Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a plurality of single batteries, a plurality of box bodies and a first locking piece, the single batteries are contained in the box bodies, the box bodies comprise the first box body and the second box body, and the first box body and the second box body are arranged in a stacked mode in the first direction; the end, close to the second box body in the first direction, of the first box body is provided with a first positioning part, the first positioning part is arranged along the periphery of the first box body, the end, close to the first box body, of the second box body in the first direction is provided with a second positioning part, and the second positioning part is arranged along the periphery of the second box body. The first positioning part and the second positioning part are matched and connected along a first direction; at least part of the first locking piece wraps the first positioning part and the second positioning part, and the first locking piece is connected with the first box body and the second box body. The reliability of the battery device can be improved.

Description

Technical Field

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

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] In the development of battery technology, improving the reliability of battery devices is a key research direction. Utility Model Content

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

[0005] In a first aspect, this application provides a battery device, including a plurality of battery cells, a plurality of housings, and a first locking member. The plurality of battery cells are housed in the plurality of housings. The plurality of housings include a first housing and a second housing. The first housing and the second housing are stacked along a first direction. The first housing has a first positioning portion at one end along the first direction near the second housing. The first positioning portion is arranged along the outer periphery of the first housing. The second housing has a second positioning portion at one end along the first direction near the first housing. The second positioning portion is arranged along the outer periphery of the second housing. The first positioning portion and the second positioning portion are connected in a cooperating manner along the first direction. At least a portion of the first locking member covers the first positioning portion and the second positioning portion and is connected to both the first housing and the second housing.

[0006] In this embodiment, the first housing and the second housing cooperate along the first direction through the first positioning part and the second positioning part to achieve positioning guidance during stacking and reduce assembly deviation; the first locking part covers the first positioning part and the second positioning part and connects to the first housing and the second housing. Compared with the traditional bolt direct connection of the housing, the number of bolts used is reduced, and the covering connection increases the connection area and improves the connection stability; the first positioning part and the second positioning part cooperate with the first locking part to form a multi-seal structure, reducing the channels for external moisture and dust to enter the housing, improving the sealing performance, protecting the internal battery cells, and improving the reliability of the battery device.

[0007] In some alternative embodiments, the two opposite end faces of the first locking member along its own length are respectively flush with the two end faces of the first housing along its length.

[0008] In this embodiment, the end face of the first locking member is flush with the end face of the first housing, making the outer peripheral structure of the housing regular and avoiding spatial interference caused by the protrusion of the first locking member, which facilitates the overall installation of the battery device; the flush structure reduces surface protrusions and gaps, further improving the sealing performance and the overall appearance is better.

[0009] In some alternative embodiments, the first locking member includes a first locking body and a first recess, the first recess extending along the length direction of the first locking member and disposed on the first locking body, a portion of the first locking body being located on both sides of the first recess along a first direction; a first positioning portion and a second positioning portion are accommodated in the first recess.

[0010] In this embodiment, the first locking member has a first recess to accommodate the first positioning part and the second positioning part, so that the two positioning parts are wrapped in the first recess, making the connection tighter. The first locking member covers a larger area of ​​the two positioning parts, improving the connection firmness. The first locking body is located on both sides of the first recess, which enhances the structural strength of the first locking member and avoids deformation under force. The first recess accommodating structure makes the two positioning parts fit more precisely, further improving the sealing performance.

[0011] In some alternative embodiments, the first recess extends through both ends of the first locking body along its length.

[0012] In this embodiment, the first recess extends through both ends of the first locking body, which facilitates processing and manufacturing and reduces the number of steps. The through structure allows both ends of the first locking member to cooperate with other locking members or components, expanding the connection methods. When the through groove accommodates the positioning part, there is no end limit, which can be adapted to positioning parts of different lengths, improving versatility. It can also be installed in the first positioning part and the second positioning part by sliding insertion, which is convenient for installation.

[0013] In some alternative embodiments, the first locking body includes a first protrusion, a first bottom wall portion, and two first side wall portions opposite each other along a first direction, the two first side wall portions being connected to the first bottom wall portion to define a first recess; the first protrusion is connected to one end of the first bottom wall portion along the length direction, and the first protrusion of one of two adjacent first locking members is inserted into the first recess of the other first locking member.

[0014] In this embodiment, the first locking body forms a U-shaped first recess with a first bottom wall and a first side wall, which has good structural stability and provides more comprehensive coverage when accommodating the first positioning part; the first protrusion allows adjacent first locking parts to be connected by insertion between the first protrusion and the first recess, realizing the continuous arrangement of the first locking parts on the outer periphery of the box, avoiding gaps at the connection, and improving the overall connection sealing and structural integrity; the insertion method facilitates assembly, reduces the use of bolts, and improves assembly efficiency.

[0015] In some alternative embodiments, the battery device further includes a plurality of second locking members, which cover the first positioning portion and the second positioning portion, and at least one end of the second locking member along its own length direction is inserted into the first recess.

[0016] In this embodiment, the insertion of the second locking member into the first locking member further increases the coverage area of ​​the first and second positioning parts, improving the connection strength and sealing performance; the second locking member is inserted into the first recess to achieve connection with the first locking member, so that the outer periphery of the first and second housings forms a continuous protective structure through the first and second locking members, avoiding weak connection caused by partial lack of locking member coverage; the insertion method does not require additional fasteners, reducing the use of bolts.

[0017] In some alternative embodiments, the two ends of the second locking member along its own length direction are respectively inserted into the first recesses of two adjacent first locking members.

[0018] In this embodiment, the two ends of the second locking member are respectively inserted into the first recess of the adjacent first locking member, so that the first locking member and the second locking member form an integral ring-shaped locking structure, which covers the two positioning parts of the entire outer periphery of the box, making the connection more stable and the sealing better; the overall structure has no breaks, the force is evenly distributed, and the structural strength of the battery device is improved.

[0019] In some alternative embodiments, the second locking member includes two second protrusions, a second bottom wall portion, and two second side wall portions. The two second side wall portions are disposed opposite each other along a first direction and are both connected to one side of the second bottom wall portion to define a second recess. The first positioning portion and the second positioning portion are accommodated in the second recess. The second protrusions are connected to both ends of the second bottom wall portion along the length direction of the second locking member, and the second protrusions are inserted into the first recess.

[0020] In this embodiment, the second locking member forms a second recess through the second bottom wall and the second side wall to accommodate the first positioning part and the second positioning part, which has a good covering effect and improves the sealing performance; the second protrusions at both ends are inserted into the first recess to achieve a precise connection with the first locking member, which has a high degree of structural fit and strong stability, and the continuity between the first locking member and the second locking member is better.

[0021] In some alternative embodiments, the first housing includes a third recess, which is recessed from the outer surface of the first housing to the interior of the first housing, and a first positioning portion protrudes from the bottom surface of the third recess; the second housing includes a fourth recess, which is recessed from the outer surface of the second housing to the interior of the second housing, and a second positioning portion protrudes from the bottom surface of the fourth recess; and a first locking member is respectively accommodated in the third recess and the fourth recess.

[0022] In this embodiment, the first housing has a third recess and the second housing has a fourth recess, in which the first locking member is accommodated, so that the first locking member does not protrude from the outer surface of the housing, making the structure more compact and avoiding space occupation and interference caused by protrusion; the third and fourth recesses make the contact area between the first locking member and the housing larger and the connection more secure.

