surface extending circumferentially along the corresponding battery cell.

[0006] In the above technical solution, the battery cells are assembled within the assembly space of the housing, and the bottom wall of the housing has a first surface for supporting the battery cells in a first direction, so that the bottom wall of the housing plays the role of supporting the battery cells. Multiple positioning surfaces connected to the first surface are provided on the bottom wall, with each battery cell corresponding to at least one positioning surface. The positioning surfaces face the outer peripheral surface of the corresponding battery cell and extend circumferentially along the corresponding battery cell, so that each positioning surface and the first surface can jointly define a limiting space for assembling a corresponding battery cell. This allows the bottom wall to also provide a certain limiting and positioning function for each battery cell. On the one hand, this reduces the difficulty of assembling multiple cylindrical battery cells into the housing, which is beneficial for reducing the assembly difficulty of the battery device and improving the accuracy of assembling multiple cylindrical battery cells into the housing. On the other hand, it reduces the phenomenon of shaking or displacement of multiple cylindrical battery cells during use, which helps to alleviate the collision and bumping phenomena between multiple battery cells and between battery cells and other components. This reduces the risk of damage, cracking, or even explosion of cylindrical battery cells during use, thereby improving the stability and reliability of the battery device.

[0007] In some embodiments, the bottom wall includes a plate body and a limiting portion; the surface of the plate body facing the assembly space in the first direction is the first surface; the limiting portion protrudes from the first surface, the limiting portion has the positioning surface, and along the first direction, the limiting portion has a second surface facing the assembly space, the positioning surface connecting the first surface and the second surface.

[0008] In the above technical solution, the bottom wall has a plate body and a limiting part protruding on the plate body. By setting the surface of the plate body facing the assembly space as the first surface and setting the positioning surface on the limiting part, the battery cell is placed on the plate body and at least part of the limiting part is arranged around the battery cell in the circumferential direction. This achieves the formation of a first surface for supporting the battery cell and a positioning surface for limiting the battery cell on the bottom wall. The structure is simple and easy to manufacture.

[0009] In some embodiments, the limiting portion further has a first guiding slope, the positioning surface and the second surface are connected by the first guiding slope, and the first guiding slope is configured to guide the corresponding battery cell into the inner side of the positioning surface.

[0010] In the above technical solution, by setting a first guide slope on the limiting part, and the first guide slope is a structure that connects the positioning surface and the second surface, the first guide slope can play a certain guiding role in the process of assembling the battery cell to the inner side of the positioning surface, so as to reduce the assembly difficulty between the battery cell and the bottom wall, thereby improving the assembly efficiency of assembling multiple battery cells into the box.

[0011] In some embodiments, along the first direction, the height of the positioning surface is H1, and the height of the outer peripheral surface of the battery cell is H2, satisfying that 1 / 4 ≤ H1 / H2 ≤ 2 / 3.

[0012] In the above technical solution, the height of the positioning surface in the first direction is 1 / 4 to 2 / 3 of the height of the outer peripheral surface of the battery cell in the first direction. On the one hand, setting the height of the positioning surface in the first direction to be greater than or equal to 1 / 4 of the height of the outer peripheral surface of the battery cell in the first direction is beneficial to improving the limiting effect of the positioning surface on the battery cell, so as to reduce the phenomenon of the battery cell tilting during use. On the other hand, setting the height of the positioning surface in the first direction to be less than or equal to 2 / 3 of the height of the outer peripheral surface of the battery cell in the first direction reduces the space occupied by the positioning surface, which is beneficial to improving the internal space utilization of the box and can reduce the difficulty of forming the positioning surface on the bottom wall, thereby reducing the manufacturing difficulty of the box.

[0013] In some embodiments, the perimeter of the battery cell is L1, and the total length of all the positioning surfaces corresponding to the same battery cell in the circumferential direction of the battery cell is L2, satisfying that L2≥0.5L1.

[0014] In the above technical solution, by setting the total length of all positioning surfaces corresponding to the same battery cell in the circumferential direction of the battery cell to be greater than or equal to 0.5 times the circumference of the battery cell, the limiting and positioning effect of the limiting surfaces on the battery cell can be improved. This is beneficial to further improve the accuracy of assembling multiple battery cells of the cylindrical structure into the box, and can further reduce the phenomenon of shaking or displacement of multiple battery cells of the cylindrical structure during use, so as to further alleviate the bumping and collision between multiple battery cells and between battery cells and other components.

[0015] In some embodiments, the battery device further includes a first adhesive; at least a portion of the first adhesive is disposed between the first surface and the battery cell, the first adhesive connecting the first surface and the battery cell.

[0016] In the above technical solution, by setting a first adhesive between the first surface and the battery cell, the first adhesive can fix the battery cell on the first surface, which helps to improve the stability of the battery cell assembly in the housing.

[0017] In some embodiments, a portion of the first adhesive is located between the positioning surface and the outer peripheral surface of the battery cell, and the first adhesive connects the positioning surface and the battery cell.

[0018] In the above technical solution, by setting the first adhesive portion to extend between the positioning surface and the outer peripheral surface of the battery cell, the reliability of the battery cell connection to the first surface can be further improved, and the stability of the battery cell assembled to the inner side of the positioning surface can be further improved, thereby further improving the stability of the battery cell assembled in the housing, so as to further reduce the risk of shaking or displacement of the battery cell during use.

[0019] In some embodiments, the positioning surface is provided with a plurality of limiting protrusions, and the plurality of limiting protrusions are arranged at intervals along the circumference of the battery cell. The limiting protrusions abut against the outer peripheral surface of the corresponding battery cell, so that the positioning surface and the outer peripheral surface of the battery cell are spaced apart.

[0020] In the above technical solution, by providing multiple limiting protrusions on the positioning surface that are spaced apart along the circumference of the battery cell, and the limiting protrusions being structures that abut against the corresponding battery cell, it is possible to achieve a structure in which the positioning surface and the outer peripheral surface of the corresponding battery cell are separated by a gap. On the one hand, this facilitates the application of the first adhesive between the positioning surface and the corresponding battery cell, thereby reducing the assembly difficulty of the battery cell. On the other hand, it can form an overflow space between the positioning surface and the outer peripheral surface of the corresponding battery cell, which helps to reduce the difficulty of applying the first adhesive between the first surface and the battery cell.

[0021] In some embodiments, the limiting protrusion extends along the first direction.

[0022] In the above technical solution, by setting the limiting protrusion as a structure extending along the first direction, on the one hand, the obstruction and interference of the limiting protrusion on the battery cell can be reduced during the process of inserting the battery cell into the inner side of the positioning surface, so as to reduce the assembly difficulty of the battery cell. On the other hand, the obstruction of the limiting protrusion on the first adhesive overflowing between the first surface and the battery cell can be reduced, so that the first adhesive can enter between the positioning surface and the outer peripheral surface of the corresponding battery cell.

[0023] In some embodiments, along the first direction, a second guide slope is provided at one end of the limiting protrusion away from the first surface, the second guide slope being configured to guide the corresponding battery cell into the inner side of the positioning surface.

[0024] In the above technical solution, by setting a second guide slope at the end of the limiting protrusion away from the first surface, the second guide slope can play a certain guiding role in the process of assembling the battery cell to the inner side of the positioning surface, thereby reducing the obstruction and interference of the limiting protrusion on the battery cell, and reducing the assembly difficulty between the battery cell and the bottom wall, so as to improve the assembly efficiency of assembling multiple battery cells into the box.

[0025] In some embodiments, the bottom wall further has a first guide ramp connected to one end of the positioning surface away from the first surface in the first direction, the first guide ramp being configured to guide the corresponding battery cell into the inner side of the positioning surface; wherein the first guide ramp is connected to a second guide ramp.

[0026] In the above technical solution, by setting the first guide slope connected to the end of the positioning surface away from the first surface and the second guide slope connected to the end of the limiting protrusion away from the first surface as an interconnected structure, it is convenient for the battery cell to be assembled into the inner side of multiple limiting protrusions in sequence under the guidance of the first guide slope and the second guide slope, thereby further reducing the assembly difficulty between the battery cell and the bottom wall.

[0027] In some embodiments, within the same cross section parallel to the first direction, the angle between the first guide slope and the first direction is equal to the angle between the second guide slope and the first direction.

[0028] In the above technical solution, within the same cross section parallel to the first direction, by setting the angle between the first guide slope and the first direction to be equal to the angle between the second guide slope and the first direction, the first guide slope and the second guide slope are made to be similarly coplanar, thereby achieving a smooth transition at the connection position of the first guide slope and the second guide slope. This reduces the impact or jamming of the battery cell during the process of guiding the battery cell to the second guide slope from the first guide slope, which is beneficial to further reduce the assembly difficulty between the battery cell and the bottom wall.

[0029] In some embodiments, the battery device further includes a thermal management component disposed within the housing and configured to exchange heat with the battery cells; wherein the thermal management component includes a body segment along the first direction, the body segment being located on the side of the battery cell facing the first surface, and in a projection plane perpendicular to the first direction, at least a portion of the orthographic projection of each battery cell overlaps with a portion of the orthographic projection of the body segment.

[0030] In the above technical solution, a thermal management component is also provided inside the battery device housing. The thermal management component has a main body section for heat exchange with the battery cells. By setting the main body section of the thermal management component on the side of the battery cell facing the first surface in the first direction, and in the projection plane perpendicular to the first direction, at least a portion of the orthographic projection of each battery cell overlaps with at least a portion of the orthographic projection of at least one main body section, the cylindrical battery cell has a bottom heat exchange structure inside the housing. At least a portion of each battery cell is correspondingly set with the main body section of the thermal management component. Thus, the battery device with this structure can achieve heat exchange between the thermal management component and each battery cell, while also reducing the assembly difficulty between the thermal management component and the cylindrical battery cell. It can also reduce the phenomenon of the thermal management component occupying space between multiple battery cells, which is conducive to optimizing the internal space layout of the battery device and improving the internal space utilization rate of the battery device. In this way, while taking into account the heat exchange effect between the thermal management component and the battery cell, it can effectively improve the assembly efficiency and energy density of the battery device.

[0031] In some embodiments, the battery device includes a plurality of battery cell groups arranged along a second direction, each battery cell group including a plurality of battery cells arranged along a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other; wherein the thermal management component includes a plurality of body segments arranged at intervals along the second direction, and the body segments extend along the third direction, and in a projection plane perpendicular to the first direction, at least a portion of the orthographic projection of each battery cell group overlaps with at least a portion of the orthographic projection of at least one body segment.

[0032] In the above technical solution, the battery device includes multiple battery cell groups arranged along a second direction, and each battery cell group includes multiple battery cells arranged along a third direction, such that the multiple battery cells of the battery device are arranged in an array within a housing. The thermal management component is configured to include multiple main body segments arranged at intervals along the second direction, with each main body segment extending along a third direction. This ensures that the arrangement direction of the main body segments is the same as the arrangement direction of the multiple battery cell groups, and the extension direction of the main body segments is the same as the arrangement direction of the multiple battery cells in each battery cell group. This facilitates the corresponding arrangement of each main body segment and at least one battery cell group in the first direction, achieving a structure where at least a portion of the orthographic projection of each battery cell in a projection plane perpendicular to the first direction overlaps with at least a portion of the orthographic projection of at least one main body segment. This further reduces the assembly difficulty between the thermal management component and the multiple battery cells and facilitates heat exchange between the thermal management component and each battery cell.

[0033] In some embodiments, the battery device includes multiple pairs of battery cell groups arranged along the second direction, each pair of battery cell groups including two battery cell groups; wherein, the two battery cell groups in each pair of battery cell groups are respectively provided with one main body segment in the first direction.

[0034] In the above technical solution, by setting a main body section for each pair of battery cells in the box, it is possible to ensure that each battery cell has a corresponding main body section while reducing the number of main body sections of the thermal management components arranged in the second direction. On the one hand, it can reduce the manufacturing and assembly difficulty of the thermal management components, and on the other hand, it can optimize the internal space layout of the box and save the space occupied by the thermal management components.

[0035] In some embodiments, each of the battery cell groups is provided with a corresponding main body segment in the first direction.

[0036] In the above technical solution, by setting each battery cell group to have a corresponding main body segment in the first direction, each battery cell group is a structure that exchanges heat with the corresponding main body segment, thereby reducing the mutual influence of multiple battery cell groups when exchanging heat with the corresponding main body segment, which is beneficial to improving the heat exchange effect between the thermal management component and the battery cell.

[0037] In some embodiments, each pair of adjacent battery cells is provided with one main body segment in the first direction.

[0038] In the above technical solution, by setting each pair of adjacent battery cell groups to a structure in which a main body segment is set in the first direction, each pair of adjacent battery cell groups can share a main body segment, and each battery cell group is set in a structure corresponding to the two adjacent main body segments, thereby optimizing the internal spatial layout of the housing and improving the heat exchange effect between the thermal management components and the battery cells.

[0039] In some embodiments, the interior of the main body segment has a first flow channel for accommodating the heat exchange medium; wherein, the thermal management component further includes a plurality of connecting segments, the interior of which has a second flow channel for accommodating the heat exchange medium, each pair of adjacent main body segments is connected by one of the connecting segments, and in three adjacent main body segments, the two ends of the middle main body segment are respectively connected to two of the connecting segments to connect the first flow channel and the second flow channel.

