Battery device and electric device

Abstract

Provided in the present application are a battery device (100) and an electric device. Beam structures (101) are respectively provided at two opposite ends of a case (10) of the battery device (100) in a first direction (X); a reinforcing member (30) extends in the first direction (X), two ends of the reinforcing member (30) are respectively connected to the two beam structures (101), and the reinforcing member (30) is arranged between two adjacent battery cell assemblies (110); a first protective member (40) is connected to the reinforcing member (30) and the battery cell assemblies (110); the reinforcing member (30) and adjacent current collecting components (50) are separately arranged on two opposite sides of the first protective member (40); and in a second direction (Y), the projections of the current collecting components (50) are located on the first protective member (40). The battery device (100) provided in the embodiments of the present application can not only use the reinforcing member (30) to improve the overall structural strength of the case (10) and the battery device (100), but can also use the first protective member (40) to increase a creeping distance between two adjacent current collecting components (50).

Description

Battery devices and electrical appliances

[0001] This application claims priority to Chinese Patent Application No. 202411440897.X, entitled “Battery Device and Power Consumption Device”, filed on October 15, 2024, which is incorporated herein by reference in its entirety. Technical Field

[0002] This application relates to the field of battery device technology, and in particular to a battery device and an electrical device. Background Technology

[0003] A battery pack includes a housing and battery cells housed within it. In related technologies, to increase the energy density of the battery pack, i.e., to increase the density of the battery cells, the number of beams within the housing is typically reduced to save internal space and accommodate more battery cells. However, reducing the number of beams weakens the structural strength of the housing, affecting the overall structural strength and stability of the battery pack, and also posing a risk of short circuits and arcing to the busbars between adjacent battery cells.

[0004] Application content

[0005] The purpose of this application is to provide a battery device and an electrical device, which aims to solve the problems of weak stability of battery devices in related technologies and the risk of short circuits and arcing in adjacent internal busbar components.

[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, battery cell assemblies, a reinforcing member, and a first protective member. The housing has beam structures at opposite ends in a first direction. The battery cell assemblies are housed within the housing and located between the two beam structures. The battery cell assemblies are arranged in at least two groups along a second direction, each group of battery cell assemblies being electrically connected to a busbar. The first direction is perpendicular to the second direction. The reinforcing member extends along the first direction, and its two ends along the first direction are respectively connected to the two beam structures. The reinforcing member is disposed between two adjacent groups of battery cell assemblies. The first protective member is connected to the reinforcing member and the battery cell assemblies, and the reinforcing member and adjacent busbars are separated on opposite sides of the first protective member. In the second direction, the projection of the busbar is located on the first protective member.

[0008] The beneficial effects of the embodiments of this application are as follows: The battery device provided in this application embodiment can accommodate a battery cell assembly between the beam structures at opposite ends of the housing. Simultaneously, the two beam structures are connected at opposite ends by a reinforcing member, and the reinforcing member is connected to the battery cell assembly via a first protective member. Therefore, the reinforcing member can connect the beam structure and the battery cell assembly to improve the overall structural strength of the battery device, while having minimal impact on the arrangement of the battery cell assembly. Furthermore, the first protective member can separate the reinforcing member from the battery cell assembly, reducing the probability of short circuits caused by the reinforcing member, and the first protective member can also separate adjacent beam structures. By separating the current collector components, the creepage distance between the current collector components of two adjacent battery cell modules can be effectively increased, thereby effectively reducing the probability of short circuit arcing in the current collector components of the two battery cell modules. Therefore, the battery device provided in this application embodiment can improve the overall structural strength of the housing and battery device by using the reinforcing member to improve the stability of the battery device, and has a low impact on the energy density of the battery device. At the same time, the first protective member can also separate adjacent current collector components to increase the creepage distance between adjacent current collector components and reduce the probability of short circuit arcing between adjacent current collector components.

[0009] In some embodiments, the battery cell assembly includes a plurality of battery cells arranged sequentially along a first direction. Each battery cell includes a housing and electrode terminals disposed on the housing. A busbar is electrically connected to the electrode terminals, and a first protective member is simultaneously connected to the housings of two adjacent battery cell assemblies.

[0010] By adopting the above technical solution, the first protective component can be connected to the battery cells in two adjacent battery cell assemblies at the same time, so that the reinforcing component can be connected to the outer shell of two adjacent battery cell assemblies at the same time through the first protective component, thereby further improving the overall structural strength of the casing and battery device.

[0011] In some embodiments, in the third direction, the first protective member extends beyond the range of the busbar component, and a gap is formed between the first protective member and the inner wall surface of the housing; wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0012] By adopting the above technical solution, the first protective component can separate the current-carrying components on both sides and further improve the creepage distance, and the first protective component forms a gap between the inner wall surface of the enclosure to reduce the probability of assembly interference.

[0013] In some embodiments, in the third-party direction, the first protective member extends beyond the busbar by a dimension H, where 0 ≤ H ≤ 5 mm.

[0014] By adopting the above technical solution, by limiting the dimension H of the first protective component beyond the busbar component to be greater than or equal to 0 and less than or equal to 5 mm, the first protective component can separate the busbar components on both sides to reduce the probability of short circuit.

[0015] In some embodiments, 1mm ≤ H ≤ 4mm.

[0016] By adopting the above technical solution, by further limiting the size H of the first protective component beyond the busbar component to greater than or equal to 1 mm and less than or equal to 4 mm, the first protective component can effectively improve the creepage distance between the busbar components on both sides, and the first protective component has a low impact on assembly.

