Box structure, battery pack and electric device
By adding protrusions and reinforcing ribs to the connection points of the battery pack housing, the connection strength is enhanced, solving the problem of easy deformation at the connection points in multi-layer stacked battery pack structures, and achieving efficient modular maintenance and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- EVE ENERGY CO LTD
- Filing Date
- 2026-02-06
- Publication Date
- 2026-06-02
AI Technical Summary
In multi-layer stacked battery pack structures, the strength of the connection points of the casing is low, making them prone to deformation or damage, and traditional connection methods are not convenient for modular maintenance.
Fasteners are used to connect the individual housing units, and first, second, and third protrusions are provided at the connection points for reinforcement. The connection strength is enhanced by the cooperation between the protrusions and the fasteners. At the same time, seals and reinforcing ribs are designed to improve stability and sealing.
The strength of the connection points of the enclosure has been improved to prevent deformation and damage, enabling convenient modular maintenance and overall stability of the battery pack, while reducing production costs.
Smart Images
Figure CN122136557A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a housing structure, a battery pack, and an electrical device. Background Technology
[0002] To improve the driving range and space utilization of new energy vehicles, battery packs are developing towards higher energy density and modularity. Multi-layer stacked battery pack structures can effectively utilize vertical space and have higher energy density.
[0003] Multi-layer stacked battery pack structures often include multiple stacked boxes. In order to reduce the weight of the boxes and improve the production efficiency of the boxes, some related technologies use casting processes to manufacture the boxes. However, when multiple boxes are connected, the strength of the connection points is low, and the connection points are prone to deformation or even damage. Summary of the Invention
[0004] This application provides a housing structure, a battery pack, and an electrical device to at least partially solve the above-mentioned technical problems.
[0005] To achieve the above objectives, according to a first aspect of this application, a housing structure is provided, comprising: fasteners and a plurality of housing units, wherein the plurality of housing units are arranged along the height direction of the housing structure. The aforementioned housing unit includes: The housing includes a first connecting part and a second connecting part, which are arranged along the height direction of the housing structure. A first protrusion is connected to the side of the first connecting portion facing the second connecting portion; The second connecting part has a first connecting hole. In any two adjacent box units, the second connecting part of one box unit abuts against the first connecting part of the other box unit. The fastener passes through the first connecting hole of one box unit and is connected to the first connecting part and the first protrusion of the other box unit.
[0006] In this embodiment, a fastener is inserted through a first connecting hole in one housing unit and connected to a first connecting portion and a first protrusion in another housing unit, thereby connecting two adjacent housing units. However, the opening of the first connecting hole reduces the strength of the connection between the two adjacent housing units. By providing a first protrusion on the side of the first connecting portion facing the second connecting portion, the first connecting portion can be strengthened. When the fastener secures the two adjacent housing units, the fastener can be sequentially inserted through the second connecting portion of one housing unit, the first connecting portion of the other housing unit, and the first protrusion. The first protrusion strengthens the connection position where the fastener is located, thus strengthening the connection position between the two adjacent housing units, better meeting the connection strength requirements, and making the connection position less prone to deformation or damage.
[0007] Furthermore, by fastening adjacent individual units with fasteners, when it is necessary to inspect or replace the battery module in a specific level of individual unit, it is only necessary to remove the fasteners on the top and bottom rings of that level of individual unit to separate that level, thus realizing modular maintenance and improving maintenance convenience.
[0008] Optionally, one of the housing units further includes a second protrusion, which is connected to the side of the second connecting portion facing away from the first connecting portion of the housing unit, and the second protrusion is disposed around the first connecting hole of the housing unit.
[0009] The second protrusion reinforces the position of the first connecting hole in the second connecting part, making the second connecting part less prone to deformation under stress. After the box structure is assembled, fasteners pass through the first connecting holes in the second connecting parts of one box unit and the second connecting holes in the first connecting parts of another box unit. The second protrusion is located on the periphery of the fastener, thus reinforcing the connection position between adjacent box units and better meeting the connection strength requirements, making the connection position less prone to deformation or damage.
[0010] Optionally, one of the housing units is further provided with a second connecting hole, the second connecting hole passing through the first connecting portion and the first protrusion, and the housing unit further includes a third protrusion, the third protrusion being connected to the side of the first connecting portion facing the second connecting portion, and the third protrusion being disposed on the periphery of the second connecting hole.
[0011] The third protrusion reinforces the position of the second connecting hole in the first connecting part, making the second connecting hole less prone to deformation under stress. After the box structure is assembled, fasteners pass through the first connecting holes in the second connecting parts of one box unit and the second connecting holes in the first connecting parts of another box unit. The third protrusion is located on the periphery of the fastener, thus reinforcing the connection position between adjacent box units, better meeting the connection strength requirements, and making the connection position less prone to deformation or damage.
[0012] Optionally, the third protrusion forms a groove with the first connecting portion. The groove has an inner space and an opening arranged along the height direction of the box structure. The inner space is adapted to the second protrusion.
