Battery device and electric device

Abstract

This application relates to the field of battery structure technology, and provides a battery device and an electrical device. The battery device includes a housing and battery cells. The battery cells include a shell and electrode terminals. The electrode terminals are disposed on a first wall, and a current-collecting component is disposed on the electrode terminals. An adhesive area is also disposed on the first wall, and the adhesive area is bonded to the first housing. In the battery cells disposed in a first direction and adjacent to any mounting part, the adhesive area is located on the side of the electrode terminals away from the adjacent mounting part, and the current-collecting component is connected to the first housing. The battery device provided in this application, by connecting the current-collecting component disposed on the electrode terminals closer to the mounting part to the first housing, can effectively reduce the cantilever length formed by the connection between the battery cells and the first housing, and the connection stability between the battery cells and the first housing is better, thereby making the structural strength of the entire battery device more stable.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] The battery assembly mainly consists of a housing and individual battery cells. The individual battery cells are assembled inside the housing, and the housing is mounted on the electrical device via mounting parts at opposite ends, such as the bottom of an electric vehicle, to form an assembly.

[0004] To improve the overall structural strength of the battery pack, the top of the individual battery cells is usually bonded to the inner wall of the housing. However, in some applications, the bonding area between the battery cells and the housing needs to be located on the side of the electrode terminals away from the mounting portion. This results in a longer cantilever formed by the bonding area relative to the mounting portion, making it easy for the battery cells to detach from the housing under vibration conditions. Utility Model Content

[0005] The purpose of this application is to provide a battery device and an electrical device, which aims to solve the problem that when the bonding area between the battery cell and the casing needs to be located on the side of the electrode terminal away from the mounting part, the cantilever is too long, which makes the fixed connection between the battery cell and the casing prone to failure.

[0006] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0007] In a first aspect, embodiments of this application provide a battery device, including a housing and battery cells. The housing includes a first housing and a second housing, with the first housing covering the second housing and forming a receiving cavity. The second housing has mounting portions at opposite ends along a first direction. The battery cells are housed within the receiving cavity, and each battery cell includes a housing and electrode terminals. The housing includes a first wall near the first housing and a second wall near the second housing, with the second wall connected to the second housing. The electrode terminals are disposed on the first wall, and a busbar component is disposed on the electrode terminals. An adhesive area is also disposed on the first wall, and the adhesive area is adhered to the first housing. In the battery cells disposed along the first direction and adjacent to any mounting portion, the adhesive area is located on the side of the electrode terminals away from the adjacent mounting portion, and the busbar component is connected to the first housing.

[0008] The beneficial effects of the embodiments of this application are as follows: The battery device provided in the embodiments of this application uses an adhesive area provided on the side of the electrode terminal away from the adjacent mounting part to be bonded and fixed to the first housing. The cantilever formed by the adhesive area connecting to the first housing is relatively long. By connecting the busbar provided on the electrode terminal closer to the mounting part to the first housing, the cantilever length formed by the connection between the battery cell and the first housing can be effectively reduced, the connection stability between the battery cell and the first housing is better, and the structural strength of the entire battery device is more stable.

[0009] In some embodiments, in a battery cell located in a first direction and adjacent to any mounting portion, an electrode terminal is disposed on an end of a first wall near the adjacent mounting portion.

[0010] By adopting the above technical solution, the electrode terminal is set at one end of the mounting part close to the adjacent part along the first direction, so that the cantilever formed by the connection between the current collector connected to the electrode terminal and the first housing is shorter, thus further improving the stability of the bonding and fixing of the battery cell to the first housing.

[0011] In some embodiments, in the second direction, a plurality of battery cells are arranged sequentially to form a battery cell assembly, and the electrode terminals of the plurality of battery cells are electrically connected through a busbar; wherein, the second direction is perpendicular to the first direction; a convex structure is provided on the first housing, the busbar and the electrode terminals are housed inside the convex structure, and the busbar is connected to the inner wall surface of the convex structure.

[0012] By adopting the above technical solution, an outward protruding structure can be provided on the first housing to accommodate the electrode terminals and busbar components in the battery cell assembly, thereby eliminating the need for overall adjustment of the first housing in the direction away from the second housing, and thus improving the volume utilization rate of the accommodating cavity.

[0013] In some embodiments, the number of battery cell assemblies is at least two groups, and multiple groups of battery cell assemblies are arranged sequentially along a first direction; the number of convex structures is at least one, and the electrode terminals and connected busbars of each battery cell assembly are respectively housed inside the corresponding convex structure.

[0014] By adopting the above technical solution, when there are multiple sets of battery cell modules, the electrode terminals of the multiple sets of battery cell modules and the connected busbar components can be respectively housed inside the corresponding convex structure, so as to further improve the space utilization of the cavity and thus improve the energy density of the battery device.

[0015] In some embodiments, the number of battery cell assemblies is two sets, and the number of protruding structures is two. The electrode terminals of the two sets of battery cell assemblies and the connected busbar components are respectively housed in the corresponding protruding structures.

[0016] By adopting the above technical solution, when there are two sets of battery cell modules, two protruding structures can be used to accommodate the electrode terminals and busbar components in the two sets of battery cell modules respectively, thereby improving the space utilization of the accommodating cavity.

[0017] In some embodiments, in the first direction, the electrode terminals of the battery cells in each group of battery cell assemblies are all disposed at one end of the first wall near the adjacent mounting portion, and two protruding structures are respectively located at opposite ends of the first housing along the first direction.

[0018] By adopting the above technical solution, the electrode terminals are set at one end of the first wall near the adjacent mounting part, and the two opposite ends of the first housing along the first direction are provided with outward protruding structures to respectively accommodate the corresponding electrode terminals and the busbar components. Thus, the outward protruding structures are located on opposite sides of the battery device in the first direction. When the battery device is mounted and used, it occupies less space in the middle area of ​​the power device.

[0019] In some embodiments, the battery device further includes a sampling component electrically connected to a battery cell; at least a portion of the sampling component is housed within a convex structure.

[0020] By adopting the above technical solution, at least part of the sampling component can be housed within the convex structure, thereby reducing the impact of the sampling component's placement on the space of the receiving cavity, and allowing more space within the receiving cavity to be used for arranging individual battery cells.

[0021] In some embodiments, the mounting portion has a mounting groove along the depth direction of the outwardly protruding structure.

[0022] By adopting the above technical solution, when the battery device is mounted and assembled through the mounting slot of the mounting part, it can be assembled along the depth direction of the convex structure, which is beneficial to the docking assembly of the convex structure.

