Battery device and electric device

Abstract

The application relates to the battery technical field and provides a battery device and a power utilization device. A bottom plate of the battery device is connected to one end of a frame and encloses a containing space. A first beam body is arranged in the containing space. Opposite ends of the first beam body are connected to the frame. The first beam body is connected to the bottom plate through a first fastener. The first beam body divides the containing space to form a containing cavity. A battery monomer is contained in the containing cavity. The battery monomer is connected to the bottom plate. A glue layer is further arranged between the first beam body and the bottom plate. The first beam body is bonded to the bottom plate through the glue layer. At least part of the glue layer is located on a side of the first fastener close to the containing cavity. The battery device can utilize the glue layer to increase the connecting area between the first beam body and the bottom plate. The stress concentrated around the first fastener can be shared by the glue layer. The stress formed by the bottom plate supporting the battery monomer can be evenly shared on the whole glue layer.

Description

Technical Field

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

[0002] Battery devices are widely used in vehicles to provide electric power. In order to meet the high power requirements of vehicles, battery devices are generally used as the power source for vehicles; battery devices are generally mounted on vehicles by means of mounting.

[0003] In related technologies, a battery device includes a housing and individual battery cells housed within the housing; the housing includes a base plate and multiple beams connecting the base plate; the battery device can be mounted on the beams of the housing. However, under long-term vibration conditions, stress concentration can easily occur at the connection between the beams near the individual battery cells and the base plate, leading to excessive stress and causing localized damage. Utility Model Content

[0004] The purpose of this application is to provide a battery device and an electrical device that aims to solve the problem that stress concentration easily forms at the connection between the beam and the bottom plate of the housing, leading to local damage.

[0005] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0006] In a first aspect, embodiments of this application provide a battery device, including a battery cell and a housing. The housing includes a base plate, a frame, and a first beam. The base plate is connected to one end of the frame and encloses a receiving space. The first beam is disposed within the receiving space, and its opposite ends are connected to the frame. The first beam is connected to the base plate via a first fastener. The first beam divides the receiving space to form a receiving cavity, in which the battery cell is housed and connected to the base plate. An adhesive layer is also provided between the first beam and the base plate, and the first beam is bonded to the base plate via the adhesive layer. At least a portion of the adhesive layer is located on the side of the first fastener near the receiving cavity.

[0007] The beneficial effects of the embodiments of this application are as follows: The battery device provided in this application embodiment has a first beam that divides the accommodating space to form an accommodating cavity for accommodating a single battery cell, and the first beam is connected to the base plate by a first fastener; at the same time, an adhesive layer is provided between the first beam and the base plate, and the adhesive layer is located on the side of the first fastener near the accommodating cavity. In this way, the adhesive layer can increase the connection area between the first beam and the base plate, and the adhesive layer can distribute the stress concentrated around the first fastener, so that the stress formed by the base plate supporting the single battery cell can be evenly distributed on the entire adhesive layer; thereby, the probability of stress concentration on the first fastener can be effectively reduced, and the probability of local damage to the housing can be reduced.

[0008] In some embodiments, at least a portion of the adhesive layer is located at the middle of the first beam along its length.

[0009] By adopting the above technical solution, the middle part of the first beam is far from the end connection frame along the length direction, so the stress formed on the first fastener of the first beam is greater. By setting an adhesive layer in the middle of the first beam, the stress formed on the first fastener can be reduced, thereby further reducing the probability of local damage to the box.

[0010] In some embodiments, there are multiple first fasteners; the multiple first fasteners are arranged sequentially along the length direction of the first beam, and the adhesive layer is arranged along the length direction of the first beam and located on the side of the multiple first fasteners near the receiving cavity.

[0011] By adopting the above technical solution, multiple first fasteners are arranged sequentially along the length of the first beam to fix the first beam and the base plate. At the same time, an adhesive layer is set on the side of the multiple first fasteners that form a row near the receiving cavity to reduce stress concentration in the first fasteners.

[0012] In some embodiments, the width of the side end face of the first beam facing the bottom plate is d in the direction perpendicular to the length of the first beam, and the width of the adhesive layer is h; wherein, 0.05d≤h≤0.8d.

[0013] By adopting the above technical solution, in the direction perpendicular to the length of the first beam, the width h of the adhesive layer is limited to 5% greater than or equal to the width d of the side end face of the first beam facing the bottom plate and less than or equal to 80% of the width d of the side end face of the first beam facing the bottom plate. This ensures that the adhesive layer has sufficient width to connect the first beam and the bottom plate and distribute the stress concentrated on the first fastener. At the same time, it can also reduce the probability that the adhesive layer is too wide and thus affects the locking effect of the first fastener.

[0014] In some embodiments, the housing further includes a second fastener, and the first beam is also connected to the base plate by the second fastener; the second fastener is disposed on at least one side of the adhesive layer along the length direction of the first beam.

[0015] By adopting the above technical solution, a second fastener is provided on at least one side of the adhesive layer along the length direction of the first beam, thereby improving the connection strength between the base plate and the first beam.

[0016] In some embodiments, a first wall is provided inside the first beam, and the interior of the first beam is divided by the first wall to form a first cavity and a second cavity, with the second cavity located on the side of the first cavity near the receiving cavity; a first fastener passes through the base plate and the first beam and extends into the first cavity.

[0017] By adopting the above technical solution, the first wall inside the first beam divides the interior of the first beam into a first cavity and a second cavity. When the first fastener is fastened to the base plate and the first beam, it can avoid the first cavity. The first wall can also serve as a reinforcing structure for the first beam to improve the connection and support strength of the first beam to the base plate.

[0018] In some embodiments, an adhesive layer is provided between two adjacent first fasteners; and / or, an adhesive layer is provided on the side of the first fastener away from the first beam.

