Battery device and electric equipment

Abstract

The utility model relates to the technical field of battery production, in particular to a battery device and electric equipment. The battery device comprises a battery monomer and a box body, wherein the battery monomer comprises a pressure relief mechanism; the box body comprises a first box body and a second box body, the first box body and the second box body are connected in a buckling manner and define an accommodating space, the battery monomers are arranged in the accommodating space, and the first box body is arranged below the second box body along the gravity direction; a mounting plate is arranged in the first box body, a first through hole is formed in the mounting plate, and the first through hole is opposite to the pressure relief mechanism; the surface, facing the battery monomers, of the first box body is provided with a reinforcing piece, at least part of the reinforcing piece is arranged around the first through hole, a space defined by the reinforcing piece is communicated with the first through hole, the reinforcing piece is provided with a second through hole, and the hole axis direction of the second through hole is intersected with the hole axis direction of the first through hole. According to the application, the reinforcing parts are arranged on the surfaces, facing the battery monomers, of the mounting plates, so that the strength of the mounting plates can be improved through the reinforcing parts, and the fracture probability of the mounting plates is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and particularly relates to a battery device and an electrical equipment. Background Art

[0002] What is provided in this part is only background information related to the present disclosure, and it is not necessarily prior art.

[0003] With the increasing maturity of new energy technologies, electrical equipment such as new energy vehicles has gradually come into the public eye. The main core technology of new energy vehicles lies in the battery device, and the safety and stability of the battery device directly determine the performance of the entire vehicle.

[0004] The battery device includes battery cells and a box body. The box body includes a first box body and a second box body. The battery cells are arranged in the space surrounded by the first box body and the second box body. Among them, the first box body is located below the second box body along the direction of gravity, and a mounting plate is arranged in the first box body. The battery cell includes a pressure relief mechanism. Among them, the pressure relief mechanism is located at the bottom of the battery cell. In order to achieve the function of gas discharge, a first through hole is usually arranged on the mounting plate, and the first through hole is arranged opposite to the pressure relief mechanism. However, this structure will cause the strength of the mounting plate to decrease and it is easy to break. Summary of the Utility Model

[0005] In view of the above problems, the present application provides a battery device and an electrical equipment, which solve the problem that the mounting plate breaks due to the decrease in the strength of the mounting plate in the prior art.

[0006] A first aspect of an embodiment of the present application provides a battery device, which includes:

[0007] Battery cells, the battery cells include a pressure relief mechanism;

[0008] A box body, the box body includes a first box body and a second box body. The first box body and the second box body are snap-connected to enclose a receiving space, and the battery cells are arranged in the receiving space. Among them, the first box body is arranged below the second box body along the direction of gravity;

[0009] A mounting plate is arranged in the first box body. A first through hole is arranged on the mounting plate, and the first through hole is arranged opposite to the pressure relief mechanism; on the surface of the mounting plate facing the battery cells, a reinforcing member is arranged, and at least part of the reinforcing member surrounds the first through hole, and the space enclosed by the reinforcing member communicates with the first through hole; among them, a second through hole is arranged on the reinforcing member, and the axial direction of the second through hole intersects with the axial direction of the first through hole.

[0010] Embodiments of the present application are provided by setting a first through hole on the mounting plate, the first through hole is disposed opposite to the pressure relief mechanism, and a reinforcing member is provided on the surface of the mounting plate facing the battery cell, and at least a part of the reinforcing member surrounds the first through hole, and the space surrounded by the reinforcing member communicates with the first through hole, so that while the first through hole of the mounting plate can achieve the function of gas discharge, the strength of the mounting plate can be increased through the reinforcing member, and the probability of the mounting plate breaking can be reduced.

[0011] In some embodiments of the present application, the reinforcing member has an annular structure, and the annular structure extends toward the side of the battery cell.

[0012] Embodiments of the present application are provided by setting the reinforcing member as an annular structure, and the annular structure extends toward the side of the battery cell, so that the reinforcing member can be provided on the outer circumference of the first through hole, thereby improving the strength of the mounting plate near the first through hole.

[0013] In some embodiments of the present application, the annular structure includes a first flanging, and the first flanging is connected to the circumferential edge of the first through hole.

[0014] Embodiments of the present application are provided by including a first flanging in the annular structure, and the first flanging is connected to the circumferential edge of the first through hole, so that the processing of the first flanging can be realized through the stamping process, reducing the production cost of the mounting plate and improving the production efficiency of the mounting plate.

[0015] In some embodiments of the present application, a second through hole is provided on the first flanging.

[0016] Embodiments of the present application are provided by providing a second through hole on the first flanging, so that the gas discharged by the pressure relief mechanism can be discharged into the accommodation space of the box body through the second through hole, thereby facilitating the discharge of the discharged gas from the battery device.

[0017] In some embodiments of the present application, the shape of the first flanging is the same as the shape of the pressure relief mechanism.

[0018] Embodiments of the present application are provided by setting the shape of the first flanging to be the same as the shape of the pressure relief mechanism, so that the shape of the first flanging can be set according to the shape of the pressure relief mechanism, reducing the material cost occupied by the first flanging, thereby reducing the production cost of the mounting plate.

[0019] In some embodiments of the present application, the reinforcing member includes at least two reinforcing ribs, and the at least two reinforcing ribs are spaced along the circumference of the first through hole, and a second through hole is formed between adjacent two reinforcing ribs.

