Battery device and electric device

Abstract

The application relates to the technical field of battery structure, and provides a battery device and a power utilization device, the battery device comprises a box body and a battery monomer, the box body comprises a first box body, a second box body and a mounting part arranged at opposite ends of the second box body along a first direction, the battery monomer comprises a shell and an electrode terminal, the shell comprises a first wall, and a viscous area is further arranged on the first wall; in the battery monomer adjacent to any mounting part along the first direction, at least part of the viscous area is located on a side of the electrode terminal close to the adjacent mounting part; the battery device provided by the embodiment of the application sets at least part of the viscous area on the side of the electrode terminal close to the adjacent mounting part along the first direction, the cantilever formed when the first wall is bonded with the first box body through the viscous area is shorter, therefore, the connection state of the first wall and the first box body is more stable, and the structural strength of the whole battery device is 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] A battery pack 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 points at opposite ends, such as the bottom of an electric vehicle. To improve the overall structural strength of the battery pack, the tops of the battery cells are typically bonded to the inner wall of the housing. However, when the bonding area between the battery cells and the housing is far from the mounting points, the cantilever formed by the bonding area relative to the mounting points is relatively long, making it easy for the battery cells to detach from the housing, thus weakening the overall structural strength of the battery pack. Utility Model Content

[0004] The purpose of this application is to provide a battery device and an electrical device, which aims to solve the problem that the fixed connection formed by the battery cell being bonded to the inner wall of the top of the box is prone to failure.

[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 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 include 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, which also has an adhesive area. In the battery cells disposed along the first direction and adjacent to any mounting portion, at least a portion of the adhesive area is located on the side of the electrode terminal adjacent to the adjacent mounting portion. The adhesive area is bonded to the first housing.

[0007] The beneficial effects of the embodiments of this application are as follows: The battery device provided in the embodiments of this application achieves a fixed connection between the battery cell and the first housing by providing an adhesive area on the first wall of the battery cell housing and using the adhesive area to bond and fix it to the inner side wall of the first housing; at the same time, in the battery cell located in the first direction and adjacent to any mounting part, at least a portion of the adhesive area is provided on the side of the electrode terminal near the adjacent mounting part along the first direction. Therefore, when the adhesive area on the side of the electrode terminal near the adjacent mounting part is bonded to the first housing, the cantilever formed with the adjacent mounting part is shorter. Thus, the connection state formed by the first wall bonding to the first housing through the adhesive area is more stable, thereby making the structural strength of the entire battery device more stable.

[0008] In some embodiments, in a battery cell located in a first direction and adjacent to any mounting portion, an electrode terminal is disposed at an end of the first wall away from the adjacent mounting portion.

[0009] By adopting the above technical solution, the electrode terminals are positioned away from the adjacent mounting portion along the first direction, so that the adhesive area can be located entirely on the side of the electrode terminals close to the adjacent mounting portion. The cantilever formed by the entire adhesive area being bonded to the first housing is further shortened, thereby further improving the stability of the first wall being bonded and fixed to the first housing through the adhesive area.

[0010] In some embodiments, in a second direction, a plurality of battery cells are arranged sequentially to form a battery cell assembly, and the second direction is perpendicular to the first direction; the battery device further includes a busbar component, and the electrode terminals of each battery cell in the battery cell assembly are electrically connected through the busbar component; a protruding structure is provided on the first housing, and the busbar component and the electrode terminals are housed inside the protruding structure.

[0011] By adopting the above technical solution, an outwardly protruding structure can be set on the first housing to accommodate the electrode terminals and busbar components in the battery cell assembly, thereby eliminating the need to make overall adjustments to the first housing in the direction away from the second housing, and thus improving the space utilization of the accommodating cavity.

[0012] 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.

[0013] 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.

[0014] In some embodiments, the number of battery cell assemblies is two sets, the number of protruding structures is one, and the electrode terminals of the two sets of battery cell assemblies and the connected busbar components are all housed in the same protruding structure.