[0023] In some alternative embodiments, the second housing has a third positioning part at the other end along the first direction.

[0024] In this embodiment, the second housing is provided with a third positioning part, so that its other end can be stacked with other housings to expand the number of housings stacked and realize multi-layer stacking to increase the capacity of the battery device; the third positioning part ensures the positioning accuracy when stacking multiple layers.

[0025] In some alternative embodiments, the plurality of housings include a plurality of second housings, which are stacked along a first direction, and the second positioning portions and third positioning portions of two adjacent second housings are arranged along the first direction; a portion of the plurality of first locking members covers the third positioning portion and the second positioning portion.

[0026] In this embodiment, multiple second housings are stacked together through the cooperation of the second positioning part and the third positioning part to achieve a stable connection of the multi-layer housings; the first locking part covers the second positioning part and the third positioning part to ensure the firmness and sealing of the multi-layer connection; the unified locking method facilitates assembly and maintenance and improves the modularity of the battery device.

[0027] In some alternative embodiments, the first housing and / or the second housing are provided with a sealing groove, which is recessed from the end face of the first housing and / or the second housing along a first direction.

[0028] In this embodiment, the first housing and / or the second housing are provided with a sealing groove to accommodate the sealing element and enhance the sealing performance between the first housing and the second housing; the recessed structure of the sealing groove plays a positioning role for the sealing element, preventing it from shifting during assembly or use, and ensuring a stable sealing effect.

[0029] In some alternative embodiments, both the first housing and the second housing have a first receiving cavity, which receives a single battery cell and is connected to a sealing groove.

[0030] In this embodiment, the first receiving cavity is connected to the sealing groove. Gas in the receiving cavity can enter the sealing groove through the channel. The gas pressure makes the sealing element fit more tightly against the mating surface, further improving the sealing performance. In addition, the large operating space facilitates the installation of the sealing element.

[0031] In some alternative embodiments, the battery device further includes a seal that is received in a sealing groove and bonded to the first housing and the second housing.

[0032] In this embodiment, the seal is housed in the sealing groove and bonded to the two housings, enhancing the sealing performance between the first and second housings, preventing external moisture and dust from entering the first housing cavity, and protecting the battery cells; the bonding method ensures that the seal is firmly connected to the housing, preventing it from falling off and failing.

[0033] In some alternative embodiments, the first housing further includes a first main body portion, a first positioning portion disposed at a first end of the first main body portion along a first direction and located on the outer periphery of the first main body portion, the first positioning portion having a fifth recess portion recessed from the end face of the first end; the second housing further includes a second main body portion, a second positioning portion disposed at a second end of the second main body portion along a first direction and located on the outer periphery of the second main body portion, a portion of the second positioning portion protruding from the end face of the second end, the second positioning portion being received in the fifth recess portion; the battery device further includes a sealing member, the sealing member being received in the fifth recess portion and located between the second positioning portion and the first main body portion.

[0034] In this embodiment, the first positioning part has a fifth recess, into which the second positioning part is accommodated, achieving precise positioning of the first and second housings and a tighter fit. A sealing element is located within the fifth recess, enhancing the sealing at the mating point of the two positioning parts and preventing moisture from entering the housing through the mating gap. The insertion fit of the two positioning parts also improves connection stability. In some optional embodiments, the battery device further includes a cover plate for covering the side of the second housing opposite to the first housing. The cover plate includes a body plate and a hook portion, the hook portion being located on the outer periphery of the body plate and protruding towards the second housing. The second housing also includes a second main body and a mating portion, the mating portion being located at the third end of the second main body along the first direction and on the outer periphery of the second main body, with a portion of the hook portion located on the side of the mating portion closer to the first housing.

[0035] In this embodiment, the hook of the cover plate engages with the mating part of the second housing to connect the cover plate and the second housing, which can reduce the use of bolts; the hook engagement structure is firm and easy to assemble; after the cover plate is closed, it can protect the end structure of the second housing and prevent external impurities from entering, and the engagement between the hook and the mating part also enhances the end sealing.

[0036] In some alternative embodiments, the first locking member is welded to both the first housing and the second housing.

[0037] In this embodiment, the first locking member is welded to both the first and second housings, resulting in high connection strength and resistance to loosening. The weld seam forms a sealing structure, further enhancing the sealing performance between the housings. Compared to bolted connections, welding reduces the number of connecting parts, resulting in a simpler structure and avoiding the sealing hazards associated with bolt holes.

[0038] Secondly, some embodiments of this application also provide an electrical device, including the battery device described above. Attached Figure Description

[0039] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0040] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0041] Figure 2 A schematic diagram of a structure of a battery device provided in some embodiments of this application;

[0042] Figure 3 for Figure 2 Partial sectional views of multiple boxes within the structure;

[0043] Figure 4 for Figure 3 A schematic diagram of a structure of the first locking component in the middle;

[0044] Figure 5 for Figure 3 Another structural schematic diagram of the first locking component;

[0045] Figure 6 for Figure 3 Schematic diagram of the structure of the second locking component;

[0046] Figure 7 for Figure 3 A structural cross-sectional view of the second box in the middle;

[0047] Figure 8 A cross-sectional view of another structure of the battery device provided in some embodiments of this application;

[0048] Figure 9 for Figure 8 A magnified view of a portion of point A in the middle.

[0049] The accompanying drawings are not necessarily drawn to scale.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor; 5. Housing; 6. Individual battery cell;

[0052] 51. First housing; 511. First positioning part; 511a. Fifth recess; 513. Third recess; 521. Second positioning part; 51a. First main body; 52. Second housing; 522. Fourth recess; 523. Third positioning part; 52a. Second main body; 52b. Fitting part; 53. Sealing groove; 54. Sealing element; 55. Cover plate; 551. Body plate; 552. Hook; 530. First receiving cavity;

[0053] 7. First locking member; 71. First locking body; 711. First bottom wall portion; 712. First side wall portion; 713. First protrusion; 72. First recess; 8. Second locking member; 81. Second bottom wall portion; 82. Second side wall portion; 83. Second recess; 84. Second protrusion; X1. First length direction; X2. Second length direction; Z. First direction. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0056] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0059] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0060] In this application, "multiple" means two or more (including two).

[0061] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0062] A battery pack consists of a housing and multiple battery cells housed within it. Each battery cell is the smallest unit that makes up the battery pack. When a battery pack requires multiple housings connected to form a larger storage space for battery cells, the housings are typically bolted together. However, this method requires more bolts, increasing weight and cost. Furthermore, bolted connections result in poor sealing, reducing the reliability of the battery pack.

[0063] In view of this, this application provides a battery device in which a first housing and a second housing cooperate along a first direction through a first positioning part and a second positioning part to achieve positioning guidance during stacking and reduce assembly deviation; a first locking member covers the first positioning part and the second positioning part and connects to the first housing and the second housing, which reduces the number of bolts used compared to the traditional bolt direct connection of the housing, and the covering connection increases the connection area and improves connection stability; the first positioning part and the second positioning part cooperate with the first locking member to form a multi-seal structure, reducing the channels for external moisture and dust to enter the housing, improving sealing performance, protecting the internal battery cells, and improving the reliability of the battery device.