[0040] In the above technical solution, the thermal management component is also provided with multiple connecting sections. By setting each pair of adjacent main body sections in the second direction to be connected by a connecting section, and in the three adjacent main body sections, setting the two ends of the middle main body section to be connected to two connecting sections respectively, the first flow channel of the multiple main body sections of the thermal management component is connected end to end by the second flow channel of the multiple connecting sections to form a structure in series connection of multiple main body sections. The thermal management component with this structure can reduce the molding difficulty of multiple main body sections and is conducive to improving the manufacturing efficiency of the thermal management component.

[0041] In some embodiments, a first flow channel for accommodating heat exchange medium is formed inside the main body segment; wherein, the thermal management component further includes a first delivery pipe and a second delivery pipe, one end of each of the plurality of main body segments is connected to the first delivery pipe and the other end is connected to the second delivery pipe to connect the first flow channel, the first delivery pipe and the second delivery pipe.

[0042] In the above technical solution, the thermal management component is further provided with a first conveying pipe and a second conveying pipe. By setting one end of multiple main sections to be connected to the first conveying pipe and the other end to be connected to the second conveying pipe, the first flow channels of multiple main sections are interconnected through the first and second conveying pipes to form a structure in which multiple main sections are connected in parallel. The thermal management component with this structure can reduce the mutual influence of the heat exchange medium in the first flow channels of multiple main sections, which is conducive to alleviating the phenomenon of excessive temperature difference between multiple main sections. This can effectively improve the heat exchange balance between multiple main sections of the thermal management component and different battery cell groups, thereby improving the heat exchange effect between the thermal management component and multiple battery cells.

[0043] In some embodiments, the positioning surfaces are spaced apart at both ends of the corresponding battery cell in the circumferential direction, and in a projection plane perpendicular to the first direction, the orthographic projection of the positioning surfaces and the orthographic projection of the main body segment do not overlap.

[0044] In the above technical solution, by setting the two ends of the positioning surface in the circumferential direction of the corresponding battery cell to be spaced apart, the positioning surface is an arc-shaped structure that extends along the circumferential direction of the corresponding battery cell and is not connected end to end. Furthermore, the orthographic projection of the positioning surface and the orthographic projection of the main body segment in the projection plane perpendicular to the first direction are set to not overlap, so that the main body segment of the thermal management component is not set with a corresponding positioning surface in the first direction. This reduces the interference between the main body segment and the positioning surface during the assembly of the main body segment to the side of the battery cell facing the first surface, which helps to reduce the assembly difficulty of the main body segment of the thermal management component.

[0045] In some embodiments, the thermal management component includes a plurality of main body segments spaced apart along a second direction, and the main body segments extend along a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other; wherein, along the second direction, a positioning surface is provided between each pair of adjacent main body segments.

[0046] In the above technical solution, by providing a positioning surface between each pair of adjacent main body segments in the second direction, a battery cell is provided between each pair of adjacent main body segments, and the battery cells provided between the adjacent main body segments are positioned and limited by the positioning surface, thereby improving the assembly accuracy between the battery cells and the main body segments and improving the stability of heat exchange between the main body segments and the battery cells.

[0047] In some embodiments, each of the main body segments is provided with positioning surfaces on both sides in the second direction, and the positioning surfaces on both sides of the same main body segment are arranged opposite to each other along the second direction.

[0048] In the above technical solution, by setting positioning surfaces on both sides of each main body segment along the second direction, and the positioning surfaces on both sides of the main body segment being arranged opposite each other in the second direction, it is convenient to assemble battery cells on both sides of the main body segment, and the assembly difficulty between the battery cells and the bottom wall can be reduced.

[0049] In some embodiments, the bottom wall includes a plate body and a limiting portion. The plate body has a first surface, the limiting portion protrudes from the first surface and has a positioning surface. Along the first direction, the limiting portion has a second surface facing the assembly space, and the positioning surface connects the first surface and the second surface. In a projection plane perpendicular to the first direction, the orthographic projection of the limiting portion does not overlap with the orthographic projection of the main body segment.

[0050] In the above technical solution, by setting the orthographic projections of the limiting part and the main body segment in the projection plane perpendicular to the first direction as non-overlapping structures, the interference between the limiting part and the main body segment can be reduced, which helps to reduce the difficulty of setting the main body segment on the side of the battery cell facing the first surface, thereby reducing the difficulty of assembling the thermal management component into the housing.

[0051] In some embodiments, the plate body and the limiting part are integrally formed; or, the plate body and the limiting part are separately disposed and connected.

[0052] In the above technical solution, by making the bottom wall plate body and the limiting part an integrally formed structure, the connection between the plate body and the limiting part is improved, thereby enhancing the stability and reliability of the positioning surface for positioning and limiting the battery cell. By making the plate body and the limiting part a separate but connected structure, it is easier to form the first surface and the positioning surface on the bottom wall, which helps to reduce the manufacturing difficulty of the bottom wall and makes it easier to position the main body of the thermal management component on the side of the battery cell facing the first surface, thus reducing the assembly difficulty of the thermal management component.

[0053] In some embodiments, the positioning surface and the main body segment are arranged along the first direction, and at least a portion of the orthographic projection of the positioning surface and at least a portion of the orthographic projection of the main body segment overlap in a projection plane perpendicular to the first direction.

[0054] In the above technical solution, by setting the positioning surface and the main body segment as a structure arranged along the first direction, and setting the orthographic projection of the positioning surface and the main body segment in the projection plane perpendicular to the first direction as a structure that at least partially overlaps, the extension dimension of the positioning surface in the circumferential direction of the corresponding battery cell is not affected by the main body segment, which is beneficial to increase the extension dimension of the positioning surface in the circumferential direction of the corresponding battery cell, so as to improve the positioning and positioning effect of the positioning surface on the battery cell.

[0055] In some embodiments, the positioning surface is an annular structure extending circumferentially along the corresponding battery cell.

[0056] In the above technical solution, by setting the positioning surface as a ring structure extending circumferentially along the corresponding battery cell, the positioning surface is a structure surrounding the periphery of the corresponding battery cell. This can further improve the limiting and positioning effect of the positioning surface on the battery cell, thereby further reducing the phenomenon of shaking or displacement of multiple battery cells in the cylindrical structure during use. It is also beneficial to further alleviate the collision and bumping phenomenon between multiple battery cells and between battery cells and other components, and further reduce the risk of damage, cracking or even explosion of the cylindrical battery cells during use.

[0057] In some embodiments, the bottom wall includes a plate body and a limiting portion, the plate body having a first surface, the limiting portion protruding from the first surface and having a positioning surface, and along the first direction, the limiting portion having a second surface facing the assembly space, the positioning surface connecting the first surface and the second surface; wherein, along the first direction, the main body segment is located on the side of the limiting portion facing the plate body.

[0058] In the above technical solution, by setting the main body segment of the thermal management component to a structure located on the side of the limiting part facing the plate body in the first direction, the main body segment and the positioning surface are arranged along the first direction, thereby facilitating the realization that the extension dimension of the positioning surface in the circumferential direction of the corresponding battery cell is not affected by the main body segment.

[0059] In some embodiments, the plate body and the limiting portion are disposed and connected.

[0060] In the above technical solution, by setting the plate body and the limiting part as separate but connected structures, the main body segment can be assembled onto the plate body first, and then the limiting part can be assembled and connected to the plate body. This reduces the difficulty of setting the main body segment to be located on the side of the limiting part facing the plate body, thereby reducing the assembly difficulty of the thermal management components and optimizing the assembly process of the battery device to improve the production efficiency of the battery device.

[0061] In some embodiments, the first surface is provided with a mounting groove, and at least a portion of the main body segment is disposed within the mounting groove.

[0062] In the above technical solution, by setting an installation groove on the first surface of the bottom wall used to support the battery cell, and at least a portion of the main body of the thermal management component is disposed in the installation groove along the first direction, the installation groove can provide a certain limiting and positioning function for the main body of the thermal management component, thereby improving the stability and reliability of the main body assembly into the housing and reducing the risk of displacement or shaking of the main body during use. The installation groove can also provide a certain protection for the main body, reducing wear and impact during use. On the other hand, the bottom wall and the main body can share a portion of the space in the first direction, thereby reducing the space occupied by the thermal management component in the housing for assembling the battery cell. It can also optimize the internal spatial layout of the battery device and reduce the assembly interference between the thermal management component and the battery cell, thereby effectively improving the energy density of the battery device and reducing the assembly difficulty of the battery device.

[0063] In some embodiments, the body segment does not protrude from the first surface along the first direction.

[0064] In the above technical solution, by setting the main body of the thermal management component to a structure that does not extend beyond the first surface in the first direction, the main body is located entirely within the mounting groove in the first direction. This can further improve the protective effect of the mounting groove on the main body, which is conducive to further reducing the wear and impact on the main body during use. It can also further reduce the space occupied by the thermal management component in the housing for assembling battery cells, which is conducive to further optimizing the internal spatial layout of the battery device and reducing the assembly interference between the thermal management component and the battery cells.

[0065] In some embodiments, the battery device further includes a second adhesive; at least a portion of the second adhesive is disposed between the main body segment and the bottom surface of the mounting groove, and the second adhesive connects the main body segment and the bottom surface of the mounting groove.

[0066] In the above technical solution, by setting a second adhesive between the main body section and the bottom surface of the mounting groove, the second adhesive can fix the main body section in the mounting groove, which helps to improve the stability of the main body section of the thermal management component assembled in the mounting groove.

[0067] In some embodiments, the battery device further includes a third adhesive; at least a portion of the third adhesive is disposed between the body segment and the battery cell, and the third adhesive connects the body segment and the battery cell.

[0068] In the above technical solution, by setting a third adhesive between the main body segment and the battery cell, the third adhesive can fix the battery cell and the main body segment into a whole, thereby reducing the relative displacement between the battery cell and the main body segment during the use of the battery device, so as to improve the heat exchange effect between the main body segment and the battery cell.

[0069] In some embodiments, the bottom wall is made of an insulating material.

[0070] In the above technical solution, by setting the bottom wall of the box to an insulating material, the risk of short circuit between the battery cells and the first surface or positioning surface of the bottom wall during use is reduced, which helps to improve the reliability of the battery device.

[0071] In some embodiments, the housing includes a first housing body and a second housing body that are separately disposed, the first housing body and the second housing body overlapping each other along the first direction to jointly define the assembly space.

[0072] In the above technical solution, the box has a first box body and a second box body that are separately set, and the first box body and the second box body are connected to each other along the first direction to form an assembly space, so as to set the battery cells in the assembly space of the box and assemble the battery cells along the first direction to the inner side of the positioning surface corresponding to the bottom wall, which helps to reduce the difficulty of assembling the battery cells into the box.

[0073] In some embodiments, the first box body is an injection molded part.

[0074] In the above technical solution, by setting the first box body as an injection molded part, it is beneficial to reduce the difficulty of forming a positioning surface on the bottom wall of the first box body, thereby reducing the manufacturing difficulty of the first box body.

[0075] In some embodiments, the battery device further includes a mounting member; the mounting member is mounted on the first housing body and is used to connect to a target component to assemble the battery device onto the target component; wherein the strength of the material of the mounting member is greater than the strength of the material of the first housing body.

[0076] In the above technical solution, a mounting component is installed on the first box body to facilitate the assembly of the battery device onto the target part for use. By setting the strength of the material of the mounting component to be greater than that of the material of the first box body, the difficulty of forming the positioning surface on the bottom wall of the first box body can be reduced, while the stability and reliability of the battery device being mounted onto the target part through the mounting component can be improved, and the mounting component can have better resistance to deformation.

[0077] In some embodiments, the mount is made of metal.

[0078] In the above technical solution, by setting the mounting component to a metal material, the mounting component has good structural strength and good aging resistance, which is beneficial to improving the service life of the mounting component.

[0079] In some embodiments, at least a portion of the mount is located on the side of the bottom wall away from the assembly space in the first direction, and the mount extends along a second direction and extends beyond both ends of the bottom wall, the second direction being perpendicular to the first direction.

[0080] In the above technical solution, by setting the mounting member to extend along the second direction and setting the two ends of the second direction to extend out of the bottom wall, the support effect of the mounting member on the bottom wall of the first box body can be improved, thereby improving the stability and reliability of the battery device being loaded onto the target part through the mounting member, and the deformation resistance of the bottom wall of the first box body can be improved through the mounting member.

[0081] In some embodiments, there are multiple mounts, and the multiple mounts are arranged at intervals along a third direction, with the first direction, the second direction, and the third direction being perpendicular to each other.

[0082] In the above technical solution, by setting multiple mounting components arranged along a third direction on the first box body, the support effect of the mounting components on the bottom wall of the first box body can be further improved, thereby further improving the stability and reliability of the battery device being loaded onto the target component through the mounting components, and the deformation resistance of the bottom wall of the first box body can be further improved through the mounting components.