[0015] By adopting the above technical solution, when there are two sets of battery cell modules, a protruding structure can be set on the first housing to accommodate the electrode terminals and busbar components in the two sets of battery cell modules.

[0016] 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 an end of the first wall away from the adjacent mounting portion.

[0017] By adopting the above technical solution, in the two sets of battery cell assemblies, the electrode terminals of the battery cells are all located at one end of the first wall away from the adjacent mounting portion along the first direction, so that the electrode terminals of the two sets of battery cell assemblies are arranged close together. Therefore, the size of the protruding structure used to accommodate the electrode terminals of the two sets of battery cell assemblies in the first direction is effectively reduced, thereby reducing the increase in the overall volume of the battery device and improving the energy density of the battery device.

[0018] In some embodiments, the number of protruding structures is the same as the number of battery cell assemblies, and the electrode terminals and connected busbars of each battery cell assembly are respectively housed within the corresponding protruding structure.

[0019] By adopting the above technical solution, when there are multiple sets of battery cell modules, the number of protruding structures can be set to be consistent with the number of battery cell modules. The electrode terminals of multiple sets of battery cell modules and the connected busbar components can be respectively housed inside the corresponding protruding structures to further improve the space utilization of the accommodating cavity.

[0020] 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.

[0021] 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.

[0022] In some embodiments, the mounting portion has a mounting groove along the depth direction of the outwardly protruding structure.

[0023] 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.

[0024] In some embodiments, an adhesive area is formed on the side of the electrode terminal opposite to the adjacent mounting portion.

[0025] By adopting the above technical solution, when the first wall has a blank space on the side of the electrode terminal away from the adjacent mounting part, an adhesive area can also be formed on the side of the electrode terminal away from 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.

[0026] In some embodiments, the electrode terminals include a positive terminal and a negative terminal, which are disposed adjacent to each other on the first wall.

[0027] By adopting the above technical solution, the positive and negative terminals are arranged adjacent to each other, and the distance between the positive and negative terminals is smaller. A smaller convex structure can be used to accommodate the positive and negative terminals, thereby reducing the overall size of the battery device.

[0028] In some embodiments, a first insulating protective layer is provided on the inner wall surface of the convex structure.

[0029] 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.

[0030] In some embodiments, the busbar is connected to the first insulating protective layer.

[0031] By adopting the above technical solution, by connecting the busbar component to the first insulating protective layer, the connection points between the battery cell and the first housing can be further improved, thereby enhancing the structural stability between the battery cell and the housing.

[0032] 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.

[0033] 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.

[0034] In some embodiments, the battery device further includes an insulating film covering at least a portion of the housing; the insulating film has a clearance opening facing the adhesive area.

[0035] 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.

[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 structural strength of the battery device is better, the structural stability of the electrical device is also 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 application provides structural schematic diagrams of vehicles for some embodiments;

[0040] Figure 2 An exploded view of a battery device provided for some embodiments of this application;

[0041] Figure 3 This is an exploded view of a battery cell provided in some embodiments of this application;

[0042] Figure 4 This application provides a schematic diagram of the internal structure of a battery device according to some embodiments;

[0043] Figure 5 An exploded view of another battery device provided in some embodiments of this application;

[0044] Figure 6 This is a schematic diagram of the internal structure of another battery device provided in some embodiments of this application;

[0045] Figure 7 An internal cross-sectional view of another battery device provided for some embodiments of this application;

[0046] Figure 8 for Figure 7 A magnified view of part A.

[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;

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

[0054] 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.