[0020] In an embodiment of the present application, the reinforcing member includes at least two reinforcing ribs, and the at least two reinforcing ribs are arranged at intervals along the circumference of the first through hole. A second through hole is formed between two adjacent reinforcing ribs. Thus, the strength of the portion of the mounting plate near the first through hole can be increased by the at least two reinforcing ribs, and the function of exhausting gas can be realized through the second through hole between the two reinforcing ribs.

[0021] In some embodiments of the present application, the at least two reinforcing ribs are radially distributed with the first through hole as the center.

[0022] In an embodiment of the present application, by radially distributing the at least two reinforcing ribs with the first through hole as the center, the strength of the portion of the mounting plate near the first through hole can be increased by the reinforcing ribs on the outer circumference in the circumferential direction of the first through hole, and the strength distribution of the mounting plate is uniform, and the probability of fracture is not likely to occur.

[0023] In some embodiments of the present application, at least two first through holes are provided on the mounting plate, and each first through hole is disposed opposite to a pressure relief mechanism respectively; a reinforcing member is respectively disposed on the outer circumference in the circumferential direction of each first through hole, and each reinforcing member surrounds one through hole.

[0024] In an embodiment of the present application, by providing at least two first through holes on the mounting plate, each first through hole is disposed opposite to a pressure relief mechanism respectively; a reinforcing member is respectively disposed on the outer circumference in the circumferential direction of each first through hole, and each reinforcing member surrounds one through hole, the position of the first through hole can be set according to the position of the pressure relief mechanism, and the position of the reinforcing member can be set according to the position of the first through hole, so as to increase the strength of the mounting plate on the outer circumference in the circumferential direction of each first through hole, thereby improving the overall strength of the mounting plate.

[0025] In some embodiments of the present application, the mounting plate includes a magnesium alloy member.

[0026] In an embodiment of the present application, by including a magnesium alloy member in the mounting plate, the advantage of the relatively small density of the magnesium alloy can be fully utilized, so that the weight of the mounting plate made of the magnesium alloy member is lighter, which can effectively reduce the weight of the battery device box, thereby improving the battery life of the electrical equipment. In addition, the magnesium alloy member also has good heat dissipation performance, which can quickly dissipate the heat generated by the battery device to the outside, thereby improving the performance and service life of the battery device. In addition, the magnesium alloy member also has excellent shock absorption performance, which can effectively absorb vibration and impact, and protect the battery device from damage.

[0027] In some embodiments of the present application, the projection of the pressure relief mechanism on the mounting plate is within the contour line of the first through hole.

[0028] In an embodiment of the present application, by making the projection of the pressure relief mechanism on the mounting plate within the contour line of the first through hole, the gas discharged by the pressure relief mechanism can flow into the first through hole as soon as possible, achieving the effect of rapid exhaust.

[0029] In some embodiments of the present application, along the direction from the first box body to the battery cell, the size of the reinforcing member is in the range of 3 millimeters to 10 millimeters.

[0030] In the embodiments of the present application, by setting the size of the reinforcing member in the range of 3 millimeters to 10 millimeters along the direction from the first box body to the battery cell, the strength of the mounting plate can be increased through the reinforcing member, and the situation that the strength increase is small due to the too small size of the reinforcing member will not occur, nor will the situation that the volume of the battery device is too large due to the too large size of the reinforcing member occur.

[0031] In some embodiments of the present application, the size of the reinforcing member is in the range of 4 millimeters to 6 millimeters.

[0032] In the embodiments of the present application, by setting the size of the reinforcing member in the range of 4 millimeters to 6 millimeters, the strength of the mounting plate can be increased through the reinforcing member, and the situation that the strength increase is small due to the too small size of the reinforcing member will not occur, nor will the situation that the volume of the battery device is too large due to the too large size of the reinforcing member occur.

[0033] In some embodiments of the present application, the battery cell further includes a terminal post. The terminal post and the pressure relief mechanism are respectively arranged at opposite ends of the battery cell, and the pressure relief mechanism faces the mounting plate.

[0034] In the embodiments of the present application, by respectively arranging the terminal post and the pressure relief mechanism at opposite ends of the battery cell, and the pressure relief mechanism faces the mounting plate, the pressure relief mechanism can be arranged at the bottom end of the battery cell. After the battery device undergoes thermal runaway, high-temperature and high-pressure gas and electrolyte can be quickly discharged through the pressure relief mechanism at the bottom end, protecting the safety of the vehicle occupants, reducing the corrosion and damage to other components of the electrical equipment, and facilitating the improvement of the space utilization efficiency of the battery device.

[0035] In some embodiments of the present application, the battery device further includes an adhesive. The adhesive is arranged in at least part of the gap between the battery cell and the mounting plate, and an exhaust passage communicating with the second through hole is arranged between the battery cell and the mounting plate.

[0036] In the embodiments of the present application, by arranging the adhesive in at least part of the gap between the battery cell and the mounting plate, the connection between the battery cell and the mounting plate can be realized, and the fixing of the battery cell can be realized. In addition, by arranging an exhaust passage communicating with the second through hole between the battery cell and the mounting plate, the gas discharged from the second through hole can be conveniently discharged to the outside of the battery device through the exhaust passage.

[0037] In a second aspect of the embodiments of the present application, an electrical equipment is proposed. The electrical equipment includes the battery device mentioned in the above embodiments.