[0017] In some embodiments, the first protective member is provided with a receiving groove, and the reinforcing member is fixedly disposed in the receiving groove.

[0018] By adopting the above technical solution, the reinforcing member can be connected to the first protective member by being fixed in the receiving groove, and the first protective member can provide semi-enclosed protection for the reinforcing member.

[0019] In some embodiments, the first protective member includes a first protective portion and two second protective portions disposed on the first protective portion. The first protective portion is connected to the side surface of the housing where the electrode terminals are disposed. The two second protective portions are respectively connected to both sides of the first protective portion along the second direction and together with the first protective portion form a receiving groove. The reinforcing member is inserted into the receiving groove. In the second direction, the projection of the reinforcing member and the projection of the busbar component are both located on the second protective portion.

[0020] By adopting the above technical solution, the reinforcing member can be inserted into the receiving groove formed by the first protective part and the two second protective parts, and the second protective part can separate the reinforcing member and the current-carrying component to effectively improve the creepage distance between the reinforcing member and the current-carrying component; at the same time, the reinforcing member is connected to the outer shell through the first protective part, thereby effectively improving the overall structural strength of the battery device.

[0021] In some embodiments, a receiving cavity is provided in the first protective member, and a reinforcing member is fixedly disposed in the receiving cavity.

[0022] By adopting the above technical solution, the reinforcing member is fixedly installed in the receiving cavity, and the first protective member can protect the reinforcing member by covering it, so as to reduce the probability of short circuit between the reinforcing member and the busbar component.

[0023] In some embodiments, a second protective member is provided on the busbar component, the second protective member covering at least a portion of the busbar component; a third protective member is also provided on the first protective member, the third protective member being located on the side of the busbar component facing away from the electrode terminals, and the side of the third protective member facing the busbar component being connected to the second protective member.

[0024] By adopting the above technical solution, the second protective component covers the busbar component to improve its insulation protection capability, while the third protective component is connected to the second protective component to improve the stability of the second protective component, which can effectively reduce the probability of the second protective component being blown off due to airflow caused by thermal runaway.

[0025] In some embodiments, in the third direction, the third protective member and at least a portion of the second protective member overlap, and the overlapping portion of the third protective member and at least a portion of the second protective member has a dimension M in the second direction, and the second protective member has a dimension N in the second direction, wherein 1 mm ≤ M ≤ N.

[0026] By adopting the above technical solution, the third protective member and the second protective member can overlap, and the overlap distance M between the end side of the third protective member away from the first protective member and the end side of the connected second protective member facing the first protective member is limited to greater than or equal to 1 mm and less than or equal to the dimension N of the second protective member in the second direction, so that the third protective member can form a better fixing effect on the second protective member.

[0027] In some embodiments, the surface of the reinforcing member is provided with an insulating protective layer.

[0028] By adopting the above technical solution, the insulation protection capability of the reinforcing component is improved by utilizing the insulating protective layer.

[0029] In some embodiments, a heat insulation layer is provided between at least two sets of adjacent battery cell assemblies.

[0030] By adopting the above technical solution, the heat insulation layer is used to separate adjacent battery cell modules, thereby reducing the probability of mutual heat conduction between adjacent battery cell modules and thus reducing the probability of thermal runaway propagation.

[0031] Secondly, embodiments of this application also provide an electrical device, including the battery device as described above, which is used to provide electrical energy.

[0032] 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 stability of the battery device is superior, the stability of the electrical device is also superior. Attached Figure Description

[0033] 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.

[0034] Figure 1 is a structural schematic diagram of the vehicle provided in an embodiment of this application;

[0035] Figure 2 is an exploded view of the battery device provided in an embodiment of this application;

[0036] Figure 3 is an exploded structural diagram of a battery cell provided in an embodiment of this application;

[0037] Figure 4 is a schematic diagram of the battery cell assembly provided in the embodiment of this application housed in the housing;

[0038] Figure 5 is a schematic diagram of the arrangement structure of the battery cell assembly provided in the embodiment of this application;

[0039] Figure 6 is a schematic diagram of the connection structure between the first type of battery cell assembly, the reinforcing member, and the first protective member provided in the embodiment of this application;

[0040] Figure 7 is a magnified view of part A in Figure 6;

[0041] Figure 8 is a schematic diagram of the connection structure between the second type of battery cell assembly and the reinforcing member and the first protective member provided in the embodiment of this application;

[0042] Figure 9 is a magnified view of part B in Figure 8;

[0043] Figure 10 is a schematic diagram of the connection structure between the third type of battery cell assembly and the reinforcing member and the first protective member provided in the embodiment of this application;

[0044] Figure 11 is a magnified view of part C in Figure 10.

[0045] In the figures, the following labels are used: 1000, vehicle; 100, battery device; 110, battery cell assembly; 200, controller; 300, motor; 10, housing; 101, beam structure; 11, first housing; 12, second housing; 20, battery cell; 210, outer casing; 21, end cap; 21a, electrode terminal; 22, housing; 23, electrode assembly; 23a, tab; 30, reinforcing member; 40, first protective member; 401, receiving groove; 402, receiving cavity; 41, first protective part; 42, second protective part; 50, busbar component; 60, second protective member; 70, third protective member; 80, heat insulation layer; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] A battery device includes a housing and battery cells housed within the housing. In related technologies, to increase the energy density of the battery device, i.e., to increase the density of the battery cells, a common approach is to reduce the number of beams within the housing to save internal space and accommodate more battery cells. However, reducing the number of beams weakens the structural strength of the housing, thus affecting the overall structural strength and stability of the battery device.