[0083] Secondly, embodiments of this application also provide an electrical device, including the battery device described above, wherein the battery device is used to provide electrical energy. Attached Figure Description

[0084] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0085] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0086] Figure 2 Exploded views of the structure of the battery device provided in some embodiments of this application;

[0087] Figure 3 A schematic diagram of the structure of the first housing body of the battery device housing provided in some embodiments of this application;

[0088] Figure 4 for Figure 3 A magnified view of point A on the first box body shown;

[0089] Figure 5 A partial cross-sectional view of the bottom wall of the battery device housing provided in some embodiments of this application;

[0090] Figure 6 for Figure 5 A magnified view of a portion of the bottom wall at point B;

[0091] Figure 7 This is a schematic diagram of the structure of a single battery cell in a battery device provided in some embodiments of this application;

[0092] Figure 8 A front view of a battery cell of a battery device provided in some embodiments of this application;

[0093] Figure 9 for Figure 3 A magnified view of point C on the first box body shown;

[0094] Figure 10 An assembly diagram of the first housing body and thermal management components provided for some embodiments of this application;

[0095] Figure 11 This is a schematic diagram of the structure of a thermal management component provided in some embodiments of this application;

[0096] Figure 12 This is an assembly diagram of the main body segment of the battery cell and thermal management component provided in some embodiments of this application;

[0097] Figure 13 An assembly diagram of the main body segment of the battery cell and thermal management component provided for some embodiments of this application;

[0098] Figure 14 This is an assembly diagram of the main body segment of the battery cell and thermal management component provided in some embodiments of this application;

[0099] Figure 15 A front view of a thermal management component provided in a first direction for some embodiments of this application;

[0100] Figure 16 A front view of a thermal management component provided in a first direction for some other embodiments of this application;

[0101] Figure 17 This is an assembly diagram of the first box body and the mounting component provided for some embodiments of this application.

[0102] Icons: 1000 - Vehicle; 100 - Battery assembly; 10 - Housing; 11 - First housing body; 111 - Bottom wall; 1111 - Plate body; 1111a - First surface; 1111b - Mounting groove; 1111c - Protrusion; 1112 - Limiting part; 1112a - Positioning surface; 1112b - Second surface; 1112c - First guide slope; 1113 - Limiting protrusion; 1113a - Second guide slope; 112-Side wall; 12-Second box body; 20-Battery cell group; 21-Battery cell; 211-Outer shell; 2111-Shell; 2112-End cap; 212-Electrode terminal; 30-Thermal management component; 31-Main body section; 32-Connecting section; 33-First delivery pipe; 34-Second delivery pipe; 40-Hanging component; 200-Controller; 300-Motor; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] In this application, "multiple" means two or more (including two).

[0110] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0111] 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 the embodiments of this application are not limited to this.

[0112] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, serves to prevent short circuits to some extent while allowing active ions to pass through.

[0113] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0114] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloys, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, lithium source material, potassium metal, or sodium metal can also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0115] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0116] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0117] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0118] In some embodiments, the separator is a separator membrane. The separator membrane can be of various types, and any known porous separator membrane with good chemical and mechanical stability can be selected.

[0119] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0120] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0121] In some implementations, the electrode assembly has a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0122] In some implementations, the electrode assembly has a stacked structure.

[0123] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0124] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0125] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0126] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0127] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0128] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0129] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0130] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0131] As an example, the enclosure may include a first enclosure body and a second enclosure body. The first enclosure body and the second enclosure body are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, which can be either sealed or unsealed. The first enclosure body may be a top cover or a bottom plate.

[0132] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0133] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0134] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0135] Battery devices possess outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide applicability, and low self-discharge coefficient, making them an important component of today's new energy development. The development of battery technology must simultaneously consider multiple design factors, such as performance parameters like energy density, cycle life, discharge capacity, and charge / discharge rate. Furthermore, the reliability of the battery device must also be taken into account.

[0136] For a typical battery device, it usually consists of a housing and multiple battery cells housed within the housing. These battery cells are connected in series or parallel to form a whole. Due to the complex operating conditions of battery devices, related technologies often use cable ties, clamping plates, or end plates to secure the multiple battery cells into a module before placing it in the housing. This reduces the likelihood of the battery cells shaking or shifting during use. However, this type of battery device has a complex assembly structure and is difficult to assemble, which is not conducive to improving the production efficiency of the battery device. Furthermore, during use, the module formed by multiple battery cells can still shake or shift within the housing, especially for cylindrical battery cells. This can easily lead to collisions and impacts between the battery cells and between the battery cells and the housing, which can result in damage, cracking, or even explosion of the battery cells during use. This is detrimental to improving the stability and reliability of the battery device.

[0137] Based on the above considerations, in order to solve the problem of low stability and reliability of battery devices, this application provides a battery device including a housing and multiple battery cells. An assembly space is formed inside the housing. Multiple battery cells are housed within the assembly space. Each battery cell is cylindrical, and its central axis extends along a first direction. The housing includes a bottom wall with a first surface and multiple positioning surfaces. The first surface is configured to support the battery cells in the first direction. One end of each positioning surface in the first direction is connected to the first surface. Each battery cell corresponds to at least one positioning surface, and the positioning surface faces the outer peripheral surface of the corresponding battery cell. The positioning surface is an arcuate surface extending circumferentially along the corresponding battery cell.

[0138] In this battery device structure, individual battery cells are assembled within the assembly space of a housing. The bottom wall of the housing has a first surface in a first direction for supporting the battery cells, thus enabling the bottom wall to support the battery cells. Multiple positioning surfaces connected to the first surface are provided on the bottom wall, with each battery cell corresponding to at least one positioning surface. These positioning surfaces face the outer peripheral surface of the corresponding battery cell and extend circumferentially along the corresponding battery cell. This allows each positioning surface and the first surface to jointly define a limiting space for assembling a corresponding battery cell. The bottom wall also provides a certain limiting and positioning function for each battery cell. This reduces the difficulty of assembling multiple cylindrical battery cells into the housing, improving the assembly accuracy of the battery device. Furthermore, it reduces the likelihood of shaking or displacement of the multiple cylindrical battery cells during use, mitigating collisions and impacts between battery cells and other components. This reduces the risk of damage, cracking, or even explosion of the cylindrical battery cells during use, thereby improving the stability and reliability of the battery device.

[0139] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be composed of the battery device disclosed in this application. This helps to mitigate problems such as bumps and collisions between multiple battery cells and between battery cells and the casing, thereby improving the stability and reliability of the battery device.

[0140] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. 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.

[0141] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0142] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000; for example, the battery device 100 can serve as the operating power source or general power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0143] In some embodiments of this application, the battery device 100 can not only serve as the operating power or power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0144] According to some embodiments of this application, refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, Figure 2 This is an exploded view of the structure of the battery device 100 provided in some embodiments of this application. Figure 3 This is a schematic diagram of the structure of the first housing body 11 of the housing 10 of the battery device 100 provided in some embodiments of this application. Figure 4 for Figure 3 The image shows a partial enlarged view of point A on the first box body 11. Figure 5 This is a partial cross-sectional view of the bottom wall 111 of the housing 10 of the battery device 100 provided in some embodiments of this application. Figure 6 for Figure 5 The enlarged view of part B of the bottom wall 111 shown. Figure 7This is a schematic diagram of the structure of a battery cell 21 in a battery device 100 provided in some embodiments of this application. This application provides a battery device 100, which includes a housing 10 and a plurality of battery cells 21. An assembly space is formed inside the housing 10. The plurality of battery cells 21 are housed within the assembly space. Each battery cell 21 is cylindrical, and its central axis extends along a first direction X. The housing 10 includes a bottom wall 111, which has a first surface 1111a and a plurality of positioning surfaces 1112a. The first surface 1111a is configured to support the battery cells 21 in the first direction X. One end of each positioning surface 1112a in the first direction X is connected to the first surface 1111a. Each battery cell 21 is correspondingly provided with at least one positioning surface 1112a. The positioning surface 1112a faces the outer peripheral surface of the corresponding battery cell 21, and the positioning surface 1112a is an arcuate surface extending circumferentially along the corresponding battery cell 21.

[0145] The housing 10 provides assembly space for the battery cell 21, and can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which overlap each other along a first direction X, and together define an assembly space for accommodating the battery cell 21. The first housing body 11 may be a hollow structure open at one end, and the second housing body 12 may be a plate-like structure, covering the open side of the first housing body 11 so that the first housing body 11 and the second housing body 12 together define the assembly space; alternatively, the first housing body 11 and the second housing body 12 may both be hollow structures open on one side, with the open side of the second housing body 12 covering the open side of the first housing body 11.

[0146] For example, combined Figure 2 and Figure 3 As shown, the first box body 11 has a bottom wall 111, and correspondingly, the first box body 11 also has a side wall 112. The side wall 112 surrounds the bottom wall 111, and one end of the side wall 112 in the first direction X is connected to the bottom wall 111, while the other end is enclosed to form an open end. The second box body 12 covers the open end of the side wall 112 and is connected to the side wall 112.

[0147] Optionally, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as a cylinder, a cuboid, or a cube. For example, in... Figure 2 In the middle, the shape of box 10 is a cuboid.

[0148] The bottom wall 111 of the housing 10 has a first surface 1111a, which is configured to support the battery cell 21 in the first direction X. That is, the bottom wall 111 is a wall of the housing 10 located at the bottom of the battery cell 21 in the first direction X, and the battery cell 21 is placed on the first surface 1111a of the bottom wall 111, so that the first surface 1111a of the bottom wall 111 can support the electrode assembly. Correspondingly, the first direction X is the direction of gravity or a direction approximately equal to the direction of gravity.

[0149] The bottom wall 111 also has a plurality of positioning surfaces 1112a. One end of the positioning surface 1112a in the first direction X is connected to the first surface 1111a. That is, the positioning surface 1112a is a surface arranged along the first direction X, and the end of the positioning surface 1112a near the first surface 1111a in the first direction X is connected to the first surface 1111a. It should be noted that the positioning surface 1112a and the first surface 1111a can be directly connected or indirectly connected through a chamfered surface. Of course, the positioning surface 1112a can also be a structure in which one end of the positioning surface 1112a abuts against the first surface 1111a in the first direction X.

[0150] Each battery cell 21 is correspondingly provided with at least one positioning surface 1112a. That is, the battery cell 21 and the positioning surface 1112a can be a one-to-one correspondence structure, or one battery cell 21 can be corresponding to one positioning surface 1112a.

[0151] The positioning surface 1112a is arranged facing the outer peripheral surface of the corresponding battery cell 21, and the positioning surface 1112a is an arc surface extending along the circumference of the corresponding battery cell 21. That is to say, among all the positioning surfaces 1112a corresponding to the battery cell 21, the positioning surface 1112a is an arc-shaped structure or annular structure extending along the circumference of the battery cell 21, and the positioning surface 1112a is arranged facing the outer peripheral surface of the battery cell 21, so that all the positioning surfaces 1112a corresponding to the battery cell 21 are structures surrounding the outside of the battery cell 21.

[0152] For example, each battery cell 21 may have one or more positioning surfaces 1112a. Figure 3 and Figure 4 In this embodiment, a positioning surface 1112a is provided for each battery cell 21. The positioning surface 1112a is a structure that surrounds at least part of the battery cell 21. Of course, in other embodiments, the battery cell 21 may also be a structure that corresponds to two, three or four positioning surfaces 1112a. In this case, multiple positioning surfaces 1112a are arranged at intervals along the circumference of the corresponding battery cell 21 and surround the corresponding battery cell 21.

[0153] In the embodiments of this application, reference is made to Figure 7 Please refer to further details. Figure 8 , Figure 8 This is a front view of a battery cell 21 of a battery device 100 provided in some embodiments of this application. The battery cell 21 includes a housing 211 and an electrode assembly (not shown in the figure). The housing 211 is also provided with electrode terminals 212, which are used to electrically connect with the electrode assembly to realize the input or output of electrical energy of the battery cell 21.

[0154] Among them, the battery cell 21 is cylindrical, that is, the outer shell 211 of the battery cell 21 is a cylindrical structure, and the central axis of the battery cell 21 extends along the first direction X, that is, the height direction of the cylindrical outer shell 211 is the first direction X. Correspondingly, the circumference of the battery cell 21 is circular, and the positioning surface 1112a is an arc surface extending along the circumference of the corresponding battery cell 21. The outer circumferential surface of the battery cell 21 is the outer circumferential surface of the outer shell 211. Similarly, the circumferential direction of the battery cell 21 is also the circumferential direction of the outer shell 211.

[0155] exist Figure 5 and Figure 6 In the process, the housing 211 may include a housing 2111 and an end cap 2112, the housing 2111 being a hollow structure with an opening at at least one end in the first direction X, and the end cap 2112 closing the opening so that the housing 2111 and the end cap 2112 together define a sealed space for accommodating the electrode assembly.

[0156] In the battery device 100, the multiple battery cells 21 disposed within the housing 10 can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that the multiple battery cells 21 are connected in both series and parallel configurations. The multiple battery cells 21 can be directly connected in series, in parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 21 is housed within the housing 10. Alternatively, the battery device 100 can also be composed of multiple battery cells 21 first connected in series, in parallel, or in a mixed configuration to form a battery module, and then the multiple battery modules are connected in series, in parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10.

[0157] In some embodiments, the battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar for connecting multiple battery cells 21 to achieve electrical connection between the multiple battery cells 21.

[0158] Each battery cell 21 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited to these.