[0013] The groove space is adapted to the second protrusion, meaning the shape of the groove space and the shape of the second protrusion are adapted to each other. In this way, when the second protrusion is located in the groove space, the groove can limit the movement of the second protrusion.
[0014] Optionally, the groove includes a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall connected in sequence. The first sidewall and the third sidewall are arranged along the length direction of the box structure, and the second sidewall and the fourth sidewall are arranged along the width direction of the box structure.
[0015] This configuration limits the second protrusion along the length of the box structure via the first and third side walls. It also limits the second protrusion along the width of the box structure via the second and fourth side walls. This further restricts the movement of individual box units, making it difficult for adjacent assembled box units to move along the length or width of the box structure.
[0016] Optionally, the groove includes a bottom wall, and in two adjacent housing units, the bottom wall of one housing unit is disposed opposite to the second connecting portion of the other housing unit.
[0017] When the second protrusion of one box unit is located in the groove space of another box unit, the box unit can be limited along the height direction of the box structure through the first connecting part of one box unit and the bottom wall of the other box unit.
[0018] Optionally, it also includes a seal, wherein in two adjacent housing units, the seal is sandwiched between a first connecting portion of one housing unit and a second connecting portion of the other housing unit.
[0019] In two adjacent unit boxes, the sealing element is sandwiched between the first connecting part of one unit box and the second connecting part of the other unit box. This can seal the connection between the two adjacent unit boxes, ensuring that the internal space of the unit box is isolated from the outside, and preventing moisture, dust, etc. from entering.
[0020] Optionally, the first connecting portion has a sealing groove on the side opposite to the second connecting portion for installing the sealing element.
[0021] Optionally, the second connecting portion has a sealing groove on the side opposite to the first connecting portion for installing the sealing element.
[0022] The sealing groove is used to install seals, thus limiting the seal's movement and making it easier for the operator to install it in the correct position. When fasteners tighten adjacent housing units, the two housing layers are compressed together, and the seal within the sealing groove deforms under pressure, achieving a seal.
[0023] Optionally, one of the housing units includes a reinforcing rib, wherein the opposite ends of the reinforcing rib are respectively connected to the first connecting portion and the second connecting portion, and the reinforcing rib is disposed close to the fastener.
[0024] The connection position of the fastener can be strengthened by reinforcing ribs. In other words, the connection position between two adjacent box units can be strengthened by the first protrusion, which can better meet the connection strength and make the connection position less prone to deformation and damage.
[0025] Optionally, one of the box-shaped units includes a plurality of the reinforcing ribs, which are arranged along the length of the box structure. In one of the box-shaped units, at least two of the reinforcing ribs, the first connecting portion, and the second connecting portion form a cavity, and at least a portion of the fasteners are located within the cavity.
[0026] Multiple reinforcing ribs are arranged along the length of the box structure, which can strengthen the box structure in the longitudinal direction. At least part of the fasteners are located inside the cavity, specifically, the part of the fastener extending out of the second connection hole of another box unit is located inside the cavity. This arrangement makes the fasteners less susceptible to external pressure.
[0027] Optionally, the distance L1 between any two adjacent reinforcing ribs can be less than or equal to 100mm. This arrangement provides better support and reinforcement.
[0028] Optionally, one of the housing units further includes a connector, which includes a first connecting end and a second connecting end opposite to each other. The first connecting end is connected to the first protrusion, and the second connecting end is connected to the reinforcing rib. The connector is spaced apart from the first connecting portion.
[0029] The force applied to the fastener is transmitted to the first protrusion, and then through the first connecting end and the second connecting end to the reinforcing ribs on both sides. The connector and the first connecting part are spaced apart, so that the force on the first protrusion on both sides of the connector is balanced, and stress concentration is less likely to occur.
[0030] Optionally, the housing unit is a die-cast housing.
[0031] In these embodiments, the housing unit can be a die-cast housing. Compared to sheet metal housings or profile housings, die-cast housings can reduce housing weight and improve production efficiency. Furthermore, since die-cast housings are formed through a die-casting process, the various structures within the housing unit can be easily cast, allowing for the creation of structures of various shapes, such as a first protrusion. Compared to housing units formed by splicing or welding sheet metal, die-cast housings eliminate splicing processes, resulting in higher production efficiency and lower costs.
[0032] In one of the aforementioned housing units, the second connecting portion has multiple first connecting holes, and the distance between any two adjacent first connecting holes ranges from 50mm to 200mm. This arrangement allows for a tight connection between adjacent housing units, while also preventing deformation at the connection point between the fasteners and the housing unit.
[0033] According to a second aspect of this application, a battery pack is provided, including the aforementioned housing structure.
[0034] According to a third aspect of this application, an electrical device is also provided, including the aforementioned housing structure or the aforementioned battery pack.
[0035] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0036] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.
