Box body assembly, battery device and power utilization device

Abstract

The embodiment of the utility model provides a box body assembly, a battery device and a power utilization device, the battery device comprises a battery monomer and a plurality of sub box bodies, the plurality of sub box bodies jointly define a containing space, the battery monomer is located in the containing space, each sub box body comprises a first box body, and the first box body comprises a body and a sealing edge; the body forms a part of the inner wall of the containing space, the sealing edge is arranged on the edge of the body, the sealing edge is of a continuous fiber composite material structure, at least part of the sealing edge is bent and extends, so that the sealing edge forms a multi-layer structure stacked in the first direction, and the multi-layer structure is in sealing fit with other sub-box bodies in the first direction. According to the battery device in the embodiment of the invention, the structural strength is favorably improved, and the sealing effect between the battery device and other sub-boxes is favorably improved; the multi-layer structure is formed in a bending edge sealing mode in the manufacturing process, so that the continuity of fibers among different layers of structures in the multi-layer structure is kept, the manufacturing process of the multi-layer structure is simplified, and the production efficiency is improved.

Description

Technical Field

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

[0002] In recent years, in order to improve the energy density of battery devices, composite materials have been used to manufacture the battery device housing components in order to reduce the weight of the housing components.

[0003] The enclosure assembly comprises multiple sub-enclosures, each sealed together by its own sealing surface. To improve the sealing effect, the thickness of the sealing surface structure of each sub-enclosure is greater than the thickness of the structure of other parts of the sub-enclosure.

[0004] In related technologies, a multi-layer lamination manufacturing process is used to create a thicker structure that forms a sealing surface. This involves laying multiple layers of composite materials stacked on top of each other along the normal direction of the sealing surface. However, the multi-layer lamination manufacturing process is time-consuming, and the fibers in each composite material layer are not connected to each other, which is not conducive to improving the overall strength of the structure. Utility Model Content

[0005] In view of this, embodiments of this application aim to provide a housing assembly, battery device, and power supply device that are conducive to improving manufacturing efficiency.

[0006] To achieve this objective, the technical solution of this application embodiment is implemented as follows:

[0007] This application provides a battery device, the battery device comprising:

[0008] Battery cell;

[0009] Multiple sub-boxes are arranged together to form a receiving space. The battery cell is located within the receiving space. Each sub-box includes a first box, which includes a body and a sealing edge. The body forms part of the inner wall of the receiving space. The sealing edge is located at the edge of the body and is a continuous fiber composite material structure that is at least partially bent and extended to form a multi-layer structure stacked along a first direction. The multi-layer structure is sealed and fitted with the other sub-boxes along the first direction.

[0010] The battery device in this embodiment, with a fixed edge thickness, forms a multi-layer structure by stacking the edge seals. This is beneficial for increasing the dimension of the sealing fit between the first housing and other sub-housing housings along the first direction, thereby improving structural strength and enhancing the sealing effect with other sub-housing housings. It is also beneficial for forming a multi-layer structure by bending the edge seals during the manufacturing process, thereby maintaining the fiber continuity between different layers in the multi-layer structure. Furthermore, it simplifies the manufacturing process of the multi-layer structure, reduces production costs, and improves production efficiency.

[0011] In some embodiments, the edge banding comprises multiple layers of continuous fiber composite material, each layer comprising continuous fibers and a thermoplastic resin matrix, the thermoplastic resin matrix being connected to the continuous fibers. The composite material formed by the continuous fibers and the thermoplastic resin matrix possesses high strength, high rigidity, and high toughness, which helps to improve the structural strength and rigidity of the edge banding, and is beneficial for improving the sealing effect and connection stability with other sub-boxes. Using a thermoplastic resin matrix as the matrix material allows the edge banding to be softened and shaped repeatedly through heating, thus improving its processability.

[0012] In some embodiments, the sealing edge includes a sealing portion and a stacked portion. The sealing portion is connected to the body, and one side of the sealing portion along a first direction seals against other sub-cells along the first direction. At least a portion of the stacked portion is located on the other side of the sealing portion and together with the sealing portion forms the multi-layer structure. This helps to reduce the adverse effects of the curved portion of the sealing edge on the sealing effect with other sub-cells, thereby improving the sealing performance of the battery device.

[0013] In some embodiments, a portion of the continuous fibers in the edge sealing is located in the sealing portion, and another portion is located in the overlapping portion. This ensures continuity between the fibers in the sealing portion and the fibers in the overlapping portion, which helps improve the overall structural strength and rigidity of the edge sealing.

[0014] In some embodiments, the stacked portion further includes a first curved portion and a stacked sub-portion. The first curved portion is located at the end of the sealing portion away from the main body. The first curved portion bends and extends toward the sealing portion along a first direction away from the other sub-boxes and connects the stacked sub-portion to the sealing portion. The stacked sub-portion connected to the first curved portion fits against the sealing portion along the first direction, and the stacked sub-portion and the sealing portion together form the multi-layer structure. Thus, on the one hand, through the bending deformation of the first curved portion, a portion of the sealing edge can be located on one side of the sealing portion along the first direction and fit against the sealing portion to form the stacked sub-portion; on the other hand, the first curved portion can shield and protect the sealing portion, reducing the probability of damage to the sealing interface between the sealing portion and other sub-boxes during the use of the battery device.

[0015] In some embodiments, there are multiple stacked sub-parts, which are stacked along the first direction. Each stacked sub-part further includes a second curved portion that bends and extends away from the sealing portion and connects two adjacent stacked sub-parts along the first direction. Thus, by repeatedly bending the sealing edge to form multiple stacked sub-parts, it is advantageous to adjust the dimensions of the multilayer structure along the first direction by adjusting the number of stacked sub-parts, while keeping the thickness of the sealing edge constant, so that the structural strength of the multilayer structure meets the requirements.

[0016] In some embodiments, the edge sealing is wound to form a wound body, the axis of the wound body being perpendicular to the first direction, and a portion of the outermost layer of the wound body along the first direction near the other sub-boxes forms the sealing portion. Thus, during manufacturing, it is possible to always roll in the same direction to form a multi-layer structure, which simplifies the manufacturing process of multi-layer structures and improves production efficiency.

[0017] In some embodiments, the body includes a first wall extending along the first direction and forming part of the inner wall of the receiving space. One end of the first wall along the first direction is connected to the sealing portion, and the overlapping portion is spaced apart from the first wall. Thus, the gap between the overlapping portion and the first wall reduces the probability of interference between the sealing edge and the body due to manufacturing errors, deformation, or other factors during the formation of the overlapping portion at the sealing edge.