[0064] The battery cells described in this application are applicable to battery devices and electrical equipment using battery devices. Electrical equipment can be devices that use battery devices as a power source or various energy storage systems that use battery devices as energy storage elements. Electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0065] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0066] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0067] like Figure 1 As shown, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0068] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0069] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0070] Figure 2 This is a schematic diagram of a structure of a battery device provided in some embodiments of this application.

[0071] In some embodiments, the battery device 2 may include one or more battery cell assemblies for providing voltage and capacity.

[0072] A battery cell assembly may include multiple battery cells 6, which are connected in series, parallel, or mixed connection via a busbar. Mixed connection means that multiple battery cells 6 are connected in both series and parallel.

[0073] Battery cell 6 can be a secondary battery cell. A secondary battery cell refers to a battery cell that can be recharged after being discharged, allowing the active materials to be activated and continue to be used.

[0074] As an example, the battery cell 6 can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc.

[0075] As an example, the battery cell 6 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include square battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0076] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 6; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 6 into a single module. As an example, a battery module can be formed by bundling multiple battery cells 6 together with cable ties.

[0077] In some embodiments, the battery device 2 may be a battery pack, which includes a housing 5 and one or more battery cell assemblies housed within the housing 5. As an example, the battery cell assembly may be a battery module, which can be housed within the housing by securing the battery module to the housing. Alternatively, the battery cell assembly may be housed within the housing by directly securing multiple battery cells 6 to the housing.

[0078] In some embodiments, the housing 5 is used to house the battery cell 6, and the housing 5 can have various structures.

[0079] In some embodiments, the housing 5 may be part of the vehicle's chassis structure. For example, a portion of the housing 5 may be at least a portion of the vehicle's floor, or a portion of the housing 5 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0080] In some embodiments, the battery device 2 may be an energy storage device.

[0081] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0082] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0083] Figure 3 for Figure 2 Partial sectional views of multiple boxes.

[0084] like Figure 2 and Figure 3As shown, some embodiments of this application provide a battery device 2, including a plurality of battery cells 6, a plurality of housings 5, and a first locking member 7. The plurality of battery cells 6 are housed within the plurality of housings 5. The plurality of housings 5 ​​include a first housing 51 and a second housing 52. The first housing 51 and the second housing 52 are stacked along a first direction Z. The first housing 51 has a first positioning portion 511 at one end along the first direction Z near the second housing 52. The first positioning portion 511 is arranged along the outer periphery of the first housing 51. The second housing 52 has a second positioning portion 521 at one end along the first direction Z near the first housing 51. The second positioning portion 521 is arranged along the outer periphery of the second housing 52, and the first positioning portion 511 and the second positioning portion 521 are connected in a cooperating manner along the first direction Z. At least a portion of the first locking member 7 covers the first positioning portion 511 and the second positioning portion 521, and is connected to both the first housing 51 and the second housing 52.

[0085] For example, the first direction Z is the stacking direction of the 5-layer housing, which can be the height direction of the battery device.

[0086] In some examples, when there are three or more housings 5, the battery device 2 may also include a third housing 5, a fourth housing 5, etc., and all housings 5 ​​are stacked sequentially along the first direction Z to form an integrated structure.

[0087] In one example, the first housing 51 may include a base plate and a first side beam, the base plate being connected to a first opening of the second side beam, and the second housing 52 may include a second side beam and a top cover, the top cover being connected to a second opening on one side of the first side beam. When the first housing 51 and the second housing 52 are stacked, the first side beam is connected to the second side beam, and the top cover is disposed opposite to the base plate.

[0088] As an example, the first positioning part 511 is disposed on the first side beam, and the second positioning part 521 is disposed on the second side beam.

[0089] In another example, the first housing 51 may include a first side beam and a bottom plate, the bottom plate being connected to a first opening in the first side beam, and the second housing 52 may include a second side beam. When the first housing 51 and the second housing 52 are stacked, the second side beam is connected to the first side beam.

[0090] In another example, the first housing 51 may include a first side beam, and the second housing 52 may include a second side beam. When the first housing 51 and the second housing 52 are stacked, the second side beam is connected to the first side beam.

[0091] In some examples, the first positioning part 511 may be an integral ring structure, or the first housing 51 may have a plurality of positioning parts spaced apart and surrounding the outer periphery of the first housing 51; similarly, the second positioning part 521 may be one or more.

[0092] In some examples, the first positioning part 511 may be convex, concave, or stepped. Similarly, the second positioning part 521 may be convex, concave, or stepped, matching the first positioning part 511. As an example, the first positioning part 511 and the second positioning part 521 are engaged in a concave-convex interlocking limiting fit.

[0093] For example, the number of first locking elements 7 can be one or more. When the number is multiple, the multiple first locking elements 7 are arranged in segments along the outer periphery of the housing 5.

[0094] In one example, the cuboid box 5 has one locking element 7 on each of its four sides, and the length of the first locking element 7 on each side is adapted to the length of the side; in another example, the long side has two first locking elements 7 and the short side has one first locking element 7.

[0095] For example, the first locking member 7 may be elongated, block-shaped, ring-shaped, etc. As an example, the cross-sectional shape of the first locking member 7 may be U-shaped.

[0096] The first locking member 7 covering the first positioning part 511 and the second positioning part 521 means that the first locking member 7 fixes, constrains, and isolates the first positioning part 511 and the second positioning part 521, thereby enabling the first positioning part 511 and the second positioning part 521 to move in multiple directions and reducing the intrusion of impurities from the external environment. For example, the first locking member 7 can be in an interference fit or a clearance fit with the first positioning part 511 and the second positioning part 521.

[0097] In some examples, the first locking member 7 can be welded, bonded, or snapped together with the first housing 51 and the second housing 52. For example, the welding is specifically laser welding, where the edge of the first locking member 7 is laser-fused with the surfaces of the first housing 51 and the second housing 52 to form a continuous weld.

[0098] In this embodiment, the first housing 51 and the second housing 52 are engaged along the first direction Z by the first positioning part 511 and the second positioning part 521 to achieve positioning guidance during stacking and reduce assembly deviation; the first locking member 7 covers the first positioning part 511 and the second positioning part 521 and is connected to the first housing 51 and the second housing 52. Compared with the traditional bolt direct connection of the housing 5, the number of bolts used is reduced, and the covering connection increases the connection area and improves the connection stability; the first positioning part 511 and the second positioning part 521 cooperate with the first locking member 7 to form a multi-seal structure, reducing the channels for external moisture and dust to enter the interior of the housing 5, improving the sealing performance, protecting the internal battery cells 6, and improving the reliability of the battery device 2.

[0099] In some embodiments of this application, the two opposite end faces of the first locking member 7 along its own length direction are respectively flush with the two end faces of the first housing 51 along its length direction.

[0100] For example, the length direction of the first locking member 7 can be the direction of the long side extension of the box 5 or the direction of the short side extension of the box 5. For ease of explanation, this application defines the length direction of the first locking member 7 as the first length direction X1.