[0037] Figure 1 This is a first-view structural schematic diagram of the box structure provided in an exemplary embodiment of this disclosure; Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 yes Figure 1 Enlarged schematic diagram of part B; Figure 4 This is a second-view structural schematic diagram of the box structure provided in an exemplary embodiment of this disclosure; Figure 5 yes Figure 4 An enlarged schematic diagram of section C; Figure 6 This is a first cross-sectional view of a single box unit provided in an exemplary embodiment of this disclosure; Figure 7 yes Figure 6 An enlarged schematic diagram of section D in the middle; Figure 8 yes Figure 6 An enlarged schematic diagram of section E in the middle; Figure 9 This is a second cross-sectional view of the housing unit provided in an exemplary embodiment of this disclosure; Figure 10 yes Figure 9 Enlarged schematic diagram of section F in the middle; Figure 11 yes Figure 9 Enlarged schematic diagram of section G in the middle; Figure 12 This is a third cross-sectional view of the box unit provided in an exemplary embodiment of this disclosure; Figure 13 yes Figure 12 Enlarged schematic diagram of section H in the middle; Figure 14 This is a block diagram of an electrical device provided in an exemplary embodiment of this disclosure.
[0038] Explanation of reference numerals in the attached figures: x: length of the box structure; y: width of the box structure; z: height of the box structure; 1. Box structure; 10. Fasteners; 20. Box body unit; 21. Second connecting hole; 23. First connecting hole; 25. Cavity; 30. Housing; 31. First connecting part; 33. Second connecting part; 35. Main body; 351. Main body side wall; 353. Main body bottom wall; 355. Mounting cavity; 50. The first convex part; 60. Second protrusion; 61. Groove; 611. Space inside the groove; 613. Groove opening; 615. First sidewall; 616. Second sidewall; 617. Third sidewall; 618. Fourth sidewall; 619. Bottom wall; 70. The third convex part; 81. Seal; 83. Sealing groove; 91. Reinforcing rib; 93. Connector; 931. First connecting end; 933. Second connecting end; 2. Battery pack; 201. Battery module; 3. Electrical equipment. Detailed Implementation
[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.
[0040] Please combine Figure 1 In a first aspect, embodiments of this application provide a box structure 1, which includes fasteners 10 and a plurality of box units 20. The plurality of box units 20 are arranged along the height direction z of the box structure. In other words, the box structure 1 includes a plurality of box units 20 arranged along the height direction z of the box structure. The plurality of box units 20 are connected together by fasteners 10. Specifically, the box units 20 of adjacent two layers are connected by fasteners 10, thereby realizing the connection of the plurality of box units 20 by the plurality of fasteners 10. That is, the local connection between the box units 20 of adjacent two layers is completed by the fasteners 10.
[0041] In some examples, such as Figure 1 The box structure 1 includes four box units 20. From top to bottom, the topmost box unit 20 is the first layer box unit 20. The bottom of the first layer box unit 20 is connected to the top of the second layer box unit 20 below it by fasteners 10. The bottom of the second layer box unit 20 is connected to the top of the third layer box unit 20 below it by fasteners 10. The bottom of the third layer box unit 20 is connected to the top of the fourth layer box unit 20 below it by fasteners 10.
[0042] In some examples, fastener 10 can be a bolt, and the fastener 10 is screwed to the housing 30. The second connecting hole 21 can be a threaded hole, which can be a threaded hole formed by direct tapping or a threaded hole formed by pre-embedded wire thread inserts or threaded inserts. The bolt face thickness can be 6mm.
[0043] Fastener 10 can be a short bolt, specifically an M12 standard bolt. In some embodiments, the length of fastener 10 can range from 15mm to 30mm, for example, the length can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm.
[0044] The number of individual box units 20 can be two or more, for example, the number of individual box units 20 can be two, three, four, five, or six.
[0045] Unless otherwise specified, the structures of multiple unit boxes 20 are basically the same. The following is a detailed description of the structure of only one unit box 20.
[0046] Please combine Figure 2 as well as Figure 3 A single box unit 20 includes a box body 30 and a first protrusion 50. The box body 30 includes a first connecting portion 31 and a second connecting portion 33. The first connecting portion 31 and the second connecting portion 33 are arranged along the height direction z of the box structure. In some embodiments, when multiple box units 20 are arranged along the height direction z of the box structure, the second connecting portion 33 of one box unit 20 is located below the first connecting portion 31. In two adjacent layers of box units 20, from top to bottom, they are: the first connecting portion 31 and the second connecting portion 33 of one box unit 20; and the first connecting portion 31 and the second connecting portion 33 of the other box unit 20.
[0047] Please combine Figure 6 , Figure 7 as well as Figure 8 In the same housing unit 20, the first protrusion 50 is connected to the side of the first connecting part 31 facing the second connecting part 33. The second connecting part 33 has a first connecting hole 23. In any two adjacent housing units 20... Please refer to... Figure 3 The second connecting part 33 of one box unit 20 abuts against the first connecting part 31 of another box unit 20. The fastener 10 passes through the first connecting hole 23 of one box unit 20 and is connected to the first connecting part 31 and the first protrusion 50 of the other box unit 20, so as to fasten the two adjacent box units 20.