[0159] In this embodiment, the battery cell 21 is assembled within the assembly space of the housing 10, and the bottom wall 111 of the housing 10 has a first surface 1111a in the first direction X for supporting the battery cell 21, so that the bottom wall 111 of the housing 10 serves to support the battery cell 21. Multiple positioning surfaces 1112a connected to the first surface 1111a are provided on the bottom wall 111, with each battery cell 21 corresponding to at least one positioning surface 1112a. The positioning surfaces 1112a face the outer peripheral surface of the corresponding battery cell 21 and extend circumferentially along the corresponding battery cell 21, so that each positioning surface 1112a and the first surface 1111a can jointly define a limiting space for assembling a corresponding battery cell 21. This allows the bottom wall 111 to also limit and position each battery cell 21, thereby reducing the difficulty of assembling multiple cylindrical battery cells 21 into the housing 10, which helps to reduce the assembly difficulty of the battery device 100 and improve the accuracy of assembling multiple cylindrical battery cells 21 into the housing 10. On the other hand, it can reduce the phenomenon of shaking or displacement of multiple cylindrical battery cells 21 during use, which helps to alleviate the collision and bumping between multiple battery cells 21 and between battery cells 21 and other components. This reduces the risk of damage, cracking or even explosion of the cylindrical battery cells 21 during use, thereby improving the stability and reliability of the battery device 100.

[0160] According to some embodiments of this application, see Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the bottom wall 111 may include a plate body 1111 and a limiting portion 1112. The surface of the plate body 1111 facing the assembly space in the first direction X is a first surface 1111a. The limiting portion 1112 protrudes from the first surface 1111a and has a positioning surface 1112a. Along the first direction X, the limiting portion 1112 has a second surface 1112b facing the assembly space, and the positioning surface 1112a connects the first surface 1111a and the second surface 1112b.

[0161] The plate body 1111 is the main part of the bottom wall 111 used to support and assemble the battery cell 21. The side wall 112 of the first box body 11 is a structure that surrounds the plate body 1111 and is connected to the plate body 1111. Correspondingly, the inner surface of the plate body 1111 facing the battery cell 21 in the first direction X is the first surface 1111a. The limiting part 1112 is a protruding structure that protrudes from the first surface 1111a of the plate body 1111. The limiting part 1112 is provided with a hollow area. The hollow area penetrates the limiting part 1112 along the first direction X, so that the limiting part 1112 forms a positioning surface 1112a in multiple sides of the limiting part 1112 where the hollow area penetrates the limiting part 1112. Correspondingly, the inner surface of the limiting part 1112 facing the assembly space on the side away from the plate body 1111 is the second surface 1112b.

[0162] In this embodiment, the bottom wall 111 has a plate body 1111 and a limiting part 1112 protruding from the plate body 1111. By setting the surface of the plate body 1111 facing the assembly space as the first surface 1111a and setting the positioning surface 1112a on the limiting part 1112, the battery cell 21 is placed on the plate body 1111 and at least a portion of the limiting part 1112 is arranged along the circumference of the battery cell 21. This achieves the formation of a first surface 1111a for supporting the battery cell 21 and a positioning surface 1112a for limiting the battery cell 21 on the bottom wall 111. The structure is simple and easy to manufacture.

[0163] According to some embodiments of this application, refer to Figure 5 and Figure 6 Please refer to further details. Figure 9 , Figure 9 for Figure 3 The enlarged view of part C of the first housing body 11 shown. The limiting part 1112 also has a first guide slope 1112c. The positioning surface 1112a and the second surface 1112b are connected by the first guide slope 1112c. The first guide slope 1112c is configured to guide the corresponding battery cell 21 into the inner side of the positioning surface 1112a.

[0164] The second surface 1112b is a surface on the bottom wall 111 that is spaced apart from the first surface 1111a along the first direction X, and the positioning surface 1112a is connected between the first surface 1111a and the second surface 1112b.

[0165] For example, in a cross section parallel to the first direction X, the first surface 1111a is perpendicular to the first direction X, and the positioning surface 1112a is parallel to the first direction X.

[0166] The first guide slope 1112c is a slope connecting the positioning surface 1112a and the second surface 1112b, so that the first guide slope 1112c can play a guiding role in the process of assembling the battery cell 21 into the inner side of the positioning surface 1112a. Correspondingly, in the cross section parallel to the first direction X, the first guide slope 1112c is set at an acute angle with the first direction X. Similarly, the first guide slope 1112c is also an arc-shaped structure extending circumferentially along the corresponding battery cell 21.

[0167] In this embodiment, by providing a first guide slope 1112c on the limiting part 1112, and the first guide slope 1112c having a structure connecting the positioning surface 1112a and the second surface 1112b, the first guide slope 1112c can play a certain guiding role in the process of assembling the battery cell 21 to the inner side of the positioning surface 1112a, thereby reducing the assembly difficulty between the battery cell 21 and the bottom wall 111, and thus improving the assembly efficiency of assembling multiple battery cells 21 into the housing 10.

[0168] According to some embodiments of this application, see Figure 2 , Figure 6 and Figure 8 As shown, along the first direction X, the height of the positioning surface 1112a is H1, and the height of the outer peripheral surface of the battery cell 21 is H2, which satisfies 1 / 4≤H1 / H2≤2 / 3.

[0169] Wherein, H1 is the dimension of the positioning surface 1112a in the first direction X, H2 is the dimension of the outer peripheral surface of the battery cell 21 in the first direction X, and is also the dimension of the outer casing 211 of the battery cell 21 in the first direction X.

[0170] For example, H1 / H2 can be 0.25, 0.26, 0.27, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.6, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, or 2 / 3, etc.

[0171] In this embodiment, the height of the positioning surface 1112a in the first direction X is 1 / 4 to 2 / 3 of the height of the outer peripheral surface of the battery cell 21 in the first direction X. On the one hand, setting the height of the positioning surface 1112a in the first direction X to be greater than or equal to 1 / 4 of the height of the outer peripheral surface of the battery cell 21 in the first direction X is beneficial to improving the limiting effect of the positioning surface 1112a on the battery cell 21, so as to reduce the phenomenon of the battery cell 21 tilting during use. On the other hand, setting the height of the positioning surface 1112a in the first direction X to be less than or equal to 2 / 3 of the height of the outer peripheral surface of the battery cell 21 in the first direction X is beneficial to reducing the space occupied by the positioning surface 1112a, which is beneficial to improving the internal space utilization of the housing 10, and can reduce the difficulty of forming the positioning surface 1112a on the bottom wall 111, thereby reducing the manufacturing difficulty of the housing 10.

[0172] According to some embodiments of this application, refer to Figure 2 and Figure 7 Please refer to further details. Figure 10 , Figure 10 This is an assembly diagram of the first housing body 11 and the thermal management component 30 provided in some embodiments of this application. The perimeter of the battery cell 21 is L1, and the total length of all positioning surfaces 1112a corresponding to the same battery cell 21 in the circumferential direction of the battery cell 21 is L2, which satisfies that L2≥0.5L1.

[0173] Wherein, L1 is the circumference of the circle defined by the orthographic projection of the battery cell 21 in the projection plane perpendicular to the first direction X, and is also the circumference of the circle defined by the orthographic projection of the outer shell 211 of the battery cell 21 in the projection plane perpendicular to the first direction X. L2 is the sum of the lengths of the multiple positioning surfaces 1112a corresponding to the battery cell 21 in the circumferential direction of the battery cell 21.

[0174] For example, L2 can be 0.5 times, 0.51 times, 0.52 times, 0.53 times, 0.54 times, 0.55 times, 0.56 times, 0.57 times, 0.58 times, 0.59 times, 0.6 times, 0.61 times, 0.62 times, 0.63 times, 0.64 times, 0.65 times, 0.66 times, 0.67 times, 0.68 times, 0.69 times, 0.7 times, 0.71 times, 0.72 times, 0.73 times, 0.74 times, 0.75 times, 0.76 times, 0.77 times, 0.78 times, 0.79 times, 0.8 times, 0.85 times, 0.9 times, 0.95 times, or 1 times that of L1.

[0175] It should be noted that in embodiments where the orthographic projections of the positioning surface 1112a and the main body segment 31 in the projection plane perpendicular to the first direction X do not overlap, L2 is typically 0.5 to 0.7 times L1. In embodiments where the orthographic projections of the positioning surface 1112a and the main body segment 31 in the projection plane perpendicular to the first direction X at least partially overlap, L2 can be 0.5 to 1 times L1.

[0176] In this embodiment, by setting the total length of all positioning surfaces 1112a corresponding to the same battery cell 21 in the circumferential direction of the battery cell 21 to be greater than or equal to 0.5 times the circumference of the battery cell 21, the limiting and positioning effect of the limiting surfaces on the battery cell 21 can be improved. This is beneficial to further improve the accuracy of assembling multiple cylindrical battery cells 21 into the housing 10, and can further reduce the phenomenon of shaking or displacement of multiple cylindrical battery cells 21 during use, so as to further alleviate the bumping and collision between multiple battery cells 21 and between battery cells 21 and other components.

[0177] According to some embodiments of this application, in conjunction with Figure 2 , Figure 3 and Figure 9 As shown, the battery device 100 may further include a first adhesive (not shown). At least a portion of the first adhesive is disposed between the first surface 1111a and the battery cell 21, and the first adhesive connects the first surface 1111a and the battery cell 21.

[0178] The first adhesive can be a structural adhesive or a thermally conductive adhesive disposed between the first surface 1111a and the battery cell 21, so as to fix and connect the first surface 1111a and the battery cell 21.

[0179] In this embodiment, by providing a first adhesive between the first surface 1111a and the battery cell 21, the first adhesive can fix the battery cell 21 on the first surface 1111a, which helps to improve the stability of the battery cell 21 assembled in the housing 10.

[0180] In some embodiments, please continue to combine Figure 2 , Figure 3 and Figure 9 As shown, the first adhesive portion is located between the positioning surface 1112a and the outer peripheral surface of the battery cell 21, and the first adhesive connects the positioning surface 1112a and the battery cell 21.

[0181] It should be noted that, in the embodiments of this application, the portion of the first adhesive between the positioning surface 1112a and the outer peripheral surface of the battery cell 21 is the portion of the first adhesive that overflows between the first surface 1111a and the battery cell 21.

[0182] In this embodiment, by setting the first adhesive portion to extend between the positioning surface 1112a and the outer peripheral surface of the battery cell 21, the reliability of the battery cell 21 connected to the first surface 1111a can be further improved, and the stability of the battery cell 21 assembled to the inner side of the positioning surface 1112a can be further improved, thereby further improving the stability of the battery cell 21 assembled in the housing 10, so as to further reduce the risk of shaking or displacement of the battery cell 21 during use.

[0183] According to some embodiments of this application, see Figure 5 , Figure 6 and Figure 9 As shown, the positioning surface 1112a is provided with a plurality of limiting protrusions 1113, and the plurality of limiting protrusions 1113 are arranged at intervals along the circumference of the battery cell 21. The limiting protrusions 1113 abut against the outer peripheral surface of the corresponding battery cell 21, so that the positioning surface 1112a and the outer peripheral surface of the battery cell 21 are spaced apart.

[0184] For example, in Figure 6 In this embodiment, the limiting protrusion 1113 and the limiting part 1112 are integrally formed. Of course, in other embodiments, the limiting protrusion 1113 and the limiting part 1112 can also be separately provided and connected. Correspondingly, the limiting protrusion 1113 can be connected to the positioning surface 1112a by means of adhesive or other structures.

[0185] In this embodiment, by providing multiple limiting protrusions 1113 on the positioning surface 1112a, arranged at intervals along the circumference of the battery cell 21, and the limiting protrusions 1113 having abutting against the corresponding battery cell 21, a structure in which the positioning surface 1112a and the outer peripheral surface of the corresponding battery cell 21 are separated is achieved. On the one hand, this facilitates the application of a first adhesive between the positioning surface 1112a and the corresponding battery cell 21, thereby reducing the assembly difficulty of the battery cell 21. On the other hand, it creates an overflow space between the positioning surface 1112a and the outer peripheral surface of the corresponding battery cell 21, which helps to reduce the difficulty of applying the first adhesive between the first surface 1111a and the battery cell 21.

[0186] In some embodiments, see Figure 6 and Figure 9 As shown, the limiting protrusion 1113 extends along the first direction X. That is, the limiting protrusion 1113 is a strip structure extending along the first direction X.

[0187] In this embodiment, by setting the limiting protrusion 1113 as a structure extending along the first direction X, on the one hand, the obstruction and interference of the limiting protrusion 1113 on the battery cell 21 during the process of inserting the battery cell 21 into the inner side of the positioning surface 1112a can be reduced, thereby reducing the assembly difficulty of the battery cell 21. On the other hand, the obstruction of the limiting protrusion 1113 on the first adhesive overflowing between the first surface 1111a and the battery cell 21 can be reduced, so that the first adhesive can enter between the positioning surface 1112a and the corresponding outer peripheral surface of the battery cell 21.

[0188] In some embodiments, please continue to see Figure 6 and Figure 9 As shown, along the first direction X, a second guide slope 1113a is provided at one end of the limiting protrusion 1113 away from the first surface 1111a. The second guide slope 1113a is configured to guide the corresponding battery cell 21 into the inner side of the positioning surface 1112a.