[0101] In some examples, the end face shape of the first locking member 7 can be a plane, an inclined plane, an arc-shaped surface, etc. In other examples, the end face shape of the first housing 51 can be a flat plane, or an end face with chamfers or rounded corners. As an example, the end face of the first locking member 7 is a plane, the end face of the first housing 51 is a plane, and the two planes are flush.

[0102] In another example, the end face of the second housing 52 is flat, and the end face of the second housing 52 is flush with the end face of the first locking member 7.

[0103] As an example, the end face of the first locking member 7 is flush with the end face of the first housing 51 in such a way that the length dimension of the first locking member 7 is the same as the side dimension of the first housing 51 in the length direction, so that the two end faces are naturally flush.

[0104] As an example, one side of the first box 51 of the cuboid has a first locking element 7.

[0105] In this embodiment, the end face of the first locking member 7 is flush with the end face of the first housing 51, making the outer periphery structure of the housing 5 regular, avoiding the first locking member 7 from protruding and causing spatial interference, and facilitating the overall installation of the battery device 2; the flush structure reduces surface protrusions and gaps, further improving the sealing performance, and the overall appearance is better.

[0106] Figure 4 for Figure 3 A schematic diagram of one structure of the first locking element 7.

[0107] like Figure 3 and Figure 4 As shown, in some embodiments of this application, the first locking member 7 includes a first locking body 71 and a first recess 72. The first recess 72 extends along the length direction of the first locking member 7 and is disposed on the first locking body 71. A portion of the first locking body 71 is located on both sides of the first recess 72 along the first direction Z. The first positioning portion 511 and the second positioning portion 521 are accommodated in the first recess 72.

[0108] In some examples, the first locking body 71 can be integral or separate. In one example, the separate first locking body 71 can be formed by splicing two side bodies and a bottom body to form the first recess 72. In another example, the integral first locking body 71 forms the first recess 72 by stripping, stamping, or injection molding.

[0109] In some examples, another portion of the first locking body 71 may be located on both sides of the first recess 72 along the first length direction X1. That is, the first recess 72 may be disposed through or not through the first locking body 71 along the first length direction X1.

[0110] In some examples, the first recess 72 may extend through one end or both ends of the first locking body 71 along the length direction.

[0111] For example, the first locking body 71 may be U-shaped. In some examples, the first locking body 71 may be made of metal materials such as aluminum alloy or stainless steel.

[0112] The number of first recesses 72 may be one or more. For example, multiple first recesses 72 are arranged side by side along the first direction Z to accommodate the first positioning part 511 and the second positioning part 521 respectively.

[0113] In some examples, the first recess 72 may be formed by slotting in the central region of the first locking body 71, or by recessing inward at one edge of the first locking body 71. In some examples, the two side walls of the first locking body 71 are symmetrically distributed on both sides of the first recess 72, or asymmetrically distributed.

[0114] In some examples, the first positioning part 511 and the second positioning part 521 may be embedded side by side into the first recess 72, or stacked in the first recess 72 along the first direction Z, or partially overlapped and accommodated in the recess.

[0115] In this embodiment, the first locking member 7 has a first recess 72 to accommodate the first positioning part 511 and the second positioning part 521, so that the two positioning parts are wrapped in the first recess 72, making the connection tighter. The first locking member 7 has a larger coverage area for the two positioning parts, which improves the connection firmness. The first locking body 71 is located on both sides of the first recess 72, which enhances the structural strength of the first locking member 7 and avoids deformation under force. The accommodating structure of the first recess 72 makes the two positioning parts fit more precisely, further improving the sealing performance.

[0116] In one embodiment of this application, the first recess 72 extends through both ends of the first locking body 71 along its length.

[0117] For example, the length direction in this embodiment is the first length direction X1.

[0118] In some examples, the first recess 72 can be formed by milling from one end of the body to the other to form a through groove, or by reserving a through cavity when the mold is integrally formed, or by splicing together a first locking body 71 having multiple parts.

[0119] In this embodiment, the first recess 72 penetrates both ends of the first locking body 71, which facilitates processing and manufacturing and reduces the number of steps; the through structure allows the two ends of the first locking member 7 to cooperate with other locking members or components, expanding the connection methods; when the through groove accommodates the positioning part, there is no end limit, which can be adapted to positioning parts of different lengths, improving versatility, and it can be slidably installed on the first positioning part 511 and the second positioning part 521, which is convenient for installation.

[0120] Figure 5 for Figure 3 Another structural schematic diagram of the first locking element 7.

[0121] like Figure 5 As shown, in some embodiments of this application, the first locking body 71 includes a first protrusion 713, a first bottom wall portion 711, and two first side wall portions 712 opposite each other along the first direction Z. The two first side wall portions 712 are connected to the first bottom wall portion 711 to define the first recess 72. The first protrusion 713 is connected to one end of the first bottom wall portion 711 along the length direction. The first protrusion 713 of one of two adjacent first locking members 7 is inserted into the first recess 72 of the other first locking member 7.

[0122] The number of first protrusions 713 can be one or more. In one example, when there are multiple first protrusions 713, they are arranged at intervals or side by side along one end of the first bottom wall portion 711. In some examples, the shape of the first protrusions 713 can be a rectangular protrusion, a trapezoidal protrusion, a dovetail protrusion, etc. As an example, the dovetail protrusion has a beveled side, which makes it difficult to fall out after insertion and ensures a stable connection.

[0123] For example, the length direction in this embodiment is the first length direction X1.

[0124] In some examples, the first protrusion 713 may be integrally formed with the first bottom wall portion 711, or may be connected to the end of the first bottom wall portion 711 by welding or bonding.

[0125] In some examples, the first sidewall portion 712 and the first bottom wall portion 711 can be flat, curved, corrugated, or other shapes. The shapes of the first sidewall portion 712 and the first bottom wall portion 711 can be the same or different.

[0126] In some examples, the connection between the first sidewall portion 712 and the first bottom wall portion 711 can be integral molding, welding, or bolt connection. As an example, integral molding provides good sealing performance.

[0127] In some examples, the two first sidewall portions 712 are vertically connected to the two sides of the first bottom wall portion 711 to form a U-shaped recess, or are obliquely connected to form a trapezoidal recess.

[0128] In some examples, the first protrusion 713 is connected to one end of the first bottom wall portion 711 with the bottom surface of the protrusion flush with the end face of the bottom wall portion, or a portion of the first protrusion 713 is embedded into the end of the first bottom wall portion 711 to form a mortise and tenon connection.

[0129] In some examples, the first protrusion 713 of the adjacent first locking member 7 is inserted into the first recess 72 of the other locking member, with the first protrusion 713 fully inserted into the recess and its end face abutting against the inner wall of the first recess 72, or partially inserted with its side side fitting against the inner wall of the recess, and the insertion part can be fixed by welding, bonding or snapping.

[0130] In this embodiment, the first locking body 71 forms a U-shaped first recess 72 by the first bottom wall portion 711 and the first side wall portion 712, which has good structural stability and more comprehensive coverage when accommodating the first positioning portion 511; the first protrusion 713 allows adjacent first locking members 7 to be connected by plugging the first protrusion 713 into the first recess 72, so as to realize the continuous arrangement of the first locking members 7 on the outer periphery of the box 5, avoid gaps at the connection, and improve the overall connection sealing and structural integrity; the plugging method facilitates assembly, reduces the use of bolts, and improves assembly efficiency.

