A battery device and an electrical device

Abstract

This utility model relates to the field of battery technology and discloses a battery device and an electrical device. The battery device includes a housing and individual battery cells disposed within the housing; a first support structure is also provided within the housing, the first support structure including a support column and a sleeve; the sleeve and two or more control boxes are mounted on the support column, wherein the sleeve is located between two adjacent control boxes. This "support column + sleeve" structural combination enables the stacking arrangement of multiple control boxes, which not only provides strong scalability but also reduces production costs while improving the rigidity of the support and minimizing the space occupied by the control box mounting brackets within the housing, thereby improving the space utilization rate of the battery device.

Description

Technical Field

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

[0002] Within a battery device, there are one or more components (or control boxes) that are paired with it to perform functions such as electronic control and battery management. As battery energy density increases, the internal space of the enclosure becomes increasingly limited. To optimize the internal space and improve space utilization, improvements need to be made to the layout of the control boxes within the enclosure.

[0003] Therefore, it is desirable to provide a battery device and an electrical device that can improve the space utilization of the battery device while reducing production costs. Utility Model Content

[0004] This specification provides one or more embodiments of a battery device, the battery device including a housing and a battery cell disposed in the housing; the housing also includes a first support structure, the first support structure including a support column and a sleeve; the support column is fitted with the sleeve and two or more control boxes, wherein the sleeve is located between two adjacent control boxes.

[0005] In the technical solutions provided in the embodiments of this specification, multiple control boxes are stacked and arranged by means of a "support column + sleeve" structural combination. This not only has strong scalability, but also reduces production costs while improving the rigidity of the support and reducing the space occupied by the mounting bracket of the control box in the box, thereby improving the space utilization of the battery device.

[0006] In some embodiments, the housing of the control box is provided with a plurality of connecting parts; the support column corresponds one-to-one with the connecting parts, and the control box is sleeved on the support column through the connecting parts.

[0007] In the technical solutions provided in the embodiments of this specification, the housing of the control box is provided with multiple connecting parts, and the control box is sleeved on the support through the connecting parts, which can reduce the overall installation height and improve the connection stability, thereby further improving the space utilization of the battery device.

[0008] In some embodiments, the connecting portion is provided with an annular insert.

[0009] In the technical solutions provided in the embodiments of this specification, the connecting part is provided with an annular insert, which helps to improve the rigidity and strength of the connecting part and avoid crushing.

[0010] In some embodiments, the inner diameter of the insert is not less than the inner diameter of the sleeve, and the outer diameter of the insert is not greater than the outer diameter of the sleeve.

[0011] In the technical solutions provided in the embodiments of this specification, by limiting the relationship between the inner and outer diameters of the insert and the sleeve, it is possible to ensure that the inner hole of the sleeve is unobstructed or that the fit is consistent, while avoiding the sleeve wall thickness being too small and reducing the risk of crushing during connection and fastening.

[0012] In some embodiments, the connecting portion is integrally formed with the housing, and the insert is a metal insert.

[0013] In the technical solutions provided in the embodiments of this specification, the connecting part and the housing of the control box are manufactured using an integral molding process. This not only reduces assembly steps but also effectively avoids the weaknesses of the joints in a split structure, reduces the risk of loosening of the overall structure, and is more suitable for the vibration environment of the battery device. The insert is made of metal, which has a long service life and helps to further improve the rigidity and strength of the connecting part, preventing crushing.

[0014] In some embodiments, one end of the support column is connected to the bottom plate of the housing.

[0015] In the technical solutions provided in the embodiments of this specification, due to the good structural strength of the bottom plate of the housing, the connection strength between one end of the support column and the bottom plate is high, and the resistance to pull-out is strong. Moreover, this arrangement allows the control box to be located in the lower middle part of the housing, thereby making the center of gravity of the battery device lower and more stable.

[0016] In some embodiments, the battery device further includes a second support structure, which spans between two or more beams in the housing; the first support structure is disposed on the second support structure.

[0017] In the technical solution provided in the embodiments of this specification, the first support structure is no longer connected to the base plate, but is set on the second support structure. Therefore, it can be placed at any height inside the enclosure, freed from the limitations of the base plate, thereby optimizing space utilization. Furthermore, the second support structure can provide more installation space for the first support structure; for example, the first support structure can be set on both the upper and lower sides of the second support structure. The weight of the control box can also be distributed to the enclosure frame through the beams, and the base plate is not subjected to concentrated forces. In addition, this arrangement allows the control box and battery cells to be arranged in layers, which is beneficial for thermal management and independent maintenance.