[0018] In some embodiments, the first housing further includes a filler that fills the gap between the stacked portion and the first wall and connects the first wall, the stacked portion, and the sealing portion. Thus, on the one hand, the filler helps to fix the relative positions of the first wall, the stacked portion, and the sealing portion, improving the overall structural strength of the first housing; on the other hand, it helps to reduce the risk of foreign objects entering the gap between the stacked portion and the first wall and damaging the sealing portion of the first housing.

[0019] In some embodiments, the edge banding includes a thermoplastic resin matrix, and the filler is connected to the thermoplastic resin matrix, wherein the filler is made of the same material as the thermoplastic resin matrix. This improves the connection strength between the filler and the edge banding, simplifies the manufacturing process of the first housing, and reduces production costs.

[0020] In some embodiments, the first housing is a continuous fiber composite material structure and is a one-piece molded structure, such that a portion of the continuous fibers in the first housing are located in the body and another portion is located in the edge sealing. This simplifies the manufacturing process of the first housing and improves its overall structural strength.

[0021] In some embodiments, the thickness of the body is the same as the thickness of the edge banding. This allows for the formation of both the edge banding and the body from composite material sheets of uniform thickness, simplifying the manufacturing process and improving production efficiency.

[0022] In some embodiments, the battery device further includes fasteners, and the multi-layer structure has mounting holes extending along the first direction. The fasteners pass through the mounting holes and connect with other sub-casings to secure the first casing to the other sub-casings. Thus, the better structural strength of the multi-layer structure allows the fasteners to apply a greater tightening force between the first casing and other sub-casings, resulting in a stronger connection and improved sealing.

[0023] This application also provides an electrical device, which includes any of the battery devices described in the foregoing embodiments, and the battery device is used as a power source for the electrical device. This is advantageous because it improves the sealing and structural strength of the battery device itself, thereby extending the service life of both the battery device and the electrical device.

[0024] This application embodiment also provides a housing assembly for accommodating a single battery cell. The housing assembly includes multiple sub-housing units, which together enclose a accommodating space for accommodating the single battery cell. Each sub-housing unit includes a first housing unit, which includes a body and a sealing edge. The body forms part of the inner wall of the accommodating space. The sealing edge is located at the edge of the body and seals against other sub-housing units along a first direction. The sealing edge is a continuous fiber composite material structure, integrally molded, and bent, so that at least a portion of the sealing edge is stacked along the first direction to form a multi-layer structure. This increases the dimension of the portion of the first housing unit that seals against other sub-housing units along the first direction, thereby improving structural strength and enhancing the sealing effect with other sub-housing units, thus improving the sealing performance of the housing assembly. It also facilitates the formation of a multi-layer structure during manufacturing by bending the sealing edge, maintaining the fiber continuity between different layers in the multi-layer structure. Furthermore, it simplifies the manufacturing process of the multi-layer structure, reduces production costs, increases production efficiency, and further improves the overall sealing performance of the housing assembly.

[0025] In some embodiments, the sealing edge includes a sealing portion and a stacked portion. The sealing portion seals against other sub-cells along the first direction and is connected to the main body. The stacked portion is located on a side of the sealing portion away from the other sub-cells along the first direction. The stacked portion and the sealing portion together form the multi-layer structure. This helps to reduce the adverse effects of the curved portion of the sealing edge on the sealing effect with other sub-cells, and improves the sealing performance of the battery device.

[0026] In some embodiments, a portion of the continuous fibers in the edge sealing is located in the sealing portion, and another portion is located in the overlapping portion. This ensures continuity between the fibers in the sealing portion and the fibers in the overlapping portion, which helps improve the overall structural strength and rigidity of the edge sealing.

[0027] In some embodiments, the stacked portion further includes a first curved portion and a stacked sub-portion. One end of the first curved portion is connected to the sealing portion. The first curved portion bends and extends toward the sealing portion along a first direction away from the other sub-boxes and connects to the stacked sub-portion. The stacked sub-portion connected to the first curved portion fits against the sealing portion along the first direction. Thus, on the one hand, the bending deformation of the first curved portion allows a portion of the sealing edge to be located on one side of the sealing portion along the first direction and fits against the sealing portion to form the stacked sub-portion; on the other hand, the first curved portion can shield and protect the sealing portion, reducing the probability of damage to the sealing interface between the sealing portion and other sub-boxes during battery device use.

[0028] In some embodiments, the body includes a first wall extending along the first direction and forming part of the inner wall of the receiving space. One end of the first wall along the first direction is connected to the sealing portion, and the overlapping portion is spaced apart from the first wall. Thus, the gap between the overlapping portion and the first wall reduces the probability of interference between the sealing edge and the body due to manufacturing errors, deformation, or other factors during the formation of the overlapping portion at the sealing edge.

[0029] In some embodiments, the first housing further includes a filler that fills the gap between the stacked portion and the first wall and connects the first wall, the stacked portion, and the sealing portion. Thus, on the one hand, the filler helps to fix the relative positions of the first wall, the stacked portion, and the sealing portion, improving the overall structural strength of the first housing; on the other hand, it helps to reduce the risk of foreign objects entering the gap between the stacked portion and the first wall and damaging the sealing portion of the first housing.

[0030] In some embodiments, the edge banding includes a thermoplastic resin matrix, and the filler is connected to the thermoplastic resin matrix, wherein the filler is made of the same material as the thermoplastic resin matrix. This improves the connection strength between the filler and the edge banding, simplifies the manufacturing process of the first housing, and reduces production costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of an embodiment of the present application where the electrical device is a vehicle;

[0032] Figure 2 This is a schematic diagram of a battery device in one embodiment of this application;

[0033] Figure 3 This is a schematic diagram of a box assembly formed by multiple sub-boxes in one embodiment of this application;

[0034] Figure 4 for Figure 3 A cross-sectional diagram of position AA in the middle;

[0035] Figure 5 for Figure 4 A magnified view of the area at position C in the middle;

[0036] Figure 6 This is a cross-sectional view of the sealing edge in one embodiment of this application;

[0037] Figure 7 for Figure 6 A magnified view of a portion of position D in the middle;

[0038] Figure 8 This is a partially enlarged cross-sectional view of the housing assembly in the second embodiment of this application. The enlarged cross-sectional position is... Figure 4 The position of C in the middle is the same;