[0131] Continue to refer to Figure 2 and Figure 3 In some embodiments of this application, the battery device 2 further includes a plurality of second locking members 8, the second locking members 8 covering the first positioning part 511 and the second positioning part 521, and at least one end of the second locking member 8 along its own length direction is inserted into the first recess 72.

[0132] For example, the length direction of the second locking member 8 is the second length direction X2, which can be either the long side direction or the short side direction of the housing 5. As an example, the first locking member 7 is disposed on the long side of the housing 5, and the second locking member 8 is disposed on the short side of the housing 5. The first length direction X1 is the length direction of the housing 5, and the second length direction X2 is the short side direction of the housing 5.

[0133] The number of second locking elements 8 can be one or more. In one example, the first locking element 7 is provided on three sides of the cuboid box 5 in the circumferential direction, and the second locking element 8 is provided on the other side. In another example, the first locking element 7 is provided on two opposite sides of the cuboid box 5 in the circumferential direction, and the second locking element 8 is provided on the other two sides.

[0134] The structure of the second locking member 8 may be the same as or different from that of the first locking member 7. In one example, the first locking member 7 includes two first sidewall portions 712 and a first bottom wall portion 711. The two first sidewall portions 712 are connected to the first bottom wall portion 711 to form a first recess 72. The two ends of the first sidewall portions 712 and the first bottom wall portion 711 are flush. At least one end of the second locking member 8 in the second length direction X2 is inserted into the first recess 72. As an example, the surface of the first bottom wall portion 711 facing away from the first recess 72 is flush with the outer surfaces of the first housing 51 and the second housing 52.

[0135] In some examples, the first locking member 7 has a first protrusion 713, and the two ends of the second locking member 8 along the second length direction X2 are respectively inserted into the first recesses 72 of the two adjacent first locking members 7 away from the first protrusion 713.

[0136] In some examples, the first locking member 7 does not have the first protrusion 713, and one end of the second locking member 8 along the second length direction X2 is inserted into the first recess 72, while the other end is flush with the surfaces of the first housing 51 and the second housing 52. Alternatively, one end of the second locking member 8 along the second length direction X2 is inserted into one recess of the first locking member 7, and the other end is inserted into another recess of the first locking member 7. As an example, the insertion fit can be a clearance fit for easy insertion, or an interference fit for improved connection tightness.

[0137] In this embodiment, the insertion of the second locking member 8 into the first locking member 7 further increases the coverage area of ​​the first positioning part 511 and the second positioning part 521, improving the connection firmness and sealing performance; the second locking member 8 is inserted into the first recess 72 to achieve connection with the first locking member 7, so that the outer periphery of the first housing 51 and the second housing 52 forms a continuous protective structure through the first locking member 7 and the second locking member 8, avoiding weak connection caused by partial lack of locking member coverage; the insertion method does not require additional fasteners, reducing the use of bolts.

[0138] In one embodiment of this application, the two ends of the second locking member 8 along its own length direction are respectively inserted into the first recesses 72 of two adjacent first locking members 7.

[0139] The insertion depths at both ends of the second locking member 8 can be the same or different. In one example, one end of the second locking member 8 is inserted deeper to enhance stability, while the other end is inserted shallower to facilitate adjustment.

[0140] In one embodiment, a first locking member 7 is provided along the long side of the cuboid box 5, and a second locking member 8 is provided along the short side. The first locking member 7 and the second locking member 8 are arranged in pairs facing each other.

[0141] In this embodiment, the two ends of the second locking member 8 are respectively inserted into the first recess 72 of the adjacent first locking member 7, so that the first locking member 7 and the second locking member 8 form an integral ring-shaped locking structure, covering the two positioning parts of the entire outer periphery of the housing 5, making the connection more stable and the sealing better; the overall structure has no breaks, the force is evenly distributed, and the structural strength of the battery device 2 is improved.

[0142] Figure 6 for Figure 3 A schematic diagram of the structure of the second locking component 8.

[0143] like Figure 3 and Figure 6 As shown, in an optional embodiment of this application, the second locking member 8 includes two second protrusions 84, a second bottom wall portion 81, and two second side wall portions 82. The two second side wall portions 82 are disposed opposite each other along the first direction Z and are both connected to one side of the second bottom wall portion 81 to define the second recess 83. The first positioning portion 511 and the second positioning portion 521 are accommodated in the second recess 83. The second protrusions 84 are connected to both ends of the second bottom wall portion 81 along the length direction of the second locking member 8, and the second protrusions 84 are inserted into the first recess 72.

[0144] In some examples, the second protrusion 84 may be integrally formed with the second bottom wall portion 81, or may be connected to the end of the second bottom wall portion 81 by welding or bonding.

[0145] In some examples, the connection between the second side wall portion 82 and the second bottom wall portion 81 can be integral molding, welding, or bolt connection. As an example, integral molding provides good sealing performance.

[0146] For example, the shape of the second protrusion 84 can be adapted to the first recess 72. In one example, the first recess 72 is a rectangular groove and the second protrusion 84 is a rectangular bump; in another example, the first recess 72 is a trapezoidal groove and the second protrusion is a trapezoidal bump.

[0147] In some examples, the size of the second protrusion 84 may be slightly smaller than the first recess 72 to form a clearance fit, or slightly larger than the first recess 72 to form an interference fit.

[0148] In some examples, the two second sidewall portions 82 are perpendicularly connected to the second bottom wall portion 81 to form a U-shaped second recess 83, or are obliquely connected to form a trapezoidal second recess 83.

[0149] In some examples, the bottom surface of the second protrusion 84 is flush with the end face of the second bottom wall portion 81, or the second protrusion 84 is embedded in the end of the second bottom wall portion 81.

[0150] In some examples, the second protrusion 84 is inserted into the first recess 72 such that the protrusion is fully inserted into the first recess 72 and the end of the second protrusion 84 abuts against the inner wall of the first recess 72, or a portion of the second protrusion 84 is inserted into the first recess 72 and the side of the second protrusion 84 fits against the inner wall of the first recess 72. As an example, it can be fixed by welding.

[0151] In this embodiment, the second locking member 8 forms a second recess 83 through the second bottom wall portion 81 and the second side wall portion 82 to accommodate the first positioning portion 511 and the second positioning portion 521, which has a good covering effect and improves the sealing performance; the second protrusions 84 at both ends are inserted into the first recess 72 to achieve a precise connection with the first locking member 7, which has a high degree of structural fit and strong stability, and the continuity of the first locking member 7 and the second locking member 8 is better.

[0152] Continue to refer to Figure 2 and Figure 3 In some optional embodiments of this application, the first housing 51 includes a third recess 513, which is recessed from the outer surface of the first housing 51 to the interior of the first housing 51, and the first positioning part 511 protrudes from the bottom surface of the third recess 513; the second housing 52 includes a fourth recess 522, which is recessed from the outer surface of the second housing 52 to the interior of the second housing 52, and the second positioning part 521 protrudes from the bottom surface of the fourth recess 522; the first locking member 7 is respectively accommodated in the third recess 513 and the fourth recess 522.