[0052] Based on the above considerations, in order to address the problem that reducing the number of beams within the casing in related technologies to save space leads to a weakening of the overall structural strength of the battery device, a new battery device is designed. This design incorporates individual battery cells between beams at opposite ends of the battery device in a first direction, providing ample space for their arrangement. Furthermore, reinforcing members connect the beams at both ends, and these reinforcing members are connected to the individual battery cells via a first protective member. This connection between the reinforcing members and both the individual battery cells and the beams effectively enhances the overall structural strength of the battery device. Simultaneously, the reinforcing members have minimal impact on the arrangement of the individual battery cells, and the first protective member effectively separates the reinforcing members from the individual battery cells, reducing the probability of short circuits caused by the reinforcing members. Therefore, the stability of the battery device is effectively improved while minimizing its impact on energy density.

[0053] 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.

[0054] 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.

[0055] Please refer to Figure 1, which is a structural schematic diagram 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 installed 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 startup, navigation, and driving.

[0056] 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.

[0057] Please refer to Figure 2, which 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 110 for providing voltage and capacity. The battery cell assembly 110 may include multiple battery cells 20, which are connected in series, parallel, or mixed connection through a busbar.

[0058] In some embodiments, the battery cell assembly 110 is typically formed by rows of multiple battery cells 20.

[0059] As an example, the battery cell assembly 110 can be a battery module, which is formed by arranging and fixing multiple battery cells 20 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0060] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 110, the battery cell assemblies 110 being housed in the housing 10.

[0061] As an example, the battery cell assembly 110 can be a battery module, and the battery cell assembly 110 can be housed in the housing 10 by fixing the battery module in the housing 10.

[0062] As an example, the battery cell assembly 110 can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0063] 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 110. 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.

[0064] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms an enclosed space to house the battery cell assembly 110.

[0065] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0066] 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.

[0067] 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 being discharged by recharging to activate the active materials.

[0068] 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.

[0069] Please refer to Figure 3, which is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. A battery cell 20 refers to the smallest unit constituting a battery device 100. As shown in Figure 3, the battery cell 20 includes a housing 210, electrode assemblies 23, and other functional components.

[0070] The outer casing 210 includes an end cap 21 and a housing 22, the housing 22 having an opening. The end cap 21 is a component that closes onto the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 21 can be adapted to the shape of the housing 22 to fit it. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 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 21a can be provided on the end cap 21. The electrode terminals 21a (e.g., positive and negative terminals) can be used to electrically connect to the electrode assembly 23 for outputting or inputting electrical energy into the battery cell 20. In some embodiments, the end cap 21 can 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 21 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 21. The insulating element can be used to isolate the electrical connection components inside the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element can be plastic, rubber, etc.

[0071] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The housing 22 can be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0072] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0073] According to some embodiments of this application, referring to Figures 2, 4 to 7, this application provides a battery device 100, including a housing 10, a battery cell assembly 110, a reinforcing member 30, and a first protective member 40. The housing 10 has beam structures 101 at opposite ends in a first direction X. The battery cell assembly 110 is housed within the housing 10 and located between two beam structures 101. The battery cell assemblies 110 are arranged in at least two groups along a second direction Y, and each group of battery cell assemblies 110 is powered on. A current-collecting component 50 is connected, wherein the first direction X is perpendicular to the second direction Y; a reinforcing member 30 extends along the first direction X, and the two ends of the reinforcing member 30 along the first direction X are respectively connected to two beam structures 101, and the reinforcing member 30 is disposed between two adjacent sets of battery cell assemblies 110; a first protective member 40 is connected to the reinforcing member 30 and the battery cell assembly 110, and the reinforcing member 30 and the adjacent current-collecting component 50 are separated on opposite sides of the first protective member 40; in the second direction Y, the projection of the current-collecting component 50 is located on the first protective member 40.

[0074] The first direction X can be any direction; for example, the first direction X can be, but is not limited to, the length direction of the box 10, the width direction of the box 10, etc.

[0075] The housing 10 has beam structures 101 at its opposite ends in the first direction X; understandably, the beam structures 101 at both ends can form an internal accommodating space for accommodating the battery cell assembly 110. Optionally, the beam structure 101 may be, but is not limited to, a roll-formed beam, a profile beam, etc.

[0076] The number of battery cell modules 110 can be any number of groups, such as two, three or more; multiple groups of battery cell modules 110 are arranged along the second direction Y in the area between the two beam structures 101.

[0077] The second direction Y can be any direction, such as the length or width direction of the housing 10. For example, in some embodiments, the second direction Y can be the width direction of the housing 10, and the first direction X corresponds to the length direction of the housing 10; the battery cells 20 in the battery cell assembly 110 are arranged sequentially along the length direction of the housing 10, and multiple sets of battery cell assemblies 110 are arranged along the width direction of the housing 10.

[0078] The busbar component 50 can 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 50 is used to electrically connect different battery cells 20 within the battery cell assembly 110, enabling the battery cells 20 in the battery cell assembly 110 to form an electrical connection through series and / or parallel connections. Simultaneously, the busbar component 50 can also connect battery cells 20 in two adjacent sets of battery cell assemblies 110 to achieve electrical connection between adjacent sets of battery cell assemblies 110.