[0038] The above description is only an overview of the technical solution of the present application. In order to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific implementation manners of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0040] Figure 1 is a schematic structural diagram of an electrical device provided in some embodiments of the present application;

[0041] Figure 2 is a schematic structural diagram of a battery device provided in some embodiments of the present application (the mounting plate is not shown);

[0042] Figure 3 is a schematic structural diagram of the mounting plate of the battery device provided in some embodiments of the present application;

[0043] Figure 4 is Figure 3 a partial enlarged structural diagram of the mounting plate of the battery device shown in at A;

[0044] Figure 5 is Figure 3 an assembly structural diagram of the battery cell and the mounting plate of the battery device shown in (the adhesive is not shown);

[0045] Figure 6 is Figure 5 a partial enlarged structural diagram of the battery cell and the mounting plate of the battery device shown in at B;

[0046] Figure 7 is Figure 5 a structural diagram of the battery cell of the battery device shown in from a second perspective;

[0047] Figure 8 is Figure 4 a sectional structural diagram of the mounting plate shown in along the C-C section;

[0048] Figure 9 is Figure 8 another sectional structural diagram of the mounting plate shown in ;

[0049] Figure 10 is Figure 6 a structural diagram of the battery cell and the mounting plate shown in in a bonded state.

[0050] The reference numerals are as follows:

[0051] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0052] 10, battery cell; 11, pressure relief mechanism; 12, battery main body; 13, terminal;

[0053] 20, box body; 21, first box body; 22, second box body; 23, accommodation space; 24, mounting plate; 241, first through hole; 242, reinforcing member; 2421, first flanging; 2422, second through hole; 2423, reinforcing rib;

[0054] 30, gap;

[0055] 40, exhaust passage;

[0056] 50, binder;

[0057] X-X, width direction of the battery device;

[0058] Y-Y, length direction of the battery device;

[0059] Z-Z, height direction of the battery device. Detailed embodiments

[0060] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and thus are only examples and should not be used to limit the protection scope of the present application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0062] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two unless otherwise specifically defined.

[0063] References to "embodiments" in this specification mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and is not necessarily referring to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0064] In the description of the embodiments of the present application, the term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0065] In the description of the embodiments of the present application, the term "plural" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0066] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", and "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0068] Currently, from the perspective of the development of the market situation, the application of battery devices is becoming more and more widespread. Battery devices are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of battery devices, the market demand is also continuously increasing.

[0069] The battery device involved in the embodiments of this application can be but is not limited to being used in electrical equipment such as vehicles, ships, or aircraft. The battery device that composes the electrical equipment can use the battery monomers, battery devices, etc. involved in this application.

[0070] The electrical equipment using the battery device as a power source in the embodiments of this application can be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0071] It should be understood that the technical solutions described in the embodiments of this application are not only limited to the battery devices and electrical equipment described above, but also applicable to all batteries including boxes and electrical equipment using batteries.

[0072] The battery device (Battery Apparatus) mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0073] In some embodiments, the battery cell assembly (Battery Cell Assembly) is usually formed by arranging a plurality of battery cells.

[0074] As an example, the battery cell assembly can be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0075] In some embodiments, the battery device can be a battery pack (battery Pack), and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0076] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box by fixing the battery module in the box.

[0077] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells to the box.

[0078] As an example, the box can include a first box body and a second box body. The first box body and the second box body are snapped together so that a closed space is formed inside the box to accommodate the battery cell assembly. The "closed" here means covering or closing, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0079] As an example, the box can 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 a closed space is formed inside the box to accommodate the battery cell assembly.

[0080] In some embodiments, the box can be part of the chassis structure of a vehicle. For example, a part of the box can become at least a part of the floor of the vehicle, or a part of the box can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0081] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the coated positive electrode active material layer protrudes from the current collector with the coated positive electrode active material layer. The current collectors without the coated positive electrode active material layer are stacked to form a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the coated negative electrode active material layer protrudes from the current collector with the coated negative electrode active material layer. The current collectors without the coated negative electrode active material layer are stacked to form a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of the present application are not limited thereto.

[0082] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0083] The battery device includes battery cells and a box body. The box body includes a first box body and a second box body. The battery cells are arranged in the space surrounded by the first box body and the second box body. The first box body and the second box body are connected by buckling. Among them, the first box body is located below the second box body along the direction of gravity. The battery cells include a pressure relief mechanism. Among them, the pressure relief mechanism is located at the bottom of the battery cells. In order to realize the function of gas discharge, a first through hole is usually provided on the mounting plate. The first through hole and the pressure relief mechanism are arranged opposite to each other. However, this structure will reduce the strength of the mounting plate and is prone to breakage.

[0084] The embodiment of the present application proposes a battery device to solve this problem. The battery device includes battery cells and a box body. The battery cells include a pressure relief mechanism. The box body includes a first box body and a second box body. The first box body and the second box body are connected by buckling and enclose an accommodation space. The battery cells are arranged in the accommodation space. Among them, the first box body is arranged below the second box body along the direction of gravity; a mounting plate is arranged in the first box body, and a first through hole is provided on the mounting plate. The first through hole and the pressure relief mechanism are arranged opposite to each other; a mounting plate is arranged in the mounting plate, and a reinforcing member is provided on the surface of the mounting plate facing the battery cells. At least part of the reinforcing member surrounds the first through hole. The space surrounded by the reinforcing member communicates with the first through hole, and a second through hole is provided on the reinforcing member. The axial direction of the second through hole intersects with the axial direction of the first through hole. The embodiment of the present application sets a first through hole on the mounting plate. The first through hole and the pressure relief mechanism are arranged opposite to each other, and a reinforcing member is provided on the surface of the mounting plate facing the battery cells, and at least part of the reinforcing member surrounds the first through hole. While the first through hole of the mounting plate can realize the function of gas discharge, the strength of the mounting plate can be increased by the reinforcing member, and the probability of the mounting plate breaking is reduced.