[0019] By adopting the above technical solution, in addition to setting an adhesive layer on the side of the first fastener close to the battery cell, an adhesive layer can also be set between two adjacent first fasteners and / or on the side of the first fastener away from the first beam, so as to further increase the connection area formed by the first beam and the base plate through the adhesive layer, thereby further reducing the stress on the first fastener.

[0020] In some embodiments, the first beam has an exposed surface facing the base plate and exposed to the first fastener, and the exposed surface is bonded to the base plate by an adhesive layer.

[0021] By adopting the above technical solution, the exposed surfaces of the first beam are bonded to the base plate through an adhesive layer, thereby effectively increasing the connection area formed by the adhesive layer between the first beam and the base plate, and further reducing the stress on the first fastener.

[0022] In some embodiments, a positioning groove is formed between the first beam and the base plate, and at least a portion of the adhesive layer is accommodated within the positioning groove.

[0023] By adopting the above technical solution, a positioning groove is formed between the first beam and the bottom plate to accommodate the adhesive layer, thereby improving the accuracy of the adhesive layer's position and reducing the probability of adhesive overflow.

[0024] In some embodiments, the base plate is recessed opposite to the first beam to form a positioning groove.

[0025] By adopting the above technical solution, the positioning groove formed by the recess on the base plate is used to accommodate the adhesive layer, thereby improving the accuracy of the adhesive layer position and reducing the probability of adhesive overflow.

[0026] In some embodiments, a clearance groove is provided on the side of the first beam facing the bottom plate, and the positioning groove and the clearance groove are staggered along the length direction of the first beam.

[0027] By adopting the above technical solution, when the first beam body is provided with a clearance groove, the positioning groove and the clearance groove can be staggered along the length direction of the first beam body, thereby reducing the probability of mutual influence between the positioning groove and the clearance groove.

[0028] In some embodiments, the distance between the end of the positioning groove and the end of the clearance groove along the length of the first beam is m, where m ≥ 1 mm.

[0029] By adopting the above technical solution, the distance m between the groove end of the positioning groove and the groove end of the clearance groove is limited to greater than or equal to 1mm, so that there is a sufficient gap between the groove end of the positioning groove and the groove end of the clearance groove, thereby further reducing the probability of mutual influence between the positioning groove and the clearance groove.

[0030] In some embodiments, the battery device further includes a bottom protective plate disposed on the outer side of the bottom plate; a support member is also disposed between the bottom plate and the bottom protective plate, and the support member is connected to the bottom plate and the bottom protective plate.

[0031] By adopting the above technical solution, the support member connects the base plate and the bottom guard plate simultaneously. The support member can strengthen the connection of the base plate, thereby limiting the vibration of the base plate under vibration conditions and effectively reducing the stress formed on the first fastener.

[0032] In some embodiments, the support includes foam, with opposite ends of the foam bonded to the base plate and the bottom guard plate, respectively.

[0033] By adopting the above technical solution, when the base plate tends to move away from the adhesive layer, the foam can provide a supporting effect on the base plate. When the base plate tends to move towards the adhesive layer and squeeze the adhesive layer, the foam can apply tension to the base plate. This can limit the vibration of the base plate and thus alleviate the stress formed on the first fastener.

[0034] In some embodiments, a buffer protection component is also provided between the base plate and the bottom protective plate. The buffer protection component is integrally formed with the support component, and the buffer protection component and the support component are connected to the base plate and the bottom protective plate.

[0035] By adopting the above technical solution, the buffer protection component is used to be set between the base plate and the bottom guard plate to form a buffer protection function. By setting the buffer protection component and the support component as an integral molding, the number of parts can be reduced and the assembly efficiency can be improved.

[0036] Secondly, embodiments of this application also provide an electrical device, including the battery device as described above, which is used to provide electrical energy.

[0037] The beneficial effects of the embodiments of this application are as follows: The electrical device provided in the embodiments of this application includes the above-mentioned battery device. When the battery device is mounted and used, it is not easy for local damage to occur, and the reliability of the electrical device is better. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0040] Figure 2 An exploded view of the battery device provided in the embodiments of this application;

[0041] Figure 3 This is an exploded structural diagram of a battery cell provided in an embodiment of this application;

[0042] Figure 4 A top view of the battery device provided in the embodiments of this application;

[0043] Figure 5 for Figure 4 Sectional view at point AA;

[0044] Figure 6 for Figure 5 A magnified view of part B;

[0045] Figure 7 This is an exploded structural diagram of the box provided in an embodiment of this application;

[0046] Figure 8 for Figure 7 A magnified view of a portion at point C;

[0047] Figure 9 for Figure 7 A magnified view of a portion at point D;

[0048] Figure 10 This is a schematic diagram showing the distribution structure of the clearance groove of the first beam and the positioning groove of the bottom plate provided in the embodiments of this application.

[0049] The following are the labeling elements in the figure:

[0050] 1000, vehicles;

[0051] 100. Battery assembly; 200. Controller; 300. Motor;

[0052] 10. Box body; 101. Accommodation space; 102. Receiving cavity; 11. First box body; 12. Second box body; 110. Base plate; 111. Positioning groove; 120. Frame; 130. First beam; 131. First wall; 131a. First cavity; 131b. Second cavity; 132. Circumvention groove; 140. First fastener; 150. Adhesive layer; 160. Second fastener;

[0053] 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab;

[0054] 30. Bottom guard plate; 40. Supporting components; 50. Buffer and protective components;

[0055] L represents the length direction of the first beam. Detailed Implementation

[0056] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0057] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0059] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0061] Battery units are typically mounted on vehicles via a mounting system. In related technologies, a battery unit includes a housing and individual battery cells housed within it; the housing comprises a base plate and multiple beams connecting to the base plate, allowing the battery unit to be mounted on these beams. However, under prolonged vibration conditions, stress concentration can easily occur at the connection points between the beams near the individual battery cells and the base plate, leading to excessive stress and localized damage.