[0023] In some embodiments, a first insulating protective layer is provided on the inner wall surface of the convex structure, and the busbar component is bonded to the first insulating protective layer.

[0024] By adopting the above technical solution, and by setting a first insulating protective layer on the inner wall of the convex structure, the creepage distance between the inner wall of the convex structure and the electrode terminals and the busbar components can be effectively increased, thereby effectively reducing the probability of short circuits.

[0025] In some embodiments, an adhesive area is formed on the side of the first wall near the adjacent mounting portion of the electrode terminal.

[0026] By adopting the above technical solution, when the first wall has a blank space on the other side of the electrode terminal near the adjacent mounting part, an adhesive area can also be formed on the other side of the electrode terminal near the adjacent mounting part, so as to further increase the bonding area between the first wall and the first housing, thereby further improving the connection strength between the battery cell and the first housing.

[0027] In some embodiments, the electrode terminals include a positive terminal and a negative terminal. On the same battery cell, the distance between the two points on the outer contours of the positive terminal and the outer contours of the negative terminal that are furthest apart along a first direction is less than or equal to half the dimension of the first wall along the first direction.

[0028] By adopting the above technical solution, and by limiting the distance between the positive and negative terminals, the positive and negative terminals are positioned closer together. This allows for the use of a smaller convex structure to accommodate the positive and negative terminals, thereby reducing the overall size of the battery device.

[0029] In some embodiments, a second insulating protective layer is provided on the inner wall of the first housing, and the adhesive area is bonded to the second insulating protective layer.

[0030] By adopting the above technical solution, a second insulating protective layer is provided on the inner side wall of the first enclosure to increase the creepage distance between the first enclosure and the first wall, and to insulate the first enclosure from the battery cells, thereby reducing the probability of short circuit between the battery cells and the first enclosure.

[0031] In some embodiments, the battery device further includes an insulating film covering at least a portion of the outer casing; the insulating film has an opening that is disposed opposite to the adhesive area.

[0032] By adopting the above technical solution, an insulating film is used to insulate and separate the casing of the box and the battery cell, while an avoidance opening is opened to avoid the adhesive area, thereby improving the connection strength between the battery cell and the first box.

[0033] In some embodiments, the battery device further includes a connector, which is housed within a receiving cavity and connected to a first housing and a second housing; in a first direction, a connector is provided between at least one end of the mounting portion and an adjacent battery cell.

[0034] By adopting the above technical solution, by setting a connector in the receiving cavity, the connector is set between the battery cell and the adjacent mounting part, and the connector is used to connect the first box and the second box at the same time, so as to improve the overall structural strength of the battery device.

[0035] Secondly, embodiments of this application also provide an electrical device, including the battery device as described above, the battery device being used to provide electrical energy.

[0036] 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 structural strength of the battery device is better, the structural stability of the electrical device is also better. Attached Figure Description

[0037] 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.

[0038] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0039] Figure 2 An exploded view of a battery device provided for some embodiments of this application;

[0040] Figure 3 This is an exploded view of a battery cell provided in some embodiments of this application;

[0041] Figure 4 This application provides a schematic diagram of the internal structure of a battery device according to some embodiments;

[0042] Figure 5 An exploded view of another battery device provided in some embodiments of this application;

[0043] Figure 6 This is a schematic diagram of the internal structure of another battery device provided in some embodiments of this application;

[0044] Figure 7 An internal cross-sectional view of another battery device provided for some embodiments of this application;

[0045] Figure 8 for Figure 7 A magnified view of part A;

[0046] Figure 9 This is a schematic diagram of the structure of a battery device with a connector disposed inside the receiving cavity, provided in some embodiments of this application.

[0047] The following are the labeling elements in the figure:

[0048] 1000, vehicles;

[0049] 100. Battery assembly; 200. Controller; 300. Motor;

[0050] 10. Housing; 101. Receiving cavity; 11. First housing; 111. Outward protrusion structure; 12. Second housing; 13. Mounting part; 131. Mounting slot;

[0051] 20. Battery cell; 210. Battery cell assembly; 21. Casing; 211. Housing; 212. End cap; 21a. First wall; 21b. Second wall; 22. Electrode assembly; 22a. Tab; 23. Electrode terminal; 231. Positive terminal; 232. Negative terminal; 24. Adhesive area;

[0052] 30. Busbar components; 40. Connectors;

[0053] X, the first direction; Y, the second direction. Detailed Implementation

[0054] The embodiments of this application are described in detail below. Examples of the 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The battery assembly mainly consists of a housing and individual battery cells. The battery cells are assembled inside the housing, which is then mounted on the electrical device via mounting brackets at both ends, such as the bottom of an electric vehicle. Electric vehicles generate vibrations during operation, subjecting the battery assembly mounted on the vehicle's bottom to these vibrations. Prolonged exposure to vibration puts significant strain on the battery assembly's structural strength; if the structure is weak, the battery assembly is highly susceptible to damage, thus affecting its lifespan.

[0060] To improve the overall structural strength of battery packs, the top of the individual battery cells is typically bonded to the inner wall of the casing. However, in some applications, such as due to limitations imposed by assembly requirements, space constraints, or manufacturing processes, the bonding area between the battery cells and the casing needs to be located on the side of the electrode terminals away from the mounting portion. This results in a longer cantilever formed by the bonding area relative to the mounting portion, making it easier for the battery cells to detach from the casing under vibration conditions, thus weakening the overall structural strength of the battery pack.

[0061] Based on the above considerations, in order to solve the problem that the fixed connection between the battery cell and the housing is prone to failure due to the long cantilever when the bonding area between the battery cell and the housing needs to be set on the side of the electrode terminal away from the mounting part, a battery device is designed. By bonding the adhesive area set on the side of the electrode terminal away from the adjacent mounting part to the first housing, and simultaneously connecting the current-combining component set on the electrode terminal closer to the mounting part to the first housing, the cantilever length formed by the connection between the battery cell and the first housing can be effectively reduced, the connection stability between the battery cell and the first housing is better, and thus the structural strength of the entire battery device is more stable.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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 210 for providing voltage and capacity. The battery cell assembly 210 may include a plurality of battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0067] In some embodiments, the battery cell assembly 210 is typically formed by arranging a plurality of battery cells 20.

[0068] As an example, the battery cell assembly 210 can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0069] In some embodiments, the battery device may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 210, the battery cell assemblies 210 being housed in the housing 10.