[0018] In some embodiments, a rivet nut is provided on the bottom plate of the box or the second support structure, and one end of the support column is threadedly connected to the rivet nut.

[0019] In the technical solutions provided in the embodiments of this specification, rivet nuts are installed on the base plate or the second support structure, so that the rivet nuts and the base plate or the second support structure form a mechanical interlock, resulting in strong tensile and shear resistance. In addition, one end of the support column is threadedly connected to the rivet nut, and the tightening torque of the thread can be precisely controlled, improving the reliability of the connection. Furthermore, the support column is detachable, which facilitates the maintenance of the control box and is suitable for enclosed box structures.

[0020] In some embodiments, one end of the support column is press-fitted to the bottom plate of the box or the second support structure.

[0021] In the technical solutions provided in the embodiments of this specification, the press-fit process can form a permanent mechanical connection without loosening gaps, and the press-fit joint has excellent shear and tensile resistance. The press-fit process can also reduce assembly steps and costs, and is easy to automate production with high consistency. Furthermore, the press-fit head is flat and does not occupy extra space, which is beneficial to further improving the space utilization rate of the battery device.

[0022] One or more embodiments of this specification also provide an electrical device, the electrical device including the aforementioned battery device, the battery device serving as a power source for the electrical device and / or an energy storage unit for the electrical device. Attached Figure Description

[0023] Figure 1 This is an exploded view of the battery device provided according to the first embodiment of this specification;

[0024] Figure 2 This is a top view of the internal structure of the battery device provided according to the second embodiment of this specification;

[0025] Figure 3 This is a top view of the internal structure of the battery device provided according to the third embodiment of this specification;

[0026] Figure 4 A schematic diagram of the connection relationship between the control box and the first bracket structure provided in the fourth embodiment of this specification;

[0027] Figure 5A This is a schematic diagram showing the connection relationship between the control box and the first bracket structure according to the fifth embodiment of this specification;

[0028] Figure 5B yes Figure 5A Enlarged view of point C in the middle;

[0029] Figure 6 This is an exploded view showing the connection relationship between the control box and the first bracket structure according to the fourth embodiment of this specification;

[0030] Figure 7This is an exploded view showing the connection relationship between the control box and the first bracket structure according to the fifth embodiment of this specification;

[0031] Figure 8 yes Figure 4 Cross-sectional view along the AA direction;

[0032] Figure 9 yes Figure 5A Cross-sectional view along the BB direction.

[0033] Reference numerals: 1. Battery assembly; 10. Housing; 11. Base plate; 12. Beam; 20. Battery cell; 21. Battery module; 30. First support structure; 31. Column; 32. Sleeve; 40. Control box; 41. Housing; 411. First side wall; 412. Second side wall; 42. Connecting part; 421. Insert; 422. Baffle; 423. Connecting plate; 50. Second support structure; 60. Rivet nut; 70. Fastener. Detailed Implementation

[0034] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0037] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows mutual communication; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, tablets, laptop computers, electric toys, electric tools, battery-powered vehicles, electric vehicles, ships, spacecrafts, etc. Among them, electric vehicles can be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or extended-range electric vehicles, etc.

[0040] In some embodiments, the battery device can be used as a power source (such as an operating power source, a driving power source) for an electrical device (such as a new energy vehicle). The battery device can also be used as an energy storage unit of the electrical device. The battery device can also be used as both the power source and the energy storage unit of the electrical device at the same time. Among them, the energy storage unit is used to store electrical energy and can release electrical energy as needed to provide an energy reserve for the electrical device.

[0041] Please refer to Figure 1 , Figure 1 is an exploded view of the battery device provided according to the first embodiment of this specification. The battery device 1 includes a box body 10 and battery cells 20 disposed in the box body 10. Among them, the box body 10 is used to carry and protect the internal battery cells 20 and structural members, and the box body 10 can adopt various structural forms. The battery cell 20 refers to the basic electrochemical unit that realizes the storage and release of electrical energy. In the battery device 1, there can be multiple battery cells 20, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 20 is accommodated in the box body 10. Of course, the battery device 1 can also be in the form that multiple battery cells 20 are first connected in series, in parallel, or in a mixed connection to form a battery module 21 (see Figures 2-3 ), and then multiple battery modules 21 are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the box body 10.