[0039] Figure 9 This is a partially enlarged cross-sectional view of the housing assembly in the third embodiment of this application. The enlarged cross-sectional position is related to... Figure 4 The position of C in the middle is the same;

[0040] Figure 10 for Figure 3 A magnified view of the sectioned area at position BB;

[0041] Figure 11 This is a schematic diagram corresponding to step S10 in the manufacturing method of the first box in one embodiment of this application;

[0042] Figure 12 This is a schematic diagram corresponding to step S20 in the manufacturing method of the first box in one embodiment of this application, and its cutting position is located at... Figure 11 The EE position in the middle;

[0043] Figure 13 for Figure 12 A magnified view of the middle F position;

[0044] Figure 14 This is a schematic diagram corresponding to step S40 in the manufacturing method of the first box in one embodiment of this application;

[0045] Figure 15 This is a schematic diagram corresponding to step S50 in the manufacturing method of the first box in one embodiment of this application;

[0046] Explanation of reference numerals in the attached figures

[0047] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing Assembly; 11, Sub-Housing; 11a, Accommodation Space; 12, First Housing; 121, Body; 1211, First Wall; 122, Edge Sealing; 122a, Multi-layer Structure; 122b, Mounting Hole; 1221, Continuous Fiber Composite Layer; 1221a, Continuous Fiber; 1221b, Thermoplastic Resin Matrix; 1222, Sealing Part; 1223, Stacked Part; 1223a, First Bending Part; 1223b, Stacked Sub-part; 1223c, Second Bending Part; 1224, Winding Body; 123, Filler; 13, Fastener; 20, Battery Cell; 30, Composite Material Plate; 31, Body Forming Area; 32, Edge Sealing Forming Area; 40, First Mold; 50, Second Mold; 51, Flip-over Part. Detailed Implementation

[0048] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and drawings of this application are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0053] In the description of the embodiments of this application, for ease of explanation, as shown in the accompanying drawings, the direction of arrow X is referred to as the "first direction".

[0054] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the terms in the embodiments of this application can be understood according to the specific circumstances.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0056] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0057] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0058] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0059] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0060] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0061] In some implementations, the electrode assembly is a stacked structure.

[0062] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0063] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0064] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0065] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0066] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0067] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0068] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0069] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0070] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0071] As an example, the battery cell 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 prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0072] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0073] In some embodiments, a pressure relief mechanism is provided on the casing. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0074] As an example, the internal pressure or temperature of a battery cell is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby creating an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell.

[0075] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0076] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0077] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the mechanism, etc. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0078] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0079] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0080] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0081] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0082] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0083] In some embodiments, the battery device may be a battery pack, which includes a housing assembly and one or more individual battery cells housed within the housing assembly.

[0084] As an example, the battery cell assembly can be a battery module, which can be housed in the housing assembly by fixing the battery module in the housing assembly.

[0085] As an example, battery cell assemblies can also be housed within a housing assembly by directly fixing multiple battery cells to the housing assembly.

[0086] In some embodiments, the housing assembly may be part of the vehicle's chassis structure. For example, a portion of the housing assembly may be at least a portion of the vehicle's floor, or a portion of the housing assembly may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0087] As an example, see Figure 2 The housing assembly 10 may include two sub-housing units. The two sub-housing units interlock to form a closed space inside the housing assembly 10 to house the individual battery cells. Here, "closed" refers to covering or shutting off; it can be sealed or not sealed.

[0088] As an example, the housing assembly 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing assembly forms an enclosed space to house the individual battery cells. One of the two sub-housing units may be the top cover, and the other may be the bottom plate.

[0089] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0090] In the following embodiments, for ease of explanation, a vehicle 1000 is used as an example of an electrical device according to an embodiment of this application. The description is as follows with reference to the accompanying drawings.

[0091] Vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc. For example... Figure 1 As shown, a battery device 100 is installed inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0092] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0093] The embodiments of this application will now be described in detail.

[0094] In related technologies, to improve the energy density of battery devices, composite materials are used to replace metal materials for the housing assembly in order to reduce weight. The housing assembly is formed by splicing multiple sub-housing units together. Each sub-housing unit has an edge seal, which is used to seal against other sub-housing units and is secured to them using fasteners. To withstand the forces of the fasteners and improve the sealing effect, and because composite materials have lower stiffness than metal materials, the edge seal is thicker than the rest of the sub-housing unit to increase its structural strength.

[0095] In the process of manufacturing edge sealing for composite materials, multiple layers of composite materials are typically laid sequentially at different heights to overlap each other, and then extruded using a mold along the stacking direction to form a multi-layer structure. This method is suitable for composite materials using thermosetting materials, but because it requires laying composite materials at different heights multiple times, the process is time-consuming. Each layer of composite material includes a resin matrix and fibers. Since the laid composite layers are independent of each other, even after molding to form the edge sealing, the fibers in adjacent composite layers are not connected to each other; the connection is only achieved through the fusion of the resin matrix, which is not conducive to improving the structural strength of the edge sealing.

[0096] Based on the aforementioned technical problems, this application aims to provide a housing assembly, a battery device, and an electrical device. The battery device includes a first housing, the edge of which is sealed to seal with other sub-housing units within the battery device. The edge is a continuous fiber composite material structure, integrally molded, and bent and extended to form a multi-layer structure. In this way, the fibers in each layer of the multi-layer structure are interconnected, and the multi-layer structure is formed by bending the edge, which simplifies the manufacturing process of the multi-layer structure.

[0097] Specifically, see Figures 2 to 5 This application provides a battery device 100. The battery device 100 includes a single battery cell 20 and a plurality of sub-cells 11.

[0098] Multiple sub-boxes 11 are arranged together to form a receiving space 11a, and the battery cell 20 is located within the receiving space 11a. The sub-boxes 11 include a first box 12, which includes a body 121 and a sealing edge 122. The body 121 forms part of the inner wall of the receiving space 11a, and the sealing edge 122 is located at the edge of the body 121. The sealing edge 122 is a continuous fiber 1221a composite material structure and is at least partially bent and extended so that the sealing edge 122 forms a multi-layer structure 122a stacked along a first direction. The multi-layer structure 122a is sealed and fitted with the other sub-boxes 11 along the first direction.

[0099] The accommodating space 11a provides installation space for the arrangement of the battery cells 20 and also protects the battery cells 20.