[0070] As an example, the battery cell assembly 210 can be a battery module, and the battery cell assembly 210 can be housed in the housing 10 by fixing the battery module in the housing 10.

[0071] As an example, the battery cell assembly 210 can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0072] 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 210. 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.

[0073] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The first housing 11 may be the top cover, and the second housing 12 may be an open-type accommodating structure formed by the combination of the frame and the bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms a closed space to accommodate the battery cell assembly 210.

[0074] In some embodiments, the housing 10 can be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 can be at least a part of the floor of the vehicle 1000, or a portion of the housing 10 can be at least a part of the crossbeams and longitudinal beams of the vehicle 1000. In other embodiments, the housing 10 can also be mounted on the bottom of the vehicle 1000. For example, a mounting beam can be provided on the housing 10, and the entire battery device 100 can be mounted on the bottom of the vehicle 1000 by fixing the mounting beam to the vehicle 1000.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] According to some embodiments of this application, refer to Figures 2 to 4 This application provides a battery device 100, including a housing 10 and a battery cell 20. The housing 10 includes a first housing 11 and a second housing 12. The first housing 11 covers the second housing 12 and forms a receiving cavity 101. The second housing 12 has mounting portions 13 at opposite ends along a first direction X. The battery cell 20 is housed in the receiving cavity 101. The battery cell 20 includes a housing 21 and electrode terminals 23. The housing 21 includes a first wall 21a near the first housing 11 and a second wall 21a near the first housing 11. The second wall 21b of the second housing 12 is connected to the second housing 12; the electrode terminal 23 is disposed on the first wall 21a, and a busbar component 30 is disposed on the electrode terminal 23; the first wall 21a is also provided with an adhesive area 24, which is bonded to the first housing 11; in the battery cell 20 disposed in the first direction X and adjacent to any mounting part 13, the adhesive area 24 is located on the side of the electrode terminal 23 away from the adjacent mounting part 13, and the busbar component 30 is connected to the first housing 11.

[0079] The housing 10 includes a first housing 11 and a second housing 12. In some embodiments, the first housing 11 may be a top cover, and the second housing 12 includes a frame and a bottom plate. The bottom plate covers one end of the frame and is combined to form a semi-closed structure with an opening. The first housing 11 covers the second housing 12, that is, the top cover covers the other end of the frame relative to the bottom plate, so that the top cover and the bottom plate together enclose the frame and form a receiving cavity 101.

[0080] The second housing 12 has mounting portions 13 at opposite ends along the first direction X. Understandably, the mounting portions 13 are used to fix and suspend the battery device 100 onto an external structure, enabling the entire battery device 100 to be mounted. Optionally, the mounting portions 13 can be, but are not limited to, block structures, plate structures, rod structures, beam structures, etc. Taking a mounting beam as an example, the mounting beam can be fixed to opposite ends of the second housing 12 along the first direction X by welding, fastener connection, etc. Connection holes can be provided on the mounting beam for fasteners to pass through and fix the mounting beam to the external structure. The first direction X can be the length direction or width direction of the second housing 12, etc.

[0081] The battery cell 20 is housed within the receiving cavity 101; wherein, the battery cell 20 refers to the smallest unit constituting the battery device 100. Figure 3As shown, the battery cell 20 includes a housing 21, an electrode assembly 22, electrode terminals 23, and other functional components. The electrode assembly 22 is housed inside the housing 21, and the electrode terminals 23 are disposed on the housing 21. The electrode terminals 23 are electrically connected to the internal electrode assembly 22 to realize the input or output of electrical energy.

[0082] In some embodiments, the housing 21 includes a housing 211 and an end cap 212 that covers the opening of the housing 211. The end cap 212 is a component that covers the opening of the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 212 may be adapted to the shape of the housing 211 to fit it. Optionally, the end cap 212 may be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 212 is less prone to deformation under pressure and impact, allowing the battery cell 20 to have higher structural strength and improved reliability. Functional components such as electrode terminals 23 may be provided on the end cap 212. The electrode terminals 23 can be used for electrical connection with the electrode assembly 22 for outputting or inputting electrical energy into the battery cell 20. In some embodiments, the end cap 212 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap 212 can be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. In some embodiments, an insulating element can be provided on the inner side of the end cap 212. The insulating element can be used to isolate the electrical connection components inside the housing 211 from the end cap 212 to reduce the risk of short circuits. For example, the insulating element can be plastic, rubber, etc.

[0083] The housing 211 is a component used to cooperate with the end cap 212 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 22, electrolyte, and other components. The housing 211 and the end cap 212 can be independent components. An opening can be provided on the housing 211, and the end cap 212 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 212 and the housing 211 can be integrated. Specifically, the end cap 212 and the housing 211 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 211, the end cap 212 closes the housing 211. The housing 211 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 22. The housing 211 can be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0084] Electrode assembly 22 is the component in the battery cell 20 where electrochemical reactions occur. The casing 211 may contain one or more electrode assemblies 22. The electrode assembly 22 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 22, while the portions of the positive and negative electrode sheets without active material each constitute a tab 22a. 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 22a connect to the electrode terminals 23 to form a current loop.

[0085] The outer casing 21 also includes a first wall 21a and a second wall 21b; wherein, the first wall 21a refers to the side wall structure of the outer casing 21 near the first housing 11, and in some embodiments, the first wall 21a refers to the side wall of the outer casing 21 with the end cap 212 facing the first housing 11. The second wall 21b refers to the side wall structure of the outer casing 21 near the second housing 12, and in some embodiments, the second wall 21b refers to the side wall of the outer casing 211 facing the bottom plate in the second housing 12; the second wall 21b can be connected to the inner wall of the second housing 12 by means of adhesive, fastener connection, snap connection, abutment, etc.

[0086] The first wall 21a of the outer casing 21 is also provided with electrode terminals 23 and adhesive area 24; wherein, electrode terminals 23 refer to mechanical components with good conductivity, such as copper terminals, aluminum terminals, alloy terminals, etc. Electrode terminals 23 are also provided with busbar components 30; busbar components 30 can be, but are not limited to, conductive sheet structures such as aluminum sheets, iron sheets, copper sheets, silver sheets, gold sheets, etc.; busbar components 30 are used to connect electrode terminals 23 so that electrode terminals 23 form an electrical connection with other components. Adhesive area 24 refers to the area on the first wall 21a used for applying adhesive and bonding to the inner wall surface of the first housing 11. It should be understood that the distance between the adhesive area 24 provided on the first wall 21a and the first housing 11 is greater than the distance between the electrode terminal 23 provided on the first wall 21a and the busbar 30 provided on the electrode terminal 23 and the first housing 11. In order for the adhesive area 24 to be successfully bonded to the first housing 11, a filler block can be used to bond the filler block between the adhesive area 24 of the first wall 21a and the first housing 11. Alternatively, a clearance groove can be provided on the inner wall surface of the first housing 11 so that the electrode terminal 23 and the busbar 30 are accommodated in the clearance groove, thereby allowing the adhesive area 24 of the first wall 21a to abut against the inner wall surface of the first housing 11 and form an adhesive bond.