[0189] The second guide slope 1113a is the end face of the limiting protrusion 1113 away from the first surface 1111a in the first direction X. The second guide slope 1113a can play a guiding role in the process of assembling the battery cell 21 into the inner side of the positioning surface 1112a. Correspondingly, in the cross section parallel to the first direction X, the second guide slope 1113a is set at an acute angle to the first direction X.

[0190] In this embodiment, by providing a second guide slope 1113a at the end of the limiting protrusion 1113 away from the first surface 1111a, the second guide slope 1113a can play a certain guiding role in the process of assembling the battery cell 21 to the inner side of the positioning surface 1112a, thereby reducing the obstruction and interference of the limiting protrusion 1113 on the battery cell 21, and reducing the assembly difficulty between the battery cell 21 and the bottom wall 111, so as to improve the assembly efficiency of assembling multiple battery cells 21 into the housing 10.

[0191] According to some embodiments of this application, please refer to Figure 6 and Figure 9 As shown, the bottom wall 111 also has a first guide slope 1112c, which is connected to the end of the positioning surface 1112a away from the first surface 1111a in the first direction X. The first guide slope 1112c is configured to guide the corresponding battery cell 21 into the inner side of the positioning surface 1112a. The first guide slope 1112c is connected to the second guide slope 1113a.

[0192] The first guide slope 1112c and the second guide slope 1113a are directly connected. That is, the end of the first guide slope 1112c that is close to the first surface 1111a in the first direction X is connected to the end of the second guide slope 1113a that is away from the first surface 1111a in the first direction X.

[0193] In this embodiment, by setting the first guide slope 1112c connected to the positioning surface 1112a away from the first surface 1111a and the second guide slope 1113a connected to the limiting protrusion 1113 away from the first surface 1111a as an interconnected structure, it is convenient for the battery cell 21 to be assembled into the inner side of the multiple limiting protrusions 1113 in sequence under the guidance of the first guide slope 1112c and the second guide slope 1113a, thereby further reducing the assembly difficulty between the battery cell 21 and the bottom wall 111.

[0194] In some embodiments, see Figure 6 As shown, within the same cross section parallel to the first direction X, the angle between the first guide slope 1112c and the first direction X is equal to the angle between the second guide slope 1113a and the first direction X. That is, within the same cross section parallel to the first direction X, the first guide slope 1112c and the second guide slope 1113a are parallel and connected structures.

[0195] In this embodiment, within the same cross section parallel to the first direction X, by setting the angle between the first guide slope 1112c and the first direction X to be equal to the angle between the second guide slope 1113a and the first direction X, the first guide slope 1112c and the second guide slope 1113a are made to be similarly coplanar. This allows for a smooth transition at the connection point between the first guide slope 1112c and the second guide slope 1113a. This reduces the likelihood of the battery cell 21 being bumped or stuck during the process of the first guide slope 1112c guiding the battery cell 21 onto the second guide slope 1113a, further reducing the assembly difficulty between the battery cell 21 and the bottom wall 111.

[0196] According to some embodiments of this application, refer to Figure 2 and Figure 10 Please refer to further details. Figure 11 and Figure 12 , Figure 11 This is a schematic diagram of the structure of the thermal management component 30 provided in some embodiments of this application. Figure 12This is an assembly schematic diagram of the main body segment 31 of the battery cell 21 and the thermal management component 30 provided in some embodiments of this application. The battery device 100 may also include the thermal management component 30. The thermal management component 30 is disposed within the housing 10 and is configured to exchange heat with the battery cell 21. The thermal management component 30 includes a main body segment 31 located along a first direction X on the side of the battery cell 21 facing the first surface 1111a, and in a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of each battery cell 21 overlaps with a portion of the orthographic projection of the main body segment 31.

[0197] The thermal management component 30 is disposed inside the housing 10 and is used to contain the heat exchange medium, thereby enabling heat exchange with the battery cell 21 to manage the temperature of the battery cell 21.

[0198] The thermal management component 30 includes a main body segment 31 located along the first direction X on the side of the battery cell 21 facing the first surface 1111a. That is, the thermal management component 30 has a main body segment 31 for heat exchange with the battery cell 21, and the main body segment 31 is located on the side of the battery cell 21 facing the first surface 1111a of the bottom wall 111 in the first direction X, such that the main body segment 31 is located at the bottom of the battery cell 21 in the first direction X.

[0199] For example, in Figure 3 and Figure 4 In the first surface 1111a, a mounting groove 1111b may be provided. Along the first direction X, at least a portion of the main body segment 31 of the thermal management component 30 is disposed in the mounting groove 1111b. That is, the first surface 1111a of the bottom wall 111, which supports the battery cell 21, is recessed in the first direction X in a direction away from the battery cell 21 to form the mounting groove 1111b, and at least a portion of the main body segment 31 of the thermal management component 30 is inserted into the mounting groove 1111b in the first direction X.

[0200] Combination Figure 11 and Figure 12 As shown, in a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of each battery cell 21 overlaps with at least a portion of the orthographic projection of at least one main body segment 31. That is, each battery cell 21 is disposed corresponding to at least a portion of at least one main body segment 31 in the first direction X, such that each battery cell 21 has a structure that covers at least a portion of at least one main body segment 31 in the first direction X.

[0201] For example, in the embodiments of this application, see Figure 11As shown, a first flow channel (not shown) for the flow of heat exchange medium is formed within the main body section 31 of the thermal management component 30 to achieve heat exchange with the battery cell 21. Correspondingly, the heat exchange medium can be a gas, such as air or hydrogen, or a liquid, such as water, salt water solution, or liquid nitrogen. Of course, in other embodiments, the main body section 31 of the thermal management component 30 can also be a structure with a cavity formed inside to accommodate the heat exchange medium, so as to achieve heat exchange with the battery cell 21. Correspondingly, the heat exchange medium can also be a solid, such as paraffin wax. The heat exchange function can be achieved through the change of the state of the heat exchange medium. For example, when paraffin wax changes from solid to liquid, it can absorb heat to achieve the effect of cooling the battery cell 21.

[0202] In this embodiment, a thermal management component 30 is further provided inside the housing 10 of the battery device 100. The thermal management component 30 has a main body segment 31 that exchanges heat with the battery cell 21. By placing the main body segment 31 of the thermal management component 30 on the side of the battery cell 21 facing the first surface 1111a in the first direction X, and in a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of each battery cell 21 overlaps with at least a portion of the orthographic projection of at least one main body segment 31, the cylindrical battery cell 21 has a bottom heat exchange structure inside the housing 10, and at least a portion of each battery cell 21 interacts with the thermal management component. The main body segment 31 of 30 is correspondingly arranged, so that the battery device 100 with this structure can realize that the thermal management component 30 can exchange heat with each battery cell 21, while also reducing the assembly difficulty between the thermal management component 30 and the cylindrical battery cell 21, and reducing the phenomenon that the thermal management component 30 occupies the space between multiple battery cells 21. This is conducive to optimizing the internal space layout of the battery device 100 and improving the internal space utilization of the battery device 100. In this way, while taking into account the heat exchange effect between the thermal management component 30 and the battery cell 21, the assembly efficiency and energy density of the battery device 100 can be effectively improved.

[0203] According to some embodiments of this application, in conjunction with Figure 2 and Figure 12 As shown, the battery device 100 includes a plurality of battery cell groups 20 arranged along a second direction Y, and each battery cell group 20 includes a plurality of battery cells 21 arranged along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The thermal management component 30 includes a plurality of main body segments 31 arranged at intervals along the second direction Y, and the main body segments 31 extend along the third direction Z. In a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of each battery cell group 20 overlaps with at least a portion of the orthographic projection of at least one main body segment 31.

[0204] The battery device 100 may include multiple battery cell groups 20 arranged along the second direction Y. Each battery cell group 20 includes multiple battery cells 21 arranged along the third direction Z. That is, the multiple battery cells 21 arranged in the housing 10 of the battery device 100 are arranged in the second direction Y and the third direction Z. In other words, the housing 10 is provided with multiple rows of battery cells 21 arranged along the second direction Y. Each row of battery cells 21 includes multiple battery cells 21 arranged along the third direction Z. Correspondingly, each row of battery cells 21 is a battery cell group 20.

[0205] The thermal management component 30 includes a plurality of main body segments 31 arranged at intervals along the second direction Y, and the main body segments 31 extend along the third direction Z. That is, the thermal management component 30 is also provided with a plurality of main body segments 31. Each main body segment 31 is a strip structure extending along the third direction Z, and the plurality of main body segments 31 are arranged at intervals along the second direction Y. Correspondingly, the arrangement direction of the plurality of main body segments 31 is the same as the arrangement direction of the plurality of battery cell groups 20, and the extension direction of the main body segments 31 is the same as the arrangement direction of the plurality of battery cells 21 in the battery cell group 20.

[0206] In a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of each battery cell group 20 overlaps with at least a portion of the orthographic projection of at least one main body segment 31. That is, along the first direction X, each battery cell group 20 is correspondingly arranged with at least one main body segment 31, i.e., each row of battery cells 21 is correspondingly arranged with at least one main body segment 31 in the first direction X.

[0207] For example, in Figure 12 In the first direction X, each battery cell group 20 is correspondingly set with one main body segment 31, and each main body segment 31 is correspondingly set with two battery cell groups 20. Of course, in other embodiments, each battery cell group 20 may also be correspondingly set with two or three equal main body segments 31 in the first direction X.

[0208] In this embodiment, the battery device 100 includes a plurality of battery cell groups 20 arranged along the second direction Y, and each battery cell group 20 includes a plurality of battery cells 21 arranged along the third direction Z, such that the plurality of battery cells 21 of the battery device 100 are arranged in an arranged manner within the housing 10. The thermal management component 30 is configured to include a plurality of main body segments 31 arranged at intervals along the second direction Y, and each main body segment 31 extends along the third direction Z, such that the arrangement direction of the plurality of main body segments 31 is the same as the arrangement direction of the plurality of battery cell groups 20. Furthermore, the extension direction of the main body segment 31 is the same as the arrangement direction of the plurality of battery cells 21 in each battery cell group 20, which facilitates the corresponding arrangement of each main body segment 31 and at least one battery cell group 20 in the first direction X, so as to achieve a structure in which at least a portion of the orthographic projection of each battery cell 21 in the projection plane perpendicular to the first direction X overlaps with at least a portion of the orthographic projection of at least one main body segment 31. This is beneficial to further reduce the assembly difficulty between the thermal management component 30 and the plurality of battery cells 21, and facilitates heat exchange between the thermal management component 30 and each battery cell 21.

[0209] In some embodiments, see Figure 12 As shown, the battery device 100 may include multiple pairs of battery cell groups 20 arranged along the second direction Y, and each pair of battery cell groups 20 includes two battery cell groups 20. A main body segment 31 is correspondingly provided on each of the two battery cell groups 20 in the first direction X.

[0210] The battery device 100 includes multiple pairs of battery cell groups 20 that can be arranged along the second direction Y. Each pair of battery cell groups 20 includes two battery cell groups 20. That is, the multiple battery cell groups 20 inside the housing 10 are divided into multiple pairs of battery cell groups 20. In the second direction Y, every two battery cell groups 20 form a pair of battery cell groups 20, so that the multiple pairs of battery cell groups 20 are also arranged along the second direction Y, and each pair of battery cell groups 20 includes two battery cell groups 20. That is, every two rows of battery cells 21 in the second direction Y form a pair of battery cell groups 20. For example, if four battery cells are installed inside the housing 10... The battery cell group 20, that is, four battery cell groups 20 form two pairs of battery cell groups 20 arranged along the second direction Y, each pair of battery cell groups 20 includes two battery cell groups 20. If the housing 10 is equipped with six battery cell groups 20, that is, six battery cell groups 20 form three pairs of battery cell groups 20 arranged along the second direction Y, each pair of battery cell groups 20 includes two battery cell groups 20. If the housing 10 is equipped with eight battery cell groups 20, that is, eight battery cell groups 20 form four pairs of battery cell groups 20 arranged along the second direction Y, each pair of battery cell groups 20 includes two battery cell groups 20, and so on.

[0211] In each pair of battery cell groups 20, two battery cell groups 20 are respectively provided with a main body segment 31 in the first direction X. That is, each main body segment 31 is provided with a pair of battery cell groups 20. In other words, every two rows of battery cells 21 in the second direction Y are respectively provided with a main body segment 31 in the first direction X, so that each battery cell group 20 is provided with only one main body segment 31 in the first direction X, and each main body segment 31 is provided with two battery cell groups 20 in the first direction X.

[0212] In this embodiment, by setting a main body segment 31 for each pair of battery cell groups 20 in the housing 10, it is possible to ensure that each battery cell group 20 is provided with a main body segment 31 while reducing the number of main body segments 31 of the thermal management component 30 arranged in the second direction Y. On the one hand, it can reduce the manufacturing and assembly difficulty of the thermal management component 30, and on the other hand, it can optimize the internal space layout of the housing 10 and save the space occupied by the thermal management component 30.

[0213] Of course, the structure of the battery device 100 is not limited to this. In some embodiments, the battery device 100 can also have other structures, for example, see reference. Figure 13 , Figure 13 This is an assembly diagram of the main body segment 31 of the battery cell 21 and the thermal management component 30 provided in some embodiments of this application. Each battery cell group 20 is provided with one main body segment 31 in the first direction X. That is, the battery cell group 20 and the main body segment 31 are arranged in a one-to-one correspondence in the first direction X, such that each battery cell group 20 is provided with only one main body segment 31 in the first direction X, and each main body segment 31 is provided with only one battery cell group 20 in the first direction X.