[0079] For example, in some embodiments, the length direction of the busbar 50 can be arranged along the first direction X, so that two battery cells 20 in a group of battery cell assemblies 110 can be connected simultaneously using one busbar 50. At the same time, the busbars 50 of two adjacent groups of battery cell assemblies 110 can be connected and made conductive using electrical connection structures (such as copper sheets, aluminum sheets, etc.).

[0080] The reinforcing member 30 is used to connect the beam structure 101 to achieve structural reinforcement. Optionally, the reinforcing member 30 may include, but is not limited to, a strip, a stiffener, or a reinforcing beam. The material of the reinforcing member 30 may be a rigid composite material (e.g., steel-aluminum composite, copper-aluminum composite, etc.) or a rigid metal (e.g., steel, aluminum). The two opposite ends of the reinforcing member 30 are respectively connected to the beam structure 101. The reinforcing member 30 may be fastened to the beam structure 101 by fasteners (e.g., bolts, screws, etc.), or it may be fixed to the beam structure 101 by adhesive (e.g., structural adhesive).

[0081] Among them, the two ends of the reinforcing member 30 along the first direction can be connected to the two beam structures 101 respectively, so as to realize the overall connection of the beam structure 101, the reinforcing member 30 and the battery cell assembly 110 of the box 10, thereby improving the overall structural strength of the battery device 100.

[0082] The reinforcing member 30 extends along the first direction X, meaning that the length direction of the reinforcing member 30 is arranged along the first direction X. Optionally, the reinforcing member 30 can be disposed on the side of the battery cell assembly 110 facing away from the connecting housing 10. Thus, the reinforcing member 30 is located on one side of the battery cell assembly 110 and does not occupy the arrangement space of the battery cell assembly 110. The reinforcing member 30 has little impact on the arrangement of the battery cell assembly 110, meaning that the reinforcing member 30 has a low impact on the energy density of the battery device 100.

[0083] Meanwhile, the reinforcing member 30 is arranged between two adjacent sets of battery cell modules 110, that is, each pair of adjacent sets of battery cell modules 110 only needs one reinforcing member 30 for connection, thereby reducing the number of reinforcing members 30 and reducing the weight and cost of the electrical device.

[0084] The first protective component 40 is used to provide insulation protection for the reinforcing component 30. Optionally, the first protective component 40 can be made of high-temperature resistant insulating material, such as polyurethane fiber, polyimide, silicone, fluoroplastic, ceramic material, etc.

[0085] The first protective member 40 can wrap around and protect the reinforcing member 30. For example, the interior of the first protective member 40 forms a protective cavity, and at least a portion of the reinforcing member 30 can be inserted into the protective cavity; or, the first protective member 40 can provide semi-enclosed protection for the reinforcing member 30. For example, the first protective member 40 is recessed to form a receiving groove, and the reinforcing member 30 is inserted into the receiving groove, so that the first protective member 40 can separate the reinforcing member 30 from the battery cell assembly 110.

[0086] The first protective component 40 can be fixedly connected to the reinforcing component 30 by adhesive materials such as double-sided tape and structural adhesive; at the same time, the first protective component 40 can be fixedly connected to the battery cell assembly 110 by adhesive materials such as double-sided tape and structural adhesive (for example, fixedly connected to the end cap 21 of the battery cell 20 in the battery cell assembly 110).

[0087] Therefore, the first protective component 40 can be connected to both the battery cell assembly 110 and the reinforcing component 30. That is, the reinforcing component 30 is connected to the battery cell assembly 110 through the first protective component 40, and the reinforcing component 30 is also connected to the beam structure 101 of the housing 10. Thus, the overall structural strength of the battery device 100 is effectively improved, and the stability of the battery device 100 is also effectively improved.

[0088] The reinforcing member 30 is arranged between two adjacent sets of battery cell assemblies 110. Thus, the first protective member 40 connected to the reinforcing member 30 is also located between two adjacent sets of battery cell assemblies 110. The first protective member 40 will also be located between two busbars 50 of two adjacent sets of battery cell assemblies 110.

[0089] In the second direction Y, the projection of the busbar 50 is located on the first protective member 40; thus, in the second direction Y, the first protective member 40 can separate the busbars 50 on both sides, that is, the first protective member 40 can increase the creepage distance between the two adjacent busbars 50.

[0090] It should be understood that since two adjacent sets of battery cell modules 110 are arranged sequentially in the second direction Y, the spacing between the two busbars 50 of two adjacent sets of battery cell modules 110 is small, and there may be a risk of short circuit and arcing between the two adjacent busbars 50. By using the first protective member 40 to separate the two adjacent busbars 50, the creepage distance between the two busbars 50 can be effectively increased, thereby reducing the probability of short circuit and arcing.

[0091] The battery device 100 provided in this application embodiment can accommodate a battery cell assembly 110 between beam structures 101 at opposite ends of a housing 10. Simultaneously, two beam structures 101 are connected at both ends by a reinforcing member 30, and the reinforcing member 30 is connected to the battery cell assembly 110 via a first protective member 40. Thus, the reinforcing member 30 can form a connection with both the beam structures 101 and the battery cell assembly 110 to improve the overall structural strength of the housing 10 and the battery device 100, while having a minimal impact on the arrangement of the battery cell assembly 110. Furthermore, the first protective member 40 can separate the reinforcing member 30 from the battery cell assembly 110, reducing the probability of short circuits caused by the reinforcing member 30. The first protective member 40 can also separate two adjacent busbar components 50, effectively increasing the creepage distance between the busbar components 50 of two adjacent battery cell assemblies 110, thereby effectively reducing the probability of short circuits and arcing in the busbar components 50 of the two battery cell assemblies 110. Therefore, the battery device 100 provided in this application embodiment can improve the overall structural strength of the housing 10 and the battery device 100 by using the reinforcing member 30, thereby improving the stability of the battery device 100, and has a low impact on the energy density of the battery device 100. At the same time, the first protective member 40 can also separate adjacent busbar components 50 to increase the creepage distance between two adjacent busbar components 50 and reduce the probability of short circuit arcing between adjacent busbar components 50.