[0087] Optionally, the number of battery cells 20 can be any number, such as one, two, three, or more. The battery cells 20 can be disposed anywhere in the receiving cavity 101; for example, the battery cells 20 can be disposed near the mounting portion 13 at either end in the first direction X.

[0088] In the battery cell 20 located in the first direction X and adjacent to any mounting portion 13, the adhesive area 24 is located on the side of the electrode terminal 23 away from the adjacent mounting portion 13, and the busbar 30 is connected to the first housing 11. Thus, the cantilever formed by the connection between the busbar 30, which is closer to the adjacent mounting portion 13 in the first direction X, and the first housing 11 is effectively shortened, thereby improving the overall connection stability between the battery cell 20 and the first housing 11. Optionally, the connection method between the busbar 30 and the first housing 11 includes, but is not limited to, adhesive connection, snap-fit ​​connection, and binding connection.

[0089] The adhesive area 24 is located on the side of the first wall 21a away from the adjacent mounting portion 13 of the electrode terminal 23. Thus, the electrode terminal 23 is provided at one end of the first wall 21a near the adjacent mounting portion 13, for example, at the end region of the first wall 21a near the adjacent mounting portion 13, or in a section of the first wall 21a along the first direction X, biased towards the adjacent mounting portion 13.

[0090] It should be understood that, in the first direction X, when a battery cell 20 is disposed between one end of the mounting portion 13 and another battery cell 20 disposed between the other end of the mounting portion 13, the positions of the electrode terminal 23 and the adhesive area 24 on the first wall 21a of the battery cell 20 disposed therebetween can be arbitrarily arranged. For example, the adhesive area 24 can be located on either side of the electrode terminal 23, and the busbar 30 connected to the electrode terminal 23 can be connected to the inner wall surface of the first housing 11.

[0091] The battery cell 20 adjacent to the mounting portion 13 in the first direction X refers to one or more battery cells 20 with the smallest distance from the mounting portion 13 in the first direction X.

[0092] The battery device 100 provided in this application embodiment is bonded and fixed to the first housing 11 by an adhesive area 24 provided on the side of the electrode terminal 23 away from the adjacent mounting part 13. The cantilever formed by the adhesive area 24 connecting to the first housing 11 is relatively long. By connecting the busbar 30 provided on the electrode terminal 23 closer to the mounting part 13 to the first housing 11, the cantilever length formed by the connection between the battery cell 20 and the first housing 11 can be effectively reduced, and the connection stability between the battery cell 20 and the first housing 11 is better, thereby making the structural strength of the entire battery device 100 more stable.

[0093] Please refer to Figure 5 and Figure 6 In some embodiments, in a battery cell 20 located in the first direction X and adjacent to any mounting portion 13, an electrode terminal 23 is disposed on the first wall 21a near one end of the adjacent mounting portion 13.

[0094] In this embodiment, the electrode terminal 23 is disposed at one end of the first wall 21a along the first direction X, close to the adjacent mounting portion 13. Thus, the electrode terminal 23 is closest to the adjacent mounting portion 13. When the busbar component 30 disposed on the electrode terminal 23 is connected to the inner wall surface of the first housing 11, the cantilever formed by the busbar component 30 connecting the first housing 11 is shorter. This effectively reduces the overall cantilever length formed by the battery cell 20 connecting the first housing 11, thereby improving the connection stability between the battery cell 20 and the first housing 11.

[0095] With this configuration, the electrode terminal 23 is positioned at one end of the mounting portion 13 adjacent to the first direction X, thereby making the cantilever formed by the connection between the current collector 30 connected to the electrode terminal 23 and the first housing 11 shorter. This further improves the stability of the bonding and fixing of the battery cell 20 and the first housing 11, and makes the stability of the battery cell 20 and the first housing 11 better in a vibration environment.

[0096] Please refer to Figures 2 to 4 In some embodiments, in the second direction Y, a plurality of battery cells 20 are arranged sequentially to form a battery cell assembly 210, and the electrode terminals 23 of the plurality of battery cells 20 are electrically connected through a busbar 30; wherein, the second direction Y is perpendicular to the first direction X; a protruding structure 111 is provided on the first housing 11, the busbar 30 and the electrode terminals 23 are housed inside the protruding structure 111, and the busbar 30 is connected to the inner wall surface of the protruding structure 111.

[0097] The second direction Y mentioned above refers to the direction perpendicular to the first direction X. In some embodiments, the first direction X and the second direction Y can be the length direction and width direction of the first housing 11, respectively. For example, in some embodiments, the first direction X can be the length direction of the first housing 11, and the second direction Y can be the width direction of the first housing 11. Thus, multiple battery cells 20 can be arranged sequentially along the width direction of the first housing 11 to form a battery cell assembly 210. The number of battery cell assemblies 210 can be one or more.

[0098] The busbar component 30 is used to connect the electrode terminals 23 of different battery cells 20 in the battery cell assembly 210, so that the battery cells 20 in the battery cell assembly 210 can form an electrical connection by means of series and / or parallel connection.

[0099] The first housing 11 is provided with a protruding structure 111. It should be understood that the protruding structure 111 refers to a structure formed by a recess in a portion of the inner wall surface of the first housing 11 in a direction opposite to the second housing 12, and protruding outwards towards the receiving cavity 101. Thus, the wall surface of the protruding structure 111 near the second housing 12 will form a recessed structure facing away from the second housing 12. That is, the distance from the inner wall surface of the protruding structure 111 to the first wall 21a is greater than the distance from the inner wall surface of the first housing 11 (excluding the protruding structure 111) to the first wall 21a. Therefore, the protruding structure 111 can be used to accommodate the electrode terminal 23 provided on the first wall 21a of the battery cell 20 and the busbar component 30 provided on the electrode terminal 23, so that the first housing 11 can be bonded and fixed to the adhesive area 24 of the first wall 21a.