[0153] In some examples, the third recess 513 may be an integral annular groove or multiple segmented grooves. As an example, each segment of the segmented third recess 513 corresponds to a position of a first locking member 7. Exemplarily, the shape of the third recess 513 may be a rectangular groove, an arc groove, a stepped groove, etc.

[0154] The depth of the third recess 513 can be adjusted according to the height of the first side wall portion 712 of the first locking member 7, so that the surface of the locking member after being received is flush with or slightly recessed from the outer surface of the housing 5. For example, the structure of the fourth recess 522 is adapted to the third recess 513, and the number and shape may be the same or different.

[0155] In some examples, the third recess 513 is recessed from the outer surface of the first housing 51 into the interior by pre-reserving a recessed structure during die casting or by machining the outer surface; the fourth recess 522 is similarly provided.

[0156] In some examples, the first positioning part 511 protrudes from the bottom surface of the third recess 513 and is integrally formed on the bottom surface, or is fixed by welding.

[0157] For example, a portion of the first locking member 7 is located in the third recess 513, and another portion is located in the fourth recess 522; as an example, one first sidewall portion 712 of the first locking member 7 is received in the third recess 513, and the other first sidewall portion 712 is received in the fourth recess 522. Similarly, a portion of the second locking member 8 is received in the third recess 513, and another portion is received in the fourth recess 522.

[0158] In this embodiment, the first housing 51 is provided with a third recess 513, and the second housing 52 is provided with a fourth recess 522, in which the first locking member 7 is accommodated, so that the first locking member 7 does not protrude from the outer surface of the housing 5, making the structure more compact and avoiding space occupation and interference caused by protrusion; the third recess 513 and the fourth recess 522 make the contact area between the first locking member 7 and the housing 5 larger and the connection more secure.

[0159] Figure 7 for Figure 3 A structural cross-sectional view of the second box 52.

[0160] like Figure 3 and Figure 7 As shown, in one embodiment of this application, the second housing 52 has a third positioning part 523 at the other end along the first direction Z.

[0161] For example, the third positioning part 523 may be an integral ring or segmented, and its structure may be the same as that of the first positioning part 511 or the second positioning part 521.

[0162] In some examples, the third positioning part 523 may be integrally formed on the end face of the second housing 52, or connected by fasteners, adhesive welding, or other means. In some examples, the third positioning part 523 may be arranged continuously or intermittently along the outer periphery of the second housing 52, consistent with the arrangement of the first positioning part 511 or the second positioning part 521.

[0163] In this embodiment, the second housing 52 is provided with a third positioning part 523, so that its other end can be stacked with other housings 5 ​​to expand the number of housings 5 ​​stacked and realize multi-layer stacking to increase the capacity of the battery device 2; the third positioning part 523 ensures the positioning accuracy when stacking multiple layers.

[0164] Continue to refer to Figure 3 and Figure 7 Furthermore, in some optional embodiments of this application, the plurality of boxes 5 include a plurality of second boxes 52, the plurality of second boxes 52 are stacked along the first direction Z, and the second positioning part 521 and the third positioning part 523 of two adjacent second boxes 52 are arranged along the first direction Z; a portion of the plurality of first locking members 7 covers the third positioning part 523 and the second positioning part 521 of two adjacent second boxes 52.

[0165] In some examples, the second positioning part 521 and the third positioning part 523 of the adjacent second housing 52 are arranged along the first direction Z such that the second positioning part 521 is located above or below the third positioning part 523, or the third positioning part 523 is located inside or outside the second positioning part 521, so as to achieve the fit or plug-in cooperation between the two.

[0166] For example, the first locking member 7 covers the third positioning part 523 and the second positioning part 521 in the same way as it covers the first positioning part 511 and the second positioning part 521, by accommodating the recess or covering the outside.

[0167] In one example, a portion of the plurality of first locking members 7 covers the third positioning portion 523 and the second positioning portion 521 of two adjacent second housings 52, and another portion covers the first positioning portion 511 and the second positioning portion 521 of the adjacent second housings 52 and the first housing 51.

[0168] In one example, the two first sidewall portions 712 of the first locking member 7 are respectively accommodated in the fourth recesses 522 of two adjacent second housings 52. As an example, the second housing 52 has one fourth recess 522 near the second positioning portion 521 and another fourth recess 522 near the third positioning portion 523.

[0169] In this embodiment, multiple second housings 52 are stacked together by the cooperation of the second positioning part 521 and the third positioning part 523 to achieve a stable connection of the multi-layer housings 5; the first locking part 7 covers the second positioning part 521 and the third positioning part 523 to ensure the firmness and sealing of the multi-layer connection; the unified locking method facilitates assembly and maintenance and improves the modularity of the battery device 2.

[0170] In one embodiment of this application, the first housing 51 and / or the second housing 52 are provided with a sealing groove 53, which is recessed from the end face of the first housing 51 and / or the second housing 52 along the first direction Z.

[0171] Let's take the first box 51 as an example.

[0172] The number of sealing grooves 53 may be one or more. For example, an annular sealing groove 53; in one example, multiple sealing grooves 53 are arranged circumferentially at intervals along the end face of the first housing 51. The sealing grooves 53 may be separated from or communicate with the first receiving cavity 530 of the first housing 51.

[0173] For example, the shape of the sealing groove 53 may be a rectangular groove, a semi-circular groove, a dovetail groove, etc.

[0174] In this embodiment, the first housing 51 and / or the second housing 52 are provided with a sealing groove 53, which can accommodate the sealing element 54 to enhance the sealing performance between the first housing 51 and the second housing 52; the recessed structure of the sealing groove 53 plays a positioning role for the sealing element 54, preventing it from shifting during assembly or use, and ensuring a stable sealing effect.

[0175] Specifically, in some optional embodiments of this application, both the first housing 51 and the second housing 52 have a first receiving cavity 530, which receives the battery cell 6 and is connected to the sealing groove 53.

[0176] In some examples, the first receiving cavity 530 may be divided into multiple sub-receiving cavities, each of which contains one or a group of battery cells 6.

[0177] In one example, the sealing groove 53 extends along the wall thickness direction of the first housing 51 and communicates with the first receiving cavity 530.

[0178] In this embodiment, the first receiving cavity 530 is connected to the sealing groove 53. Gas in the receiving cavity can enter the sealing groove 53 through the channel. The gas pressure makes the sealing element 54 fit more tightly against the mating surface, further improving the sealing performance. In addition, the large operating space facilitates the installation of the sealing element 54.

[0179] In addition, in one specific embodiment of this application, the battery device 2 further includes a seal 54, which is accommodated in a sealing groove 53 and is bonded to the first housing 51 and the second housing 52.

[0180] In some examples, the seal 54 may be made of rubber such as nitrile rubber or silicone, foam materials such as polyurethane foam, metal gaskets, sealants, etc. Exemplarily, the cross-sectional shape of the seal 54 may be circular, rectangular, trapezoidal, etc.

[0181] In some examples, the seal 54 is accommodated in the sealing groove 53 by an interference fit or is bonded and fixed in the groove. In some examples, the seal 54 is bonded to the first housing 51 and the second housing 52 by using sealant to bond the seal 54 to the inner wall of the sealing groove 53 of the first housing 51 and the end face of the second housing 52 respectively, or the seal 54 has its own adhesive layer for bonding.