[0100] The sealing edge 122 is sealed to the other sub-boxes 11 to isolate the receiving space 11a from the outside of the battery device 100, thereby reducing the probability of foreign objects entering the receiving space 11a and damaging the battery cell 20.

[0101] The edge banding 122 is a continuous fiber 1221a composite material structure, which refers to a structural component manufactured by means of continuous fiber 1221a composite material through mold extrusion molding and other methods.

[0102] The edge seal 122 is made of continuous fiber 1221a composite material, which is conducive to the one-time molding of the overall structure of the edge seal 122, thereby reducing the manufacturing process of the edge seal 122; at the same time, the low density of the continuous fiber 1221a composite material is conducive to reducing the overall weight of the battery device 100.

[0103] The edge sealing 122 forms a multi-layer structure 122a stacked along the first direction, meaning that at least two parts of the edge sealing 122 have overlapping projection ranges in a projection plane perpendicular to the first direction.

[0104] It is understood that the continuous fiber 1221a in the edge sealing 122 can be bent as the edge sealing 122 bends, so that different parts of the same continuous fiber 1221a are located in different layers of the multilayer structure 122a.

[0105] In this embodiment of the battery device 100, with a fixed thickness of the sealing edge 122, a multi-layer structure 122a is formed by stacking the sealing edges 122. This is beneficial for increasing the size of the sealing fit between the first housing 12 and other sub-housing housings 11 along the first direction, thereby improving structural strength and enhancing the sealing effect with other sub-housing housings 11. It is also beneficial for forming the multi-layer structure 122a by bending the sealing edge 122 during the manufacturing process, thereby maintaining the continuity of fibers between different layers in the multi-layer structure 122a. Furthermore, it is beneficial for simplifying the manufacturing process of the multi-layer structure 122a, reducing production costs, and improving production efficiency.

[0106] The multi-layer structure 122a formed by the edge sealing 122 can have two, three, four, five, six, or seven layers.

[0107] In some embodiments, see Figure 6 and Figure 7 The edge sealing 122 includes a multilayer continuous fiber composite material layer 1221, each of which includes continuous fibers 1221a and a thermoplastic resin matrix 1221b, with the thermoplastic resin matrix 1221b connected to the continuous fibers 1221a.

[0108] It is understandable that the multilayer continuous fiber composite material layers 1221 are stacked on top of each other.

[0109] Continuous fiber 1221a composite material is a composite material formed by embedding continuous fibers 1221a into a matrix material. The continuous fibers 1221a exist continuously throughout the material, which is used to make the formed structure have high strength and high stiffness, while the matrix material helps to transfer loads and distribute stress between different continuous fibers 1221a, reducing the risk of continuous fiber 1221a fracture.

[0110] The composite material formed by continuous fiber 1221a and thermoplastic resin matrix 1221b has the characteristics of high strength, high rigidity and high toughness, which helps to improve the structural strength and structural rigidity of the edge seal 122, and is beneficial to improving the sealing effect of the edge seal 122 and the connection stability between it and other sub-boxes 11.

[0111] Using a thermoplastic resin matrix as the matrix material allows the edge banding 122 to be softened and shaped repeatedly through heating, which improves the processability of the edge banding 122.

[0112] The multilayer continuous fiber composite material layer 1221 can be tightly bonded by heating and molding along the stacking direction between the layers, and the required edge sealing 122 is formed according to the different shapes of the molding die.

[0113] In some embodiments, the continuous fiber 1221a is a continuous glass fiber.

[0114] Glass fiber is an inorganic fiber material with high tensile strength, good rigidity, non-flammability, and resistance to chemical corrosion.

[0115] Continuous glass fiber possesses high strength and good resilience. Composites of continuous glass fiber with a thermoplastic resin matrix 1221b help improve the tensile strength of the edge banding 122 and also extend its service life.

[0116] In some embodiments, see Figure 7 The thickness of the single-layer continuous fiber composite material layer 1221 is 0.2 mm to 0.3 mm. That is, the thickness of the single-layer continuous fiber composite material layer 1221 is L1, 0.2 mm ≤ L1 ≤ 0.3 mm.

[0117] In this way, on the one hand, the risk of insufficient structural strength and rigidity due to the excessively low thickness of the single-layer continuous fiber composite material layer 1221 is reduced; on the other hand, the problem of excessively high thickness of the edge sealing 122 due to the excessively high thickness of the continuous fiber composite material layer 1221 during multi-layer laying is reduced.

[0118] The specific thickness of the single-layer continuous fiber composite layer 1221 can be 0.2mm, 0.22mm, 0.24mm, 0.25mm, 0.26mm, 0.28mm, 0.3mm, etc.

[0119] It is understood that in the same continuous fiber composite layer 1221, there are multiple continuous fibers 1221a and each continuous fiber 1221a extends in the same direction.

[0120] It is understandable that in two adjacent continuous fiber composite material layers 1221, the continuous fibers 1221a extend in different directions to improve the tensile strength of the edge seal 122 in different directions.

[0121] In some embodiments, the layup angle of the continuous fibers 1221a in the single-layer continuous fiber composite layer 1221 is from -90° to 90°.

[0122] This helps to enhance the tensile strength, shear strength, and fatigue resistance of the edge banding 122 in different directions.

[0123] The laying angle of the continuous fiber 1221a in the single-layer continuous fiber composite layer 1221 can be 0°, 45°, 90°, -45°, etc.

[0124] It should be noted that 0° refers to the length direction of the battery device 100, and 90° refers to the width direction of the battery device 100. 0° and 90° are perpendicular to each other. The layup angle of the continuous fibers 1221a in the continuous fiber composite layer 1221111 is based on the direction of the 0° layup. For example, a layup angle of 45° for continuous fiber 1221a means that the angle between the layup direction of continuous fiber 1221a and the 0° direction is 45°.

[0125] The specific material of the thermoplastic resin matrix 1221b can be one of PA (Polyamide), PE (Polyethylene), PPS (Polyphenylenesulfide), or PEK (poly(etherketone)).

[0126] It is understandable that during the manufacturing process of the edge banding 122, the multi-layer structure 122a needs to be extruded along the first direction to reduce the outer contour size of the multi-layer structure 122a, and at the same time, to make the layers in the multi-layer structure 122a fit together more tightly.

[0127] Understandably, the edge sealing 122 is used in areas that seal with other sub-boxes 11, and its manufacturing requirements are better to achieve a good sealing effect.