[0085] The battery device in the embodiment of the present application can be used in power-consuming devices such as vehicles, or can be installed on other power-consuming devices that need to install the battery device in advance.

[0086] The structure in the embodiment of the present application will be described in detail below with reference to the drawings.

[0087] Combined with Figure 1 As shown, the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is arranged inside the vehicle 1000. The battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 may further 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, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0088] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, providing driving power for the vehicle 1000 instead of or partially replacing fuel or natural gas.

[0089] As Figure 2 shown, an embodiment of the present application also provides a battery device 100, including a battery box body 20 and battery cells 10. An accommodation space 23 is provided in the battery box body 20, and the battery cells 10 are installed in the accommodation space 23.

[0090] In some embodiments, as Figure 2 shown, the battery box body 20 may include a first box body 21 and a second box body 22. The first box body 21 and the second box body 22 cover each other, and the first box body 21 and the second box body 22 jointly define an accommodation space 23 for accommodating the battery cells 10. Among them, both the first box body 21 and the second box body 22 may be hollow structures with one end open, and the second box body 22 covers the opening side of the first box body 21 so that the first box body 21 and the second box body 22 jointly define the accommodation space; or the second box body 22 may be a plate-like structure, and the first box body 21 is a hollow structure with one side open, and the opening side of the second box body 22 covers the opening side of the first box body 21. Of course, the battery box body 20 formed by the first box body 21 and the second box body 22 may be in various shapes, such as a cylinder, a cuboid, etc.

[0091] The battery cell 10 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 10 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc.

[0092] Continuing to refer to Figures 3 to 9 shown, the battery device 100 includes a battery cell 10 and a box body 20. Among them, the battery cell 10 includes a battery main body portion 12 and a pressure relief mechanism 11, and the box body 20 includes a first box body 21 and a second box body 22. The first box body 21 and the second box body 22 are snap-connected and enclose an accommodation space 23 for accommodating the battery cell 10. Among them, the first box body 21 is provided below the second box body 22 along the direction of gravity; a mounting plate 24 is provided in the first box body 21, and a first through hole 241 is provided on the mounting plate 24, and the first through hole 241 is disposed opposite to the pressure relief mechanism 11; a mounting plate 24 is provided in the first box body 21, and a reinforcing member 242 is provided on the surface of the mounting plate 24 facing the battery cell 10. At least part of the reinforcing member 242 surrounds the first through hole 241, and the space surrounded by the reinforcing member 242 communicates with the first through hole 241. Among them, a second through hole 2422 is provided on the reinforcing member 242, and the axial direction of the second through hole 2422 intersects with the axial direction of the first through hole 241.

[0093] It should be noted that the mounting plate 24 is connected to the bottom of the first box body 21, and an exhaust passage is provided between the mounting plate 24 and the first box body 21 to facilitate the discharge of gas.

[0094] It should be noted that the battery main body 12 here includes an electrode assembly and a housing, and the electrode assembly is arranged inside the housing. The pressure relief mechanism 11 is a core component of the safety system of the battery device 100 and can be an explosion-proof valve, which is mainly used to release the internal pressure under abnormal working conditions and reduce the probability of explosion of the battery device 100. It can be arranged above or below the battery main body 12. Figure 7 In, the pressure relief mechanism 11 is located below the battery main body 12 along the height direction and along the direction of gravity, where the height direction is Figure 5 the Z-Z direction in, that is to say, the pressure relief mechanism 11 is arranged below the battery main body 12.

[0095] In addition, the relative arrangement of the first through hole 241 and the pressure relief mechanism 11 here means that the first through hole 241 and the pressure relief mechanism 11 are arranged opposite to each other along the height direction, so that the gas discharged by the pressure relief mechanism 11 can enter the first through hole 241. The mounting plate 24 has a plate-like structure, and a reinforcing member 242 is provided on the surface of the mounting plate 24 facing the battery cell 10, and at least part of the reinforcing member 242 surrounds the first through hole 241, that is to say, at least part of the reinforcing member 242 is arranged at the position surrounding the first through hole 241 of the mounting plate 24 to increase the strength of the mounting plate 24 at the position close to the first through hole 241.

[0096] As Figure 5 shown, the axial direction of the second through hole 2422 here can be the Y-Y direction, and the axial direction of the first through hole 241 can be the Z-Z direction, where the Y-Y direction is the length direction of the battery device 100, the Z-Z direction is the height direction of the battery device 100, and the X-X direction is the width direction of the battery device 100. The axial direction of the first through hole 241 is vertically intersecting with the axial direction of the second through hole 2422. At this time, the included angle between the axial direction of the second through hole 2422 and the axial direction of the first through hole 241 is a right angle. The second through hole 2422 is arranged in a horizontal direction here. Of course, the second through hole 2422 can also be arranged obliquely here. At this time, the included angle between the axial direction of the second through hole 2422 and the axial direction of the first through hole 241 is an acute angle or an obtuse angle.

[0097] In an embodiment of the present application, a first through hole 241 is provided on the mounting plate 24. The first through hole 241 is disposed opposite to the pressure relief mechanism 11. A reinforcing member 242 is provided on the surface of the mounting plate 24 facing the battery cell 10, and at least a part of the reinforcing member 242 surrounds the first through hole 241. The space surrounded by the reinforcing member 242 communicates with the first through hole 241. While enabling the first through hole 241 of the mounting plate 24 to achieve the function of gas discharge, the strength of the mounting plate 24 can be increased through the reinforcing member 242, reducing the probability of the mounting plate 24 breaking.