[0048] In this embodiment, a fastener 10 is inserted through the first connecting hole 23 of one housing unit 20 and connected to the first connecting portion 31 and the first protrusion 50 of another housing unit 20, thereby connecting two adjacent housing units 20. The opening of the first connecting hole 23 reduces the strength of the connection position between the two adjacent housing units 20. By providing the first protrusion 50 on the side of the first connecting portion 31 facing the second connecting portion 33, the first connecting portion 31 can be strengthened. When the fastener 10 fastens the two adjacent housing units 20, the fastener 10 can be sequentially inserted through the second connecting portion 33 of one housing unit 20, the first connecting portion 31 of the other housing unit 20, and the first protrusion 50. The first protrusion 50 can strengthen the connection position where the fastener 10 is located, that is, the first protrusion 50 strengthens the connection position between the two adjacent housing units 20, which can better meet the connection strength and make the connection position less prone to deformation and damage.
[0049] In addition, by fastening two adjacent housing units 20 with fasteners 10, when it is necessary to inspect or replace the battery module 201 in a specific housing unit 20, it is only necessary to remove the fasteners 10 of the upper and lower rings of the housing unit 20 at that level to separate the level, realizing modular maintenance and improving maintenance convenience.
[0050] Please combine Figure 4 , Figure 5 as well as Figure 14 In some embodiments, the housing 30 may further include a main body 35, which may include a connected main body sidewall 351 and a main body bottom wall 353. The main body sidewall 351 and the main body bottom wall form a mounting cavity 355 for mounting the battery module 201. In some embodiments, at least one battery module 201 is mounted in the mounting cavity 355 of each housing unit 20, and multiple battery modules 201 are mounted in multiple housing units 20, thereby achieving the stacking of multiple battery modules 201 along the height direction z of the housing structure.
[0051] In some embodiments, the first connecting portion 31 and the second connecting portion 33 are respectively connected to the outer periphery of the main body sidewall 351. The first connecting portion 31 and the second connecting portion 33 may be integrally cast with the main body sidewall 351.
[0052] Please combine Figure 3In the same housing unit 20, the height L3 of the first protrusion 50 can, in some examples, be the distance between the end face of the first protrusion 50 away from the first connecting part 31 and the surface of the first connecting part 31 facing the second connecting part 33. The value of L3 can be in the range of 5mm-8mm. For example, in the same housing unit 20, the distance between the end face of the first protrusion 50 away from the first connecting part 31 and the surface of the first connecting part 31 facing the second connecting part 33 can be 5mm, 6mm, 7mm, or 8mm, thereby enabling the connection between the fastener 10 and the housing 30 to have high connection strength and reliability.
[0053] There can be multiple fasteners 10, and the multiple fasteners 10 can be arranged along the length x direction of the box structure.
[0054] This configuration, through the connection method of fasteners 10 distributed at multiple points, ensures that the interlayer mating surfaces of adjacent two-layer box units 20 are subjected to uniform force, thereby improving the overall rigidity and stability of the stacked box units 20.
[0055] In some embodiments, to further improve the connection strength and sealing performance, the housing structure 1 may include an adhesive layer, which is disposed between two adjacent housing units 20. Specifically, structural adhesive may be applied at the interlayer mating surface between two adjacent housing units 20.
[0056] Please combine Figure 8 The housing unit 20 also includes a second protrusion 60, which is connected to the side of the second connecting portion 33 facing away from the first connecting portion 31 of the housing unit 20. The second protrusion 60 is disposed around the first connecting hole 23 of the housing unit 20.
[0057] The second protrusion 60 can reinforce the position where the first connecting hole 23 of the second connecting part 33 is opened, so that the second connecting part 33 is not easily deformed when subjected to force. After the box structure 1 is assembled, the fastener 10 passes through the first connecting hole 23 of the second connecting part 33 of one box unit 20 and the first connecting part 31 and the first protrusion 50 of another box unit 20. The second protrusion 60 is also located on the periphery of the fastener 10. That is, the second protrusion 60 strengthens the connection position of the two adjacent box units 20, which can better meet the connection strength and make the connection position less prone to deformation and damage.
[0058] Please combine Figure 7 In some embodiments, one of the housing units 20 is further provided with a second connecting hole 21, which passes through the first connecting portion 31 and the first protrusion 50.
[0059] In some embodiments, the second connecting portion 33 of one housing unit 20 abuts against the first connecting portion 31 of another housing unit 20. The fastener 10 can be a fastener that passes through the first connecting hole 23 in the second connecting portion 33 of one housing unit 20 and the second connecting hole 21 in the first connecting portion 31 of the other housing unit 20 from top to bottom, thereby securing the two adjacent housing units 20 and pressing the two housing layers 30 together. The fastener 10 can be a bolt, and the second connecting hole 21 can be a threaded hole, allowing multiple bolts to lock and connect the two adjacent housing units 20 together. The second connecting hole 21 can be a through hole.