[0214] In this embodiment, by setting each battery cell group 20 to have a corresponding main body segment 31 in the first direction X, each battery cell group 20 is a structure that exchanges heat with the corresponding main body segment 31, thereby reducing the mutual influence of multiple battery cell groups 20 when exchanging heat with the corresponding main body segment 31, which is beneficial to improving the heat exchange effect between the thermal management component 30 and the battery cell 21.

[0215] Similarly, the battery device 100 can also have other structures, for example, see reference. Figure 14 As shown, Figure 14This is a schematic diagram of the assembly of the main body segment 31 of the battery cell 21 and the thermal management component 30 provided in some embodiments of this application. Each pair of adjacent battery cell groups 20 is provided with one main body segment 31 in the first direction X. That is, in the second direction Y, the gap formed between each pair of adjacent battery cell groups 20 is provided with one main body segment 31, such that each main body segment 31 is provided with two battery cell groups 20 in the first direction X, and the two battery cell groups 20 located on both sides in the second direction Y are provided with only one main body segment 31 in the first direction X, while the other battery cell groups 20 are provided with two main body segments 31 in the first direction X.

[0216] In this embodiment, by setting each pair of adjacent battery cell groups 20 to a structure in which a main body segment 31 is set in the first direction X, each pair of adjacent battery cell groups 20 can share a main body segment 31, and each battery cell group 20 is set in a structure corresponding to the two adjacent main body segments 31, thereby optimizing the spatial layout inside the housing 10 and improving the heat exchange effect between the thermal management component 30 and the battery cell 21.

[0217] According to some embodiments of this application, refer to Figure 11 Please refer to further details. Figure 15 , Figure 15 This is a front view of a thermal management component 30 provided in some embodiments of this application in a first direction X. A first flow channel (not shown) for accommodating a heat exchange medium is formed inside the main body segment 31. The thermal management component 30 may also include a plurality of connecting segments 32, each of which has a second flow channel (not shown) for accommodating a heat exchange medium. Each pair of adjacent main body segments 31 is connected by a connecting segment 32, and in three adjacent main body segments 31, the two ends of the middle main body segment 31 are connected to two connecting segments 32 respectively, thereby connecting the first flow channel and the second flow channel.

[0218] In this configuration, each pair of adjacent main sections 31 is connected by a connecting section 32. In the three adjacent main sections 31, the two ends of the middle main section 31 are connected to the two connecting sections 32 respectively. In other words, the multiple main sections 31 are connected end to end by multiple connecting sections 32, so that the first flow channels of the multiple main sections 31 are connected in sequence, and the heat exchange medium passes through the multiple main sections 31 in sequence in its flow direction.

[0219] In this embodiment, the thermal management component 30 is further provided with a plurality of connecting segments 32. By setting each pair of adjacent main body segments 31 in the second direction Y to be connected by a connecting segment 32, and setting the two ends of the middle main body segment 31 in the three adjacent main body segments 31 to be connected to two connecting segments 32 respectively, the first flow channel of the plurality of main body segments 31 of the thermal management component 30 is connected end to end by the second flow channel of the plurality of connecting segments 32 to form a structure in which the plurality of main body segments 31 are connected in series. The thermal management component 30 with this structure can reduce the molding difficulty of the plurality of main body segments 31 and is conducive to improving the manufacturing efficiency of the thermal management component 30.

[0220] Of course, the structure of the thermal management component 30 is not limited to this. In some embodiments, the thermal management component 30 can also have other structures, for example, see reference. Figure 16 As shown, Figure 16 This is a front view of a thermal management component 30 provided in some other embodiments of this application in a first direction X. A first flow channel for receiving heat exchange medium is formed inside the main body segment 31. The thermal management component 30 also includes a first delivery pipe 33 and a second delivery pipe 34. One end of each of the multiple main body segments 31 is connected to the first delivery pipe 33, and the other end is connected to the second delivery pipe 34 to connect the first flow channel, the first delivery pipe 33, and the second delivery pipe 34.

[0221] In this configuration, one end of each of the multiple main sections 31 is connected to the first conveying pipe 33, and the other end is connected to the second conveying pipe 34. In other words, one end of the first flow channel of the multiple main sections 31 is connected through a first conveying pipe 33, and the other end of the first flow channel of the multiple main sections 31 is connected through a second conveying pipe 34, so that the heat exchange medium enters from the first conveying pipe 33 into the first flow channel of each main section 31 and then flows into the second conveying pipe 34.

[0222] In this embodiment, the thermal management component 30 is further provided with a first conveying pipe 33 and a second conveying pipe 34. By setting one end of each of the multiple main body segments 31 to be connected to the first conveying pipe 33 and the other end to be connected to the second conveying pipe 34, the first flow channels of the multiple main body segments 31 are interconnected through the first conveying pipe 33 and the second conveying pipe 34 to form a structure in which multiple main body segments 31 are connected in parallel. The thermal management component 30 with this structure can reduce the mutual influence of the heat exchange medium in the first flow channels of the multiple main body segments 31, which is beneficial to alleviate the phenomenon of excessive temperature difference between the multiple main body segments 31. This can effectively improve the heat exchange balance between the multiple main body segments 31 of the thermal management component 30 and different battery cell groups 20, and thus improve the heat exchange effect between the thermal management component 30 and the multiple battery cells 21.

[0223] According to some embodiments of this application, see Figure 3 , Figure 4 and Figure 10 As shown, the positioning surface 1112a is spaced at both ends of the corresponding battery cell 21 in the circumferential direction, and the orthographic projection of the positioning surface 1112a and the orthographic projection of the main body segment 31 do not overlap in the projection plane perpendicular to the first direction X.

[0224] The positioning surface 1112a is spaced at both ends of the corresponding battery cell 21 in the circumferential direction, that is, the positioning surface 1112a is an arc-shaped structure that extends along the circumferential direction of the corresponding battery cell 21 and is not connected at the beginning and end.

[0225] In the projection plane perpendicular to the first direction X, the orthographic projection of the positioning surface 1112a and the orthographic projection of the main body segment 31 do not overlap. That is to say, the positioning surface 1112a and the main body segment 31 are misaligned in the first direction X, so that the main body segment 31 does not cover the positioning surface 1112a in the first direction X.

[0226] It should be noted that in the embodiment where the orthographic projections of the positioning surface 1112a and the main body segment 31 in the projection plane perpendicular to the first direction X do not overlap, the positioning surface 1112a is a structure that is truncated at the position of the main body segment 31 in the first direction X, so that the positioning surface 1112a is an arc-shaped structure with no connection at the beginning and end.

[0227] If it is Figure 12 In the arrangement of the main body segment 31 and the battery cell group 20 shown, the battery cell 21 can be a structure that corresponds one-to-one with the positioning surface 1112a. Figure 13 In the arrangement of the main body segment 31 and the battery cell group 20 shown, each battery cell 21 is a structure corresponding to two positioning surfaces 1112a. Figure 14 In the arrangement of the main body segment 31 and the battery cell group 20 shown, some battery cells 21 are arranged in a one-to-one correspondence with the positioning surface 1112a, and some battery cells 21 are arranged in a correspondence with two positioning surfaces 1112a.

[0228] In this embodiment, by setting the positioning surface 1112a at two spaced ends on the circumferential direction of the corresponding battery cell 21, the positioning surface 1112a is an arc-shaped structure extending along the circumferential direction of the corresponding battery cell 21 and not connected end to end. Furthermore, the orthographic projection of the positioning surface 1112a and the orthographic projection of the main body segment 31 in the projection plane perpendicular to the first direction X are set to not overlap, so that the main body segment 31 of the thermal management component 30 is not set on the positioning surface 1112a in the first direction X. This reduces the interference between the main body segment 31 and the positioning surface 1112a during the assembly of the main body segment 31 to the side of the battery cell 21 facing the first surface 1111a, which helps to reduce the assembly difficulty of the main body segment 31 of the thermal management component 30.

[0229] According to some embodiments of this application, in conjunction with Figure 10 , Figure 11 and Figure 12 As shown, the thermal management component 30 may include a plurality of main body segments 31 arranged at intervals along the second direction Y, and the main body segments 31 extend along the third direction Z, with the first direction X, the second direction Y, and the third direction Z being perpendicular to each other. Along the second direction Y, a positioning surface 1112a is provided between each pair of adjacent main body segments 31.

[0230] Along the second direction Y, a positioning surface 1112a is provided between each pair of adjacent main body segments 31. That is, the multiple positioning surfaces 1112a formed on the bottom wall 111 are a structure separated by multiple main body segments 31 in the second direction Y, so that a positioning surface 1112a is provided between each pair of adjacent main body segments 31.

[0231] In this embodiment, by providing a positioning surface 1112a between each pair of adjacent main body segments 31 in the second direction Y, a battery cell 21 is provided between each pair of adjacent main body segments 31. The battery cells 21 provided between the adjacent main body segments 31 are positioned and limited by the positioning surface 1112a, thereby improving the assembly accuracy between the battery cell 21 and the main body segment 31 and improving the stability of heat exchange between the main body segment 31 and the battery cell 21.

[0232] In some embodiments, see Figure 10 As shown, each main body segment 31 has a positioning surface 1112a on both sides in the second direction Y, and the positioning surfaces 1112a on both sides of the same main body segment 31 are positioned opposite each other in the second direction Y.

[0233] In this embodiment, by providing positioning surfaces 1112a on both sides of each main body segment 31 along the second direction Y, and the positioning surfaces 1112a on both sides of the main body segment 31 being arranged opposite to each other in the second direction Y, it is convenient to assemble battery cells 21 on both sides of the main body segment 31, and the assembly difficulty between the battery cells 21 and the bottom wall 111 can be reduced.

[0234] According to some embodiments of this application, see Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 10 As shown, the bottom wall 111 may include a plate body 1111 and a limiting part 1112. The plate body 1111 has a first surface 1111a, the limiting part 1112 protrudes from the first surface 1111a, and the limiting part 1112 has a positioning surface 1112a. Along the first direction X, the limiting part 1112 has a second surface 1112b facing the assembly space, and the positioning surface 1112a connects the first surface 1111a and the second surface 1112b. In a projection plane perpendicular to the first direction X, the orthographic projection of the limiting part 1112 does not overlap with the orthographic projection of the main body segment 31.

[0235] The plate body 1111 is the main part of the bottom wall 111 used to support and assemble the battery cell 21. The side wall 112 of the first box body 11 is a structure that surrounds the plate body 1111 and is connected to the plate body 1111. Correspondingly, the inner surface of the plate body 1111 facing the battery cell 21 in the first direction X is the first surface 1111a. The limiting part 1112 is a protruding structure that protrudes from the first surface 1111a of the plate body 1111. The limiting part 1112 is provided with a hollow area. The hollow area penetrates the limiting part 1112 along the first direction X, so that the limiting part 1112 forms a positioning surface 1112a in multiple sides of the limiting part 1112 where the hollow area penetrates the limiting part 1112. Correspondingly, the inner surface of the limiting part 1112 facing the assembly space on the side away from the plate body 1111 is the second surface 1112b.

[0236] In the projection plane perpendicular to the first direction X, the orthographic projection of the limiting part 1112 does not overlap with the orthographic projection of the main body segment 31. That is, the limiting part 1112 does not cover the main body segment 31 in the first direction X, so that the main body segment 31 is also a structure with a partial hollow area corresponding to the limiting part 1112, so that a part of the hollow area of ​​the limiting part 1112 is used for inserting and assembling the battery cell 21, and another part of the hollow area is used to avoid the main body segment 31.

[0237] In this embodiment, by setting the orthographic projections of the limiting part 1112 and the main body segment 31 in the projection plane perpendicular to the first direction X as non-overlapping structures, the interference between the limiting part 1112 and the main body segment 31 can be reduced. This helps to reduce the difficulty of setting the main body segment 31 on the side of the battery cell 21 facing the first surface 1111a, thereby reducing the difficulty of assembling the thermal management component 30 into the housing 10.

[0238] In some embodiments, see Figure 5 and Figure 6 As shown, the plate body 1111 and the limiting part 1112 are integrally formed. That is to say, the plate body 1111 and the limiting part 1112 of the bottom wall 111 are structures made by an integral forming process. For example, if the bottom wall 111 is made of metal, it can be formed by casting or stamping. If the bottom wall 111 is made of non-metallic polymer material, it can be formed by injection molding.

[0239] For example, in the embodiments of this application, the first box body 11 is an injection molded part, which can reduce the manufacturing difficulty and molding difficulty of the integrally molded plate body 1111 and the limiting part 1112, and reduce the processing difficulty of the positioning surface 1112a.

[0240] In this embodiment, by setting the plate body 1111 and the limiting part 1112 of the bottom wall 111 as an integrally formed structure, it is beneficial to improve the connection between the plate body 1111 and the limiting part 1112, thereby improving the stability and reliability of the positioning surface 1112a in positioning and limiting the battery cell 21.