[0098] It should be noted that the space surrounded by the second through hole 2422 and the reinforcing member 242 is also in a communicating state, so that the gas discharged from the pressure relief mechanism 11 can be discharged outward through the first through hole 241 and the second through hole 2422 at the same time, improving the gas discharge efficiency.

[0099] Optionally, as Figure 10 shown, the battery device 100 further includes an adhesive 50. The adhesive 50 is provided in at least a part of the gap 30 between the battery cell 10 and the mounting plate 24, and an exhaust passage 40 communicating with the second through hole 2422 is provided between the battery cell 10 and the mounting plate 24.

[0100] In an embodiment of the present application, by providing the adhesive 50 in at least a part of the gap 30 between the battery cell 10 and the mounting plate 24, the connection between the battery cell 10 and the mounting plate 24 can be realized, and the fixing of the battery cell 10 can be achieved. In addition, by providing an exhaust passage 40 communicating with the second through hole 2422 between the battery cell 10 and the mounting plate 24, the gas discharged from the second through hole 2422 can be conveniently discharged to the outside of the battery device 100 through the exhaust passage 40.

[0101] Specifically, the battery main body portion 12 of the battery cell 10 and the mounting plate 24 can be fixed by bonding. The adhesive can be a structural adhesive, such as using a structural adhesive to realize the connection between the battery main body portion 12 and the mounting plate 24. Among them, the structural adhesive is provided in the gap 30 between the mounting plate 24 and the battery main body portion 12 to realize the bonding between the surfaces of the battery main body portion 12 and the mounting plate 24, and the structural adhesive is located outside the space surrounded by the reinforcing member 242.

[0102] It should be noted that the exhaust passage 40 can be a passage surrounded by the adhesive 50 and is in a communicating state with each second through hole 2422, facilitating the flow of the gas discharged from the second through hole 2422 into the exhaust passage 40. Alternatively, the exhaust passage 40 can also be formed inside the adhesive 50 to facilitate the formation of an air flow passage, and the exhaust passage 40 communicates with the outside of the battery device 100.

[0103] In some embodiments of the present application, such as Figure 3 andFigure 4 As shown, the reinforcing member 242 has an annular structure, and the annular structure extends toward one side of the battery cell 10. Among them, the annular structure means that the reinforcing member 242 surrounds the first through hole 241. The annular structure can be a rectangular annular structure, a runway-shaped annular structure, or a circular annular structure, so that the contour line of the first through hole 241 is within the space enclosed by the annular structure.

[0104] It should be emphasized that the annular structure enclosed by the reinforcing member 242 here can be larger than the contour line of the first through hole 241 or flush with the contour line of the first through hole 241. The reinforcing member 242 can be integrally formed with the mounting plate 24 through a casting process, or can be connected to the mounting plate 24 by welding or other means.

[0105] In the embodiment of the present application, by setting the reinforcing member 242 as an annular structure and the annular structure extending toward one side of the battery cell 10, the reinforcing member 242 can be provided on the circumferential outer side of the first through hole 241, thereby improving the strength of the mounting plate 24 near the first through hole 241.

[0106] In some embodiments of the present application, as Figure 4 shown, the annular structure includes a first flange 2421, and the first flange 2421 is connected to the circumferential edge of the first through hole 241.

[0107] The first flange 2421 here has an annular structure. The first flange 2421 can be formed by stamping the mounting plate 24, which can reduce the production cost of processing the first flange 2421 on the mounting plate 24.

[0108] In the embodiment of the present application, by including the first flange 2421 in the annular structure and the first flange 2421 being connected to the circumferential edge of the first through hole 241, the processing of the first flange 2421 can be achieved through a stamping process, reducing the production cost of the mounting plate 24 and improving the production efficiency of the mounting plate 24.

[0109] In some embodiments of the present application, as Figure 4 shown, a second through hole 2422 is provided on the first flange 2421.

[0110] In the embodiment of the present application, by providing the second through hole 2422 on the first flange 2421 and the hole axis direction of the second through hole 2422 intersecting with the hole axis direction of the first through hole 241, the gas discharged by the pressure relief mechanism 11 can be discharged into the accommodation space 23 of the box body 20 through the second through hole 2422, thereby facilitating the discharge of the discharged gas from the battery device 100.

[0111] Optionally, the second through-hole 2422 here can be a circular hole, a rectangular hole, or a through-hole of other shapes, all of which can achieve the function of exhausting gas, and the gas received by the reinforcing member 242 is exhausted into the accommodation space 23 of the battery device 100 through the second through-hole 2422.

[0112] It can be understood that the second through-hole 2422 here can also be provided at the middle position of the first flanging 2421 in the height direction. Compared with the position where the second through-hole 2422 is provided near the top of the first flanging 2421, the strength of the first flanging 2421 can be increased.

[0113] It should be noted that the structural adhesive is provided in the space between the mounting plate 24 and the battery main body 12 to realize the bonding between the surfaces of the battery main body 12 and the mounting plate 24. Among them, the structural adhesive can only fill a part of the space between the battery main body 12 and the mounting plate 24, and an air flow outflow channel is formed between the battery main body 12 and the mounting plate 24, so that the gas discharged from the second through-hole 2422 can flow to the outside of the battery cell assembly and can be smoothly discharged from the accommodation space 23 of the box body 20.

[0114] In some embodiments of the present application, as Figure 7 shown, the shape of the first flanging 2421 is the same as the shape of the pressure relief mechanism 11.