[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. They 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. Therefore, they should not be construed as limitations on 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 the battery pack, the top of the individual battery cells is usually bonded to the inner wall of the casing to increase the connection points between the cells and the casing. However, when the bonding area between the battery cells and the casing is far from the mounting section, the battery cells are prone to detaching from the casing due to the longer cantilever formed by the bonding area relative to the mounting section, 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 formed by the battery cell being bonded to the inner wall of the top of the casing is prone to failure, a battery device is designed. In the battery cell that is adjacent to any mounting part in the first direction, at least a portion of the adhesive area on the first wall of the battery cell is located on the side of the electrode terminal closer to the adjacent mounting part. This makes the cantilever formed between the adhesive area and the adjacent mounting part shorter when the adhesive area is bonded to the first casing. Therefore, the connection formed by the first wall being bonded to the first casing through the adhesive area is more stable, and the probability of the adhesive area detaching from the first casing under vibration conditions is effectively reduced, thereby making the structural strength of the entire battery device 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 Figure 2 , Figure 3 and Figure 4 This application provides a battery device 100, including 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 a first direction X. The battery cells 20 are housed in the receiving cavity 101. The battery cells 20 include a shell 201 and electrode terminals 23. The shell 201 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 terminals 23 are disposed on the first wall 21a, and the first wall 21a also has an adhesive area 24. In the battery cells 20 disposed adjacent to any mounting portion 13 along the first direction X, at least a portion of the adhesive area 24 is located on the side of the electrode terminal 23 adjacent to the adjacent mounting portion 13. The adhesive area 24 is bonded 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 3 As 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 parts with good conductivity, such as copper terminals, aluminum terminals, alloy terminals, etc. 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 on the first wall 21a and the first housing 11 is greater than the distance between the electrode terminals 23 on the first wall 21a and the first housing 11; in order to enable 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 on the first wall 21a and the first housing 11; or, a clearance groove can be provided on the inner wall surface of the first housing 11 so that the electrode terminals 23 are accommodated in the clearance groove and the adhesive area 24 on the first wall 21a can abut against the inner wall surface of the first housing 11.

[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, at least a portion of the adhesive area 24 is located on the side of the electrode terminal 23 closest to the adjacent mounting portion 13. Thus, at least a portion of the adhesive area 24 is closer to the adjacent mounting portion 13 than the electrode terminal 23, effectively shortening the cantilever formed by the connection between the adhesive area 24 and the first housing 11, thereby improving the connection stability between the adhesive area 24 and the first housing 11. Optionally, the entire adhesive area 24 can be located entirely on the side of the electrode terminal 23 along the first direction X closest to the adjacent mounting portion 13; or, a portion of the adhesive area 24 can be located on the side of the electrode terminal 23 along the first direction X closest to the adjacent mounting portion 13.

[0089] The electrode terminal 23 can be disposed at any location on the first wall 21a. For example, the electrode terminal 23 can be disposed at the middle of the first wall 21a along the first direction X. In this case, an adhesive area 24 can be provided on the side of the first wall 21a near the adjacent mounting portion 13 where the electrode terminal 23 is located. Simultaneously, an adhesive area 24 can also be provided on the other side of the first wall 21a away from the adjacent mounting portion 13, thereby increasing the connection point between the first wall 21a and the first housing 11 and further improving the connection strength. Alternatively, the electrode terminal 23 can be disposed on the side of the first wall 21a along the first direction X and away from the adjacent mounting portion 13. In this case, the space on the side of the first wall 21a near the adjacent mounting portion 13 where the electrode terminal 23 is located is larger, allowing for a larger area of ​​the adhesive area 24 on this side. This results in a stronger bond between the larger adhesive area 24 and the first housing 11.

[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 set. For example, the adhesive area 24 can be located on either side of the electrode terminal 23.

[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 achieves a fixed connection between the battery cell 20 and the first housing 11 by providing an adhesive area 24 on the first wall 21a of the outer casing 21 of the battery cell 20 and bonding the adhesive area 24 to the inner side wall of the first housing 11. At the same time, in the battery cell 20 located in the first direction X and adjacent to any mounting part 13, at least a portion of the adhesive area 24 is provided on the side of the electrode terminal 23 near the adjacent mounting part 13 along the first direction X. Therefore, when the adhesive area 24 located on the side of the electrode terminal 23 near the adjacent mounting part 13 is bonded to the first housing 11, the cantilever formed with the adjacent mounting part 13 is shorter. As a result, the connection state formed by bonding the first wall 21a to the first housing 11 through the adhesive area 24 is more stable, thereby making the structural strength of the entire battery device 100 more stable.