[0042] The battery device 1 can also include other structures. For example, the battery device 1 can also include a control box (see Figures 2-3 ). Among them, the control box is the housing component of the electric control / management module (such as the BMS master-slave control module, high-voltage box, etc.) supporting the battery device 1.

[0043] To optimize space within the battery pack, mounting brackets are needed to stack control boxes (such as BMS master-slave control modules). However, existing mounting brackets suffer from two main technical drawbacks: firstly, traditional manufacturing processes result in complex construction schemes and high production costs; secondly, they lack structural rigidity. These technical bottlenecks hinder the integrated development of battery systems.

[0044] Based on this, some embodiments of this specification provide a battery device. The battery device housing includes a first support structure comprising a support column and a sleeve. The sleeve supports and separates two adjacent control boxes, while the support column connects and secures the control boxes to the housing. This "support column + sleeve" structural combination enables the vertical stacking of multiple control boxes, providing strong scalability and reducing production costs while improving support rigidity. It also reduces the space occupied by the control box mounting brackets within the housing, thereby improving the space utilization of the battery device and contributing to the integrated development of battery systems.

[0045] Figure 2 This is a top view of the internal structure of the battery device provided according to the second embodiment of this specification; Figure 3 This is a top view of the internal structure of the battery device provided according to the third embodiment of this specification; Figure 4 A schematic diagram of the connection relationship between the control box and the first bracket structure provided in the fourth embodiment of this specification; Figure 5A This is a schematic diagram showing the connection relationship between the control box and the first bracket structure according to the fifth embodiment of this specification; Figure 5B yes Figure 5A Enlarged diagram of point C in the middle.

[0046] like Figures 2-5B As shown, the battery device 1 includes a housing 10 and battery cells 20 disposed within the housing 10. A first support structure 30 is also provided inside the housing 10, the first support structure 30 including a support column 31 and a sleeve 32. The sleeve 32 and two or more control boxes 40 are fitted onto the support column 31, wherein the sleeve 32 is located between two adjacent control boxes 40.

[0047] The first support structure 30 is used to fix the control box 40 inside the housing 10.

[0048] The support pillar 31 is a component of the first support structure 30 for connecting and fixing the control box 40. The material of the support pillar 31 can include metal materials (such as aluminum alloy, etc.) or high-strength engineering plastics, etc., and it needs to have sufficient axial stiffness and bending strength to bear the weight and vibration load of the control box 40. The support pillar 31 has a columnar structure, and the radial cross-sectional shape of the support pillar 31 includes but is not limited to circular, square, polygonal or irregular shapes, etc., and the inner hole shape of the sleeve 32 matches it. The support pillar 31 can be a smooth shaft, or a threaded rod or its outer peripheral part is provided with threads, which can be specifically determined according to actual application requirements.

[0049] The sleeve 32 is a component of the first support structure 30 for supporting and separating two adjacent control boxes 40. The sleeve 32 is a hollow tubular structure and is sleeved on the outer periphery of the support pillar 31. The material of the sleeve 32 can include metal materials or high-strength engineering plastics, etc., and the material strength can meet normal locking and avoid crushing.

[0050] In some embodiments, the sleeve 32 can be used as a spacer between two adjacent control boxes 40 to determine the installation spacing in the height direction (such as the Z direction) of the control box 40. At the same time, the sleeve 32 also provides axial support for the control box 40 to prevent the control box 40 from slipping on the support pillar 31. In other embodiments, the sleeve 32 can also provide electrical insulation or heat conduction functions.

[0051] As mentioned above, the control box 40 is a component of the electronic control / management module supporting the battery device 1. Among them, the electronic control / management module can be a BMS master-slave control module, a high-voltage control module, a power distribution module, a thermal management module, etc. The control box 40 is provided with a printed circuit board, an electrical connector, a power device, etc., for realizing functions such as battery state monitoring, balancing management, communication, etc.

[0052] In some embodiments, the number of control boxes 40 can be two or more. Two or more control boxes 40 are sleeved on the support pillar 31, that is, they are arranged in an axial stack along the support pillar 31, and a sleeve 32 is provided between two adjacent control boxes 40.