[0062] Based on the above considerations, in order to solve the problem of stress concentration at the connection between the beam and the base plate of the housing, which can easily lead to local damage, a battery device is designed. The first beam is connected to the base plate by a first fastener, and the first beam is used to divide the accommodating space into a cavity to accommodate individual battery cells. By setting an adhesive layer between the first beam and the base plate, and placing at least a portion of the adhesive layer on the side of the first fastener closer to the cavity, the connection area between the first beam and the base plate can be increased. Furthermore, the adhesive layer can distribute the stress concentrated around the first fastener, allowing the stress generated by the base plate supporting the battery cells to be evenly distributed across the entire adhesive layer. This effectively reduces the probability of stress concentration at the first fastener, thereby reducing the probability of local damage to the housing.

[0063] The battery cells disclosed in this application can be used in electrical devices that use battery devices as a power source or in various energy storage systems that use battery devices as energy storage elements. Electrical devices can be, but are 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.

[0064] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0065] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and 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.

[0066] 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.

[0067] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0068] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0069] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0070] In some embodiments, the battery device may be a battery pack, which includes a housing 10 and one or more battery cell assemblies housed in the housing 10.

[0071] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 10 by fixing the battery module in the housing 10.

[0072] As an example, the battery cell assembly can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0073] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0074] As an example, the housing 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 10 forms an enclosed space to accommodate the battery cell assembly.

[0075] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0076] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0077] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after the battery cell has been discharged by recharging to activate the active materials.

[0078] The battery cell 20 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.

[0079] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit constituting the battery device 100. For example... Figure 3The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0080] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, allowing battery cell 20 to have higher structural strength and improved reliability. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0081] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The housing 22 can be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0082] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0083] According to some embodiments of this application, refer to Figures 4 to 7 This application provides a battery device 100, including a battery cell 20 and a housing 10. The housing 10 includes a base plate 110, a frame 120, and a first beam 130. The base plate 110 is connected to one end of the frame 120 and encloses a receiving space 101. The first beam 130 is disposed within the receiving space 101, and its opposite ends are connected to the frame 120. The first beam 130 is connected to the base plate 110 by a first fastener 140. The first beam 130 divides the receiving space 101 to form a receiving cavity 102, in which the battery cell 20 is housed. The battery cell 20 is connected to the base plate 110. An adhesive layer 150 is also provided between the first beam 130 and the base plate 110. The first beam 130 is bonded to the base plate 110 by the adhesive layer 150, and at least a portion of the adhesive layer 150 is located on the side of the first fastener 140 near the receiving cavity 102.

[0084] The housing 10 includes a base plate 110 and a frame 120. The frame 120 can be a structure formed by connecting multiple beams end to end, such as, but not limited to, a triangular frame, a rectangular frame, or other polygonal frames. Thus, the connection between the base plate 110 and one end of the frame 120 can enclose and form an accommodating space 101. In some embodiments, the frame 120 is also provided with a mounting connection part (e.g., a connecting block with threaded holes); thus, the battery device 100 can be mounted and used via the mounting connection part.

[0085] Optionally, the base plate 110 and the frame 120 can be fixedly connected by fasteners (such as bolts, rivet nuts, etc.) or by welding.

[0086] The box body 10 also includes a first beam 130; the first beam 130 is disposed within the accommodating space 101. Optionally, the first beam 130 may be, but is not limited to, a profile beam, a roll-formed beam, etc.

[0087] The two opposite ends of the first beam 130 are connected to the frame 120; that is, the two ends of the first beam 130 along its own length direction are fixedly connected to the frame 120. For example, the two opposite ends of the first beam 130 can be connected to the frame 120 by welding, bracket connection, connector connection, etc.

[0088] The first beam 130 is connected to the base plate 110 by a first fastener 140; optionally, the first fastener 140 may be, but is not limited to, bolts, rivet nuts, or other fastening structures. The number of first fasteners 140 may be any number. The first beam 130 and the base plate 110 are locked and fixed by multiple first fasteners 140.

[0089] By connecting the opposite ends of the first beam 130 to the frame 120 and connecting the first beam 130 to the base plate 110, the first beam 130 divides the accommodating space 101 to form an accommodating cavity 102. In this way, the battery cell 20 can be accommodated in the accommodating cavity 102, and the battery cell 20 is connected to the base plate 110 for fixation.

[0090] An adhesive layer 150 is also provided between the first beam 130 and the base plate 110. The adhesive layer 150 can be a structural adhesive, such as epoxy resin structural adhesive, polyurethane structural adhesive, acrylic structural adhesive, silicone structural adhesive, etc. The adhesive layer 150 is used to bond and fix the first beam 130 and the base plate 110 together, so that the first beam 130 and the base plate 110 are simultaneously connected by the first fastener 140 and the adhesive layer 150, thus effectively increasing the connection area between the first beam 130 and the base plate 110.

[0091] At least a portion of the adhesive layer 150 is located on the side of the first fastener 140 near the receiving cavity 102; alternatively, the entire adhesive layer 150 may be disposed on the side of the first fastener 140 near the receiving cavity 102; or, a portion of the adhesive layer 150 may be disposed on the side of the first fastener 140 near the receiving cavity 102, while the other portion of the adhesive layer 150 may be disposed in other locations, such as on the side of the first fastener 140 away from the receiving cavity 102, or on at least one side of the first fastener 140 along the length direction of the first beam 130.