[0093] Please refer to Figure 3 , Figure 5 and Figure 6In 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 at an end of the first wall 21a away from the adjacent mounting portion 13.

[0094] In this embodiment, the electrode terminal 23 is disposed at one end of the first wall 21a away from the adjacent mounting portion 13 along the first direction X. Thus, the area of ​​the first wall 21a near the adjacent mounting portion 13 of the electrode terminal 23 is larger, and the area of ​​the adhesive region 24 in this area can also be larger. Simultaneously, the adhesive region 24 is entirely located on the side of the electrode terminal 23 near the adjacent mounting portion 13, thereby reducing the impact of the electrode terminal 23 forming a long cantilever on the adhesive region 24.

[0095] With this configuration, the electrode terminal 23 is positioned away from the adjacent mounting portion 13 along the first direction X, allowing the adhesive area 24 to be completely located on the side of the electrode terminal 23 closest to the adjacent mounting portion 13. The cantilever formed by the entire adhesive area 24 bonded to the first housing 11 is further shortened, thus further improving the stability of the first wall 21a bonded and fixed to the first housing 11 through the adhesive area 24. Furthermore, since the area of ​​the first wall 21a on the side of the electrode terminal 23 closest to the adjacent mounting portion 13 is larger, the area of ​​the adhesive area 24 in this area can also be set to be larger, i.e., the connection area between the adhesive area 24 and the first housing 11 is larger, thereby making the connection strength between the first wall 21a and the first housing 11 through the adhesive area 24 stronger.

[0096] Please refer to Figures 2 to 4 In some embodiments, in the second direction, a plurality of battery cells 20 are arranged sequentially to form a battery cell assembly 210, and the second direction Y is perpendicular to the first direction X; the battery device 100 also includes a busbar 30, and the electrode terminals 23 of each battery cell 20 in the battery cell assembly 210 are electrically connected through the busbar 30; the first housing 11 is provided with an outward protrusion structure 111, and the busbar 30 and the electrode terminals 23 are housed inside the outward protrusion 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 may be, but is not limited to, a conductive sheet structure such as an aluminum sheet, iron sheet, copper sheet, silver sheet, or gold sheet; 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 an outwardly protruding structure 111. It should be understood that the outwardly 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 outwardly protruding structure 111 near the second housing 12 will form an inwardly recessed groove structure, meaning the distance from the inner wall surface of the outwardly 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 outwardly protruding structure 111) to the first wall 21a. Therefore, the outwardly 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 space utilization of the accommodating cavity 101 and achieve the purpose of increasing the density of the housing 10.

[0103] Please refer to Figures 2 to 6 In 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 two or more sets of battery cell assemblies 210, one or more protruding structures 111 can be used to accommodate the electrode terminals 23 of multiple sets of battery cell assemblies 210 and the connected busbar components 30, so as to realize the assembly of multiple sets of battery cell assemblies 210 and the connection and assembly operation of battery cells 20 to the first housing 11 through the adhesive area 24 of the first wall 21a.

[0108] Please refer to Figure 3 , Figure 5 and Figure 6 In some embodiments, there are two sets of battery cell assemblies 210 and one convex structure 111. The electrode terminals 23 of the two sets of battery cell assemblies 210 and the connected busbar components 30 are all housed in the same convex structure 111.

[0109] In this embodiment, there are two sets of battery cell assemblies 210. One set of battery cell assemblies 210 is adjacent to one mounting portion 13, and the other set is adjacent to the other mounting portion 13. There is one protruding structure 111, which is used to simultaneously accommodate the electrode terminals 23 and the busbar component 30 of both sets of battery cell assemblies 210.