[0115] In Figure 7 , the pressure relief mechanism 11 has a racetrack-shaped structure. Therefore, the shape of the first flanging 2421 is also set to a racetrack-shaped structure. At this time, the material occupied by the first flanging 2421 can be reduced, and the production cost of the first flanging 2421 can be reduced.

[0116] Correspondingly, when the pressure relief mechanism 11 is a circular structure, the shape of the first flanging 2421 can also be set to a circular structure, which can make the first flanging 2421 more easily receive the gas discharged from the pressure relief mechanism 11.

[0117] In the embodiments of the present application, by setting the shape of the first flanging 2421 to be the same as the shape of the pressure relief mechanism 11, the shape of the first flanging 2421 can be set according to the shape of the pressure relief mechanism 11, reducing the material cost occupied by the first flanging 2421, thereby reducing the production cost of the mounting plate 24.

[0118] Referring to Figure 8 shown, the thickness of the first flanging 2421 is basically the same. Of course, the thickness of the first flanging 2421 here can also be set to an inconsistent structure, which will not be elaborated here.

[0119] In some embodiments of the present application, as Figure 9As shown, the reinforcing member 242 includes at least two reinforcing ribs 2423, and the at least two reinforcing ribs 2423 are arranged at intervals along the circumferential direction of the first through hole 241. A second through hole 2422 is formed between two adjacent reinforcing ribs 2423. At this time, the number of the second through holes 2422 can be two or more than two.

[0120] It should be noted that the number of the reinforcing ribs 2423 here can be three or more, and the multiple reinforcing ribs 2423 are arranged at intervals along the circumferential direction of the first through hole 241, so as to increase the strength of the mounting plate 24 from multiple positions in the circumferential direction of the first through hole 241.

[0121] In the embodiment of the present application, by including at least two reinforcing ribs 2423 in the reinforcing member 242 and arranging the at least two reinforcing ribs 2423 at intervals along the circumferential direction of the first through hole 241, the strength of the part of the mounting plate 24 close to the first through hole 241 can be increased by the at least two reinforcing ribs 2423, and the exhaust function can be realized through the second through holes 2422 between the two reinforcing ribs 2423.

[0122] In this embodiment, the second through hole 2422 can be in a notch structure, and a second through hole 2422 similar to the notch structure is formed between two adjacent reinforcing ribs 2423.

[0123] In some embodiments of the present application, the at least two reinforcing ribs 2423 are radially distributed with the first through hole 241 as the center.

[0124] The at least two reinforcing ribs 2423 mentioned here are radially distributed with the first through hole 241 as the center, that is to say, one end of the reinforcing rib 2423 is the edge of the first through hole 241, and the other end of the reinforcing rib 2423 extends in a direction away from the first through hole 241. At this time, the at least two reinforcing ribs 2423 are in a radially distributed structure with the first through hole 241 as the center.

[0125] In the embodiment of the present application, by radially distributing the at least two reinforcing ribs 2423 with the first through hole 241 as the center, the strength of the part of the mounting plate 24 close to the first through hole 241 can be increased by the reinforcing ribs 2423 on the outer side of the circumferential direction of the first through hole 241, and the strength distribution of the mounting plate 24 is uniform, and the probability of fracture is not easy to occur.

[0126] Optionally, as Figure 9 shown, the reinforcing rib 2423 has a strip-shaped structure, which can be a rectangular strip-shaped structure or a semi-circular strip-shaped structure. The cross-section of the reinforcing rib 2423 along the length direction can be the same, that is to say, the shapes and sizes of all positions of the reinforcing rib 2423 along the length direction are the same.

[0127] In some embodiments of the present application, the cross-sectional area of the reinforcing rib 2423 gradually increases along the direction close to the first through-hole 241. This is because the position of the mounting plate 24 close to the first through-hole 241 is the most prone to fracture. Therefore, the cross-sectional area of the reinforcing rib 2423 can be gradually increased along the direction close to the first through-hole 241, so as to specifically improve the strength of the mounting plate 24 at the position close to the first through-hole 241.

[0128] In the embodiments of the present application, by gradually increasing the cross-sectional area of the reinforcing rib 2423 along the direction close to the first through-hole 241, the reinforcing rib 2423 close to the first through-hole 241 can have higher strength, thereby reducing the probability of fracture of the mounting plate 24 near the first through-hole 241.

[0129] It should be noted that there is a gap between two adjacent reinforcing ribs 2423, and the gas discharged by the pressure relief mechanism 11 can be discharged into the accommodation space 23 of the battery device 100 through the gap, so as to facilitate the discharge of gas from the battery device 100.

[0130] In some embodiments of the present application, such as Figure 3 and Figure 5 as shown, at least two first through-holes 241 are provided on the mounting plate 24, and each first through-hole 241 is disposed opposite to a pressure relief mechanism 11 respectively; a reinforcing member 242 is disposed on the outer circumference of each first through-hole 241, and each reinforcing member 242 surrounds one through-hole.

[0131] It should be noted that one pressure relief mechanism 11 is provided on each battery cell 10. Therefore, the first through-hole 241 only needs to be disposed opposite to the pressure relief mechanism 11. Considering that the battery device 100 includes a plurality of battery cells 10, the number of pressure relief mechanisms 11 is also plural. Therefore, the number of first through-holes 241 is also plural, and each first through-hole 241 is disposed opposite to a pressure relief mechanism 11 respectively. A reinforcing member 242 is disposed on the outer circumference of each first through-hole 241, and each reinforcing member 242 surrounds one through-hole.