[0092] The battery device 100 provided in this application embodiment has a first beam 130 dividing the accommodating space 101 to form an accommodating cavity 102 for accommodating the battery cell 20, and the first beam 130 is connected to the base plate 110 by a first fastener 140; at the same time, an adhesive layer 150 is provided between the first beam 130 and the base plate 110, and the adhesive layer 150 is located on the side of the first fastener 140 near the accommodating cavity 102. In this way, the adhesive layer 150 can increase the connection area between the first beam 130 and the base plate 110, and the adhesive layer 150 can distribute the stress concentrated around the first fastener 140, so that the stress formed by the base plate 110 supporting the battery cell 20 can be evenly distributed on the entire adhesive layer 150; thereby, the probability of stress concentration on the first fastener 140 can be effectively reduced, and the probability of local damage to the housing 10 can be reduced.

[0093] Please refer to Figures 6 to 8 In some embodiments, at least a portion of the adhesive layer 150 is located at the middle of the first beam 130 along the length direction L of the first beam 130.

[0094] At least a portion of the adhesive layer 150 is located at the center of the first beam 130, meaning that at least a portion of the adhesive layer 150 is located at the center of the first beam 130 along the length direction L. Optionally, other portions of the adhesive layer 150 may also be located at any other location along the length direction L of the first beam 130.

[0095] For example, in some embodiments, there may be multiple adhesive layers 150, one of which may be located at the center of the first beam 130 along the length direction L, and the other multiple adhesive layers 150 may be symmetrically distributed at opposite ends of the first beam 130 along the length direction L. In this way, multiple adhesive layers 150 are used to bond the first beam 130 and the base plate 110, thereby improving the connection strength between the first beam 130 and the base plate 110 and relieving the stress generated on the first fastener 140.

[0096] It should be understood that the two opposite ends of the first beam 130 along the length direction L are connected to the frame 120, and the base plate 110 is also connected to the frame 120; thus, the stress generated on the first fastener 140 at the two opposite ends of the first beam 130 along the length direction L and connected to the base plate 110 is relatively small; while the middle part of the first beam 130 along the length direction L is far from the end connection to the frame 120, so the stress generated on the first fastener 140 located in the middle part of the first beam 130 is relatively large.

[0097] By setting at least a portion of the adhesive layer 150 at the middle of the first beam 130 along the length direction L, stress concentration on the first fastener 140 located at the middle of the first beam 130 along the length direction L can be effectively relieved, thereby effectively reducing the probability of local damage to the housing 10.

[0098] Please refer to Figures 6 to 9 In some embodiments, there are multiple first fasteners 140; the multiple first fasteners 140 are arranged sequentially along the length direction L of the first beam 130, and the adhesive layer 150 is arranged along the length direction L of the first beam 130 and located on the side of the multiple first fasteners 140 near the receiving cavity 102.

[0099] In this embodiment, multiple first fasteners 140 are arranged sequentially along the length direction L of the first beam 130 to lock the first beam 130 and the base plate 110 together. The multiple first fasteners 140 can effectively improve the connection strength between the first beam 130 and the base plate 110, thereby improving the overall structural strength of the box 10. At the same time, the multiple first fasteners 140 can also share the stress.

[0100] The adhesive layer 150 is arranged along the length direction L of the first beam 130; optionally, the adhesive layer 150 can be configured as a strip structure, with the length of the strip structure 150 arranged in the length direction L of the first beam 130; or, the adhesive layer 150 can also be configured as a block structure, such as a rectangular block structure, a circular block structure, etc., with the block structure 150 arranged in the length direction L of the first beam 130.

[0101] The number of adhesive layers 150 can be one, two or more; when there are multiple adhesive layers 150, the multiple adhesive layers 150 can be arranged sequentially at intervals along the length direction L of the first beam 130.

[0102] Exemplarily, in some embodiments, the number of adhesive layers 150 can be three, including one short adhesive layer 150 and two elongated adhesive layers 150; the shorter adhesive layer 150 can be disposed in the middle of the first beam 130 along the length direction L, and the two elongated adhesive layers 150 can be symmetrically spaced on opposite sides of the shorter adhesive layer 150 along the length direction L of the first beam 130; simultaneously, all three adhesive layers 150 are located on the side of the plurality of first fasteners 140 arranged along the length direction L of the first beam 130 facing the receiving cavity 102; as Figure 8 and Figure 9 As shown.

[0103] With this configuration, multiple first fasteners 140 are arranged sequentially along the length direction L of the first beam 130 to fix the first beam 130 and the base plate 110. At the same time, an adhesive layer 150 is provided on the side of the multiple first fasteners 140 that form a row near the receiving cavity 102 to reduce stress concentration in the first fasteners 140.

[0104] Please refer to Figure 6 In some embodiments, the width of the end face of the first beam 130 facing the bottom plate 110 is d, and the width of the adhesive layer 150 is h, in the direction perpendicular to the length direction L of the first beam 130; wherein, 0.05d≤h≤0.8d.

[0105] The width d of the side end face of the first beam 130 facing the base plate 110 refers to the side end face of the first beam 130 that forms contact with the base plate 110, and the dimension of this end face in the direction perpendicular to the length direction L of the first beam 130.

[0106] The width h of the adhesive layer 150 refers to the dimension of the adhesive layer 150 in the direction perpendicular to the length direction L of the first beam 130.

[0107] In this embodiment, the width h of the adhesive layer 150 is limited to being greater than or equal to 5% of the width d of the side end face of the first beam 130 facing the base plate 110, and the width h of the adhesive layer 150 is less than or equal to 80% of the width d of the side end face of the first beam 130 facing the base plate 110. Exemplarily, the width h of the adhesive layer 150 may be, but is not limited to, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, etc., of the width d of the side end face of the first beam 130 facing the base plate 110.

[0108] This configuration ensures that the adhesive layer 150 has sufficient width to connect the first beam 130 and the base plate 110 and to distribute the concentrated stress on the first fastener 140. It also reduces the probability that the adhesive layer 150 is too wide and thus affects the locking effect of the first fastener 140.