[0053] In some embodiments, one end of the support pillar 31 can be connected to the box body 10, and the other end of the support pillar 31 is a fixed end or connected to other structures (such as a nut), so as to stack two or more control boxes 40 in the box body 10. It should be noted that the connection between one end of the support pillar 31 and the box body 10 can be achieved in various ways. For example, one end of the support pillar 31 can be directly connected to the box body 10 by welding, threaded connection, riveting, etc. Another example is that one end of the support pillar 31 can be indirectly connected to the box body 10 through other components in the box body 10 (such as Figure 3 the second support structure shown, and also such as intermediate parts like a backing plate, an angle seat, etc.).

[0054] In some embodiments of this specification, a "support column + sleeve" structural combination is used to achieve the stacked arrangement of multiple control boxes. This not only provides strong scalability, but also reduces production costs while improving the rigidity of the support and reducing the space occupied by the mounting bracket of the control box in the housing, thereby improving the space utilization of the battery device.

[0055] In some embodiments, one end of the support column 31 is connected to the bottom plate 11 of the housing 10.

[0056] The bottom plate 11 of the housing 10 is the bottom component of the housing 10. The bottom plate 11 is a flat plate or a plate structure with reinforcing ribs, used to support the weight of the battery cell 20. The material of the bottom plate 11 may include metal materials (such as aluminum alloy) or composite materials.

[0057] It is worth noting that the base plate 11 includes any bottom load-bearing structure of the box 10, not limited to a single flat plate, but also including frame-type or cavity-type bottom structures.

[0058] In some embodiments, the support column 31 can extend upward perpendicularly to the base plate 11, and two or more control boxes 40 can be stacked along the axial direction of the support column 31 to utilize the height space of the housing 10 and save the horizontal space of the housing 10. In some embodiments, the support column 31 and the base plate 11 can be set at a certain angle (e.g., 30°) to accommodate irregular spaces inside the housing 10 or to optimize the interface orientation of the control boxes 40. In other embodiments, multiple support columns 31 can also be arranged in a matrix or ring on the base plate 11 to support multiple sets of control boxes 40, forming a modular installation structure.

[0059] Understandably, since the base plate 11 has good structural strength, fixing one end of the support column 31 to the base plate 11 can provide a stable support foundation by utilizing the structural strength of the base plate 11, and it also has strong resistance to pull-out. Moreover, this arrangement will place the control box 40 in the lower middle part of the housing 10, thereby making the center of gravity of the battery device 1 lower and more stable.

[0060] It should be noted that the support column 31 can also be connected to other components of the housing 10 (such as crossbeams) according to actual application requirements, so as to fix the control box 40 inside the housing 10.

[0061] In some embodiments, such as Figure 3 As shown, the battery device 1 also includes a second support structure 50, which spans between two or more beams 12 in the housing 10. A first support structure 30 is mounted on the second support structure 50.

[0062] The second support structure 50 is a support structure independent of the base plate 11 of the housing 10. The second support structure 50 can be used to create additional mounting surfaces or suspension points within the housing 10. The second support structure 50 can be designed in various structural shapes. For example, the second support structure 50 may include one or more combinations of plates, beams, or frames to have sufficient rigidity to support the weight of the first support structure 30 and the control box 40.

[0063] The beam 12 refers to the longitudinal or transverse stiffeners or profile components inside the housing 10 that provide reinforcement and support. The beam 12 can be a side frame beam of the housing 10, a central crossbeam of the housing 10, or an end plate or side plate of the battery module. In some embodiments, such as... Figure 3 As shown, beams 12 are located on opposite sides inside the box 10 (i.e., two opposing side frame beams), and the second support structure 50 is located in the middle of the box 10, bridging the two beams 12. Bridging means that both ends of the second support structure 50 are connected to the two beams 12 of the box 10, forming a bridge structure. Bridging includes horizontal bridging, inclined bridging, and arc-shaped bridging.

[0064] It should be noted that the second support structure 50 spanning two or more beams 12 in the box body 10 can include various situations: for example, the rectangular frame in the second support structure 50 is connected to the four side beams; or the two short sides of the rectangular or long strip support plate in the second support structure 50 are respectively connected to two opposite beams 12, and the middle position of the support plate can also be connected to another beam 12, which can serve as an intermediate fulcrum to increase the strength of the second support structure 50.