[0100] The first housing 11 may have one protruding structure 111, which can accommodate and avoid the electrode terminals 23 and current-carrying components 30 of all battery cells 20. Alternatively, the first housing 11 may have two or more protruding structures 111, which can accommodate and avoid the electrode terminals 23 and current-carrying components 30 of each group of battery cell assemblies 210. For example, the electrode terminals 23 and current-carrying components 30 of each group of battery cell assemblies 210 may be accommodated in a corresponding protruding structure 111, or the electrode terminals 23 and current-carrying components 30 of each two or more adjacent groups of battery cell assemblies 210 may be accommodated in the same protruding structure 111.

[0101] It should be understood that, compared to increasing the space inside the cavity 101 to increase the distance between the first housing 11 and the second housing 12, and then using filler to indirectly connect the adhesive area 24 of the first wall 21a of the battery cell 20 and the first housing 11, the method of setting the protruding structure 111 on the first wall 21a can effectively reduce the increase in the volume of the entire housing 10, thereby improving the space utilization rate inside the housing 10.

[0102] With this configuration, an outwardly protruding structure 111 can be provided on the first housing 11 to accommodate the electrode terminals 23 and the busbar component 30 in the battery cell assembly 210, thereby eliminating the need to make overall adjustments to the first housing 11 in the direction away from the second housing 12, which can improve the volume utilization rate of the accommodating cavity 101 and achieve the purpose of increasing the energy density of the battery device 100.

[0103] Please refer to Figures 2 to 6In some embodiments, the number of battery cell assemblies 210 is at least two sets, and multiple sets of battery cell assemblies 210 are arranged sequentially along the first direction X; the number of protruding structures 111 is at least one, and the electrode terminals 23 of each battery cell assembly 210 and the connected busbar 30 are respectively housed inside the corresponding protruding structure 111.

[0104] In this embodiment, the number of battery cell assemblies 210 is two or more, and the multiple sets of battery cells 20 are distributed along the first direction X. Thus, the first set of battery cell assemblies 210 and the last set of battery cell assemblies 210 arranged sequentially along the first direction X are respectively adjacent to the mounting portions 13 at opposite ends.

[0105] When the number of battery cell assembly 210 is three or more, the battery cells 20 in the battery cell assembly 210 located between the first group of battery cell assembly 210 and the last group of battery cell assembly 210 are battery cells 20 that are not adjacent to the mounting portion 13; therefore, the electrode terminals 23 of the non-adjacent battery cells 20 can be provided at any location on the first wall 21a, for example, near the mounting portion 13 at either end, or in the middle region of the first wall 21a, and the adhesive area 24 can also be provided at any location on the first wall 21a.

[0106] The first housing 11 is provided with at least one protruding structure 111; optionally, the number of protruding structures 111 can be one, two, or more than two. For example, in some embodiments, the number of protruding structures 111 can be the same as the number of battery cell assemblies 210, so that the electrode terminals 23 and the connected busbar components 30 included in each battery cell assembly 210 can be respectively housed in a corresponding protruding structure 111; or, the number of protruding structures 111 can be less than the number of battery cell assemblies 210, so that the electrode terminals 23 and the busbar components 30 included in two or more adjacent battery cell assemblies 210 can be simultaneously housed in the same protruding structure 111.

[0107] With this configuration, when there are multiple sets of battery cell assemblies 210, the electrode terminals 23 of the multiple sets of battery cell assemblies 210 and the connected busbar components 30 can be respectively housed inside the corresponding protruding structure 111, so as to further improve the space utilization of the receiving cavity 101 and thereby improve the energy density of the battery device 100.

[0108] Please refer to Figures 2 to 6 In some embodiments, there are two sets of battery cell assemblies 210 and two protruding structures 111. The electrode terminals 23 of the two sets of battery cell assemblies 210 and the connected busbar components 30 are respectively housed in the corresponding protruding structures 111.

[0109] In this embodiment, there are two sets of battery cell assemblies 210. Thus, one set of the two sets of battery cell assemblies 210 is adjacent to one of the mounting parts 13, and the other set of the two sets of battery cell assemblies 210 is adjacent to the other mounting part 13.

[0110] Simultaneously, there are two protruding structures 111, which are spaced apart along the first direction X on the first housing 11. Each of the two protruding structures 111 is used to accommodate the electrode terminal 23 of the corresponding battery cell assembly 210 and the connected busbar component 30. For example, one of the two protruding structures 111 is located on the same side of the first direction X as a battery cell assembly 210 adjacent to one of the mounting portions 13, and the electrode terminal 23 of the battery cell assembly 210 and the connected busbar component 30 are accommodated within the protruding structure 111 on the same side. The other of the two protruding structures 111 is also located on the same side of the first direction X as a battery cell assembly 210 adjacent to another mounting portion 13, and the electrode terminal 23 of the battery cell assembly 210 and the connected busbar component 30 are accommodated within the protruding structure 111 on the same side.

[0111] It should be understood that the position of the protruding structure 111 corresponds to that of the electrode terminal 23 in the battery cell assembly 210 on the same side in the first direction X, so as to accommodate the electrode terminal 23 inside the protruding structure 111. Optionally, the electrode terminal 23 can be disposed at any location on the side of the first wall 21a near the adjacent mounting portion 13, for example, at the end of the first wall 21a near the adjacent mounting portion 13. Thus, the protruding structure 111 can be disposed at opposite ends of the first housing 11 along the first direction X, such as... Figure 6 As shown, or at any point between the first wall 21a and the adjacent end of the mounting portion 13, at a certain distance, the protruding structure 111 can be correspondingly disposed at the opposite ends of the first housing 11 along the first direction X, such as... Figure 4 As shown.

[0112] With this configuration, when there are two sets of battery cell assemblies 210, two protruding structures 111 can be used to accommodate the electrode terminals 23 and the busbar components 30 in the two sets of battery cell assemblies 210 respectively. Compared with the method of using one protruding structure 111 for accommodation, the method of using two protruding structures 111 to accommodate the electrode terminals 23 and the busbar components 30 of the corresponding battery cell assemblies 210 can provide the protruding structure 111 only for the first housing 11 where the electrode terminals 23 are located, and there is no need to form an additional protrusion between the electrode terminals 23 of the two sets of battery cell assemblies 210. This can effectively control the increase in volume of the housing 10 and improve the space utilization of the accommodating cavity 101.