[0060] To facilitate the fastener 10 passing through the first connecting hole 23 of one housing unit 20 and the second connecting hole 21 of another housing unit 20 to fasten adjacent housing units 20, the second connecting hole 21 and the first connecting hole 23 of each housing unit 20 can be correspondingly set, and the second connecting hole 21 and the first connecting hole 23 of multiple housing units 20 can be correspondingly set, wherein the projection of the second connecting hole 21 onto the first connecting hole 23 can coincide along the height direction z of the housing unit 20.
[0061] Please combine Figure 7 The housing unit 20 also includes a third protrusion 70, which is connected to the side of the first connecting part 31 facing the second connecting part 33. The third protrusion 70 is disposed on the periphery of the second connecting hole 21 of the housing unit 20.
[0062] The third protrusion 70 can strengthen the position of the second connecting hole 21 of the housing unit 20, so that the second connecting hole 21 is not easily deformed when subjected to force.
[0063] In some examples, after the housing structure 1 is assembled, the fastener 10 passes through the first connection hole 23 opened in the second connection part 33 of one housing unit 20 and the second connection hole 21 opened in the first connection part 31 of another housing unit 20. The third protrusion 70 is also located on the periphery of the fastener 10. That is, the connection position of the two adjacent housing units 20 is strengthened by the third protrusion 70, which can better meet the connection strength and make the connection position less prone to deformation and damage.
[0064] The third protrusion 70 and the first protrusion 50 can be spaced apart, which can strengthen this area without increasing the weight of the box structure 1 too much.
[0065] The third protrusion 70 and the first connecting part 31 can form a groove 61. The groove 61 has a groove space 611 and a groove opening 613 arranged along the height direction z of the box structure. The groove space 611 is adapted to the second protrusion 60.
[0066] During installation, in two adjacent housing units 20, the second protrusion 60 of the upper housing unit 20 can be inserted from the slot 613 into the slot space 611 of the lower housing unit 20. This achieves the limiting of the two adjacent housing units 20, resulting in better integrity and consistency of the two housing units 20 and reducing the shearing force on the fasteners 10.
[0067] The groove space 611 is adapted to the second protrusion 60, meaning the shape of the groove space 611 and the shape of the second protrusion 60 are adapted to each other. In this way, when the second protrusion 60 is located in the groove space 611, the groove 61 can limit the second protrusion 60.
[0068] Please combine Figure 7 , Figure 9 as well as Figure 10 The groove 61 includes a first side wall 615, a second side wall 616, a third side wall 617, and a fourth side wall 618 connected in sequence. The first side wall 615 and the third side wall 617 are arranged along the length direction x of the box structure, and the second side wall 616 and the fourth side wall 618 are arranged along the width direction y of the box structure.
[0069] This configuration limits the second protrusion 60 along the length x-direction of the box structure via the first sidewall 615 and the third sidewall 617. It also limits the second protrusion 60 along the width y-direction of the box structure via the second sidewall 616 and the fourth sidewall 618. This further limits the positioning of the box unit 20, making it difficult for adjacent assembled box units 20 to move along the length x-direction or the width y-direction of the box structure.
[0070] Please combine Figure 3 , Figure 10 and Figure 11 The groove 61 includes a bottom wall 619. In two adjacent box units 20, the bottom wall 619 of one box unit 20 is disposed opposite to the second connecting part 33 of the other box unit 20.
[0071] In some embodiments, when multiple housing units 20 are arranged along the height direction z of the housing structure, the second connecting portion 33 of one housing unit 20 is located below the first connecting portion 31. In two adjacent housing units 20, from top to bottom, the following are arranged sequentially: the first connecting portion 31 and the second connecting portion 33 of one housing unit 20; and the first connecting portion 31 and the second connecting portion 33 of another housing unit 20. The second connecting portion 33 of one housing unit 20 abuts against the first connecting portion 31 of another housing unit 20. Fasteners 10 pass through the first connecting hole 23 in the second connecting portion 33 of one housing unit 20 and the second connecting hole 21 in the first connecting portion 31 of another housing unit 20, thereby securing the two adjacent housing units 20.
[0072] When the second protrusion 60 of one box unit 20 is located in the groove space 611 of another box unit 20, the box unit 20 can be limited along the height direction z of the box structure by the second connecting part 33 of one box unit 20 and the bottom wall 619 of the other box unit 20.
[0073] Please combine Figure 12 as well as Figure 13 The housing structure 1 also includes a sealing element 81. In two adjacent housing units 20, the sealing element 81 is sandwiched between the first connecting part 31 of one housing unit 20 and the second connecting part 33 of the other housing unit 20.