[0132] It can be understood that when two or more pressure relief mechanisms 11 are provided on the battery cell 10, the number of first through-holes 241 also needs to be increased accordingly, so that each pressure relief mechanism 11 can be disposed opposite to a first through-hole 241. This will not be elaborated here.

[0133] In an embodiment of the present application, at least two first through holes 241 are provided on the mounting plate 24, and each first through hole 241 is disposed opposite to a pressure relief mechanism 11; a reinforcing member 242 is respectively disposed on the outer circumference of each first through hole 241, and each reinforcing member 242 surrounds one through hole. Then, the position of the first through hole 241 can be set according to the position of the pressure relief mechanism 11, and the position of the reinforcing member 242 can be set according to the position of the first through hole 241, so as to increase the strength of the mounting plate 24 on the outer circumference of each first through hole 241, thereby improving the overall strength of the mounting plate 24.

[0134] In some embodiments of the present application, the mounting plate 24 includes a magnesium alloy member.

[0135] It should be noted that the mounting plate 24 here is made of magnesium alloy, that is to say, the mounting plate 24 is a magnesium alloy member.

[0136] In the embodiment of the present application, by including a magnesium alloy member in the mounting plate 24, the advantage of the relatively small density of magnesium alloy can be fully utilized, so that the mounting plate 24 made of the magnesium alloy member is lighter in weight, and can effectively reduce the weight of the box body 20 of the battery device 100, thereby improving the endurance mileage of the electrical equipment. In addition, the magnesium alloy member also has good heat dissipation performance, and can quickly dissipate the heat generated by the battery device 100 to the outside, thereby improving the performance and service life of the battery device 100. In addition, the magnesium alloy member also has excellent shock absorption performance, and can effectively absorb vibration and impact to protect the battery device 100 from damage.

[0137] Optionally, the second box body 22 can be a magnesium alloy member or an aluminum alloy member, which can play a role in heat dissipation.

[0138] Optionally, the projection of the pressure relief mechanism 11 on the mounting plate 24 is within the contour line of the first through hole 241.

[0139] The projection of the pressure relief mechanism 11 on the mounting plate 24 mentioned here refers to the orthographic projection of the pressure relief mechanism 11 facing the mounting plate 24, and the orthographic projection is entirely within the contour line of the first through hole 241. That is to say, the area of the first through hole 241 is larger than the area of the pressure relief mechanism 11.

[0140] In the embodiment of the present application, by the projection of the pressure relief mechanism 11 on the mounting plate 24 being within the contour line of the first through hole 241, the gas discharged by the pressure relief mechanism 11 can flow into the first through hole 241 as soon as possible, achieving the effect of rapid exhaust.

[0141] In some embodiments of the present application, along the direction from the first box body 21 to the battery cell 10, the size of the reinforcing member 242 is in the range of 3 mm to 10 mm, such as 3 mm, 3.5 mm, 4 mm, 5 mm, 7 mm, 8 mm, 9 mm or 10 mm, etc.

[0142] The size of the reinforcing member 242 mentioned here is the size of the reinforcing member 242 along the Z-Z direction, that is, the size of the reinforcing member 242 along the height direction.

[0143] In the embodiments of the present application, by setting the size of the reinforcing member in the range of 3 mm to 10 mm along the direction from the first box body 21 to the battery cell 10, the strength of the mounting plate 24 can be increased through the reinforcing member 242. There will be no situation where the size of the reinforcing member 242 is too small to result in a small increase in strength, nor will there be a situation where the size of the reinforcing member 242 is too large to cause the volume of the battery device to be too large.

[0144] In some embodiments of the present application, the size of the reinforcing member 242 is in the range of 4 mm to 6 mm, such as 4 mm, 5 mm, 5.5 mm or 6 mm, etc.

[0145] In the embodiments of the present application, by setting the size of the reinforcing member 242 in the range of 4 mm to 6 mm, the strength of the mounting plate 24 can be increased through the reinforcing member 242. There will be no situation where the size of the reinforcing member 242 is too small to result in a small increase in strength, nor will there be a situation where the size of the reinforcing member 242 is too large to cause the volume of the battery device 100 to be too large.

[0146] Furthermore, the battery cell 10 further includes a terminal 13. The terminal 13 and the pressure relief mechanism 11 are respectively arranged at opposite ends of the battery cell 10, and the pressure relief mechanism 11 faces the mounting plate 24.

[0147] Specifically, the terminal 13 is located at the top end of the battery main body 12, and the pressure relief mechanism 11 is located at the bottom end of the battery main body 12. The pressure relief mechanism 11 is located below the battery main body 12 along the height direction and along the direction of gravity.

[0148] In the embodiments of the present application, by respectively arranging the terminal 13 and the pressure relief mechanism 11 at opposite ends of the battery cell 10, and the pressure relief mechanism 11 faces the mounting plate 24, the pressure relief mechanism 11 can be arranged at the bottom end of the battery cell 10. After the battery device 100 undergoes thermal runaway, high-temperature and high-pressure gas and electrolyte can be quickly discharged through the pressure relief mechanism 11 at the bottom end, protecting the safety of the vehicle occupants, reducing the corrosion and damage to other components of the electrical equipment, and facilitating the improvement of the space utilization efficiency of the battery device 100.

[0149] The above description is only an overview of the technical solution of the present application. In order to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are hereinafter specifically exemplified.