[0128] In some embodiments, see Figure 5 , Figure 8 and Figure 9 The edge sealing 122 includes a sealing part 1222 and a stacking part 1223. The sealing part 1222 is connected to the body 121. The sealing part 1222 is sealed and engaged with other sub-boxes 11 along the first direction on one side. At least a portion of the stacking part 1223 is located on the other side of the sealing part 1222 and together with the sealing part 1222, forms a multi-layer structure 122a.

[0129] A portion of the sealing edge 122 bends and extends to one side of the sealing portion 1222 along the first direction to form a stacked portion 1223. The sealing portion 1222 does not need to be bent, while the stacked portion 1223 requires bending deformation. Therefore, the sealing portion 1222 is easier to manufacture with higher precision than the stacked portion 1223. Simultaneously, during the extrusion process of the multilayer structure 122a during manufacturing, the surface of the sealing portion 1222 facing away from the stacked portion 1223 can always remain in contact with the mold, which also helps ensure that this side surface of the sealing portion 1222 meets the manufacturing precision requirements.

[0130] This helps to reduce the adverse effects of the curved portion of the sealing edge 122 on the sealing effect between it and other sub-boxes 11, and helps to improve the sealing performance of the battery device 100.

[0131] In some embodiments, a portion of the continuous fiber 1221a in the sealing 122 is located in the sealing portion 1222, and another portion is located in the overlapping portion 1223.

[0132] In this way, the fibers in the sealing part 1222 and the fibers in the overlapping part 1223 remain continuous, which is beneficial to improving the overall structural strength and structural rigidity of the sealing edge 122.

[0133] In some embodiments where a continuous fiber composite material layer 1221 is provided, a portion of the continuous fiber composite material layer 1221 is located in the sealing portion 1222 and another portion is located in the stacking portion 1223.

[0134] The number of stacked parts 1223 is unlimited; there can be one or more.

[0135] In some embodiments, see Figure 5The stacking portion 1223 also includes a first curved portion 1223a and a stacked sub-portion 1223b. The first curved portion 1223a is located at the end of the sealing portion 1222 away from the main body 121. The first curved portion 1223a bends and extends toward the sealing portion 1222 along a first direction away from the other sub-boxes 11 and connects the stacking portion 1223 and the sealing portion 1222. The stacked sub-portion 1223b connected to the first curved portion 1223a fits against the sealing portion 1222 along the first direction.

[0136] Thus, on the one hand, through the bending deformation of the first bending portion 1223a, a portion of the sealing edge 122 can be located on one side of the sealing portion 1222 along the first direction and fit with the sealing portion 1222 to form the overlapping portion 1223; on the other hand, the first bending portion 1223a can shield and protect the sealing portion 1222, reducing the probability of damage to the sealing interface between the sealing portion 1222 and other sub-boxes 11 during the use of the battery device 100.

[0137] Understandably, the first curved portion 1223a forms the edge of the sealing edge 122 away from the body 121.

[0138] In some embodiments, see Figure 5 The surface of the first curved portion 1223a away from the main body 121 is an arc surface to reduce the probability of the first curved portion 1223a being damaged by collision during the use of the battery device 100.

[0139] It is understood that a portion of the continuous fiber 1221a is located within the first curved portion 1223a in order to maintain fiber continuity between the sealing portion 1222 and the stacked portion 1223.

[0140] In some embodiments, see Figure 8 The number of overlapping sub-parts 1223b is multiple, and the multiple overlapping sub-parts 1223b are stacked along the first direction. The sealing edge 122 also includes a second curved part 1223c, which bends and extends away from the sealing part 1222 and connects two adjacent overlapping sub-parts 1223b along the first direction.

[0141] In other words, a portion of the edge banding 122 bends and extends back and forth to form multiple overlapping sub-sections 1223b.

[0142] Thus, by repeatedly bending the edge 122 to form multiple overlapping sub-parts 1223b, it is advantageous to adjust the dimensions of the multi-layer structure 122a along the first direction by adjusting the number of overlapping sub-parts 1223b when the thickness of the edge 122 is a fixed value, so that the structural strength of the multi-layer structure 122a meets the requirements.

[0143] It is understood that in some embodiments where the number of second bends 1223c is multiple, referring to the figures, a portion of the second bends 1223c is located at the end of the stacked sub-part 1223b to which it is connected that is closer to the body 121, and another portion of the second bends 1223c is located at the end of the stacked sub-part 1223b to which it is connected that is farther away from the body 121.

[0144] Understandably, see Figure 8 The stacked sub-part 1223b, which is closest to the sealing part 1222 along the first direction, has one end near the body 121 connected to a second curved part 1223c.

[0145] It is understood that in some embodiments where the number of second curved portions 1223c is multiple, multiple bends are required during the manufacturing of the bent edge 122 to form the first curved portion 1223a and the second curved portion 1223c. The direction of each bend is opposite to the direction of the previous bend; that is, if one bend is made towards the first side of the first direction, then the next bend is made towards the first direction a second time. The curved portion formed by the last bend is the first curved portion 1223a, and the curved portions formed each time before are the second curved portions 1223c.

[0146] In some embodiments, see Figure 9 The edge sealing 122 is wound to form a wound body 1224. The axis of the wound body 1224 is perpendicular to the first direction. The outermost layer of the wound body 1224 forms a sealing part 1222 on the side of the other sub-boxes 11 along the first direction.

[0147] Thus, during the manufacturing process, the multi-layer structure 122a can always roll in the same direction to form the multi-layer structure 122a, which helps to simplify the manufacturing process of the multi-layer structure 122a and improve production efficiency.

[0148] In the wound body 1224 formed by winding, along the first direction, each layer structure located on the side of the sealing part 1222 forms a stacked sub-part 1223b.

[0149] It is understandable that the portion of the wound body 1224 outside the sealing portion 1222 forms the stacked portion 1223.

[0150] In embodiments where there are multiple stacked sub-parts 1223b, the specific number of stacked sub-parts 1223b can be two, three, four, five, six, etc.

[0151] It is understandable that two adjacent stacked sub-parts 1223b are fitted together along the first direction.

[0152] In some embodiments, see Figure 5The thickness of the sealing part 1222 is the same as the thickness of the stacked sub-part 1223b, that is, the thickness of the sealing part 1222 is L21 and the thickness of the stacked sub-part 1223b is L22, L21=L22.