[0092] Referring to Figures 2, 4 to 7, in some embodiments, the battery cell assembly 110 includes a plurality of battery cells 20 arranged sequentially along the first direction X. Each battery cell 20 includes a housing 210 and an electrode terminal 21a disposed on the housing. A busbar 50 is electrically connected to the electrode terminal 21a. A first protective member 40 is simultaneously connected to the housing 210 of two adjacent sets of battery cell assemblies 110.

[0093] Electrode terminal 21a is a functional component disposed on housing 210. Electrode terminal 21a is used to connect to electrode assembly 23 inside housing 210 so that electrode terminal 21a can output or input electrical energy. It should be understood that the number of electrode terminals 21a is generally two, that is, including a positive terminal and a negative terminal, so as to form a current loop.

[0094] For example, in some embodiments, the battery cells 20 in the battery cell assembly 110 are arranged sequentially along the first direction X. Thus, the two electrode terminals 21a provided on the housings 210 of the multiple battery cells 20 are also arranged in two columns along the first direction X. The busbar 50 can be arranged along the first direction X in its length direction, so one column of electrode terminals 21a can be connected simultaneously using one busbar 50. Furthermore, an electrical connection structure can be used to connect and conduct electricity between two adjacent columns of busbars 50 connected to electrode terminals 21a.

[0095] In the battery cell assembly 110, the battery cells 20 are arranged sequentially along the first direction X, and the extension direction of the reinforcing member 30 also faces the first direction X. Thus, the extension direction of the reinforcing member 30 is consistent with the arrangement direction of the battery cells 20, and the reinforcing member 30 can connect to the outer casing 210 of all battery cells 20 in the battery cell assembly 110 through the first protective member 40. Furthermore, when the reinforcing member 30 and the first protective member 40 are disposed between two adjacent sets of battery cell assemblies 110, the reinforcing member 30 can connect to all battery cells 20 in both adjacent sets of battery cell assemblies 110 through the first protective member 40.

[0096] With this configuration, the reinforcing member 30 has more connection points with the battery cell assembly 110 through the first protective member 40, resulting in better connection strength between the reinforcing member 30 and the battery cell assembly 110. Furthermore, the reinforcing member 30 is also connected to the beam structure 101 of the housing 10. As a result, the overall structural strength of the battery device 100 is better, and the stability of the battery device 100 is also better.

[0097] Referring to Figures 2, 6, and 7, in some embodiments, in the third direction Z, the first protective member 40 extends beyond the range of the busbar component 50, and a gap is formed between the first protective member 40 and the inner wall surface of the housing 10; wherein the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0098] The third direction Z can be any direction; for example, in some embodiments, when the first direction X and the second direction Y are the length direction and width direction of the box 10, respectively, the third direction Z can be the height direction of the box 10.

[0099] On the third direction Z, the first protective member 40 extends beyond the range of the busbar 50, thereby separating the busbars 50 on both sides and effectively increasing the creepage distance between two adjacent busbars 50.

[0100] A gap is formed between the first protective component 40 and the inner wall surface of the housing 10, thereby reducing the probability of assembly interference between the first protective component 40 and the housing 10.

[0101] With this configuration, the first protective component 40 can separate the current-carrying components 50 on both sides and further increase the creepage distance. The first protective component 40 also forms a gap between the inner wall surfaces of the housing 10 to reduce the probability of assembly interference.

[0102] Referring to Figures 6 and 7, in some embodiments, on the third-direction Z, the first protective member 40 extends beyond the busbar 50 by a dimension H, where 0 ≤ H ≤ 5 mm.

[0103] Optionally, the dimension H of the first protective member 40 extending beyond the busbar member 50 in the third direction Z can be, but is not limited to, 0, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc.

[0104] By limiting the dimension H of the first protective member 40 extending beyond the busbar component 50 to greater than or equal to 0 and less than or equal to 5 mm, the first protective member 40 can separate the busbar components 50 on both sides to reduce the probability of short circuit, and can also reduce the probability that the dimension H of the first protective member extending beyond the busbar component 50 is too long and affects the assembly.

[0105] Please refer to Figures 6 and 7. In some embodiments, 1mm ≤ H ≤ 4mm.

[0106] Optionally, the dimension H of the first protective member 40 extending beyond the busbar member 50 in the third direction Z may be, but is not limited to, 1mm, 1.2mm, 1.4mm, 1.5mm, 1.7mm, 2mm, 2.2mm, 2.5mm, 2.7mm, 2.9mm, 3mm, 3.1mm, 3.3mm, 3.5mm, 3.7mm, 3.9mm, 4mm, etc.

[0107] With this configuration, by further limiting the dimension H of the first protective member 40 beyond the busbar component 50 to greater than or equal to 1 mm and less than or equal to 4 mm, the first protective member 40 can effectively increase the creepage distance between the busbar components 50 on both sides, and the first protective member 40 has a low impact on assembly.

[0108] Referring to Figures 6 and 7, in some embodiments, the first protective member 40 is provided with a receiving groove 401, and the reinforcing member 30 is fixedly disposed in the receiving groove 401.