[0109] Please refer to Figures 7 to 9 In some embodiments, the housing 10 further includes a second fastener 160, and the first beam 130 is also connected to the base plate 110 by the second fastener 160; the second fastener 160 is disposed on at least one side of the adhesive layer 150 along the length direction L of the first beam 130.

[0110] Optionally, the second fastener 160 may be, but is not limited to, a bolt, rivet nut, or other fastening structure; the second fastener 160 is used to lock the first beam 130 and the base plate 110 together.

[0111] Along the length direction L of the first beam 130, a second fastener 160 is disposed on at least one side of the adhesive layer 150; optionally, the second fastener 160 may be disposed on either side of the adhesive layer 150; or, the second fastener 160 may be disposed on both opposite sides of the adhesive layer 150. The adhesive layer 150 may, but is not limited to, be a strip structure, a rectangular structure, a circular structure, etc.; taking a strip structure as an example, the strip-shaped adhesive layer 150 is arranged towards the length direction L of the first beam 130, and the second fastener 160 may be disposed on opposite ends of the strip-shaped adhesive layer 150 along its own length direction.

[0112] Exemplarily, in some embodiments, a plurality of first fasteners 140 are arranged sequentially along the length direction L of the first beam 130 and are used to lock the first beam 130 and the base plate 110; there are a plurality of adhesive layers 150, which are disposed on the side of the plurality of first fasteners 140 arranged in a row facing the receiving cavity 102, and the plurality of adhesive layers 150 are arranged sequentially at intervals along the length direction L of the first beam 130; at the same time, a second fastener 160 is also provided between the plurality of adhesive layers 150, and / or, a second fastener 160 is provided outside the outermost adhesive layer 150 along the length direction L of the first beam 130; the first beam 130 and the base plate 110 are locked simultaneously by the second fastener 160.

[0113] With this configuration, based on the first fastener 140 connecting the first beam 130 and the base plate 110, after the adhesive layer 150 is set to relieve the stress concentration of the first fastener 140, the second fastener 160 is used to simultaneously lock the first beam 130 and the base plate 110, so as to further improve the connection strength between the base plate 110 and the first beam 130.

[0114] Please refer to Figures 6 to 9 In some embodiments, the interior of the first beam 130 is provided with a first wall 131, and the interior of the first beam 130 is divided by the first wall 131 to form a first cavity 131a and a second cavity 131b. The second cavity 131b is located on the side of the first cavity 131a that is close to the receiving cavity 102. The first fastener 140 passes through the base plate 110 and the first beam 130 and extends into the first cavity 131a.

[0115] The first beam 130 has a first wall 131 inside; wherein, the first wall 131 refers to a partition structure formed inside the first beam 130. The first wall 131 can divide the interior of the first beam 130 into a first cavity 131a and a second cavity 131b. At the same time, the first wall 131 can also serve as a reinforcing rib and be used to improve the structural strength of the first beam 130.

[0116] It should be understood that the first cavity 131a and the second cavity 131b serve as internal cavity structures of the first beam 130, and the first cavity 131a and the second cavity 131b respectively penetrate the first beam 130 along the length direction L of the first beam 130.

[0117] The second cavity 131b is located on the side of the first cavity 131a near the receiving cavity 102. When multiple first fasteners 140 are arranged sequentially along the length direction L of the first beam 130 and lock the first beam 130 and the base plate 110, the first fasteners 140 can pass through the base plate 110 and the first beam 130 in sequence and extend into the first cavity 131a. Multiple first fasteners 140 arranged sequentially along the length direction L of the first beam 130 can all extend into the through first cavity 131a to achieve locking and avoidance.

[0118] With this configuration, the first wall 131 inside the first beam 130 divides the interior of the first beam 130 into a first cavity 131a and a second cavity 131b. When the first fastener 140 is fastened to the base plate 110 and the first beam 130, it can make way through the first cavity 131a. The first wall 131 can also serve as a reinforcing structure for the first beam 130 to improve the connection and support strength of the first beam 130 to the base plate 110.

[0119] For example, in some embodiments, the first beam 130 may include a first part and a second part. The first part may refer to the part that contacts the base plate 110 and includes a first cavity 131a and a second cavity 131b. The second part may refer to another part located on the side of the first part away from the base plate 110. In this way, the width of the first part is wider than the width of the second part in the direction perpendicular to the length direction L of the first beam 130. Thus, when the first beam 130 is connected to the base plate 110 through the adhesive layer 150, the bonding area between the first beam 130 and the base plate 110 can be larger, which can further alleviate the stress concentration on the first fastener 140.

[0120] Please refer to Figure 6 and Figure 7 In some embodiments, an adhesive layer 150 is provided between two adjacent first fasteners 140; and / or, an adhesive layer 150 is provided on the side of the first fastener 140 away from the first beam 130.

[0121] In this embodiment, in addition to providing an adhesive layer 150 on the side of the first fastener 140 near the battery cell 20, an adhesive layer 150 can also be provided between two adjacent first fasteners 140. Exemplarily, in some embodiments, when the distance between the two first fasteners 140 is large, the exposed portion of the first beam 130 between the two first fasteners 140 can also be bonded and fixed to the base plate 110 through the adhesive layer 150; this can further increase the connection area between the base plate 110 and the first beam 130.

[0122] And / or, in addition to providing an adhesive layer 150 on the side of the first fastener 140 near the battery cell 20, an adhesive layer 150 may also be provided on the side of the first fastener 140 away from the first beam 130. Exemplarily, in some embodiments, when the first fastener 140 is fastened to the middle of the first beam 130 in a direction perpendicular to the length direction L, the first beam 130 has exposed surfaces on both opposite sides of the first fastener 140 in the direction perpendicular to the length direction L; thus, the adhesive layer 150 can be simultaneously provided on both opposite sides of the first fastener 140 in the direction perpendicular to the length direction L of the first beam 130.