[0065] The first support structure 30 can be arranged on the second support structure 50 in various ways. In some embodiments, taking the second support structure 50 having a plate-like main body (such as a support plate) as an example, the first support structure 30 can be disposed on one side of the plate-like main body of the second support structure 50 (such as...). Figure 3 (as shown on the upper side). In some other embodiments, the first support structure 30 may be disposed on both sides of the plate-shaped main body of the second support structure 50, that is, the first support structure 30 is disposed on both the upper and lower sides of the second support structure 50.

[0066] Similar to the connection between one end of the support column 31 and the bottom plate 11 of the box 10, the first support structure 30 and the second support structure 50 can also be directly connected or indirectly connected through an intermediate component, which will not be elaborated here.

[0067] In some embodiments described in this specification, the first support structure is no longer connected to the base plate but is instead mounted on the second support structure. This allows it to be positioned at any height within the enclosure, freeing it from the limitations of the base plate and optimizing space utilization. Furthermore, the second support structure provides more installation space for the first support structure; for example, the first support structure can be mounted on either side of the second support structure. The weight of the control box can also be distributed to the enclosure frame through the beams, preventing concentrated forces on the base plate. In addition, this arrangement allows for a layered arrangement of the control box and battery cells, facilitating thermal management and independent maintenance.

[0068] Figure 6 This is an exploded view showing the connection relationship between the control box and the first bracket structure according to the fourth embodiment of this specification; Figure 7 This is an exploded view of the connection relationship between the control box and the first bracket structure provided in the fifth embodiment of this specification.

[0069] In some embodiments, such as Figures 6-7 As shown, the housing 41 of the control box 40 is provided with multiple connecting parts 42. The support column 31 corresponds to each connecting part 42, and the control box 40 is sleeved on the support column 31 through the connecting parts 42.

[0070] Housing 41 is the external enclosure structure of the control box. In some embodiments, housing 41 is used to house internal electrical components. Housing 41 may be made of insulating material (such as plastic, composite material) or metal material.

[0071] In some embodiments, the housing 41 has opposing first sidewalls 411 and second sidewalls 412. For example... Figure 6 As shown, the first sidewall 411 and the second sidewall 412 correspond to the two sidewalls of the control box 40 along its length direction (e.g., the X direction). One or more connecting portions 42 may be provided on each of the first sidewall 411 and the second sidewall 412.

[0072] The connecting portion 42 refers to a component used to cooperate with the support column 31 to achieve a mechanical connection. In some embodiments, the connecting portion 42 is disposed at the bottom of the side wall of the housing 41 and has a through hole or sleeve structure for the support column 31 to pass through. In some embodiments, such as Figures 6-7 As shown, the connecting part 42 includes a baffle 422 and a connecting plate 423. The baffle 422 is disposed on both sides of the connecting plate 423 along the width direction (e.g., the Y direction) of the control box 40, and is used to connect the side wall of the housing 41 to the connecting plate 423. The structural shape of the baffle 422 includes, but is not limited to, trapezoidal, rectangular, and right-angled triangular shapes. It can be understood that by setting two opposing baffles 422, the structural rigidity of the connecting part 42 can be effectively enhanced, and the risk of crushing can be reduced.

[0073] On one side wall, the number of connecting portions 42 can be one or more. If there is only one connecting portion 42 on a side wall, the connecting portions 42 on the first side wall 411 can be symmetrically arranged with the connecting portions 42 on the second side wall 412 or arranged diagonally. If there are multiple connecting portions 42 on a side wall, the multiple connecting portions 42 on the first side wall 411 and the multiple connecting portions 42 on the second side wall 412 are spaced apart, and the multiple connecting portions 42 on both side walls are symmetrically arranged. This is just an example. Figures 6-7 As shown, the first sidewall 411 and the second sidewall 412 each have two connecting portions 42, which are spaced apart at both ends of the sidewall along the width direction (such as the Y direction) of the control box 40, and the two connecting portions 42 on the two sidewalls are symmetrically arranged.

[0074] The spacing setting refers to the distribution of two adjacent connecting parts 42 on the same side wall at a preset distance. The preset distance can be determined based on the size of the housing 41, the weight of the control box 40, and mechanical calculations to ensure that the control box 40 is subjected to balanced forces.

[0075] The symmetrical arrangement can be understood as the two connecting parts 42 located on different side walls being symmetrical about the central axis L of the control box 40, and their positions in the height direction of the control box 40 being consistent. The length direction of the control box 40 can be represented by... Figure 4 The direction indicated by the X arrow in the middle represents its width direction, which can be represented by... Figure 4 The direction indicated by the Y-arrow in the middle represents its height direction, which can be represented by... Figure 4 The direction indicated by the Z-arrow is shown in the middle.