[0241] Of course, in other embodiments, the bottom wall 111 can also be other structures. For example, the plate body 1111 and the limiting part 1112 are separately provided and connected. That is, the plate body 1111 and the limiting part 1112 of the bottom wall 111 are two independent components, and the limiting part 1112 is a structure connected to the first surface 1111a of the plate body 1111. For example, the limiting part 1112 can be connected to the plate body 1111 by adhesive or other structures. If the plate body 1111 and the limiting part 1112 are made of metal, the limiting part 1112 can also be connected to the plate body 1111 by welding or other structures. If the plate body 1111 and the limiting part 1112 are made of non-metallic polymer material, the limiting part 1112 can also be connected to the plate body 1111 by hot melt connection or other structures.

[0242] In this embodiment, by setting the plate body 1111 and the limiting part 1112 as separate but connected structures, it is easier to form the first surface 1111a and the positioning surface 1112a on the bottom wall 111, which helps to reduce the manufacturing difficulty of the bottom wall 111 and makes it easier to set the main body segment 31 of the thermal management component 30 on the side of the battery cell 21 facing the first surface 1111a, which helps to reduce the assembly difficulty of the thermal management component 30.

[0243] It should be noted that the structure of the battery device 100 is not limited to this. In some embodiments, the battery device 100 can also have other structures. For example, the positioning surface 1112a and the main body segment 31 are arranged along the first direction X, and in a projection plane perpendicular to the first direction X, at least a portion of the orthographic projection of the positioning surface 1112a overlaps with at least a portion of the orthographic projection of the main body segment 31. That is, the positioning surface 1112a formed on the bottom wall 111 and the main body segment 31 of the thermal management component 30 are arranged in a stacked manner in the first direction X, and the main body segment 31 is located on the side of the positioning surface 1112a closer to the first surface 1111a in the first direction X, so that the main body segment 31 is a structure that covers at least a portion of the positioning surface 1112a in the first direction X.

[0244] In this embodiment, the positioning surface 1112a can have various structures. For example, the positioning surface 1112a can be an annular structure surrounding the corresponding battery cell 21, or it can be an arc-shaped structure that extends circumferentially along the corresponding battery cell 21 and is not connected end to end.

[0245] In this embodiment, by setting the positioning surface 1112a and the main body segment 31 to be arranged along the first direction X, and setting the orthographic projection of the positioning surface 1112a and the main body segment 31 in the projection plane perpendicular to the first direction X to be at least partially overlapping, the extension dimension of the positioning surface 1112a in the circumferential direction of the corresponding battery cell 21 will not be affected by the main body segment 31. This is beneficial to increase the extension dimension of the positioning surface 1112a in the circumferential direction of the corresponding battery cell 21, so as to improve the limiting and positioning effect of the positioning surface 1112a on the battery cell 21.

[0246] In an embodiment where the positioning surface 1112a and the main body segment 31 at least partially overlap in the orthographic projection in a projection plane perpendicular to the first direction X, the positioning surface 1112a can be an annular structure extending circumferentially along the corresponding battery cell 21. That is, each battery cell 21 is provided with a corresponding positioning surface 1112a, such that the positioning surface 1112a and the first surface 1111a together define a slot structure for inserting the battery cell 21.

[0247] In this embodiment, by setting the positioning surface 1112a as an annular structure extending circumferentially along the corresponding battery cell 21, the positioning surface 1112a is a structure surrounding the periphery of the corresponding battery cell 21. This further enhances the limiting and positioning effect of the positioning surface 1112a on the battery cell 21, thereby further reducing the phenomenon of shaking or displacement of multiple battery cells 21 in the cylindrical structure during use. This is beneficial to further alleviate the bumping and collision between multiple battery cells 21 and between the battery cell 21 and other components, and further reduces the risk of damage, cracking or even explosion of the cylindrical battery cell 21 during use.

[0248] In an embodiment where the positioning surface 1112a and the main body segment 31 at least partially overlap in their orthographic projections in a projection plane perpendicular to the first direction X, the bottom wall 111 may include a plate body 1111 and a limiting portion 1112. The plate body 1111 has a first surface 1111a, the limiting portion 1112 protrudes from the first surface 1111a, and the limiting portion 1112 has a positioning surface 1112a. Along the first direction X, the limiting portion 1112 has a second surface 1112b facing the assembly space, and the positioning surface 1112a connects the first surface 1111a and the second surface 1112b. Along the first direction X, the main body segment 31 is located on the side of the limiting portion 1112 facing the plate body 1111. Correspondingly, the limiting portion 1112 and the main body segment 31 are arranged in a stacked configuration along the first direction X, and the main body segment 31 is located on the side of the limiting portion 1112 facing the plate body 1111 in the first direction X.

[0249] It should be noted that in this embodiment, the plate body 1111 and the limiting part 1112 can be separate structures. In this case, the main body segment 31 can be assembled onto the plate body 1111 first, and then the limiting part 1112 can be assembled onto the plate body 1111. Of course, the plate body 1111 and the limiting part 1112 can also be integrally formed. Correspondingly, an assembly hole or channel for inserting the main body segment 31 can be provided in the area of ​​the plate body 1111 where the limiting part 1112 does not protrude, so that the main body segment 31 can be inserted into the side of the limiting part 1112 facing the plate body 1111.

[0250] In this embodiment, by setting the main body segment 31 of the thermal management component 30 to a structure located on the side of the limiting portion 1112 facing the plate body 1111 in the first direction X, the main body segment 31 and the positioning surface 1112a are arranged along the first direction X, thereby facilitating the realization that the extension dimension of the positioning surface 1112a in the circumferential direction of the corresponding battery cell 21 is not affected by the main body segment 31.

[0251] In an embodiment where the positioning surface 1112a and the main body segment 31 at least partially overlap in the orthographic projection in a projection plane perpendicular to the first direction X, the plate body 1111 and the limiting part 1112 are separately disposed and connected.

[0252] In this embodiment, by setting the plate body 1111 and the limiting part 1112 as separate but connected structures, the main body segment 31 can be assembled onto the plate body 1111 first, and then the limiting part 1112 can be assembled and connected to the plate body 1111. This reduces the difficulty of setting the main body segment 31 to be located on the side of the limiting part 1112 facing the plate body 1111, thereby reducing the assembly difficulty of the thermal management component 30 and optimizing the assembly process of the battery device 100 to improve the production efficiency of the battery device 100.

[0253] According to some embodiments of this application, see Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 9 As shown, the first surface 1111a is provided with a mounting groove 1111b, and at least a portion of the main body segment 31 is disposed within the mounting groove 1111b.

[0254] The mounting groove 1111b is a structure that is recessed on the first surface 1111a of the bottom wall 111 and in the direction away from the battery cell 21, so that the mounting groove 1111b can serve to assemble the main body segment 31, thereby facilitating the setting of the main body segment 31 on the side of the battery cell 21 facing the first surface 1111a, and facilitating the setting of the battery cell 21 and the main body segment 31 in a stacked structure along the first direction X.

[0255] In the embodiment where the bottom wall 111 includes a plate body 1111 and a limiting part 1112, the mounting groove 1111b is disposed on the plate body 1111. The plate body 1111 is located on the side opposite to the battery cell 21 in the first direction X, and a protrusion 1111c is formed at the position corresponding to the mounting groove 1111b. If the plate body 1111 is made of metal, the mounting groove 1111b can be a stamped structure. If the plate body 1111 is made of non-metallic polymer material, the mounting groove 1111b can be a structure formed by injection molding of the plate body 1111. In this structure, it is not necessary to make the overall thickness of the plate body 1111 thick to achieve the mounting groove 1111b on the first surface 1111a of the plate body 1111 facing the battery cell 21.

[0256] In this embodiment, by providing a mounting groove 1111b on the first surface 1111a of the bottom wall 111 for supporting the battery cell 21, and by providing at least a portion of the main body segment 31 of the thermal management component 30 along the first direction X within the mounting groove 1111b, the mounting groove 1111b can provide a certain limiting and positioning function for the main body segment 31 of the thermal management component 30, thereby improving the stability and reliability of the main body segment 31 assembled into the housing 10, and reducing the risk of displacement or shaking of the main body segment 31 during use. Furthermore, the mounting groove 1111b... 1b can provide some protection for the main body section 31, which helps to reduce wear and tear and impacts on the main body section 31 during use. On the other hand, it can also enable the bottom wall 111 and the main body section 31 to share some space in the first direction X, so as to reduce the space occupied by the thermal management component 30 in the housing 10 for assembling the battery cell 21. It can also optimize the internal spatial layout of the battery device 100 and reduce the assembly interference between the thermal management component 30 and the battery cell 21, thereby effectively improving the energy density of the battery device 100 and reducing the assembly difficulty of the battery device 100.

[0257] In some embodiments, combined with Figure 6 and Figure 10 As shown, along the first direction X, the main body segment 31 does not protrude from the first surface 1111a, that is, the main body segment 31 is a structure that is entirely accommodated in the mounting groove 1111b along the first direction X.

[0258] In this embodiment, by setting the main body segment 31 of the thermal management component 30 to not extend beyond the first surface 1111a in the first direction X, the main body segment 31 is located entirely within the mounting groove 1111b in the first direction X. This further enhances the protective effect of the mounting groove 1111b on the main body segment 31, which helps to further reduce wear and impact on the main body segment 31 during use. It also further reduces the space occupied by the thermal management component 30 within the housing 10 for assembling the battery cell 21, which helps to further optimize the internal spatial layout of the battery device 100 and reduce the assembly interference between the thermal management component 30 and the battery cell 21.

[0259] In some embodiments, please continue to combine Figure 6 and Figure 10 As shown, the battery device 100 may further include a second adhesive (not shown in the figure), at least a portion of which is disposed between the main body segment 31 and the bottom surface of the mounting groove 1111b, and the second adhesive connects the main body segment 31 and the bottom surface of the mounting groove 1111b.

[0260] The second adhesive serves to fix the main body segment 31 within the mounting groove 1111b. Correspondingly, the second adhesive can be a structural adhesive, etc.

[0261] In this embodiment, by providing a second adhesive between the main body segment 31 and the bottom surface of the mounting groove 1111b, the second adhesive can fix the main body segment 31 in the mounting groove 1111b, which helps to improve the stability of the main body segment 31 of the thermal management component 30 assembled in the mounting groove 1111b.

[0262] In some embodiments, see Figure 2 As shown, the battery device 100 may further include a third adhesive (not shown in the figure), at least a portion of which is disposed between the main body segment 31 and the battery cell 21, and the third adhesive connects the main body segment 31 and the battery cell 21.

[0263] The third adhesive serves to fix the main body segment 31 and the battery cell 21 together. For example, the third adhesive is a thermally conductive adhesive, which can fix the main body segment 31 and the battery cell 21 together, and also allow heat transfer between the main body segment 31 and the battery cell 21.

[0264] It should be noted that in the embodiment where the main body segment 31 is disposed in the mounting groove 1111b of the first surface 1111a and the main body segment 31 does not protrude from the first surface 1111a along the first direction X, the third adhesive can also fill the gap between the battery cell 21 and the main body segment 31 to improve the assembly stability of the battery cell 21 and the main body segment 31.

[0265] In this embodiment, by providing a third adhesive between the main body segment 31 and the battery cell 21, the third adhesive can fix the battery cell 21 and the main body segment 31 into a whole, thereby reducing the relative displacement between the battery cell 21 and the main body segment 31 during the use of the battery device 100, so as to improve the heat exchange effect between the main body segment 31 and the battery cell 21.

[0266] According to some embodiments of this application, see Figure 3 As shown, the bottom wall 111 is made of insulating material.

[0267] For example, the material of the bottom wall 111 may include at least one of polypropylene, polyamide, polyphenylene ether, polybutylene terephthalate or polyethylene terephthalate. Correspondingly, the material of the side wall 112 may be the same as that of the bottom wall 111. Similarly, the side wall 112 may also be integrally formed with the bottom wall 111.

[0268] In this embodiment, by setting the bottom wall 111 of the housing 10 as an insulating material, the risk of short circuit between the battery cell 21 and the first surface 1111a or positioning surface 1112a of the bottom wall 111 during use is reduced, which helps to improve the reliability of the battery device 100.

[0269] According to some embodiments of this application, see 2 and Figure 3 As shown, the box 10 includes a first box body 11 and a second box body 12 that are separately arranged. The first box body 11 and the second box body 12 overlap each other along the first direction X to jointly define the assembly space.

[0270] In this embodiment, the housing 10 has a first housing body 11 and a second housing body 12 that are separately arranged. The first housing body 11 and the second housing body 12 are arranged to cover each other along the first direction X to form an assembly space. This facilitates the arrangement of battery cells 21 in the assembly space of the housing 10 and the assembly of battery cells 21 along the first direction X to the inner side of the positioning surface 1112a corresponding to the bottom wall 111. This helps to reduce the difficulty of assembling battery cells 21 into the housing 10.

[0271] In some embodiments, see Figure 3 As shown, the first box body 11 is an injection molded part.

[0272] For example, the material of the first box body 11 may include at least one of polypropylene, polyamide, polyphenylene ether, polybutylene terephthalate or polyethylene terephthalate.

[0273] For example, the material of the second box body 12 is the same as that of the first box body 11.

[0274] In this embodiment, by setting the first box body 11 as an injection molded part, it is beneficial to reduce the difficulty of forming the positioning surface 1112a on the bottom wall 111 of the first box body 11, thereby reducing the manufacturing difficulty of the first box body 11.