[0110] Optionally, in one of the two sets of battery cell assemblies 210, the electrode terminals 23 of the battery cells 20 can be disposed at multiple locations on the first wall 21a. For example, the electrode terminals 23 can be disposed on the side of the first wall 21a that is biased towards the adjacent mounting portion 13. In this case, the area of ​​the first wall 21a on the side of the electrode terminals 23 that is closer to the adjacent mounting portion 13 is smaller, and the area of ​​the adhesive area 24 disposed there is also smaller. At the same time, since the electrode terminals 23 are closer to the adjacent mounting portion 13, the distance between the electrode terminals 23 of the two sets of battery cell assemblies 210 is larger. Therefore, a larger outwardly protruding structure 111 in the first direction X is needed to simultaneously accommodate the electrode terminals 23 of the two sets of battery cell assemblies 210 and the busbar component 30.

[0111] Alternatively, the electrode terminal 23 can be located at the center of the first wall 21a along the first direction X. In this case, the adhesive area 24 can be provided on the side of the first wall 21a that is biased towards the adjacent mounting part 13 along the first direction X. At the same time, since the electrode terminal 23 is located at the center of the first wall 21a along the first direction X, the protruding structure 111 needs to cover the central area of ​​the first wall 21a of the battery cell 20 in the two sets of battery cell assemblies 210, so as to simultaneously accommodate the electrode terminal 23 and the busbar component 30 of the two sets of battery cell assemblies 210.

[0112] Alternatively, the electrode terminal 23 can be located on the side of the first wall 21a away from the adjacent mounting portion 13. In this case, the area of ​​the first wall 21a on the side of the electrode terminal 23 closer to the adjacent mounting portion 13 is larger, and the area of ​​the adhesive area 24 provided here can also be set to be larger. At the same time, since the electrode terminal 23 is located on the side of the first wall 21a away from the adjacent mounting portion 13, the distance between the electrode terminals 23 of the two sets of battery cell assemblies 210 is smaller. Therefore, the dimensions of the outer protruding structure 111 of the two sets of battery cell assemblies 210 and the busbar component 30 along the first direction X can be set to be smaller.

[0113] Alternatively, the electrode terminal 23 can be located at the end of the first wall 21a away from the adjacent mounting portion 13. In this case, the area of ​​the first wall 21a on the side of the electrode terminal 23 closer to the adjacent mounting portion 13 is larger, so the area of ​​the adhesive area 24 provided here can be larger. At the same time, when the two sets of battery cell assemblies 210 are arranged sequentially along the first direction X, the electrode terminals 23 of the two sets of battery cell assemblies 210 are arranged close together, and the dimensions of the protruding structure 111 for accommodating the electrode terminals 23 of the two sets of battery cell assemblies 210 and the busbar 30 along the first direction X can be set to be smaller.

[0114] With this configuration, when there are two sets of battery cell assemblies 210, a protruding structure 111 can be provided on the first housing 11 to accommodate the electrode terminals 23 and the busbar components 30 in the two sets of battery cell assemblies 210.

[0115] Please refer to Figure 3 , 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 away from the adjacent mounting portion 13.

[0116] 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 away from the adjacent mounting portion 13. As a result, the space of the first wall 21a at the other end of the electrode terminal 23 near the adjacent mounting portion 13 is larger, and the area of ​​the adhesive area 24 can be set to be larger.

[0117] Meanwhile, when there are two sets of battery cell assemblies 210, the electrode terminals 23 of the two sets of battery cell assemblies 210 will converge at the center of the receiving cavity 101 along the first direction X, as shown. Figure 5 and Figure 8 As shown.

[0118] With this configuration, the electrode terminals 23 of the two sets of battery cell assemblies 210 are arranged close together. Therefore, the size of the protruding structure 111 of the electrode terminals 23 of the two sets of battery cell assemblies 210 in the first direction X is effectively reduced, thereby reducing the increase in the overall volume of the battery device 100 and improving the energy density of the battery device 100.

[0119] Please refer to Figure 2 and Figure 4 In some embodiments, the number of protruding structures 111 is the same as the number of battery cell assemblies 210, and the electrode terminals 23 of each battery cell assembly 210 and the connected busbar 30 are respectively housed in the corresponding protruding structure 111.