[0113] Please refer to Figures 5 to 8 In some embodiments, in the first direction X, the electrode terminals 23 of the battery cells 20 in each group of battery cell assemblies 210 are all disposed at one end of the first wall 21a near the adjacent mounting portion 13, and the two protruding structures 111 are respectively located at opposite ends of the first housing 11 along the first direction X.

[0114] In this embodiment, the electrode terminals 23 of the battery cells 20 in each group of battery cell assemblies 210 are all disposed at one end of the first wall 21a near the adjacent mounting portion 13. As a result, when the busbar 30 disposed on the electrode terminal 23 is connected to the inner wall surface of the convex structure 111, the cantilever distance formed between the busbar 30 and the convex structure 111 and the adjacent mounting portion 13 is shorter. Therefore, the connection stability between the busbar 30 and the convex structure 111 is stronger, and the connection stability between the battery cell assembly 210 and the first housing 11 is better.

[0115] Meanwhile, the two protruding structures 111 are located at opposite ends of the first housing 11 along the first direction X. The two protruding structures 111 are used to accommodate the electrode terminals 23 and the connected busbar components 30 in the corresponding battery cell assembly 210. Furthermore, since the two protruding structures 111 are located at opposite ends of the first housing 11 along the first direction X, the protruding structures 111 have little impact on the space of the middle part above the first housing 11. When the battery device 100 is mounted and used, the protruding structures 111 have little impact on the usable space of the mounted electrical device. For example, taking a vehicle 1000 as an example of an electrical device, the battery device 100 is mounted on the bottom of the vehicle 1000 via a mounting part 13 for use, and the first direction X of the battery device 100 is arranged along the width direction of the vehicle 1000; the first housing 11 is arranged facing the vehicle 1000, and the protruding structure 111 provided on the first housing 11 will affect the bottom space of the vehicle 1000, which may affect the interior passenger space of the vehicle 1000; the two protruding structures 111 are provided at opposite ends of the first housing 11 along the first direction X, that is, the two protruding structures 111 are located at opposite ends of the vehicle 1000 along the width direction. Therefore, the protruding structure 111 has a lower impact on the middle part of the vehicle 1000 along the width direction, and the impact on the interior passenger space of the vehicle 1000 is also lower.

[0116] With this configuration, the electrode terminal 23 is located at one end of the first wall 21a near the adjacent mounting part 13, and protruding structures 111 are provided at opposite ends of the first housing 11 along the first direction X to respectively accommodate the corresponding electrode terminal 23 and the busbar 30. This makes the protruding structures 111 located on opposite sides of the battery device 100 in the first direction X. When the battery device 100 is mounted and used, it occupies less space in the middle area of ​​the power device.

[0117] Please refer to Figure 2 and Figure 4 In some embodiments, the battery device 100 further includes a sampling component (not shown) electrically connected to the battery cell 20; at least a portion of the sampling component is housed within the protruding structure 111.

[0118] The sampling component is used to collect information such as temperature and voltage of the battery cell 20 by being electrically connected to the battery cell 20, so as to monitor the working status of the battery cell 20.

[0119] With this configuration, at least a portion of the sampling component can be accommodated within the convex structure 111, thereby reducing the spatial impact of the sampling component's arrangement on the receiving cavity 101. More space within the receiving cavity 101 can be used to arrange the battery cells 20, thus effectively increasing the energy density within the receiving cavity 101.

[0120] Please refer to Figure 2 and Figure 4 ,or Figure 5 and Figure 6 In some embodiments, the mounting part 13 has a mounting groove 131 along the depth direction of the outward protrusion structure 111.

[0121] It should be understood that the mounting slot 131 is formed on the mounting portion 13, and fasteners are inserted through the mounting slot 131 to achieve a fixed assembly with the mounting portion 13, thereby realizing the mounting and installation of the battery device 100. Optionally, the number of mounting slots 131 formed on each mounting portion 13 can be any number of one, two, or more. When there are multiple mounting slots 131, the multiple mounting slots 131 can be arranged in any manner; for example, in some embodiments, the multiple mounting slots 131 can be arranged sequentially at intervals along the second direction Y.

[0122] It should be understood that the depth direction of the convex structure 111 refers to the direction in which the convex structure 111 protrudes outward from the receiving cavity 101.

[0123] With this configuration, when the battery device 100 is mounted and assembled through the mounting groove 131 of the mounting part 13, it can be assembled along the depth direction of the protruding structure 111, which is beneficial for the docking assembly of the protruding structure 111. For example, when the battery device 100 is mounted on the bottom of the vehicle, the protruding structure 111 of the battery device 100 docks and assembles with the groove on the bottom of the vehicle to avoid collision.

[0124] Please refer to Figure 2 and Figure 4 In some embodiments, an adhesive area is formed on the side of the first wall near the adjacent mounting portion of the electrode terminal.

[0125] It should be understood that when the electrode terminal 23 is not located at the nearest end of the first wall 21a to the adjacent mounting portion 13, a blank space will be formed on the other side of the first wall 21a where the electrode terminal 23 is near the adjacent mounting portion 13. In this way, an adhesive area 24 can also be provided on the other side of the first wall 21a where the electrode terminal 23 is near the adjacent mounting portion 13 and bonded to the first housing 11.

[0126] With this configuration, when the first wall 21a has a blank space on the other side of the electrode terminal 23 near the adjacent mounting part 13, an adhesive area 24 can also be formed on the other side of the electrode terminal 23 near the adjacent mounting part 13, so as to further increase the bonding area between the first wall 21a and the first housing 11, thereby further improving the connection strength between the battery cell 20 and the first housing 11.

[0127] Please refer to Figures 2 to 4 In some embodiments, the electrode terminal 23 includes a positive terminal 231 and a negative terminal 232. On the same battery cell 20, the distance between the two points on the outer contour of the positive terminal 231 and the outer contour of the negative terminal 232 that are furthest apart along the first direction X is less than or equal to half the dimension of the first wall 21a along the first direction X.

[0128] The positive terminal 231 is used to electrically connect to the positive electrode plate in the electrode assembly 22 inside the housing 21, and the negative terminal 232 is used to electrically connect to the negative electrode plate in the electrode assembly 22 inside the housing 21. External devices can be connected simultaneously using both the positive terminal 231 and the negative terminal 232 to achieve the input or output of electrical energy. It should be understood that the specific positions of the positive terminal 231 and the negative terminal 232 shown in the figure are illustrative, and the positive terminal 231 and the negative terminal 232 can also be set at multiple locations as described above.