[0275] According to some embodiments of this application, refer to Figure 2 and Figure 3 Please refer to further details. Figure 17 , Figure 17 This is an assembly diagram of the first housing body 11 and the mounting member 40 provided in some embodiments of this application. The battery device 100 may further include the mounting member 40, which is mounted on the first housing body 11 and is used to connect to a target component to assemble the battery device 100 onto the target component. The strength of the material of the mounting member 40 is greater than the strength of the material of the first housing body 11.

[0276] The mounting component 40 is a component assembled on the first box body 11 and used to fix the entire box body 10 and mount it to the electrical device, so as to realize the assembly of the battery device 100 onto the electrical device.

[0277] For example, the mounting component 40 can be installed on the first housing body 11 by means of bolts or rivets.

[0278] The strength of the material of the mounting component 40 is greater than that of the material of the first box body 11. In other words, the deformation resistance of the material used in the mounting component 40 is greater than that of the deformation resistance of the material used in the first box body 11.

[0279] In this embodiment, a mounting member 40 is installed on the first box body 11 to facilitate the assembly of the battery device 100 onto the target part for use. By setting the strength of the material of the mounting member 40 to be greater than that of the material of the first box body 11, the difficulty of forming the positioning surface 1112a on the bottom wall 111 of the first box body 11 is reduced, while the stability and reliability of the battery device 100 being mounted onto the target part via the mounting member 40 are improved, and the mounting member 40 has better resistance to deformation.

[0280] In some embodiments, the mount 40 is made of metal.

[0281] For example, the material of the mount 40 may be aluminum alloy, magnesium alloy or steel, etc.

[0282] In this embodiment, by setting the mounting component 40 to a metal material, the mounting component 40 has good structural strength and good aging resistance, which is beneficial to improving the service life of the mounting component 40.

[0283] According to some embodiments of this application, see Figure 2 and Figure 17 As shown, at least a portion of the mounting member 40 is located on the side of the bottom wall 111 away from the assembly space in the first direction X, and the mounting member 40 extends along the second direction Y and extends out of both ends of the bottom wall 111, the second direction Y being perpendicular to the first direction X.

[0284] The mounting component 40 is a structure assembled to the side of the bottom wall 111 opposite to the battery cell 21, and the mounting component 40 is a strip-shaped structure extending along the second direction Y.

[0285] The mounting member 40 extends along the second direction Y and extends beyond both ends of the bottom wall 111, that is, the size of the mounting member 40 in the second direction Y is larger than the size of the bottom wall 111 in the second direction Y, and the two ends of the bottom wall 111 in the second direction Y are located between the two ends of the mounting member 40 in the second direction Y.

[0286] In this embodiment, by configuring the mounting member 40 to extend along the second direction Y and having both ends in the second direction Y to extend out of the bottom wall 111, the support effect of the mounting member 40 on the bottom wall 111 of the first box body 11 can be improved, thereby improving the stability and reliability of the battery device 100 being loaded onto the target part through the mounting member 40, and the deformation resistance of the bottom wall 111 of the first box body 11 can be improved through the mounting member 40.

[0287] In some embodiments, please continue to see Figure 2 and Figure 17 As shown, there are multiple mounts 40, which are arranged at intervals along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0288] For example, in Figure 2 In the battery device 100, there are four mounting members 40, which are spaced apart along the third direction Z. Of course, in other embodiments, the number of mounting members 40 installed on the first housing body 11 can also be two, three, five or six, etc.

[0289] In this embodiment, by providing multiple mounting members 40 arranged along the third direction Z on the first box body 11, the supporting effect of the mounting members 40 on the bottom wall 111 of the first box body 11 can be further improved, thereby further improving the stability and reliability of the battery device 100 being loaded onto the target part through the mounting members 40, and the deformation resistance of the bottom wall 111 of the first box body 11 can be further improved through the mounting members 40.

[0290] According to some embodiments of this application, this application also provides an electrical device, which includes a battery device 100 of any of the above schemes, and the battery device 100 is used to provide electrical energy to the electrical device.

[0291] The electrical device can be any of the aforementioned devices or systems that utilize battery device 100.

[0292] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0293] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: The box-shaped enclosure has an internal assembly space. as well as Multiple battery cells are housed within the assembly space. Each battery cell is cylindrical, and its central axis extends along a first direction. The housing includes a bottom wall with a first surface and a plurality of positioning surfaces. The first surface is configured to support the battery cell in a first direction. One end of each positioning surface in the first direction is connected to the first surface. Each battery cell is correspondingly provided with at least one positioning surface. The positioning surface is disposed facing the outer peripheral surface of the corresponding battery cell, and the positioning surface is an arc surface extending circumferentially along the corresponding battery cell.

2. The battery device according to claim 1, characterized in that, The bottom wall includes: The surface of the plate body facing the assembly space in the first direction is the first surface; A limiting part protrudes from the first surface, the limiting part has the positioning surface, and along the first direction, the limiting part has a second surface facing the assembly space, the positioning surface connecting the first surface and the second surface.

3. The battery device according to claim 2, characterized in that, The limiting part also has a first guiding slope, the positioning surface and the second surface are connected by the first guiding slope, and the first guiding slope is configured to guide the corresponding battery cell into the inner side of the positioning surface.

4. The battery device according to claim 1, characterized in that, Along the first direction, the height of the positioning surface is H1, and the height of the outer peripheral surface of the battery cell is H2, satisfying that 1 / 4≤H1 / H2≤2 / 3.

5. The battery device according to claim 1, characterized in that, The perimeter of the battery cell is L1, and the total length of all the positioning surfaces corresponding to the same battery cell in the circumferential direction of the battery cell is L2, satisfying that L2≥0.5L1.

6. The battery device according to claim 1, characterized in that, The battery device also includes: A first adhesive is at least partially disposed between the first surface and the battery cell, the first adhesive connecting the first surface and the battery cell.

7. The battery device according to claim 6, characterized in that, A portion of the first adhesive is located between the positioning surface and the outer peripheral surface of the battery cell, and the first adhesive connects the positioning surface and the battery cell.

8. The battery device according to claim 7, characterized in that, The positioning surface is provided with a plurality of limiting protrusions, and the plurality of limiting protrusions are arranged at intervals along the circumference of the battery cell. The limiting protrusions abut against the outer peripheral surface of the corresponding battery cell, so that the positioning surface and the outer peripheral surface of the battery cell are spaced apart.

9. The battery device according to claim 8, characterized in that, The limiting protrusion extends along the first direction.

10. The battery device according to claim 9, characterized in that, Along the first direction, a second guide slope is provided at one end of the limiting protrusion away from the first surface, and the second guide slope is configured to guide the corresponding battery cell into the inner side of the positioning surface.

11. The battery device according to claim 10, characterized in that, The bottom wall also has a first guide ramp, which is connected to the end of the positioning surface away from the first surface in the first direction. The first guide ramp is configured to guide the corresponding battery cell into the inner side of the positioning surface. The first guide slope is connected to the second guide slope.

12. The battery device according to claim 11, characterized in that, Within the same cross section parallel to the first direction, the angle between the first guide slope and the first direction is equal to the angle between the second guide slope and the first direction.

13. The battery device according to any one of claims 1-12, characterized in that, The battery device also includes: A thermal management component is disposed within the housing and is configured to exchange heat with the individual battery cells. The thermal management component includes a main body segment along the first direction, the main body segment being located on the side of the battery cell facing the first surface, and in a projection plane perpendicular to the first direction, at least a portion of the orthographic projection of each battery cell overlaps with a portion of the orthographic projection of the main body segment.

14. The battery device according to claim 13, characterized in that, The battery device includes multiple battery cell groups arranged along a second direction, and each battery cell group includes multiple battery cells arranged along a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other; The thermal management component includes a plurality of main body segments spaced apart along the second direction, and the main body segments extend along the third direction. In a projection plane perpendicular to the first direction, at least a portion of the orthographic projection of each battery cell group overlaps with at least a portion of the orthographic projection of at least one of the main body segments.

15. The battery device according to claim 14, characterized in that, The battery device includes multiple pairs of battery cell groups arranged along the second direction, and each pair of battery cell groups includes two battery cell groups. In each pair of battery cell groups, two of the battery cell groups are respectively provided with one main body segment in the first direction.

16. The battery device according to claim 14, characterized in that, Each of the battery cells is provided with a main body segment in the first direction.

17. The battery device according to claim 14, characterized in that, Each pair of adjacent battery cells is provided with a corresponding main body segment in the first direction.

18. The battery device according to claim 14, characterized in that, The interior of the main body section has a first flow channel for accommodating the heat exchange medium; The thermal management component further includes multiple connecting sections, each connecting section having a second flow channel formed inside for accommodating the heat exchange medium. Each pair of adjacent main body sections is connected by one connecting section, and in the three adjacent main body sections, the two ends of the middle main body section are respectively connected to two connecting sections to connect the first flow channel and the second flow channel.

19. The battery device according to claim 14, characterized in that, The interior of the main body section has a first flow channel for accommodating the heat exchange medium; The thermal management component further includes a first delivery pipe and a second delivery pipe. One end of each of the plurality of main body segments is connected to the first delivery pipe, and the other end is connected to the second delivery pipe, so as to connect the first flow channel, the first delivery pipe and the second delivery pipe.

20. The battery device according to claim 13, characterized in that, The positioning surfaces are spaced apart at both ends of the corresponding battery cell in the circumferential direction, and in a projection plane perpendicular to the first direction, the orthographic projection of the positioning surfaces and the orthographic projection of the main body segment do not overlap.

21. The battery device according to claim 20, characterized in that, The thermal management component includes a plurality of main body segments arranged at intervals along a second direction, and the main body segments extend along a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other; Along the second direction, a positioning surface is provided between every two adjacent main body segments.

22. The battery device according to claim 21, characterized in that, Each of the main body segments has a positioning surface on both sides in the second direction, and the positioning surfaces on both sides of the same main body segment are arranged opposite to each other along the second direction.

23. The battery device according to claim 20, characterized in that, The bottom wall includes a plate body and a limiting part. The plate body has a first surface, the limiting part protrudes from the first surface and has a positioning surface. Along the first direction, the limiting part has a second surface facing the assembly space, and the positioning surface connects the first surface and the second surface. In the projection plane perpendicular to the first direction, the orthographic projection of the limiting part does not overlap with the orthographic projection of the main body segment.

24. The battery device according to claim 23, characterized in that, The plate body and the limiting part are integrally formed; or The plate body and the limiting part are disposed and connected.

25. The battery device according to claim 13, characterized in that, The positioning surface and the main body segment are arranged along the first direction, and at least a portion of the orthographic projection of the positioning surface and at least a portion of the orthographic projection of the main body segment overlap in a projection plane perpendicular to the first direction.

26. The battery device according to claim 25, characterized in that, The positioning surface is a ring structure that extends circumferentially along the corresponding battery cell.

27. The battery device according to claim 25, characterized in that, The bottom wall includes a plate body and a limiting part. The plate body has a first surface, the limiting part protrudes from the first surface and has a positioning surface. Along the first direction, the limiting part has a second surface facing the assembly space, and the positioning surface connects the first surface and the second surface. Wherein, along the first direction, the main body segment is located on the side of the limiting portion facing the plate body.

28. The battery device according to claim 27, characterized in that, The plate body and the limiting part are disposed and connected.

29. The battery device according to claim 13, characterized in that, The first surface is provided with a mounting groove, and at least a portion of the main body segment is disposed within the mounting groove.

30. The battery device according to claim 29, characterized in that, Along the first direction, the main body segment does not protrude from the first surface.

31. The battery device according to claim 29, characterized in that, The battery device also includes: The second adhesive is at least partially disposed between the main body segment and the bottom surface of the mounting groove, and the second adhesive connects the main body segment and the bottom surface of the mounting groove.

32. The battery device according to claim 13, characterized in that, The battery device also includes: A third adhesive is at least partially disposed between the main body segment and the battery cell, the third adhesive connecting the main body segment and the battery cell.

33. The battery device according to any one of claims 1-12, characterized in that, The bottom wall is made of insulating material.

34. The battery device according to any one of claims 1-12, characterized in that, The enclosure includes a first enclosure body and a second enclosure body that are separately configured. The first enclosure body and the second enclosure body overlap each other along the first direction and jointly define the assembly space.

35. The battery device according to claim 34, characterized in that, The first box body is an injection molded part.

36. The battery device according to claim 35, characterized in that, The battery device also includes: A mounting bracket is installed on the first box body, and the mounting bracket is used to connect to the target component to assemble the battery device onto the target component; The strength of the material of the mounting component is greater than the strength of the material of the first box body.

37. The battery device according to claim 36, characterized in that, The mounting component is made of metal.

38. The battery device according to claim 36, characterized in that, At least a portion of the mounting member is located on the side of the bottom wall away from the assembly space in the first direction, and the mounting member extends along a second direction and extends beyond both ends of the bottom wall, the second direction being perpendicular to the first direction.

39. The battery device according to claim 38, characterized in that, There are multiple mounting components, which are arranged at intervals along a third direction, with the first direction, the second direction, and the third direction being perpendicular to each other.

40. An electrical device, characterized in that, Includes a battery device as described in any one of claims 1-39, the battery device being used to provide electrical energy.

Images