[0153] This makes it easier to ensure that the thickness of the edge banding 122 is the same at all positions, which facilitates the manufacturing of the edge banding 122 and also makes it easier to control the amount of deformation at each position of the edge banding 122 during the bending process.

[0154] It is understood that the thickness of the sealing part 1222 is the dimension of the sealing part 1222 along the first direction, and the thickness of the stacked sub-part 1223b is the dimension of the stacked part 1223 along the first direction.

[0155] The multi-layer structure 122a can be cut along the first direction, and the thickness dimensions of the sealing part 1222 and the stacked part 1223b along the first direction can be measured by vernier calipers to obtain the thickness dimensions of the sealing part 1222 and the stacked part 1223b respectively.

[0156] It is understandable that the dimension of the multilayer structure 122a along the first direction is greater than the thickness dimension of the sealing edge 122.

[0157] In some embodiments, the dimension of the multilayer structure 122a along the first direction is an integer multiple of the thickness dimension of the edge banding 122, and the specific multiple can be 2 times, 3 times, 4 times, 5 times, 6 times, etc.

[0158] In some embodiments, see Figure 5 , Figure 8 and Figure 9 The body 121 includes a first wall 1211, which extends along a first direction and forms part of the inner wall of the receiving space 11a. One end of the first wall 1211 along the first direction is connected to the sealing part 1222, and the stacking part 1223 is spaced apart from the first wall 1211.

[0159] Thus, by using the gap between the overlapping portion 1223 and the first wall 1211, the probability of interference between the sealing edge 122 and the body 121 due to manufacturing errors, deformation, or other factors is reduced during the process of forming the overlapping portion 1223 of the sealing edge 122.

[0160] The minimum distance between the stacked portion 1223 and the first wall 1211 ranges from 2.5mm to 3.5mm, that is, the minimum distance between the stacked portion 1223 and the first wall 1211 is L4, where 2.5mm ≤ L4 ≤ 3.5mm. Specific values ​​for the minimum distance between the stacked portion 1223 and the first wall 1211 can be 2.5mm, 2.75mm, 3mm, 3.25mm, 3.5mm, etc.

[0161] In some embodiments, see Figure 5 The connection between the first wall 1211 and the edge seal 122 is a rounded transition to reduce the risk of the connection between the first wall 1211 and the edge seal 122 breaking due to stress concentration.

[0162] In some embodiments, see Figure 5 , Figure 8 and Figure 9 The first housing 12 also includes a filler 123, which fills the gap between the stacked portion 1223 and the first wall 1211 and connects the first wall 1211, the stacked portion 1223 and the sealing portion 1222.

[0163] Thus, on the one hand, the filler 123 helps to fix the relative positions of the first wall 1211, the stacked portion 1223 and the sealing portion 1222, thereby improving the overall structural strength of the first housing 12; on the other hand, it helps to reduce the risk of foreign objects entering the gap between the stacked portion 1223 and the first wall 1211 and causing damage to the sealing portion 1222 of the first housing 12.

[0164] In some embodiments, the edge banding 122 includes a thermoplastic resin matrix 1221b, and a filler 123 is connected to the thermoplastic resin matrix 1221b, wherein the material of the filler 123 is the same as that of the thermoplastic resin matrix 1221b.

[0165] This helps to improve the connection strength between the filler 123 and the sealing edge 122, and also helps to simplify the manufacturing process of the first box 12 and reduce production costs.

[0166] The specific method of forming the filler 123 is not limited. In some embodiments, thermoplastic resin is directly heated and injected into the gap between the stacked portion 1223 and the first wall 1211, and the filler 123 is formed after the thermoplastic resin cools. In other embodiments, under the condition of heating and molding the multilayer structure 122a, excess liquid thermoplastic resin matrix 1221b in the sealing edge 122 can overflow and flow into the gap between the stacked portion 1223 and the first wall 1211, and the filler 123 is formed after the thermoplastic resin cools. This simplifies the manufacturing process of the filler 123.

[0167] In some implementations, the first housing 12 is a continuous fiber 1221a composite material structure and is an integrally molded structure, such that a portion of the continuous fiber 1221a in the first housing 12 is located in the body 121 and another portion is located in the edge sealing 122.

[0168] In other words, the edge banding 122 and the body 121 are different parts of the same component.

[0169] In this way, on the one hand, it is beneficial to simplify the manufacturing process of the first housing 12; on the other hand, it is beneficial to improve the overall structural strength of the first housing 12.

[0170] In some embodiments, see Figure 5 The thickness of the edge banding 122 is the same as the thickness of the body 121, that is, the thickness of the edge banding 122 is L2 and the thickness of the body 121 is L3, L2 = L3.

[0171] This facilitates the formation of the edge banding 122 and the body 121 using composite material plates 30 of uniform thickness and size, thereby simplifying the manufacturing process and improving production efficiency.

[0172] The thickness of the composite material plate 30 ranges from 1 mm to 5 mm. Specific thicknesses of the composite plate can be 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc.

[0173] In some embodiments, see Figure 10 The battery device 100 also includes a fastener 13. The multi-layer structure 122a is provided with a mounting hole 122b that extends through in the first direction. The fastener 13 passes through the mounting hole 122b and is connected to other sub-boxes 11 to fix the first box 12 and other sub-boxes 11.

[0174] Thus, the better structural strength of the multi-layer structure 122a allows the fastener 13 to apply a greater tightening force between the first housing 12 and other sub-housing 11, which is beneficial for a firmer connection between the first housing 12 and other sub-housing 11 and also helps to improve the sealing performance.

[0175] The specific form of fastener 13 is not limited, such as screws, bolts, etc.

[0176] The specific number of the first box 12 is not limited; it can be one, multiple, or all of the sub-boxes 11 can be the first box 12.