[0109] Optionally, the receiving groove 401 can be, but is not limited to, a rectangular groove, an arc-shaped groove, a triangular groove, or other groove types. The reinforcing member 30 can be completely contained within the receiving groove 401, that is, in the third direction Z, the size of the reinforcing member 30 is less than or equal to the depth of the receiving groove 401; or, a portion of the reinforcing member 30 can extend outward from the opening of the receiving groove 401, that is, in the third direction Z, the size of the reinforcing member 30 is greater than the depth of the receiving groove 401.

[0110] The reinforcing member 30 can be glued and fixed in the receiving groove 401 by means of adhesive or other means. For example, the reinforcing member 30 can be glued to the inner wall of the receiving groove 401.

[0111] It should be understood that, in order to separate the reinforcing member 30 and the battery cell assembly 110 on opposite sides of the first protective member 40, the opening of the receiving groove 401 should be opened facing away from the battery cell assembly 110; thereby, when the reinforcing member 30 is housed in the receiving groove 401, the probability of a short circuit between the reinforcing member 30 and the battery cell assembly 110 is effectively reduced.

[0112] Referring to Figures 6 and 7, in some embodiments, the first protective member 40 includes a first protective part 41 and two second protective parts 42 disposed on the first protective part 41. The first protective part 41 is connected to the side surface of the housing 210 where the electrode terminal 21a is disposed. The two second protective parts 42 are respectively connected to both sides of the first protective part 41 along the second direction Y, and together with the first protective part 41, they form a receiving groove 401. The reinforcing member 30 is inserted into the receiving groove 401. In the second direction Y, the projection of the reinforcing member 30 and the projection of the busbar 50 are both located on the second protective part 42.

[0113] The first protective part 41 and the second protective part 42 are partial structures on the first protective member 40; the first protective part 41 and the two second protective parts 42 together enclose and form a receiving groove 401; for example, the first protective part 41 and the two second protective parts 42 can be combined to form a "U" shaped structure, and the open end of the "U" shaped structure faces away from the battery cell assembly 110.

[0114] The reinforcing member 30 is inserted into the receiving groove 401 to achieve clamping and fixing within the receiving groove 401; optionally, the reinforcing member 30 can be bonded and fixed to the first protective part 41 by means of adhesive or the like, or the reinforcing member 30 can be bonded and fixed to the second protective part 42 by means of adhesive or the like, or the reinforcing member 30 can be bonded and fixed to both the first protective part 41 and the second protective part 42 by means of adhesive or the like.

[0115] It should be understood that when the reinforcing member 30 is inserted into the receiving groove 401, the two second protective parts 42 can respectively separate the reinforcing member 30 from the busbars 50 on the battery cell assembly 110 on both sides; and in the second direction Y, the projection of the reinforcing member 30 and the projection of the busbars 50 are both located on the second protective parts 42, that is, the second protective parts 42 can separate the reinforcing member 30 and the busbars 50 on both sides, so as to effectively increase the creepage distance between the reinforcing member 30 and the busbars 50 on both sides, thereby reducing the probability of short circuit arcing between the reinforcing member 30 and the battery cell assembly 110.

[0116] The first protective part 41 is connected to the side surface of the housing 210 where the electrode terminal 21a is provided; wherein, the housing 210 includes a housing 22 and an end cap 21, and the electrode terminal 21a is provided on the end cap 21, as shown in FIG3, thereby the first protective part 41 can form a connection with the surface of the end cap 21. Exemplarily, when the first protective member 40 is located between two adjacent sets of battery cell assemblies 110, the first protective part 41 can be connected to the shoulder of the end cap 21, that is, the adjacent area on the side surface of the end cap 21 of two adjacent battery cells 20 in the second direction Y where the electrode terminal 21a is provided.

[0117] With this configuration, the reinforcing member 30 can be inserted into the receiving groove 401 formed by the first protective part 41 and the two second protective parts 42. The second protective parts 42 can separate the reinforcing member 30 and the current collector 50 on both sides to effectively increase the creepage distance between the reinforcing member 30 and the current collector 50. At the same time, the reinforcing member 30 is connected to the outer casing 210 through the first protective part 41, thereby effectively improving the overall structural strength of the battery device 100.

[0118] Please refer to Figures 8 and 9. In some embodiments, the first protective member 40 has a receiving cavity 402, and the reinforcing member 30 is fixedly disposed in the receiving cavity 402.

[0119] Optionally, the receiving cavity 402 may be, but is not limited to, a long, narrow cavity with a circular, rectangular, or triangular cross-section; the reinforcing member 30 is fixedly disposed within the receiving cavity 402, that is, the first protective member 40 can form a wrapping protection around the reinforcing member 30 by means of a sleeve. The reinforcing member 30 can be fixed to the inner wall of the receiving cavity 402 by adhesive bonding.

[0120] Meanwhile, the first protective component 40 can also separate the busbar components 50 on two adjacent battery cell assemblies 110 to reduce the probability of short circuit arcing between adjacent busbar components 50.

[0121] With this configuration, the reinforcing member 30 is fixedly installed inside the receiving cavity 402, and the first protective member 40 can cover and protect the reinforcing member 30 to reduce the probability of a short circuit between the reinforcing member 30 and the busbar component 50.

[0122] Please refer to Figures 9 to 11. In some embodiments, a second protective member 60 is provided on the busbar 50, and the second protective member 60 covers at least a portion of the busbar 50; a third protective member 70 is also provided on the first protective member 40, the third protective member 70 is located on the side of the busbar 50 facing away from the electrode terminal 21a, and the side of the third protective member 70 facing the busbar 50 is connected to the second protective member 60.