[0076] In other embodiments, one sidewall (such as the first sidewall 411) may have only one connecting portion 42, while the other sidewall (such as the second sidewall 412) may have two connecting portions 42. In this case, the two connecting portions 42 on the second sidewall 412 may be spaced apart at both ends of the second sidewall 412 along the width direction of the control box 40, while one connecting portion 42 on the first sidewall 411 may be located at the middle position of the first sidewall 411 along the width direction of the control box 40. Moreover, in this case, the three connecting portions 42 are positioned symmetrically in the height direction of the control box 40.

[0077] It should be noted that the names of the first sidewall 411 and the second sidewall 412 are only used to distinguish the two opposite walls and do not limit their specific orientation.

[0078] One-to-one correspondence means that the number of support pillars 31 and connecting parts 42 are equal and their positions correspond. That is, each connecting part 42 corresponds to one support pillar 31, and each support pillar 31 passes through one connecting part 42. This arrangement ensures the stable positioning of the control box 40 on the support pillars 31 and prevents rotation and displacement.

[0079] In some embodiments of this specification, the housing of the control box is provided with multiple connecting parts, and the control box is sleeved on the support column through the connecting parts, which can reduce the overall installation height and improve the connection stability, thereby further improving the space utilization of the battery device.

[0080] In some embodiments, the connecting portion 42 is provided with an annular insert.

[0081] An annular insert refers to an annular structural component embedded in the connecting part 42 (such as the connecting plate 423). The annular insert has a central hole through which the support column 31 passes. The insert 421 can be made of metallic materials (such as aluminum alloy, stainless steel, copper alloy, etc.) or non-metallic materials (such as high-strength engineering plastics, ceramics, composite materials, etc.).

[0082] Insert 421 can be embedded into connector 42 in various ways. In some embodiments, insert 421 can be pre-embedded into connector 42 during injection molding. In some embodiments, insert 421 can be press-fitted into connector 42 after connector 42 is formed. In other embodiments, the outer surface of insert 421 can be provided with external threads, which engage with the internal threads of connector 42 to embed insert 421 into connector 42.

[0083] It should be noted that "ring-shaped" should be understood as a closed or nearly closed shape with a central hole, including circular rings, square rings, polygonal rings, etc. Insert 421 may have the same base material as the connecting part 42 but with enhanced performance (e.g., local densification, fiber reinforcement).

[0084] In some embodiments of this specification, the use of annular inserts in the connection portion helps to improve the rigidity and strength of the connection portion and prevents crushing.

[0085] In some embodiments, the inner diameter of the insert 421 is not less than the inner diameter of the sleeve 32, and the outer diameter of the insert 421 is not greater than the outer diameter of the sleeve 32.

[0086] Understandably, the inner diameter of insert 421 is not less than the inner diameter of sleeve 32, allowing the support 31 to pass smoothly through insert 421 and sleeve 32, avoiding assembly difficulties due to dimensional interference. The outer diameter of insert 421 is not greater than the outer diameter of sleeve 32, ensuring that the end face of sleeve 32 completely covers the end face of insert 421, or at least is flush with it. When sleeve 32 acts as a spacer, its end face directly acts on the housing 41 of control box 40 or the end face of insert 421. If the outer diameter of sleeve 32 is smaller than the outer diameter of insert 421, it may cause excessive local pressure, resulting in crushing or damage to sleeve 32.

[0087] It is worth noting that the difference in inner diameter and the difference in outer diameter between insert 421 and sleeve 32 are both greater than the tolerance of insert 421.

[0088] In some embodiments of this specification, by defining the relationship between the inner and outer diameters of the insert and the sleeve, it is possible to avoid the sleeve wall thickness being too small and reduce the risk of crushing during connection and fastening, while ensuring that the inner hole of the sleeve is unobstructed or fits consistently.

[0089] In some embodiments, the connecting part 42 is integrally formed with the housing 41, and the insert 421 is a metal insert.

[0090] One-piece molding refers to the process by which the connecting part 42 and the housing 41 are formed into an integral structure without obvious connection interfaces and with more uniform stress distribution through a single manufacturing process. For example, one-piece molding can include injection molding, die casting, and compression molding. It is understandable that one-piece molding of the connecting part 42 and the housing 41 can reduce the number of parts, eliminate assembly errors, improve the overall structural integrity, and reduce manufacturing costs.