[0120] In this embodiment, the number of battery cell assemblies 210 can be consistent with the number of protruding structures 111. For example, when the number of battery cell assemblies 210 is any one of two, three, or more groups, the number of protruding structures 111 is also any one of two, three, or more groups.

[0121] With this configuration, each battery cell assembly 210 can house its respective electrode terminal 23 and connected busbar 30 within a corresponding protruding structure 111.

[0122] Please refer to Figure 7 and Figure 8 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] Please refer to Figure 2 and Figure 4 In some embodiments, the first wall 21a has an adhesive area 24 formed on the side of the electrode terminal 23 opposite to the adjacent mounting portion 13.

[0130] It should be understood that when the electrode terminal 23 is not located at the farthest end of the first wall 21a away from the adjacent mounting portion 13, a blank space will be formed on the other side of the first wall 21a away from 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 away from the adjacent mounting portion 13 and bonded to the first housing 11.

[0131] With this configuration, when the first wall 21a has a blank space on the side of the electrode terminal 23 away from the adjacent mounting portion 13, an adhesive area 24 can also be formed on the side of the electrode terminal 23 away from the adjacent mounting portion 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.

[0132] Please refer to Figure 3 , Figure 5 and Figure 6 In some embodiments, the electrode terminal 23 includes a positive terminal 231 and a negative terminal 232, which are disposed adjacent to the first wall 21a.

[0133] 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.

[0134] Compared to the positive terminal 231 and negative terminal 232 being respectively disposed at opposite ends of the first wall 21a along the first direction X, the time interval between the adjacent positive terminal 231 and negative terminal 232 is smaller; at the same time, the spacing between the busbar component 30 for connecting the positive terminal 231 of two adjacent battery cells 20 in the battery cell assembly 210 and the negative terminal 232 for connecting two adjacent battery cells 20 in the battery cell assembly 210 is also smaller. As a result, the size of the protruding structure 111 for accommodating the positive terminal 231, negative terminal 232 and busbar component 30 in the battery cell assembly 210 in the first direction X can be further reduced.

[0135] With this configuration, by placing the positive terminal 231 and the negative terminal 232 adjacent to each other, the distance between the positive terminal 231 and the negative terminal 232 is smaller. A smaller convex structure 111 can be used to accommodate the positive terminal 231 and the negative terminal 232, thereby reducing the impact of the convex structure 111 on the overall size of the housing 10, and thus reducing the overall size of the battery device 100.

[0136] Please refer to Figure 3 , Figure 5 and Figure 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.

[0137] Optionally, the first insulating protective layer can be fixed to the inner wall of the convex 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 better insulating performance.

[0138] 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.

[0139] Please refer to Figure 3 , Figure 5 and Figure 8In some embodiments, the busbar component 30 is bonded to the first insulating protective layer.

[0140] Optionally, the busbar component 30 can be fixedly connected to the first insulating protective layer by means of adhesive, snap-fit ​​connection, or other methods. For example, in some embodiments, the busbar component 30 can be bonded and fixed to the first insulating protective layer by adhesive, thereby realizing the connection and fixation between the busbar component 30 and the protruding structure 111 of the first housing 11.

[0141] By connecting the busbar component 30 to the first insulating protective layer, this configuration can further improve the connection points between the battery cell 20 and the first housing 11, thereby enhancing the structural stability between the battery cell 20 and the housing 10.

[0142] Please refer to Figure 3 , Figure 5 and Figure 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.

[0143] 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.

[0144] 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.

[0145] 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 housing 21; the insulating film has a clearance opening (not shown) facing the adhesive area 24.

[0146] 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.

[0147] A clearance opening refers to a through-hole structure formed on the insulating film; the number of clearance openings can be one, two, or more. The clearance opening faces the adhesive area 24, thereby 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, in order to achieve clearance from the adhesive area 24.

[0148] 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.

[0149] The battery device 100 provided in this application will now be further described according to specific embodiments.

[0150] 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.