[0074] In two adjacent box units 20, the sealing element 81 is sandwiched between the first connecting part 31 of one box unit 20 and the second connecting part 33 of the other box unit 20. This can seal the connection between the two adjacent box units 20, ensuring that the internal space of the box unit 20 is isolated from the outside and is not easy to get in water vapor, dust, etc.
[0075] In some examples, in any two adjacent housing units 20, the first connecting portion 31 of one housing unit 20 abuts against the second connecting portion 33 of the other housing unit 20. Fasteners 10 pass through the first connecting hole 23 of one housing unit 20 and the second connecting hole 21 of the other housing unit 20 to secure the two adjacent housing units 20. A sealing element 81 is also sandwiched between the two housing units 20. When the fasteners 10 secure the two adjacent housing units 20, they can compress the two housing layers 30, causing the sealing element 81 to deform under pressure and achieve a seal. The sealing element 81 can specifically be a sealing ring.
[0076] In these embodiments, the preload provided by the fastener 10 can act directly and uniformly on the seal 81, making the compression of the seal 81 easy to control and maintain, thereby making the sealing connection between the two housing units 20 more reliable.
[0077] In some embodiments, in a single housing unit 20, a sealing groove 83 may be provided on the side of the first connecting part 31 away from the second connecting part 33 for installing a sealing element 81.
[0078] In these embodiments, when the seal 81 is installed, a sealing groove 83 is provided on the top of the housing unit 20. Thus, when multiple housing units 20 are stacked and connected by fasteners 10, the fasteners 10 are installed on the outer periphery of the sealing groove 83, that is, on the side of the sealing groove 83 away from the battery module 201.
[0079] In some embodiments, in a single housing unit 20, a sealing groove 83 may be provided on the side of the second connecting part 33 opposite to the first connecting part 31 for installing a sealing element 81.
[0080] The sealing groove 83 can be used to install the seal 81. The sealing groove 83 limits the seal 81, making it difficult for the seal 81 to move and making it easy for the operator to install the seal 81 in the correct position. When the fastener 10 tightens the two adjacent housing units 20, it can press the two housings 30 together, and the seal 81 set in the sealing groove 83 is deformed under pressure to achieve a seal.
[0081] In some embodiments, the housing unit 20 is a die-cast housing. The housing unit 20 can be obtained by a die-casting process. In some examples, the housing unit 20 is a cast aluminum housing.
[0082] In these embodiments, the housing unit 20 can be a die-cast housing. Compared to sheet metal housings or profile housings, die-cast housings can reduce housing weight and improve production efficiency. Furthermore, since die-cast housings are formed through a die-casting process, the various structures within the housing unit 20 can be easily cast, allowing for the creation of structures of various shapes, such as the first protrusion 50. Compared to housing units 20 formed by splicing or welding sheet metal, die-cast housings eliminate splicing processes, resulting in higher production efficiency and lower costs.
[0083] However, traditional die-cast housings have relatively low strength. Taking aluminum as an example, the strength of cast aluminum is lower than that of profiled aluminum. Therefore, profiled aluminum housings inherently possess high strength and do not require reinforcement to maintain this strength. In contrast, cast aluminum housings have lower inherent strength and are prone to deformation or damage. Deformation is even more likely when the housing unit 20 has openings. One of the problems to be solved in these embodiments of this application is the low strength at the connection points between adjacent housing units 20 in the die-cast housing, which makes them susceptible to deformation or damage. To enable housing units to have both light weight and high strength, and to prevent deformation at the connections between multiple housing units, the embodiments of this application include: Firstly, a first protrusion 50 is provided on the side of the first connecting part 31 facing the second connecting part 33. The first protrusion 50 strengthens the connection position where the fastener 10 is located, that is, it strengthens the connection position of the two adjacent housing units 20, which can better meet the connection strength and make the connection position less prone to deformation or damage. In this way, the overall lightweight design of the housing unit 20 can be achieved while meeting the connection strength requirements.
[0084] Secondly, the second protrusion 60 can strengthen the position of the first connecting hole 23 of the second connecting part 33, making the second connecting part 33 less prone to deformation when subjected to force.
[0085] Thirdly, the third protrusion 70 can strengthen the position where the second connecting hole 21 of the first connecting part 31 is located, making the second connecting hole 21 less prone to deformation under stress. The third protrusion 70 is spaced apart from the first protrusion 50, so that this position can be strengthened without excessively increasing the weight of the box structure 1.
[0086] Fourthly, the third protrusion 70 and the first connecting part 31 form a groove 61. The groove 61 has an inner space 611 and a slot 613 arranged along the height direction z of the box structure. The inner space 611 is adapted to the second protrusion 60. In this way, in two adjacent box units 20, the second protrusion 60 of the upper box unit 20 can be inserted into the inner space 611 of the lower box unit 20 through the slot 613. This achieves the limiting of the two adjacent box units 20, making the integrity and consistency of the two box units 20 better and reducing the shearing force on the fastener 10.