[0091] A metal insert refers to a ring-shaped insert made of metal. Understandably, by using a metal insert for insert 421, the high strength of the metal material can be utilized to improve the structural strength and rigidity of the connection part 42.

[0092] It should be noted that the connecting part 42 can also adopt any other feasible connection method with the housing 41, such as welding, threaded connection, etc. The metal insert can include pure metal and metal-based composite material inserts. When the housing 41 itself is made of metal, the insert 421 can be made of the same or different material as the housing 41 and can be fixed by welding or threaded connection.

[0093] Figure 8 yes Figure 4 Cross-sectional view along the AA direction.

[0094] In some embodiments, such as Figure 2 , Figure 3 , Figure 6 , Figure 8 As shown, a rivet nut 60 is provided on the bottom plate 11 or the second support structure 50 of the box body 10, and one end of the support column 31 is threadedly connected to the rivet nut 60.

[0095] The rivet nut 60 is a single-sided fastener with an internal thread at one end and a flange at the other, with a deformation zone in the middle. During installation, the threaded end of the rivet nut 60 is inserted into the pre-drilled hole from one side of the plate (referred to as the first side), with the flange end abutting against the surface of the first side of the plate. Using a special tool (such as a rivet gun), the rivet nut is screwed into the internal thread from the other side of the plate (referred to as the second side) and pulled outwards. The deformation zone expands under pressure, forming a "bulge" that mechanically engages with the inner wall of the pre-drilled hole in the plate. Finally, the special tool is reversed to unscrew it from the internal thread, at which point a secure internal threaded hole is formed on the second side of the plate.

[0096] In some embodiments, the rivet nut 60 may be correspondingly disposed on the base plate 11 of the housing 10 or the second support structure 50, serving as the mounting point for the support column 31 of the first support structure 30. In some embodiments, the rivet nut 60 corresponds one-to-one with the support column 31, and the end of the support column 31 near the rivet nut 60 is provided with an external thread. The support column 31 is fixed to the base plate 11 or the second support structure 50 by engaging with the internal thread of the rivet nut 60 through the external thread of the support column 31.

[0097] In this embodiment, an exemplary assembly method for fixing two or more control boxes 40 to the base plate 11 of the housing 10 or the second support structure 50 using the first support structure 30 includes:

[0098] 1) First, place the lower control box 40 on the base plate 11 or the second bracket structure 50, and align the center holes of the multiple inserts 421 of the lower control box 40 with the center of the multiple rivet nuts 60.

[0099] 2) Next, multiple pillars 31 are assembled onto the upper control box 40, so that the multiple pillars 31 pass through the multiple inserts 421 of the upper control box 40 in sequence.

[0100] 3) Then assemble multiple sleeves 32 onto multiple supports 31.

[0101] 4) Finally, the multiple support columns 31 through which the multiple sleeves 32 pass are screwed into the multiple rivet nuts 60 in sequence, thereby fixing two or more control boxes 40 onto the base plate 11 of the housing 10 or the second bracket structure 50.

[0102] In some embodiments described in this specification, rivet nuts are installed on the base plate or the second support structure, creating a mechanical interlock between the rivet nuts and the base plate or the second support structure, resulting in strong tensile and shear resistance. Furthermore, one end of the support column is threadedly connected to the rivet nut, allowing for precise control of the thread tightening torque to ensure reliable connection. The support column is also detachable, facilitating control box maintenance and making it suitable for enclosed enclosure structures.

[0103] Figure 9 yes Figure 5A Cross-sectional view along the BB direction.

[0104] In some embodiments, such as Figure 2 , Figure 3 , Figure 7 , Figure 9 As shown, one end of the support column 31 is press-riveted to the bottom plate 11 of the box body 10 or the second support structure 50.

[0105] Press-fit connection is a connection method in which a connector (such as the end of a support column) is pressed into a pre-drilled hole in a sheet metal using pressure, and the plastic deformation of the material is used to form a mechanical interlocking or interference fit.

[0106] In some embodiments, one end of the support column 31 is provided with a riveting head, which can be a toothed or grooved cylindrical structure. A pre-drilled hole is provided on the base plate 11 or the second support structure 50, the diameter of which is slightly smaller than the outer diameter of the riveting head. The riveting head is pressed into the pre-drilled hole using a press, and the teeth or grooves of the riveting head cut into the hole wall to form a mechanical engagement, thereby riveting one end of the support column 31 to the base plate 11 or the second support structure 50.