[0123] The second protective element 60 is applied to at least a portion of the busbar component 50; the second protective element 60 is used to provide insulation and thermal protection to the busbar component 50, thereby reducing the probability that the busbar component 50 will short-circuit due to the accumulation of particulate matter generated by the thermal runaway gas during the high-speed scouring flow in the event of thermal runaway of the battery cell 20.

[0124] Optionally, the second protective component 60 should be made of a high-temperature resistant insulating material. For example, the second protective component 60 can withstand a high temperature of 800°C and maintain good insulation performance at high temperatures. The second protective component 60 can be, but is not limited to, materials such as ceramic composite tape or mica paper.

[0125] The second protective element 60 may cover part of the busbar component 50; or, the second protective element 60 may completely cover the busbar component 50 to achieve a better protective effect.

[0126] A third protective component 70 is also provided on the first protective component 40. The third protective component 70 is connected to the second protective component 60. Thus, the third protective component 70 can connect and support the second protective component 60, effectively reducing the probability that the second protective component 60 will be lifted by thermal runaway gas. The first protective component 40 and the third protective component 70 can be connected and fixed by means of bonding, heat fusion, or other methods.

[0127] The third protective component 70 can be fixedly connected to the first protective component 40 by means of bonding, hot-melt connection or other methods; or the third protective component 70 can be integrally formed with the first protective component 40.

[0128] For example, in some embodiments, when the first protective member 40 includes a first protective part 41 and two second protective parts 42, and the first protective part 41 and the two second protective parts 42 together enclose and form a receiving groove 401, the third protective member 70 can be a protective structure disposed on the side of the second protective part 42 away from the first protective part 41, and the two second protective parts 42 are each provided with a third protective member 70. The first protective part 41, the two second protective parts 42 and the two third protective members 70 can be combined to form an inverted "V" structure, and the third protective member 70 can be stacked on the second protective member 60; as shown in FIG7.

[0129] Alternatively, in other embodiments, when the first protective member 40 includes a first protective portion 41 and two second protective portions 42, and the first protective portion 41 and the two second protective portions 42 together enclose and form a receiving groove 401, the third protective member 70 can be a sheet structure that covers one end of the two second protective portions 42 facing away from the first protective portion 41. The third protective member 70 can further enclose and protect the reinforcing member 30 in the receiving groove 401, and the third protective member 70 can also extend in the second direction Y to be stacked on the second protective member 60 to support and connect the second protective member 60; as shown in FIG9.

[0130] Alternatively, in other embodiments, when the first protective member 40 has a receiving cavity 402 inside, the third protective member 70 can be attached to the surface of the first protective member 40 and stacked on the second protective member 60 to support and connect the second protective member 60. Thus, the third protective member 70 can also provide heat insulation protection for the first protective member 40; as shown in Figure 11.

[0131] Please refer to Figures 7 to 11. In some embodiments, in the third direction Z, the third protective member 70 and at least a portion of the second protective member 60 overlap, and the overlapping portion of the third protective member 70 and at least a portion of the second protective member 60 has a dimension M in the second direction Y, and the second protective member 60 has a dimension N in the second direction Y, wherein 1mm≤M≤N.

[0132] It should be understood that the larger the size M of the overlapping part, the larger the connection area formed by the second protective member 60 and the third protective member 70, and the better the fixing effect of the third protective member 70 on the second protective member 60.

[0133] With this configuration, the overlapping portion of the third protective member 70 and at least a portion of the second protective member 60 in the third direction Z is limited to a dimension M in the second direction Y that is greater than or equal to 1 mm and less than or equal to the dimension N of the second protective member 60 in the second direction Y. This ensures that the third protective member 70 and the second protective member 60 have a sufficient overlapping area, or that the third protective member 70 can completely cover the second protective member 60 to effectively fix and support the second protective member 60.

[0134] Please refer to Figures 7 to 11. In some embodiments, the surface of the reinforcing member 30 is provided with an insulating protective layer (not shown in the figures).

[0135] Optionally, the insulating protective layer includes, but is not limited to, structures such as insulating coatings, insulating sleeves, and insulating wrapping tape. For example, in some embodiments, the surface of the reinforcing member 30 may be coated with an insulating coating; or, in other embodiments, the surface of the reinforcing member 30 may be protected by wrapping insulating wrapping tape around it.

[0136] This configuration improves the insulation performance of the reinforcing member 30 by providing an insulating protective layer on its surface, thereby further reducing the probability of a short circuit between the reinforcing member 30 and the busbar 50.

[0137] Please refer to Figures 7 to 11. In some embodiments, a heat insulation layer 80 is provided between at least two sets of adjacent battery cell assemblies 110.

[0138] The thermal insulation layer 80 is used to reduce the rate of heat transfer. The thermal insulation layer 80 may be made of a low thermal conductivity material, such as aerogel or porous vacuum silicon, to insulate the heat conduction between the battery cell components 110.

[0139] This configuration uses the heat insulation layer 80 to separate adjacent battery cell modules 110, thereby reducing the probability of heat conduction between adjacent battery cell modules 110 and thus reducing the probability of thermal runaway propagation.

[0140] The battery device 100 provided in the embodiments of this application will now be further described according to specific implementation methods.