[0087] Furthermore, in order to enable the box unit to have both light weight and high strength, and to prevent deformation at the connection of multiple box units, in this embodiment of the application, a box unit 20 may also include a reinforcing rib 91. In a box unit 20, the opposite ends of the reinforcing rib 91 are respectively connected to the first connecting part 31 and the second connecting part 33, and the reinforcing rib 91 is disposed close to the fastener 10.
[0088] The connection position of the fastener 10 can be strengthened by the reinforcing rib 91, that is, the connection position of the two adjacent box units 20 can be strengthened by the first protrusion 50, which can better meet the connection strength and make the connection position less prone to deformation and damage.
[0089] In some examples, the reinforcing rib 91 may include a first end, a second end, and a middle portion. The first end and the second end are arranged opposite each other, and the middle portion connects the first end and the second end. In a housing unit 20, the first end is connected to a first connecting portion 31, the second end is connected to a second connecting portion 33, and the middle portion is connected to the main body side wall 351 of the housing unit 20 body 35. This arrangement allows the force at the connection location of the fastener 10 to be transmitted to the main body side wall 351, so that the housing as a whole can better bear the force on the connection location of the fastener 10.
[0090] Each housing unit 20 includes a plurality of reinforcing ribs 91, which are arranged along the length x of the housing structure. In a housing unit 20, at least two reinforcing ribs 91, a first connecting part 31 and a second connecting part 33 form a cavity 25, and at least a portion of the fasteners 10 are located inside the cavity 25.
[0091] Multiple reinforcing ribs 91 are arranged along the length x of the box structure, which can strengthen the box structure in the length x direction. At least part of the fastener 10 is located in the cavity 25. Specifically, the part of the fastener 10 that extends out of the second connection hole 21 of another box unit 20 is located in the cavity 25. This arrangement makes the fastener 10 less susceptible to external pressure.
[0092] The distance L1 between any two adjacent reinforcing ribs 91 can be less than or equal to 100mm. This arrangement provides better support and reinforcement.
[0093] The distance L1 between any two adjacent reinforcing ribs 91 should be greater than or equal to the width of the fastener 10, so that the fastener 10 can fit between the two adjacent reinforcing ribs 91. In some examples, the width of the fastener 10 is 60 mm, then the value of the distance L1 between any two adjacent reinforcing ribs 91 can be in the range of 60 mm to 100 mm, for example, 60 mm, 61 mm, 70 mm, 80 mm, 90 mm, or 100 mm.
[0094] A single box unit 20 includes a connector 93, which includes a first connecting end 931 and a second connecting end 933. The first connecting end 931 is connected to the first protrusion 50, and the second connecting end 933 is connected to the reinforcing rib 91. The connector 93 and the first connecting part 31 are spaced apart.
[0095] When the fastener 10 is subjected to force, it is transmitted to the first protrusion 50, and then through the first connecting end 931 and the second connecting end 933 to the reinforcing ribs 91 on both sides. The connector 93 and the first connecting part 31 are spaced apart, so that the first protrusion 50 located on both sides of the connector 93 is subjected to force evenly, and the problem of stress concentration is not easy to occur.
[0096] Please combine Figure 3 The relationship between the height L3 of the first protrusion 50 and the interval L4 between the connector 93 and the first connecting part 31 can be: L4 is greater than or equal to 0.5L3, and L4 is less than or equal to 0.5L3. Specifically, L3, L4 equals 0.5L3, or L4 equals 0.6L3, or L4 equals... L3. When L4 is less than 0.5L3, the connector 93 is not easy to form during casting demolding and is prone to deformation or breakage.
[0097] In the aforementioned housing unit 20, the second connecting part 33 is provided with a plurality of first connecting holes 23, and the distance between any two adjacent first connecting holes 23 is in the range of 50mm-200mm.
[0098] This design allows for a tight connection between adjacent individual units, while also preventing deformation at the connection points between the fasteners and the individual units.
[0099] The distance between any two adjacent first connecting holes 23 can be 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, or 200mm.
[0100] In some examples, the distance between any two adjacent first connecting holes 23 can be the distance between the centers of any two adjacent first connecting holes 23.
[0101] In some examples, the diameter of the first connecting hole 23 can be 12 mm. The fastener can specifically be an M12 bolt with a nominal diameter of 12 mm.
[0102] A battery pack 2 includes the aforementioned housing structure 1. The battery pack 2 possesses all the beneficial effects of the aforementioned housing structure 1, which will not be elaborated further herein.
[0103] An electrical device 3 includes the aforementioned housing structure 1 or the aforementioned battery pack 2. The electrical device 3 possesses all the beneficial effects of the aforementioned housing structure 1 or the aforementioned battery pack 2, which will not be elaborated further herein.