[0107] like Figure 9 As shown, when one end of the support column 31 is riveted to the base plate 11 or the second support structure 50, the other end of the support column 31 may also be provided with a fastener 70 (such as a nut) to lock two or more control boxes 40 sleeved on the support column 31.

[0108] In this embodiment, an exemplary assembly method for fixing two or more control boxes 40 to the base plate 11 of the housing 10 or the second support structure 50 using the first support structure 30 includes:

[0109] 1) First, pass multiple inserts 421 of the lower control box 40 through multiple pillars 31 in sequence to place the lower control box 40 on the base plate 11 or the second support structure 50.

[0110] 2) Next, multiple sleeves 32 are passed through multiple support pillars 31 in sequence to assemble the multiple sleeves 32 onto the lower control box 40.

[0111] 3) Then, the multiple inserts 421 of the upper control box 40 are passed through the multiple pillars 31 in sequence to assemble the upper control box 40 onto the multiple sleeves 32.

[0112] 4) Finally, tighten the fasteners 70 to fix two or more control boxes 40 to the base plate 11 of the housing 10 or the second bracket structure 50.

[0113] In some embodiments described in this specification, the press-fit process can form a permanent mechanical connection without loosening gaps, and the press-fit joint has excellent shear and tensile resistance. The press-fit process can also reduce assembly steps and costs, and is easy to automate production with high consistency. Furthermore, the flat press-fit head does not occupy extra space, which helps to further improve the space utilization of the battery device.

[0114] The beneficial effects that the embodiments of this specification may bring include, but are not limited to: (1) The stacking arrangement of multiple control boxes by the combination of "support column + sleeve" structure not only has strong scalability, but also reduces production costs while improving the rigidity of the support and reducing the space occupied by the mounting bracket of the control box in the box, thereby improving the space utilization of the battery device; (2) By setting rivet nuts on the base plate or the second support structure, the rivet nuts and the base plate or the second support structure form a mechanical interlock, which has strong tensile and shear resistance. In addition, one end of the support column is threadedly connected to the rivet nut, and its thread tightening torque can be precisely controlled to ensure the reliability of the connection. The support column can be disassembled, which is convenient for the maintenance of the control box and is suitable for closed box structure; (3) The press riveting process can form a permanent mechanical connection without loose gaps, and the press riveting joint has excellent shear and tensile resistance. The press riveting process can also reduce assembly steps and costs, and is easy to automate production with high consistency. In addition, the press riveting head is flat and does not occupy extra space, which is conducive to further improving the space utilization of the battery device.

[0115] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects may be any one or a combination of the above, or any other possible beneficial effects.

[0116] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, It includes a housing and individual battery cells disposed within the housing; the housing also includes a first support structure, which includes a support column and a sleeve. The support column is fitted with the sleeve and two or more control boxes, wherein the sleeve is located between two adjacent control boxes.

2. The battery device of claim 1, wherein The housing of the control box is provided with multiple connecting parts; The support column and the connecting part correspond one-to-one, and the control box is sleeved on the support column through the connecting part.

3. The battery device of claim 2, wherein, The connecting part is provided with an annular insert.

4. The battery device of claim 3, wherein The inner diameter of the insert is not less than the inner diameter of the sleeve, and the outer diameter of the insert is not greater than the outer diameter of the sleeve.

5. The battery device of claim 3, wherein The connecting part is integrally formed with the housing, and the insert is a metal insert.

6. The battery device of claim 1, wherein One end of the support column is connected to the bottom plate of the box.

7. The battery device of claim 1, wherein The battery device also includes a second support structure, which spans between two or more beams in the housing; The first support structure is provided on the second support structure.

8. The battery device according to claim 6 or 7, characterized by The bottom plate of the box or the second support structure is provided with a rivet nut, and one end of the support column is threadedly connected to the rivet nut.

9. The battery device according to claim 6 or 7, characterized by One end of the support column is press-fitted to the bottom plate of the box or the second support structure.

10. An electrical device, characterized by Includes the battery device as described in any one of claims 1 to 9, wherein the battery device serves as a power source for the electrical device and / or an energy storage unit for the electrical device.

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