[0177] The battery device 100 in a specific embodiment of this application is described as follows:

[0178] The battery device 100 includes a battery cell 20, fasteners 13, and multiple sub-boxes 11. The multiple sub-boxes 11 together enclose a receiving space 11a. The battery cell 20 is located within the receiving space 11a. Each sub-box 11 includes a first box 12, which includes a body 121, an edge seal 122, and a filler 123. The body 121 forms part of the inner wall of the receiving space 11a. The edge seal 122 is located at the edge of the body 121 and is a continuous fiber 1221a composite material structure that is at least partially bent and extended to form a multi-layer structure 122a stacked along a first direction. The multi-layer structure 122a is sealed and fitted with the other sub-boxes 11 along the first direction. The edge seal 122 includes multiple layers of continuous fiber composite material 1221. Each layer of continuous fiber composite material 1221 includes continuous fibers 1221a and a thermoplastic resin matrix 1221b, with the thermoplastic resin matrix 1221b connected to the continuous fibers 1221a. The edge includes a sealing portion 1222 and a stacking portion 1223. The sealing portion 1222 is connected to the body 121. One side of the sealing portion 1222 along a first direction seals against other sub-boxes 11 along the first direction. At least a portion of the stacking portion 1223 is located on the other side of the sealing portion 1222 and together with the sealing portion 1222, forms a multi-layer structure 122a. A portion of the continuous fibers 1221a in the sealing edge 122 is located in the sealing portion 1222, and another portion is located in the stacking portion 1223. The stacking portion 1223 further includes a first curved portion 1223a and a stacked sub-portion 1223b. The first curved portion 1223a is located at the end of the sealing portion 1222 away from the main body 121. The first curved portion 1223a bends and extends toward the sealing portion 1222 along a first direction away from the other sub-boxes 11 and connects the stacked sub-portion 1223b with the sealing portion 1222. The stacked sub-portion 1223b connected to the first curved portion 1223a fits against the sealing portion 1222 along the first direction. The stacked sub-portion 1223b and the sealing portion 1222 together form a multi-layer structure 122a. The main body 121 includes a first wall 1211, which extends along the first direction and forms part of the inner wall of the receiving space 11a. One end of the first wall 1211 along the first direction is connected to the sealing portion 1222. The stacking portion 1223 is spaced apart from the first wall 1211. The filler 123 fills the gap between the stacked portion 1223 and the first wall 1211, connecting the first wall 1211, the stacked portion 1223, and the sealing portion 1222. The filler 123 is connected to the thermoplastic resin matrix 1221b, and the material of the filler 123 is the same as that of the thermoplastic resin matrix 1221b. The first housing 12 is a continuous fiber 1221a composite material structure and is an integrally molded structure, such that a portion of the continuous fiber 1221a in the first housing 12 is located in the body 121 and another portion is located in the edge sealing 122. The thickness of the body 121 is the same as the thickness of the edge sealing 122.The multi-layer structure 122a is provided with a mounting hole 122b that runs through the first direction. Fasteners 13 are inserted into the mounting hole 122b and connected to other sub-boxes 11 to fix the first box 12 to other sub-boxes 11.

[0179] The manufacturing method of the first housing 12 in a specific embodiment of this application includes:

[0180] See Figure 11 S10: After heating the composite material plate 30, place it in the molding space between the first mold 40 and the second mold 50.

[0181] The composite material plate 30 includes multiple layers of continuous fiber composite material 1221. Each continuous fiber composite material layer 1221 includes continuous fibers 1221a and a thermoplastic resin matrix 1221b, with the thermoplastic resin matrix 1221b connected to the continuous fibers 1221a. Heating softens the thermoplastic resin matrix 1221b after heating the composite material plate 30, facilitating the compression molding of the composite material plate 30 in subsequent steps.

[0182] The composite material plate 30 includes a body forming area 31 and an edge sealing forming area 32.

[0183] See Figure 12 and Figure 13 S20: Drive the first mold 40 and the second mold 50 closer to each other until the first relative position, so that a portion of the body forming region 31 of the composite material plate 30 is pressed to form the body 121, and at least one of the first mold 40 and the second mold 50 is spaced apart from the edge sealing forming region 32.

[0184] S30: Drive the first mold 40 away from the second mold 50 so that the composite material plate 30 is located in the second mold 50 and the second mold 50 is kept at the first heating temperature.

[0185] This is to reduce the risk that the composite material plate 30 will become unusable for subsequent processing and forming due to cooling hardening before the next step.

[0186] The specific range of the first heating temperature is 140°C to 180°C, in order to improve the processability of the composite material plate 30.

[0187] The specific value of the first heating temperature can be 140℃, 145℃, 150℃, 155℃, 160℃, 165℃, 170℃, 175℃, or 180℃.

[0188] See Figure 14 S40: Bend a portion of the edge-sealing forming area 32 away from the body 121 toward the other side away from the second mold 50, so that the two fit together.

[0189] The specific method of bending the edge banding 122 is not limited. For example, the second mold 50 is provided with a flipping member 51, a part of which can rotate relative to the second mold 50. In steps S10 to S30, the flipping member 51 and the second mold 50 together support the composite material plate 30. In step S40, the flipping member 51 rotates to bend the part of the composite material plate 30 that is in contact with the flipping member 51.

[0190] See Figure 15 S50: Drive the first mold 40 and the second mold 50 closer to each other until the first relative position, so that the first mold 40 extrudes the sealing forming area 32 to form the sealing part 1222, the first bending part 1223a and the stacking part 1223.

[0191] It is understandable that during the extrusion and sealing process of the edge sealing area 32, the edge sealing area 32 needs to be heated to the first heating temperature so that the edge sealing area 32 can be extruded and formed.

[0192] During the extrusion process, the two parts of the edge-sealing forming area 32 that are in contact with each other are in a molten state. The thermoplastic resins that are molten with each other fuse together, and after cooling, they can be bonded and fixed.

[0193] During the extrusion sealing forming area 32, excess molten thermoplastic resin in the sealing forming area 32 can flow into the gap between the stacked portion 1223 and the body 121 to form a filler 123.

[0194] This application embodiment also provides an electrical device, which includes any of the battery devices 100 in the foregoing embodiments, and the battery devices 100 are used as the power source for the electrical device.

[0195] This is beneficial for improving the sealing and structural strength of the battery device 100 itself, and thus for extending the service life of the battery device 100 and the electrical device.

[0196] This application embodiment also provides a housing assembly 10 for accommodating battery cells 20, see reference. Figures 3 to 5 The housing assembly 10 includes multiple sub-housing units 11, which together enclose a receiving space 11a for accommodating individual battery cells 20. Each sub-housing unit 11 includes a first housing 12, which includes a body 121 and a sealing edge 122. The body 121 forms part of the inner wall of the receiving space 11a. The sealing edge 122 is located at the edge of the body 121 and is sealed to the other sub-housing units 11 along a first direction. The sealing edge 122 is a continuous fiber composite material structure 1221a. The sealing edge 122 is an integrally formed structure and is curved and extended so that at least a portion of the sealing edge 122 is stacked along the first direction to form a multilayer structure 122a.