[0129] In this embodiment, in the first direction X, the distance between the two points on the outer contours of the positive terminal 231 and the negative terminal 232 that are furthest apart is limited to less than or equal to half the size of the first wall 21a; thus, the positive terminal 231 and the negative terminal 232 are arranged close together on the first wall 21a, and the spacing between the positive terminal 231 and the negative terminal 232 is small. Simultaneously, the spacing between the busbar component 30 for connecting the positive terminals 231 of two adjacent battery cells 20 in the battery cell assembly 210 and the busbar component 30 for connecting the negative terminals 232 of two adjacent battery cells 20 in the battery cell assembly 210 is also small. Therefore, the size of the protruding structure 111 for accommodating the positive terminal 231, the negative terminal 232, and the busbar component 30 in the battery cell assembly 210 is further reduced in the first direction X.

[0130] By limiting the distance between the positive terminal 231 and the negative terminal 232, the positive terminal 231 and the negative terminal 232 are positioned closer together. This allows the use of a smaller protruding structure 111 to accommodate the positive terminal 231 and the negative terminal 232, thereby reducing the impact of the protruding structure 111 on the overall size of the housing 10 and thus reducing the overall size of the battery device 100.

[0131] Please refer to Figures 5 to 8 In some embodiments, a first insulating protective layer (not shown in the figure) is provided on the inner wall surface of the convex structure 111, and the busbar component 30 is bonded to the first insulating protective layer.

[0132] Optionally, the first insulating protective layer can be fixed to the inner wall of the protruding structure 111 by means of bonding, spraying, snap-fit ​​connection, etc.; the first insulating protective layer can be, but is not limited to, an insulating protective film, an insulating coating, or other structures with good insulating performance. The busbar component 30 can be bonded to the first insulating protective layer to form a connection with the protruding structure 111, and the first insulating protective layer can provide insulation separation between the protruding structure 111 and the busbar component 30.

[0133] With this configuration, by providing a first insulating protective layer on the inner wall of the convex structure 111, the creepage distance between the inner wall of the convex structure 111 and the electrode terminal 23 and the bus component 30 can be effectively increased, thereby effectively reducing the probability of short circuit.

[0134] Please refer to Figures 5 to 8 In some embodiments, a second insulating protective layer (not shown in the figure) is provided on the inner wall of the first housing 11, and the adhesive area 24 is bonded to the second insulating protective layer.

[0135] Optionally, the second insulating protective layer can be fixed to the inner wall of the protruding structure 111 by means of bonding, spraying, snap-fit ​​connection, etc.; the second insulating protective layer can be, but is not limited to, an insulating protective film, an insulating coating, or other structures with better insulating performance. The adhesive area 24 can be bonded to the second insulating protective layer to achieve the connection and fixation between the adhesive area 24 and the first housing 11.

[0136] This configuration, by providing a second insulating protective layer on the inner sidewall of the first housing 11, increases the creepage distance between the first housing 11 and the first wall 21a, and provides insulation separation between the first housing 11 and the battery cell 20, thereby reducing the probability of a short circuit between the battery cell 20 and the first housing 11.

[0137] Please refer to Figures 5 to 8 In some embodiments, the battery device 100 further includes an insulating film (not shown) covering at least a portion of the outer casing 21; the insulating film has an opening (not shown) opposite to the adhesive area 24.

[0138] The insulating film can refer to a film layer structure with superior insulation properties. The insulating film covers at least a portion of the outer casing 21 to provide insulation protection for at least a portion of the outer casing 21. Optionally, the insulating film can be fixed to the outer casing 21 by adhesive bonding.

[0139] A clearance opening refers to a through-hole structure formed in the insulating film; the number of clearance openings can be one, two, or more. The clearance opening is positioned opposite to the adhesive area 24, meaning the position of the clearance opening corresponds to the position of the adhesive area 24. The adhesive area 24 can be exposed at the clearance opening, thus allowing the adhesive area 24 to be directly bonded and fixed to the first housing 11 through the clearance opening. Exemplarily, in some embodiments, the size of the clearance opening can be set to be the same as the size of the adhesive area 24, or the clearance opening can be slightly larger than the adhesive area 24, to achieve clearance for the adhesive area 24.

[0140] This configuration uses an insulating film to insulate and separate the casing 21 of the housing 10 and the battery cell 20, while also providing an opening to allow for the adhesive area 24 to pass through, thereby improving the connection strength between the battery cell 20 and the first housing 11.

[0141] Please refer to Figure 5 and Figure 9 In some embodiments, the battery device 100 further includes a connector 40, which is housed in the receiving cavity 101 and connected to the first housing 11 and the second housing 12; in the first direction X, at least one end of the mounting portion 13 is provided with the connector 40 between it and the adjacent battery cell 20.

[0142] Optionally, the connector 40 may be, but is not limited to, a connecting plate, a connecting block, a connecting rod, a connecting rib, or other configurations. The material of the connector 40 may be injection molded material, metal material, alloy material, etc. It should be understood that when the material of the connector 40 is a conductive material, the surface of the connector 40 needs to be insulated, such as by covering with an insulating film or spraying an insulating coating.

[0143] The connector 40 is housed within the receiving cavity 101 and connected to the first housing 11 and the second housing 12. Optionally, the connector 40 can be connected to both the first housing 11 and the second housing 12 simultaneously by means of adhesion, snap-fit ​​connection, or fastener connection. Furthermore, in the first direction X, the connector 40 is disposed between the mounting portion 13 and the adjacent battery cell 20. Thus, the connector 40 is closer to the adjacent mounting portion 13 than the battery cell 20, thereby further shortening the cantilever formed by the connection between the connector 40 and the first housing 11. In other words, the connector 40 can further enhance the connection strength of the housing 10, thereby further improving the overall structural strength of the battery device 100.

[0144] With this configuration, by providing a connector 40 inside the receiving cavity 101, the connector 40 is positioned between the battery cell 20 and the adjacent mounting portion 13, and the connector 40 is used to simultaneously connect the first housing 11 and the second housing 12, thereby enhancing the overall structural strength of the battery device 100.

[0145] The battery device 100 provided in this application will now be further described according to specific embodiments.

[0146] Please refer to Figure 3 , Figures 5 to 8 In this embodiment, the battery device 100 includes a housing 10 and battery cells 20. The housing 10 includes a first housing 11 and a second housing 12. The first housing 11 covers the second housing 12 and forms a receiving cavity 101. The second housing 12 has mounting portions 13 at opposite ends along the first direction X. The mounting portion 13 can be a mounting beam fixed to the outer wall surface of the second housing 12 in the first direction X.