[0123] With this configuration, in addition to providing an adhesive layer 150 on the side of the first fastener 140 near the battery cell 20, an adhesive layer 150 can also be provided between two adjacent first fasteners 140 and / or on the side of the first fastener 140 away from the first beam 130, so as to further increase the connection area formed by the first beam 130 and the base plate 110 through the adhesive layer 150, thereby further reducing the stress on the first fastener 140.

[0124] Please refer to Figure 6 and Figure 7 In some embodiments, the first beam 130 has an exposed surface facing the base plate 110 and exposed to the first fastener 140, and the exposed surface is bonded to the base plate 110 by an adhesive layer 150.

[0125] Understandably, the exposed surface of the first beam 130 refers to the portion of the side wall of the first beam 130 facing the base plate 110 that is exposed to the first fastener 140 when the first fastener 140 is fastened to the first beam 130.

[0126] With this configuration, the exposed surfaces of the first beam 130 are bonded to the base plate 110 through the adhesive layer 150, thereby effectively increasing the connection area formed by the adhesive layer 150 between the first beam 130 and the base plate 110, and further reducing the stress on the first fastener 140.

[0127] Please refer to Figures 6 to 8In some embodiments, a positioning groove 111 is formed between the first beam 130 and the base plate 110, and at least a portion of the adhesive layer 150 is accommodated in the positioning groove 111.

[0128] A positioning groove 111 is formed between the first beam 130 and the base plate 110; the positioning groove 111 is used for coating and filling the adhesive layer 150. Optionally, the positioning groove 111 may be formed by the first beam 130 being recessed inward; or, the positioning groove 111 may be formed by the base plate 110 being recessed inward; or, the positioning groove 111 may be formed by the first beam 130 and the base plate 110 being recessed inward respectively.

[0129] The number of positioning grooves 111 can be one or more. Optionally, the number of positioning grooves 111 can be the same as the number of adhesive layers 150.

[0130] For example, in some embodiments, there may be multiple positioning grooves 111, and the multiple positioning grooves 111 may be distributed sequentially at intervals along the length direction L of the first beam 130; in this way, multiple adhesive layers 150 may be coated in the corresponding positioning grooves 111 and used to bond and fix the first beam 130 and the base plate 110.

[0131] This configuration, by forming a positioning groove 111 between the first beam 130 and the base plate 110 to accommodate the adhesive layer 150, improves the accuracy of the position of the adhesive layer 150 and reduces the probability of adhesive overflow.

[0132] Please refer to Figures 6 to 9 In some embodiments, the base plate 110 is recessed opposite to the first beam 130 to form a positioning groove 111.

[0133] In this embodiment, the positioning groove 111 can be formed on the base plate 110. The positioning groove 111 is recessed on the surface of the base plate 110 away from the first beam 130 to accommodate the adhesive layer 150, so that when the first beam 130 is locked to the base plate 110, the adhesive layer 150 can bond with the base plate 110.

[0134] Optionally, the positioning groove 111 may be, but is not limited to, a circular groove, a rectangular groove, a strip groove, etc. The number of positioning grooves 111 may be one or more.

[0135] For example, in some embodiments, the positioning groove 111 can be a strip groove formed on the base plate 110; the number of positioning grooves 111 can be multiple, for example, three; the three strip grooves can be distributed sequentially and spaced apart on the base plate 110 along the length direction L of the first beam 130; by coating each strip groove with an adhesive layer 150, the base plate 110 and the first beam 130 are bonded together using the adhesive layer 150, so as to fix the base plate 110 and the first beam 130 and relieve the stress concentration of the first fastener 140.

[0136] This design utilizes the positioning groove 111 formed by the recess on the base plate 110 to accommodate the adhesive layer 150, thereby improving the accuracy of the position of the adhesive layer 150 and reducing the probability of adhesive overflow.

[0137] Please refer to Figures 6 to 8 as well as Figure 10 In some embodiments, the first beam 130 is provided with a clearance groove 132 on the side facing the bottom plate 110, and the positioning groove 111 and the clearance groove 132 are staggered along the length direction L of the first beam 130.

[0138] The clearance groove 132 is provided on the side of the first beam 130 facing the bottom plate 110; when the first beam 130 is connected to the bottom plate 110, the clearance groove 132 can pass through the first beam 130 and connect the areas on opposite sides of the first beam 130 in the direction perpendicular to its own length direction L, so as to facilitate the arrangement of the components inside the box 10.

[0139] Optionally, the number of clearance slots 132 opened on the first beam 130 can be one or more; when there are multiple clearance slots 132, the multiple clearance slots 132 can be arranged sequentially at intervals along the length direction L of the first beam 130.

[0140] Along the length direction L of the first beam 130, the positioning groove 111 and the clearance groove 132 are staggered; that is, along the length direction L of the first beam 130, a gap is formed between the positioning groove 111 and the adjacent clearance groove 132, and the positioning groove 111 and the adjacent clearance groove 132 will not overlap; this can reduce the influence of the clearance groove 132 on the positioning groove 111 accommodating the adhesive layer 150, so as to reduce the probability of the adhesive layer 150 overflowing from the clearance groove 132.

[0141] Optionally, one or more clearance grooves 132 may be provided in the portion of the first beam 130 between two adjacent positioning grooves 111 along the length direction L of the first beam 130; or, clearance grooves 132 may not be provided between at least two adjacent positioning grooves 111.

[0142] Alternatively, along the length direction L of the first beam 130, one or more positioning grooves 111 may be provided between two adjacent clearance grooves 132 provided on the first beam 130; or, no positioning groove 111 may be provided between at least two adjacent clearance grooves 132.

[0143] With this configuration, when the first beam 130 has an avoidance groove 132, the positioning groove 111 and the avoidance groove 132 can be staggered along the length direction L of the first beam 130, reducing the probability of mutual influence between the positioning groove 111 and the avoidance groove 132.