[0197] This increases the dimensions of the sealing fit between the first housing 12 and other sub-housing units 11 along the first direction, thereby improving structural strength and enhancing the sealing effect with other sub-housing units 11, thus improving the sealing performance of the housing assembly 10. It also facilitates the formation of a multi-layer structure 122a by bending the sealing edge 122 during the manufacturing process, thereby maintaining the continuity of fibers between different layers in the multi-layer structure 122a. Furthermore, it simplifies the manufacturing process of the multi-layer structure 122a, reduces production costs, improves production efficiency, and further enhances the overall sealing performance of the housing assembly 10.

[0198] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0199] The above are merely preferred embodiments of this application and are not intended to limit the embodiments in this application. For those skilled in the art, the embodiments of this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A battery device, characterized in that, The battery device includes: Battery cell; Multiple sub-boxes are arranged together to form a receiving space. The battery cell is located within the receiving space. Each sub-box includes a first box, which includes a body and a sealing edge. The body forms part of the inner wall of the receiving space. The sealing edge is located at the edge of the body and is a continuous fiber composite material structure that is at least partially bent and extended to form a multi-layer structure stacked along a first direction. The multi-layer structure is sealed and fitted with the other sub-boxes along the first direction.

2. The battery device according to claim 1, characterized in that, The edge sealing includes multiple layers of continuous fiber composite material, each layer of which includes continuous fibers and a thermoplastic resin matrix, wherein the thermoplastic resin matrix is ​​connected to the continuous fibers.

3. The battery device according to claim 1, characterized in that, The edge sealing includes a sealing part and a stacking part. The sealing part is connected to the body. One side of the sealing part along the first direction seals with other sub-boxes along the first direction. At least a portion of the stacking part is located on the other side of the sealing part and together with the sealing part forms the multi-layer structure.

4. The battery device according to claim 3, characterized in that, A portion of the continuous fibers in the edge sealing is located in the sealing portion, and another portion is located in the overlapping portion.

5. The battery device according to claim 3, characterized in that, The stacked portion further includes a first curved portion and a stacked sub-portion. The first curved portion is located at the end of the sealing portion away from the main body. The first curved portion bends and extends toward the sealing portion along a first direction away from the other sub-boxes and connects the stacked sub-portion with the sealing portion. The stacked sub-portion connected to the first curved portion fits against the sealing portion along the first direction. The stacked sub-portion and the sealing portion together form the multi-layer structure.

6. The battery device according to claim 5, characterized in that, The number of stacked sub-parts is multiple, and the multiple stacked sub-parts are stacked along the first direction. The stacked part also includes a second curved part, which bends and extends away from the sealing part and connects two adjacent stacked sub-parts along the first direction.

7. The battery device according to claim 3, characterized in that, The edge sealing is wound to form a wound body, the axis of the wound body is perpendicular to the first direction, and the outermost layer of the wound body forms the sealing part on a portion of the side of the other sub-boxes along the first direction.

8. The battery device according to claim 3, characterized in that, The body includes a first wall that extends along the first direction and forms part of the inner wall of the receiving space. One end of the first wall along the first direction is connected to the sealing portion, and the stacked portion is spaced apart from the first wall.

9. The battery device according to claim 8, characterized in that, The first housing also includes a filler that fills the gap between the stacked portion and the first wall and connects the first wall, the stacked portion and the sealing portion.

10. The battery device according to claim 9, characterized in that, The edge sealing includes a thermoplastic resin matrix, and the filler is connected to the thermoplastic resin matrix. The filler is made of the same material as the thermoplastic resin matrix.

11. The battery device according to claim 1, characterized in that, The first box body is a continuous fiber composite material structure and is a one-piece molded structure, such that a portion of the continuous fiber in the first box body is located in the body and another portion is located in the sealing edge.

12. The battery device according to claim 11, characterized in that, The thickness of the body is the same as the thickness of the edge banding.

13. The battery device according to claim 1, characterized in that, The battery device also includes fasteners. The multi-layer structure has mounting holes that extend through the first direction. The fasteners are inserted into the mounting holes and connected to other sub-boxes to fix the first box to the other sub-boxes.

14. An electrical appliance, characterized in that, The electrical device includes a battery device according to any one of claims 1 to 13, the battery device being used as a power source for the electrical device.

15. A housing assembly for housing individual battery cells, characterized in that, The housing assembly includes multiple sub-housing units, which together enclose a receiving space for accommodating the battery cell. Each sub-housing unit includes a first housing unit, which includes a body and a sealing edge. The body forms part of the inner wall of the receiving space. The sealing edge is located at the edge of the body and seals against other sub-housing units along a first direction. The sealing edge is a continuous fiber composite material structure and is an integrally formed structure that is bent and extended so that at least a portion of the sealing edge is stacked along the first direction to form a multi-layer structure.

16. The housing assembly according to claim 15, characterized in that, The edge sealing includes a sealing part and a stacking part. The sealing part is sealed and engaged with other sub-boxes along the first direction. The sealing part is connected to the main body. The stacking part is located on the side of the sealing part away from the other sub-boxes along the first direction. The stacking part and the sealing part together form the multi-layer structure.

17. The housing assembly according to claim 16, characterized in that, A portion of the continuous fibers in the edge sealing is located in the sealing portion, and another portion is located in the overlapping portion.

18. The housing assembly according to claim 16, characterized in that, The stacked portion further includes a first curved portion and a stacked sub-portion. One end of the first curved portion is connected to the sealing portion. The first curved portion bends and extends toward the sealing portion along a first direction away from the other sub-boxes and is connected to the stacked sub-portion. The stacked sub-portion connected to the first curved portion fits against the sealing portion along the first direction.

19. The housing assembly according to claim 16, characterized in that, The body includes a first wall that extends along the first direction and forms part of the inner wall of the receiving space. One end of the first wall along the first direction is connected to the sealing portion, and the stacked portion is spaced apart from the first wall.

20. The housing assembly according to claim 19, characterized in that, The first housing also includes a filler that fills the gap between the stacked portion and the first wall and connects the first wall, the stacked portion and the sealing portion.

21. The housing assembly according to claim 20, characterized in that, The edge sealing includes a thermoplastic resin matrix, and the filler is connected to the thermoplastic resin matrix. The filler is made of the same material as the thermoplastic resin matrix.

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