[0182] In this embodiment, the sealing element 54 is accommodated in the sealing groove 53 and bonded to the two housings 5, which enhances the sealing performance between the first housing 51 and the second housing 52, prevents external moisture and dust from entering the first accommodating cavity 530, and protects the battery cell 6; the bonding method makes the sealing element 54 firmly connected to the housing 5, avoiding detachment and failure.

[0183] Figure 8 A cross-sectional view of another structure of the battery device 2 provided in some embodiments of this application; Figure 9 for Figure 8 A magnified view of a portion of point A in the middle.

[0184] like Figure 8 and Figure 9 As shown, in one embodiment of this application, the first housing 51 further includes a first main body portion 51a, a first positioning portion 511 disposed at the first end of the first main body portion 51a along the first direction Z and located on the outer periphery of the first main body portion 51a, the first positioning portion 511 having a fifth recess 511a, the fifth recess 511a being recessed from the end face of the first end; the second housing 52 further includes a second main body portion 52a, a second positioning portion 521 disposed at the second end of the second main body portion 52a along the first direction Z and located on the outer periphery of the second main body portion 52a, a portion of the second positioning portion 521 protruding from the end face of the second end, the second positioning portion 521 being accommodated in the fifth recess 511a; the battery device 2 further includes a sealing member 54, the sealing member 54 being accommodated in the fifth recess 511a and located between the second positioning portion 521 and the first main body portion 51a.

[0185] In some examples, the first main body 51a may be in the shape of a cuboid, a cube, etc. The second main body 52a has a similar structure to the first main body 51a, but its shape and material may be the same or different.

[0186] In some examples, there may be one or more fifth recesses 511a, and when there are multiple fifth recesses 511a, they are arranged at intervals along the outer periphery of the first positioning portion 511; for example, the shape of the fifth recess 511a is adapted to the shape of the second positioning portion 521 so as to be able to accommodate the second positioning portion 521.

[0187] In some examples, the first positioning part 511 is integrally formed on the outer periphery of the first end of the first main body part 51a, or is fixed by welding.

[0188] In some examples, the fifth recess 511a is recessed from the first end face of the first positioning portion 511 by machining or integral molding. Similarly, the second positioning portion 521 is provided on the outer periphery of the second end of the second main body portion 52a.

[0189] For example, the second positioning part 521 is accommodated in the fifth recess 511a for partial or complete insertion.

[0190] In some examples, the seal 54 is disposed between the bottom surface of the fifth recess 511a and the bottom of the second positioning portion 521, or between the side of the second positioning portion 521 and the inner wall of the fifth recess 511a.

[0191] In this embodiment, the first positioning part 511 is provided with a fifth recess, and the second positioning part 521 is accommodated therein, so as to achieve precise positioning of the first box 51 and the second box 52 and a tighter fit; the sealing member 54 is provided in the fifth recess 511a, which enhances the sealing performance of the two positioning parts and prevents moisture from entering the box from the gap between the parts; the insertion fit of the two positioning parts also improves the connection stability.

[0192] Continue to refer to Figure 8 In some optional embodiments of this application, the battery device 2 further includes a cover plate 55, which is used to cover the side of the second housing 52 away from the first housing 51. The cover plate 55 includes a body plate 551 and a hook portion 552. The hook portion 552 is disposed on the outer periphery of the body plate 551 and protrudes toward the second housing 52. The second housing 52 further includes a second main body portion 52a and a mating portion 52b. The mating portion 52b is disposed at the third end of the second main body portion 52a along the first direction Z and is located on the outer periphery of the second main body portion 52a. A portion of the hook portion 552 is located on the side of the mating portion 52b close to the first housing 51.

[0193] For example, the cover plate 55 may be rectangular, square, polygonal, etc., and be adapted to the shape of the opening at the end of the second housing 52.

[0194] In some examples, there are multiple hooks 552, which are arranged at intervals along the outer periphery of the body plate 551; for example, the shape of the hooks 552 may be L-shaped, hook-shaped, snap-on, etc.

[0195] In some examples, the hook 552 may be integrally formed with the body plate 551, or may be connected to the outer periphery of the body plate 551 by welding or bolting.

[0196] In some examples, the mating part 52b is integrally formed on the edge of the end of the second main body part 52a at the outer periphery of the third end, or is fixed by welding.

[0197] In one example, a portion of the hook 552 is located on the side of the mating portion 52b near the first housing 51, with the end of the hook 552 bypassing the lower side of the mating portion 52b to form a hook structure.

[0198] In this embodiment, the hook portion 552 of the cover plate 55 hooks onto the mating portion 52b of the second housing 52, thereby connecting the cover plate 55 and the second housing 52 and reducing the use of bolts. The hook portion 552 hooking structure is firmly connected and easy to assemble. After the cover plate 55 is closed, it can protect the end structure of the second housing 52 and prevent external impurities from entering. The cooperation between the hook portion 552 and the mating portion 52b also enhances the end sealing.

[0199] In one embodiment of this application, the first locking member 7 is welded to both the first housing 51 and the second housing 52.

[0200] For example, the welding method can be laser welding, arc welding, ultrasonic welding, etc.

[0201] In one example, the first sidewall portion 712 of the first locking member 7, away from the first bottom wall portion 711, is welded to the bottom of the third recess 513 and the fourth recess 522.

[0202] In one example, the battery device 2 includes a second locking member 8, with the first locking member 7 and the second locking member 8 inserted together. The upper and lower positions of the first locking member 7 and the second locking member 8 in contact with the first housing 51 and the second housing 52 are welded together.

[0203] In this embodiment, the first locking member 7 is welded to both the first housing 51 and the second housing 52, resulting in high connection strength and resistance to loosening. The weld seam forms a sealing structure, further improving the sealing performance between the housings 5. Compared to bolted connections, welding reduces the number of connecting parts, resulting in a simpler structure, while also avoiding the sealing hazards caused by bolt holes.

[0204] In some embodiments, the first locking member 7 can be self-piercing riveted to the first housing 51 and the second housing 52.

[0205] Embodiments of this application also provide an electrical device, including the battery device 2 described in the above embodiments.

[0206] like Figures 2 to 4 , Figure 6 and Figure 7 As shown, one embodiment of this application provides a battery device 2, including a plurality of battery cells 6, a plurality of housings 5, and a first locking member 7. The plurality of battery cells 6 are housed within the plurality of housings 5. The plurality of housings 5 ​​include a first housing 51 and a second housing 52, which are stacked along a first direction Z. The first housing 51 has a first positioning portion 511 at one end along the first direction Z near the second housing 52, which is arranged along the outer periphery of the first housing 51. The second housing 52 has a second positioning portion 521 at one end along the first direction Z near the first housing 51, which is arranged along the outer periphery of the second housing 52. The first positioning portion 511 and the second positioning portion 521 are arranged along the first direction Z. At least a portion of the first locking member 7 covers the first positioning portion 511 and the second positioning portion 521 and is connected to both the first housing 51 and the second housing 52.

[0207] In one example, the first housing 51 may include a first side beam and a bottom plate, with the bottom plate connected to a first opening in the first side beam, and the second housing 52 may include a second side beam. When the first housing 51 and the second housing 52 are stacked, the second side beam is connected to the first side beam.