[0147] The battery cell 20 is housed in the receiving cavity 101. The battery cell 20 includes a housing 21 and an electrode terminal 23. The housing 21 includes a first wall 21a near the first housing 11 and a second wall 21b near the second housing 12. The second wall 21b is connected to the second housing 12. The electrode terminal 23 is disposed on the first wall 21a. The first wall 21a is also provided with an adhesive area 24, which is bonded and fixed to the inner side wall of the first housing 11.

[0148] Multiple battery cells 20 are arranged sequentially along a second direction Y to form a battery cell assembly 210. There are two sets of battery cell assemblies 210, and the two sets of battery cell assemblies 210 are arranged sequentially along a first direction X, wherein the first direction X is perpendicular to the second direction Y. The battery device 100 also includes a busbar component 30, which is connected to the electrode terminals 23 of the battery cells 20 arranged sequentially in the battery cell assembly 210.

[0149] In one of the two sets of battery cell assemblies 210, the battery cell assembly 210 located near one of the mounting portions 13 has its electrode terminals 23 of the battery cells 20 disposed at one end of the first wall 21a near the adjacent mounting portion 13, and an adhesive area 24 disposed on the other end of the first wall 21a away from the adjacent mounting portion 13. Similarly, in the other set of two sets of battery cell assemblies 210, the battery cell assembly 210 located near the other mounting portion 13 has its electrode terminals 23 of the battery cells 20 disposed at one end of the first wall 21a near the adjacent mounting portion 13, and an adhesive area 24 disposed on the other end of the first wall 21a away from the adjacent mounting portion 13.

[0150] The first housing 11 is also provided with two protruding structures 111, which are respectively located at opposite ends of the first housing 11 along the first direction X. The two protruding structures 111 respectively accommodate the electrode terminals 23 and the busbar components 30 of the two sets of battery cell assemblies 210, thereby assembling the battery device 100. Furthermore, the busbar components 30 are bonded to the inner wall surface of the accommodated protruding structures 111 to improve the connection stability between the battery cell assemblies 210 and the housing 10. When the battery device 100 is mounted on a power-consuming device via the mounting part 13, since the protruding structures 111 are located on opposite sides of the battery device 100 along the first direction X, the protruding structures 111 occupy less space in the central area of ​​the power-consuming device.

[0151] Please refer to Figure 1 and Figure 2 Secondly, embodiments of this application also provide an electrical device, including a battery device 100 as described above, the battery device 100 being used to provide electrical energy.

[0152] The electrical device provided in this application embodiment is, for example, the vehicle 1000 described above. The vehicle 1000 includes the battery device 100 described above, which is mounted on the bottom of the vehicle 1000 via the mounting part 13 for use. With a more robust battery device 100, the structural stability of the electrical device is also improved.

[0153] 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 The box body includes a first box body and a second box body, wherein the first box body covers the second box body and forms a receiving cavity; the second box body has mounting portions at opposite ends along a first direction; and A battery cell is housed within the receiving cavity. The battery cell includes a housing and electrode terminals. The housing includes a first wall near the first housing and a second wall near the second housing, with the second wall connected to the second housing. The electrode terminals are disposed on the first wall and have a current-collecting component. An adhesive area is also provided on the first wall and is adhered to the first housing. In the battery cell located in the first direction and adjacent to any of the mounting portions, the adhesive area is located on the side of the electrode terminal away from the adjacent mounting portion, and the busbar is connected to the first housing.

2. The battery device of claim 1, wherein: In the battery cell located in the first direction and adjacent to any of the mounting portions, the electrode terminal is disposed at one end of the first wall near the adjacent mounting portion.

3. The battery device of claim 1, wherein: In the second direction, a plurality of battery cells are arranged sequentially to form a battery cell assembly, and the electrode terminals of the plurality of battery cells are electrically connected through the busbar component; wherein, the second direction is perpendicular to the first direction; the first housing is provided with an outward protruding structure, the busbar component and the electrode terminals are housed inside the outward protruding structure, and the busbar component is connected to the inner wall surface of the outward protruding structure.

4. The battery device of claim 3, wherein: The number of battery cell assemblies is at least two sets, and multiple sets of battery cell assemblies are arranged sequentially along the first direction; the number of convex structures is at least one, and the electrode terminals of each battery cell assembly and the connected busbar are respectively housed inside the corresponding convex structure.

5. The battery device of claim 4, wherein: The number of battery cell assemblies is two sets, and the number of protruding structures is two. The electrode terminals of the two sets of battery cell assemblies and the connected busbar components are respectively housed in the corresponding protruding structures.

6. The battery device of claim 5, wherein: In the first direction, the electrode terminals of the battery cells in each group of battery cell assemblies are all disposed at one end of the first wall near the adjacent mounting portion, and the two protruding structures are respectively located at opposite ends of the first housing along the first direction.

7. The battery device according to any one of claims 3 to 6, characterized by: The battery device further includes a sampling component electrically connected to the battery cell; at least a portion of the sampling component is housed within the convex structure.

8. The battery device according to any one of claims 3 to 6, characterized by: The mounting part has an installation groove along the depth direction of the outward convex structure.

9. The battery device according to any one of claims 3 to 6, characterized by: A first insulating protective layer is provided on the inner wall of the convex structure, and the busbar component is bonded to the first insulating protective layer.

10. The battery device of claim 1, wherein: The first wall has the adhesive area formed on the other side of the electrode terminal near the adjacent mounting portion.

11. The battery device according to any one of claims 1 to 6 and 10, characterized by: The electrode terminals include a positive terminal and a negative terminal. On the same battery cell, the distance between the two points on the outer contours of the positive terminal and the negative terminal that are furthest apart along the first direction is less than or equal to half the dimension of the first wall along the first direction.

12. The battery device according to any one of claims 1 to 6 and 10, characterized by: A second insulating protective layer is provided on the inner wall of the first housing, and the adhesive area is bonded to the second insulating protective layer.

13. The battery device according to any one of claims 1 to 6 and 10, characterized by: The battery device further includes an insulating film that covers at least a portion of the outer casing; the insulating film has an opening that is positioned opposite to the adhesive area.

14. The battery device according to any one of claims 1 to 6 and 10, characterized by: The battery device further includes a connector, which is housed within the receiving cavity and connected to the first housing and the second housing; in the first direction, the connector is disposed between at least one end of the mounting portion and the adjacent battery cell.

15. An electrical device, comprising: Includes the battery device as described in any one of claims 1 to 14, the battery device being used to provide electrical energy.

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