[0144] Please refer to Figures 6 to 8 as well as Figure 10 In some embodiments, the distance between the end of the positioning groove 111 and the end of the clearance groove 132 along the length direction L of the first beam 130 is m, where m ≥ 1 mm.

[0145] Understandably, the distance m between the slot end of the positioning groove 111 and the slot end of the clearance groove 132 refers to the minimum distance between the slot end of the positioning groove 111 facing the adjacent clearance groove 132 and the slot end of the clearance groove 132 facing the positioning groove 111 along the length direction L of the first beam 130.

[0146] With this setting, the distance m between the groove end of the positioning groove 111 and the groove end of the clearance groove 132 is limited to greater than or equal to 1mm, so that there is a sufficient gap between the groove end of the positioning groove 111 and the groove end of the clearance groove 132, thereby further reducing the probability of mutual influence between the positioning groove 111 and the clearance groove 132.

[0147] Please refer to Figure 6 and Figure 7 In some embodiments, the battery device 100 further includes a bottom protective plate 30, which is disposed on the outer side of the bottom plate 110; a support member 40 is also disposed between the bottom plate 110 and the bottom protective plate 30, and the support member 40 is connected to the bottom plate 110 and the bottom protective plate 30.

[0148] The bottom protective plate 30 refers to a structural component used to protect the outer wall surface of the bottom plate 110. The bottom protective plate 30 can be fixedly connected to form a whole by means of bolt fastening, welding, bonding, etc.

[0149] The support member 40 is disposed between the base plate 110 and the bottom protective plate 30, and is connected to both the base plate 110 and the bottom protective plate 30. In some embodiments, the support member 40 can be connected to the base plate 110 and the bottom protective plate 30 respectively by adhesive bonding.

[0150] Optionally, the support member 40 may be, but is not limited to, a support block, a support plate, a support strip, a support layer, or other support structure; the material of the support member 40 may be, but is not limited to, foam, fiberglass, or other materials with high toughness.

[0151] With this configuration, the support member 40 connects the base plate 110 and the bottom guard plate 30 simultaneously. The support member 40 can strengthen the connection of the base plate 110, thereby limiting the vibration of the base plate 110 under vibration conditions and effectively reducing the stress formed on the first fastener 140.

[0152] Please refer to Figure 6 and Figure 7 In some embodiments, the support member 40 includes foam, with the opposite ends of the foam bonded to the base plate 110 and the bottom guard plate 30, respectively.

[0153] In this embodiment, the support member 40 is made of foam, and the two ends of the foam are respectively glued to the base plate 110 and the bottom protective plate 30.

[0154] With this configuration, when the base plate 110 tends to move away from the adhesive layer 150, the foam can provide a supporting action against the base plate 110. When the base plate 110 tends to move toward the adhesive layer 150 and compress the adhesive layer 150, the foam can apply tension to the base plate 110. This can limit the vibration of the base plate 110, thereby relieving the stress formed on the first fastener 140.

[0155] Please refer to Figure 6 and Figure 7 In some embodiments, a buffer protection member 50 is also provided between the base plate 110 and the bottom protective plate 30. The buffer protection member 50 is integrally formed with the support member 40, and the buffer protection member 50 and the support member 40 are connected to the base plate 110 and the bottom protective plate 30.

[0156] The buffer protection component 50 refers to the component used to connect the base plate 110 and the bottom protective plate 30 to provide buffer protection for the base plate 110 and the battery cells 20 and other components located inside the base plate 110.

[0157] Optionally, the buffer protection member 50 can be fixedly connected to at least one of the base plate 110 and the bottom guard plate 30 by adhesive bonding; when the buffer protection member 50 is fixedly bonded to one of the base plate 110 and the bottom guard plate 30, the buffer protection member 50 can abut against the other.

[0158] The buffer protection component 50 may be, but is not limited to, a buffer block, a buffer plate, a buffer strip, a buffer layer, or other buffer structure; the material of the buffer protection component 50 may be, but is not limited to, foam, fiberglass, or other materials with high toughness.

[0159] In this embodiment, the buffer protection member 50 and the support member 40 can be integrally formed; that is, the buffer protection member 50 and the support member 40 can be made of the same material, such as foam; in this way, the foam used as the buffer protection member 50 and the foam used as the support member 40 can be a whole.

[0160] For example, in some embodiments, the cushioning member 50 can be a first foam, which is disposed between the base plate 110 and the cushioning member 50, with one end of the first foam bonded to the bottom guard plate 30 and the other end of the first foam abutting against the base plate 110; the support member 40 can be a second foam, which is located at the outer edge of the first foam, and the second foam and the first foam are integral structures; the opposite ends of the second foam are bonded to the base plate 110 and the bottom guard plate 30 respectively.

[0161] With this configuration, the buffer protection component 50 is placed between the base plate 110 and the bottom protective plate 30 to form a buffer protection function. By making the buffer protection component 50 and the support component 40 integrally molded, the number of parts can be reduced and the assembly efficiency can be improved.

[0162] It should be understood that in other embodiments, the support member 40 and the buffer protection member 50 can also be provided separately, that is, the support member 40 and the buffer member are two independent components; in this way, the support member 40 and the buffer protection member 50 can be assembled separately.

[0163] The battery device 100 provided in this application will now be described in detail according to specific embodiments.

[0164] Please refer to Figures 4 to 10 In this embodiment, the battery device 100 includes a battery cell 20 and a housing 10. The housing 10 includes a base plate 110, a frame 120, and a first beam 130. The base plate 110 is connected to one end of the frame 120 and encloses a receiving space 101. The first beam 130 is disposed in the receiving space 101, and the opposite ends of the first beam 130 are connected to the frame 120. The first beam 130 is connected to the base plate 110 by a first fastener 140. The first beam 130 divides the receiving space 101 to form a receiving cavity 102. The battery cell 20 is housed in the receiving cavity 102 and is connected to the base plate 110.