[0104] It is understood that electrical equipment includes, but is not limited to, electric toys, power tools, electric vehicles, automobiles, 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. Automobiles can include gasoline-powered cars, natural gas-powered cars, and new energy vehicles.
[0105] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0106] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0107] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.
[0108] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. A box structure (1), characterized in that, Includes fasteners (10) and multiple housing units (20), the multiple housing units (20) being arranged along the height direction (z) of the housing structure. One of the aforementioned housing units (20) includes: The housing (30) includes a first connecting part (31) and a second connecting part (33), wherein the first connecting part (31) and the second connecting part (33) are arranged along the height direction (z) of the housing structure; The first protrusion (50) is connected to the side of the first connecting portion (31) facing the second connecting portion (33); The second connecting part (33) is provided with a first connecting hole (23). In any two adjacent box units (20), the second connecting part (33) of one box unit (20) abuts against the first connecting part (31) of the other box unit (20). The fastener (10) passes through the first connecting hole (23) of one box unit (20) and is connected to the first connecting part (31) and the first protrusion (50) of the other box unit (20).
2. The box structure (1) according to claim 1, characterized in that, The housing unit (20) further includes a second protrusion (60), which is connected to the side of the second connecting part (33) facing away from the first connecting part (31) of the housing unit. The second protrusion (60) is disposed around the first connecting hole (23) of the housing unit.
3. The box structure (1) according to claim 2, characterized in that, The box unit (20) is also provided with a second connecting hole (21), which passes through the first connecting part (31) and the first protrusion (50). The box unit (20) also includes a third protrusion (70), which is connected to the side of the first connecting part (31) facing the second connecting part (33). The third protrusion (70) is disposed on the periphery of the second connecting hole (21) of the box unit (20).
4. The box structure (1) according to claim 3, characterized in that, The third protrusion (70) and the first connecting part (31) form a groove (61). The groove (61) has an inner space (611) and a slot (613) arranged along the height direction (z) of the box structure. The inner space (611) is adapted to the second protrusion (60).
5. The box structure (1) according to claim 4, characterized in that, The groove (61) includes a first sidewall (615), a second sidewall (616), a third sidewall (617), and a fourth sidewall (618) connected in sequence. The first sidewall (615) and the third sidewall (617) are arranged along the length direction (x) of the box structure, and the second sidewall (616) and the fourth sidewall (618) are arranged along the width direction (y) of the box structure.
6. The box structure (1) according to claim 4, characterized in that, The groove (61) includes a bottom wall (619). In two adjacent box units (30), the bottom wall (619) of one box unit (30) is disposed opposite to the second connecting part (33) of the other box unit (30).
7. The box structure (1) according to claim 1, characterized in that, It also includes a sealing element (81), which is sandwiched between a first connecting part (31) of one box unit (20) and a second connecting part (33) of the other box unit (20) in two adjacent box units (30).
8. The box structure (1) according to claim 7, characterized in that, In one of the aforementioned housing units (20), the first connecting portion (31) has a sealing groove (83) on the side opposite to the second connecting portion (33) for installing the sealing element (81); and / or The second connecting part (33) has a sealing groove (83) on the side opposite to the first connecting part (31) for installing the sealing element (81).
9. The box structure (1) according to claim 1, characterized in that, One of the box units (20) includes a reinforcing rib (91). In one of the box units (20), the two ends of the reinforcing rib (91) are respectively connected to the first connecting part (31) and the second connecting part (33). The reinforcing rib (91) is disposed close to the fastener (10).
10. The box structure (1) according to claim 9, characterized in that, A single box assembly (20) includes a plurality of reinforcing ribs (91), which are arranged along the length direction (x) of the box structure. In a single box assembly (20), at least two reinforcing ribs (91), the first connecting portion (31) and the second connecting portion (33) form a cavity (25), and at least a portion of the fasteners (10) are located in the cavity (25).
11. The box structure (1) according to claim 9, characterized in that, The range of the distance L1 between any two adjacent reinforcing ribs (91) is: L1 is less than or equal to 100mm.
12. The box structure (1) according to claim 9, characterized in that, The box body unit (20) further includes a connector (93), the connector (93) includes a first connecting end (931) and a second connecting end (933) opposite to each other, the first connecting end (931) is connected to the first protrusion (50), the second connecting end (933) is connected to the reinforcing rib (91), and the connector (93) is spaced apart from the first connecting part (31).
13. The box structure (1) according to any one of claims 1 to 12, characterized in that, The box unit (20) is a die-cast box.
14. The box structure (1) according to any one of claims 1 to 12, characterized in that, In one of the box units (20), the second connecting part (33) is provided with a plurality of first connecting holes (23), and the distance between any two adjacent first connecting holes (23) is in the range of 50mm-200mm.
15. A battery pack (2), characterized in that, Includes the box structure (1) as described in any one of claims 1-14.
16. An electrical appliance (3), characterized in that, Includes the housing structure (1) as described in any one of claims 1-14 or the battery pack (2) as described in claim 15.