[0208] In some examples, both the first positioning part 511 and the second positioning part 521 are integral ring structures. In some examples, the two opposite end faces of the first locking member 7 along its own length direction are flush with the two end faces of the first housing 51 along its length direction.

[0209] In some examples, the first locking member 7 includes a first locking body 71 and a first recess 72. The first recess 72 extends along the length direction of the first locking member 7 and is disposed on the first locking body 71. A portion of the first locking body 71 is located on both sides of the first recess 72 along a first direction Z. A first positioning portion 511 and a second positioning portion 521 are accommodated in the first recess 72. The first recess 72 extends through both ends of the first locking body 71 along its length direction.

[0210] The battery device 2 also includes a plurality of second locking members 8, which cover the first positioning part 511 and the second positioning part 521. The two ends of the second locking member 8 along its own length direction are respectively inserted into the first recess 72 of two adjacent first locking members 7.

[0211] In another example, the rectangular box 5 has a first locking member 7 on two opposite sides in the circumferential direction and a second locking member 8 on the other two sides.

[0212] The first housing 51 includes a third recess 513, which is recessed from the outer surface of the first housing 51 to the interior of the first housing 51, and a first positioning part 511 protrudes from the bottom surface of the third recess 513; the second housing 52 includes a fourth recess 522, which is recessed from the outer surface of the second housing 52 to the interior of the second housing 52, and a second positioning part 521 protrudes from the bottom surface of the fourth recess 522; a first locking member 7 is respectively accommodated in the third recess 513 and the fourth recess 522; a second locking member 8 is respectively accommodated in the third recess 513 and the fourth recess 522.

[0213] The plurality of housings 5 ​​include a plurality of second housings 52, which are stacked along the first direction Z. The other end of the second housing 52 along the first direction Z has a third positioning part 523. The second positioning parts 521 and the third positioning parts 523 of two adjacent second housings 52 are arranged along the first direction Z. A portion of the plurality of first locking members 7 covers the third positioning parts 523 and the second positioning parts 521 of two adjacent second housings 52.

[0214] The first housing 51 is provided with a sealing groove 53, which is recessed from the end face of the first housing 51 along the first direction Z. The first housing 51 has a first receiving cavity 530, which receives the battery cell 6 and communicates with the sealing groove 53. A sealing member 54 is received in the sealing groove 53 and is bonded to the first housing 51 and the second housing 52.

[0215] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0216] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery device, characterized in that, include: Multiple battery cells; Multiple housings are provided, and multiple battery cells are housed within the multiple housings. The multiple housings include a first housing and a second housing. The first housing and the second housing are stacked along a first direction. The first housing has a first positioning part at one end along the first direction near the second housing. The first positioning part is arranged along the outer periphery of the first housing. The second housing has a second positioning part at one end along the first direction near the first housing. The second positioning part is arranged along the outer periphery of the second housing. The first positioning part and the second positioning part are connected in cooperation along the first direction. A first locking member, at least a portion of which covers the first positioning part and the second positioning part, and is connected to both the first housing and the second housing.

2. The battery device according to claim 1, characterized in that, The two opposite end faces of the first locking member along its own length are respectively flush with the two end faces of the first housing along the length direction.

3. The battery device according to claim 1, characterized in that, The first locking member includes a first locking body and a first recess. The first recess extends along the length direction of the first locking member and is disposed on the first locking body. A portion of the first locking body is located on both sides of the first recess along the first direction. The first positioning part and the second positioning part are accommodated in the first recess.

4. The battery device according to claim 3, characterized in that, The first recess extends through both ends of the first locking body along the length direction.

5. The battery device according to claim 3, characterized in that, The first locking body includes a first protrusion, a first bottom wall portion, and two first side wall portions opposite each other along the first direction, the two first side wall portions being connected to the first bottom wall portion to define the first recess; The first protrusion is connected to one end of the first bottom wall portion along the length direction, and the first protrusion of one of the two adjacent first locking members is inserted into the first recess of the other first locking member.

6. The battery device according to claim 3, characterized in that, It also includes a plurality of second locking members, the second locking members covering the first positioning part and the second positioning part, and at least one end of the second locking member along its own length direction is inserted into the first recess.

7. The battery device according to claim 6, characterized in that, The two ends of the second locking member along its own length direction are respectively inserted into the first recess of the two adjacent first locking members.

8. The battery device according to claim 7, characterized in that, The second locking member includes two second protrusions, a second bottom wall portion and two second side wall portions. The two second side wall portions are arranged opposite to each other along the first direction and are both connected to one side of the second bottom wall portion to define a second recess. The first positioning portion and the second positioning portion are accommodated in the second recess. The second protrusion is connected to both ends of the second bottom wall along the length direction of the second locking member, and the second protrusion is inserted into the first recess.

9. The battery device according to any one of claims 1 to 8, characterized in that, The first housing includes a third recess, which is recessed from the outer surface of the first housing into the interior of the first housing, and the first positioning part protrudes from the bottom surface of the third recess; The second housing includes a fourth recess, which is recessed from the outer surface of the second housing into the interior of the second housing, and the second positioning part protrudes from the bottom surface of the fourth recess; The first locking member is respectively accommodated in the third recess and the fourth recess.

10. The battery device according to any one of claims 1 to 8, characterized in that, The second housing has a third positioning part at the other end along the first direction.

11. The battery device according to claim 10, characterized in that, The plurality of boxes include a plurality of second boxes, the plurality of second boxes are stacked along the first direction, and the second positioning part and the third positioning part of two adjacent second boxes are arranged along the first direction; A portion of the plurality of first locking members covers the third positioning portion and the second positioning portion.

12. The battery device according to any one of claims 1 to 8, characterized in that, The first housing and / or the second housing are provided with a sealing groove, which is recessed from the end face of the first housing and / or the second housing along the first direction.

13. The battery device according to claim 12, characterized in that, Both the first housing and the second housing have a first receiving cavity, which contains the battery cell and is connected to the sealing groove.

14. The battery device according to claim 12, characterized in that, It also includes a sealing element, which is accommodated in the sealing groove and bonded to the first housing and the second housing.

15. The battery device according to any one of claims 1 to 8, characterized in that, The first housing also includes a first main body, and the first positioning part is disposed at the first end of the first main body along the first direction and located on the outer periphery of the first main body. The first positioning part has a fifth recess, which is recessed by the end face of the first end. The second housing also includes a second main body, the second positioning part is disposed at the second end of the second main body along the first direction and located on the outer periphery of the second main body, a portion of the second positioning part protrudes from the end face of the second end, and the second positioning part is accommodated in the fifth recess; The battery device further includes a seal that is accommodated in the fifth recess and is located between the second positioning portion and the first main body portion.

16. The battery device according to any one of claims 1 to 8, characterized in that, It also includes a cover plate, which is used to cover the side of the second box body away from the first box body. The cover plate includes a body plate and a hook, which is disposed on the outer periphery of the body plate and protrudes toward the second box body. The second housing also includes a second main body and a mating part. The mating part is disposed at the third end of the second main body along the first direction and located on the outer periphery of the second main body. A portion of the hook is located on the side of the mating part close to the first housing.

17. The battery device according to any one of claims 1 to 8, characterized in that, The first locking component is welded to both the first housing and the second housing.

18. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 17.

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