[0141] Referring to Figures 2 to 7, in this embodiment, the battery device 100 includes a housing 10, a battery cell assembly 110, a reinforcing member 30, and a first protective member 40. The housing 10 has beam structures 101 at opposite ends in the first direction X. The battery cell assembly 110 is housed within the housing 10 and located between two beam structures 101. The battery cell assemblies 110 are arranged in at least two groups along the second direction Y. Each battery cell assembly 110 includes multiple battery cells 20 arranged sequentially along the first direction X, which is perpendicular to the second direction Y. The reinforcing member 30 and the first protective member 40 are disposed between two adjacent groups of battery cell assemblies 110. One end of the reinforcing member 30 is connected to the beam structure 101 on the same side, and the first protective member 40 is connected to the reinforcing member 30 and simultaneously connected to the battery cells 20 in the two adjacent groups of battery cell assemblies 110.

[0142] The battery cell 20 includes a housing 210 and an electrode terminal 21a disposed on the housing 210. A current-combining component 50 is disposed on the battery cell 20 group and is electrically connected to the electrode terminal 21a. The first protective member 40 includes a first protective part 41 and two second protective parts 42 disposed on the first protective part 41. The first protective part 41 and the two second protective parts 42 together form a receiving groove 401. The first protective part 41 is connected to the side surface of the housing 210 where the electrode terminal 21a is disposed. A reinforcing member 30 is inserted into the receiving groove 401 and is connected to the first protective part 41 and / or the second protective part 42. In the second direction Y, the projection of the reinforcing member 30 and the projection of the current-combining component 50 are both located on the second protective part 42.

[0143] Meanwhile, a second protective element 60 is provided on the manifold 50, covering at least a portion of the manifold 50; a third protective element 70 is also provided on the first protective element 40, connected to the second protective element 60. Each of the two second protective parts 42 has a third protective element 70 at its end opposite to the first protective part 41. The third protective element 70 can be stacked and fixedly connected to the second protective element 60, using the third protective element 70 to support and connect the second protective element 60, thereby reducing the probability of the second protective element being lifted by high-speed thermal runaway gas.

[0144] Referring to Figures 1 to 4, in a second aspect, 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.

[0145] The electrical device provided in this application embodiment is, for example, the vehicle 1000 described above. The electrical device includes the battery device 100 described above. When the stability of the battery device 100 is better, the stability of the electrical device is also better.

[0146] 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 has beam structures at its two opposite ends in the first direction; A battery cell assembly is housed within the housing and located between two beam structures; the battery cell assemblies are arranged in at least two groups along a second direction, and each group of battery cell assemblies is electrically connected to a busbar, wherein the first direction is perpendicular to the second direction; A reinforcing member extending along the first direction, with its two ends along the first direction respectively connected to two beam structures; the reinforcing member is disposed between two adjacent sets of battery cell assemblies; and A first protective member is connected to the reinforcing member and the battery cell assembly, and the reinforcing member and the adjacent busbar are separated on opposite sides of the first protective member; in the second direction, the projection of the busbar is located on the first protective member.

2. The battery device according to claim 1, characterized in that: The battery cell assembly includes a plurality of battery cells arranged sequentially along the first direction. Each battery cell includes a housing and electrode terminals disposed on the housing. The busbar is electrically connected to the electrode terminals. The first protective member is simultaneously connected to the housings of two adjacent sets of the battery cell assemblies.

3. The battery device according to claim 2, characterized in that: In the third direction, the first protective member extends beyond the range of the busbar component, and a gap is formed between the first protective member and the inner wall surface of the housing; wherein the first direction, the second direction, and the third direction are perpendicular to each other.

4. The battery device according to claim 3, characterized in that: In the third direction, the first protective member extends beyond the busbar by a dimension H, where 0 ≤ H ≤ 5 mm.

5. The battery device according to claim 4, characterized in that: 1mm≤H≤4mm.

6. The battery device according to any one of claims 3 to 5, characterized in that: The first protective component is provided with a receiving groove, and the reinforcing component is fixedly disposed in the receiving groove.

7. The battery device according to claim 6, characterized in that: The first protective member includes a first protective part and two second protective parts disposed on the first protective part. The first protective part is connected to the side surface of the housing on which the electrode terminal is disposed. The two second protective parts are respectively connected to both sides of the first protective part along the second direction and together with the first protective part form the receiving groove. The reinforcing member is inserted into the receiving groove. In the second direction, the projection of the reinforcing member and the projection of the busbar are both located on the second protective part.

8. The battery device according to any one of claims 2 to 5, characterized in that: The first protective component has a receiving cavity, and the reinforcing component is fixedly disposed in the receiving cavity.

9. The battery device according to claim 7 or 8, characterized in that: The busbar component is provided with a second protective member, which covers at least a portion of the busbar component; the first protective member is also provided with a third protective member, which is located on the side of the busbar component facing away from the electrode terminal, and the side of the third protective member facing the busbar component is connected to the second protective member.

10. The battery device according to claim 9, characterized in that: In the third direction, the third protective member and at least a portion of the second protective member overlap, and the overlapping portion of the third protective member and at least a portion of the second protective member has a dimension M in the second direction, and the second protective member has a dimension N in the second direction, wherein 1mm≤M≤N.

11. The battery device according to any one of claims 1 to 10, characterized in that: The surface of the reinforcing member is provided with an insulating protective layer.

12. The battery device according to any one of claims 1 to 11, characterized in that: A heat insulation layer is provided between at least two adjacent sets of the battery cell assembly.

13. An electrical device, characterized in that: Includes the battery device as described in any one of claims 1 to 12, the battery device being used to provide electrical energy.

Images