[0165] The first beam 130 has a first wall 131 inside, and the interior of the first beam 130 is divided by the first wall 131 to form a first cavity 131a and a second cavity 131b. The second cavity 131b is located on the side of the first cavity 131a that is close to the receiving cavity 102.

[0166] The number of first fasteners 140 can be multiple, and the multiple first fasteners 140 can be arranged sequentially along the length direction L of the first beam 130; the multiple first fasteners 140 are all locked to the base plate 110 and the first beam 130, and the multiple first fasteners 140 are all inserted through the base plate 110 and the first beam 130 and extend into the first cavity 131a.

[0167] An adhesive layer 150 is also provided between the first beam 130 and the base plate 110, and the first beam 130 is bonded to the base plate 110 through the adhesive layer 150; the adhesive layer 150 can be a strip-shaped adhesive structure arranged along the length direction L of the first beam 130. The first beam 130 is located on the side of a plurality of first fasteners 140 arranged sequentially along the length direction L of the first beam 130 facing the battery cell 20. The base plate 110 is recessed opposite to the first beam 130 to form a positioning groove 111, and at least a portion of the adhesive layer 150 is accommodated in the positioning groove 111.

[0168] The battery assembly 100 also includes a bottom protective plate 30, which is disposed on the outer side of the bottom plate 110. A support member 40 and a buffer protective member 50 are also disposed between the bottom plate 110 and the bottom protective plate 30. The support member 40 and the buffer protective member 50 can both be made of foam and are integrally formed. The support member 40 can be simultaneously bonded to the bottom plate 110 and the bottom protective plate 30, and the buffer protective member 50 can be bonded and fixed to at least one of the bottom plate 110 and the bottom protective plate 30.

[0169] Please refer to Figures 1 to 3 This application embodiment also provides an electrical device, including the battery device 100 as described above, the battery device 100 being used to provide electrical energy.

[0170] The electrical device provided in this application embodiment is, for example, the vehicle described above. The electrical device includes the battery device 100 described above. When the battery device 100 is mounted and used, it is less likely to suffer local damage, and the reliability of the electrical device is better.

[0171] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that: include Battery cells; and The housing includes a base plate, a frame, and a first beam. The base plate is connected to one end of the frame and encloses a receiving space. The first beam is disposed within the receiving space, and its opposite ends are connected to the frame. The first beam is connected to the base plate by a first fastener. The first beam divides the receiving space into a receiving cavity, and the battery cell is housed within the receiving cavity. The battery cell is connected to the base plate. An adhesive layer is provided between the first beam and the base plate. The first beam is bonded to the base plate through the adhesive layer, and at least a portion of the adhesive layer is located on the side of the first fastener near the receiving cavity.

2. The battery device according to claim 1, characterized in that: Along the length of the first beam, at least a portion of the adhesive layer is located in the middle of the first beam.

3. The battery device according to claim 1, characterized in that: The number of the first fasteners is multiple; the multiple first fasteners are arranged sequentially along the length direction of the first beam, and the adhesive layer is arranged along the length direction of the first beam and located on the side of the multiple first fasteners close to the receiving cavity.

4. The battery device according to claim 3, characterized in that: In the direction perpendicular to the length of the first beam, the width of the end face of the first beam facing the bottom plate is d, and the width of the adhesive layer is h; wherein, 0.05d≤h≤0.8d.

5. The battery device according to claim 3, characterized in that: The housing also includes a second fastener, and the first beam is also connected to the base plate by the second fastener; the second fastener is disposed on at least one side of the adhesive layer along the length direction of the first beam.

6. The battery device according to claim 3, characterized in that: The first beam has a first wall inside, and the interior of the first beam is divided by the first wall to form a first cavity and a second cavity. The second cavity is located on the side of the first cavity near the receiving cavity. The first fastener passes through the base plate and the first beam and extends into the first cavity.

7. The battery device according to any one of claims 3 to 6, characterized in that: An adhesive layer is provided between two adjacent first fasteners; and / or, the adhesive layer is provided on the side of the first fastener opposite to the first beam.

8. The battery device according to any one of claims 1 to 6, characterized in that: The first beam has an exposed surface facing the base plate and exposed to the first fastener, and the exposed surface is bonded to the base plate by the adhesive layer.

9. The battery device according to any one of claims 1 to 6, characterized in that: A positioning groove is formed between the first beam and the base plate, and at least a portion of the adhesive layer is accommodated within the positioning groove.

10. The battery device according to claim 9, characterized in that: The base plate is recessed opposite to the first beam to form the positioning groove.

11. The battery device according to claim 9, characterized in that: The first beam has a clearance groove on the side facing the bottom plate, and the positioning groove and the clearance groove are staggered along the length of the beam.

12. The battery device according to claim 11, characterized in that: Along the length of the beam, the distance between the end of the positioning groove and the end of the clearance groove is m, where m ≥ 1 mm.

13. The battery device according to any one of claims 1 to 6, characterized in that: The battery device also includes a bottom protective plate, which is disposed on the outer side of the bottom plate; a support member is also disposed between the bottom plate and the bottom protective plate, and the support member is connected to the bottom plate and the bottom protective plate.

14. The battery device according to claim 13, characterized in that: The support component includes foam, with its two ends respectively bonded to the base plate and the bottom protective plate.

15. The battery device according to claim 13, characterized in that: A buffer protective component is also provided between the base plate and the bottom protective plate. The buffer protective component is integrally formed with the support component, and the buffer protective component and the support component are connected to the base plate and the bottom protective plate.

16. An electrical appliance, characterized in that: Includes the battery device as described in any one of claims 1 to 15, the battery device being used to provide electrical energy.

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