[0151] 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 21b near the second housing 12. The second wall 21b is connected to the second housing 12. The electrode terminals 23 are disposed on the first wall 21a. The first wall 21a is also provided with an adhesive area 24. The adhesive area 24 is bonded and fixed to the inner side wall of the first housing 11. The second wall 21b is fixedly connected to the inner wall surface of the second housing 12.

[0152] 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.

[0153] 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 away from the adjacent mounting portion 13, while the adhesive area 24 is disposed on the other end of the first wall 21a near the electrode terminals 23 of the adjacent mounting portion 13. Similarly, in the other set of battery cell assemblies 210 located near the other mounting portion 13, the electrode terminals 23 of the battery cells 20 are disposed at one end of the first wall 21a away from the adjacent mounting portion 13, while the adhesive area 24 is disposed on the other end of the first wall 21a near the electrode terminals 23 of the adjacent mounting portion 13. Therefore, when the two sets of battery cell assemblies 210 are arranged sequentially along the first direction X, the electrode terminals 23 of the two sets of battery cell assemblies 210 are positioned close together.

[0154] The first housing 11 is also provided with an outward protrusion structure 111. There is one outward protrusion structure 111. The outward protrusion structure 111 is used to accommodate the electrode terminals 23 and the current collector 30 in the two sets of battery cell assemblies 210, so as to realize the assembly of the battery device 100.

[0155] Please refer to Figure 1 and Figure 5 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.

[0156] 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.

[0157] 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 enclosure includes a first enclosure and a second enclosure, the first enclosure covering the second enclosure and forming a receiving cavity, and the second enclosure having 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, which also has an adhesive area. In the battery cell located in the first direction and adjacent to any of the mounting portions, at least a portion of the adhesive area is located on the side of the electrode terminal near the adjacent mounting portion; the adhesive area is bonded to the first housing.

2. The battery device according to claim 1, characterized in that: In the battery cell located in the first direction and adjacent to any of the mounting portions, the electrode terminal is disposed at an end of the first wall away from the adjacent mounting portion.

3. The battery device according to claim 1, characterized in that: In a second direction, a plurality of battery cells are arranged sequentially to form a battery cell assembly, the second direction being perpendicular to the first direction; the battery device further includes a busbar component, and the electrode terminals of each battery cell in the battery cell assembly are electrically connected through the busbar component; the first housing is provided with an outward protruding structure, and the busbar component and the electrode terminals are housed inside the outward protruding structure.

4. The battery device according to claim 3, characterized in that: 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 according to claim 4, characterized in that: The number of battery cell assemblies is two sets, and the number of the protruding structure is one. The electrode terminals of the two sets of battery cell assemblies and the connected busbar components are all housed in the same protruding structure.

6. The battery device according to claim 5, characterized in that: In the first direction, the electrode terminals of the battery cells in each group of battery cell assemblies are all disposed at an end of the first wall away from the adjacent mounting portion.

7. The battery device according to claim 5, characterized in that: The number of the protruding structures is the same as the number of the battery cell assembly, and the electrode terminals and the connected busbar components of each battery cell assembly are respectively housed in the corresponding protruding structures.

8. The battery device according to any one of claims 3 to 7, characterized in that: 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.

9. The battery device according to any one of claims 3 to 7, characterized in that: The mounting part has an installation groove along the depth direction of the outward convex structure.

10. The battery device according to any one of claims 1 to 7, characterized in that: The first wall has the adhesive area formed on the side of the electrode terminal opposite to the adjacent mounting portion.

11. The battery device according to any one of claims 1 to 7, characterized in that: The electrode terminal includes a positive terminal and a negative terminal, which are disposed adjacent to each other on the first wall.

12. The battery device according to any one of claims 3 to 7, characterized in that: A first insulating protective layer is provided on the inner wall surface of the convex structure.

13. The battery device according to claim 12, characterized in that: The busbar component is connected to the first insulating protective layer.

14. The battery device according to any one of claims 1 to 7, characterized in that: 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.

15. The battery device according to any one of claims 1 to 7, characterized in that: The battery device further includes an insulating film that covers at least a portion of the outer casing; the insulating film has a clearance opening facing the adhesive area.

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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