[0150] In a first aspect of an embodiment of the present application, a battery device 100 is proposed. The battery device 100 includes a battery cell 10, and the battery cell 10 includes a pressure relief mechanism 11; a box body 20, the box body 20 includes a first box body 21 and a second box body 22, and the first box body 21 and the second box body 22 enclose an accommodation space 23 for accommodating the battery cell 10, wherein the first box body 21 is arranged below the second box body 22 along the direction of gravity; the first box body 21 is provided with a mounting plate 24, and the mounting plate 24 is provided with a first through hole 241, and the first through hole 241 is arranged opposite to the pressure relief mechanism 11; on the surface of the mounting plate 24 facing the battery cell 10, a reinforcing member 242 is provided, and at least a part of the reinforcing member 242 is arranged around the first through hole 241, and the space enclosed by the reinforcing member 242 is communicated with the first through hole 241, wherein the reinforcing member 242 is provided with a second through hole 2422, and the axial direction of the second through hole 2422 intersects with the axial direction of the first through hole 241. Further, the reinforcing member 242 has an annular structure, and the annular structure extends towards the side of the battery cell 10. Further, the annular structure includes a first flanging 2421, and the first flanging 2421 is connected to the circumferential edge of the first through hole 241. Further, the second through hole 2422 is provided on the first flanging 2421. Further, the shape of the first flanging 2421 is the same as the shape of the pressure relief mechanism 11. Further, the reinforcing member 242 includes at least two reinforcing ribs 2423, and the at least two reinforcing ribs 2423 are arranged at intervals along the circumference of the first through hole 241. Further, the at least two reinforcing ribs 2423 are radially distributed with the first through hole 241 as the center. Further, the mounting plate 24 is provided with at least two first through holes 241, and each first through hole 241 is respectively arranged opposite to a pressure relief mechanism 11; a reinforcing member 242 is respectively arranged on the circumferential outer side of each first through hole 241, and each reinforcing member 242 is arranged around one through hole. Further, the mounting plate 24 includes a magnesium alloy member. Further, the projection of the pressure relief mechanism 11 on the mounting plate 24 is within the contour line of the first through hole 241. Further, along the direction from the first box body 21 to the battery cell 10, the size of the reinforcing member 242 is in the range of 3 millimeters to 10 millimeters. Further, the size of the reinforcing member 242 is in the range of 4 millimeters to 6 millimeters. Further, the battery cell 10 further includes a terminal 13, the terminal 13 and the pressure relief mechanism 11 are respectively arranged at opposite ends of the battery cell 10, and the pressure relief mechanism 11 faces the mounting plate 24. Further, the battery device further includes an adhesive, and the adhesive is arranged in at least part of the gap between the battery cell 10 and the mounting plate 24, and an exhaust passage communicated with the second through hole is provided between the battery cell 10 and the mounting plate 24.

[0151] As described above, it is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A battery cell, the battery cell including a pressure relief mechanism; A box body, the box body including a first box body and a second box body, the first box body and the second box body being snap-connected and enclosing an accommodation space, the battery cell being disposed in the accommodation space, wherein the first box body is disposed below the second box body along the direction of gravity; An installation plate is provided in the first box body, a first through hole is provided on the installation plate, and the first through hole is disposed opposite to the pressure relief mechanism; a reinforcing member is provided on the surface of the installation plate facing the battery cell, at least part of the reinforcing member surrounds the first through hole, and the space enclosed by the reinforcing member communicates with the first through hole; Wherein, a second through hole is provided on the reinforcing member, and the axial direction of the second through hole intersects with the axial direction of the first through hole.

2. The battery device according to claim 1, wherein The reinforcing member has an annular structure, and the annular structure extends toward the side of the battery cell.

3. The battery device according to claim 2, wherein The annular structure includes a first flanging, and the first flanging is connected to the circumferential edge of the first through hole.

4. The battery device according to claim 3, wherein, The second through hole is provided on the first flanging.

5. The battery device according to claim 3, characterized in that, The shape of the first flanging is the same as the shape of the pressure relief mechanism.

6. The battery device according to claim 1, wherein The reinforcing member includes at least two reinforcing ribs, and at least two of the reinforcing ribs are spaced along the circumference of the first through hole, and the second through hole is formed between adjacent two of the reinforcing ribs.

7. The battery device according to claim 6, characterized in that, At least two of the reinforcing ribs are radially distributed with the first through hole as the center.

8. The battery device according to any one of claims 1 to 7, characterized in that, At least two of the first through holes are provided on the installation plate, and each of the first through holes is respectively disposed opposite to a pressure relief mechanism; The reinforcing member is respectively provided on the circumferential outer side of each of the first through holes, and each of the reinforcing members surrounds one of the through holes.

9. The battery device according to any one of claims 1 to 7, characterized in that, The installation plate includes a magnesium alloy member.

10. The battery device according to any one of claims 1 to 7, characterized in that, The projection of the pressure relief mechanism on the installation plate is within the contour line of the first through hole.

11. The battery device according to any one of claims 1 to 7, characterized in that, Along the direction from the first box body to the battery cell, the size of the reinforcing member is in the range of 3 millimeters to 10 millimeters.

12. The battery device according to claim 11, wherein The size of the reinforcing member is in the range of 4 millimeters to 6 millimeters.

13. The battery device according to any one of claims 1 to 7, characterized in that, The battery cell further includes a pole column, the pole column and the pressure relief mechanism are respectively disposed at opposite ends of the battery cell, and the pressure relief mechanism faces the installation plate.

14. The battery device according to claim 4, wherein The battery device further includes: An adhesive, the adhesive is disposed in at least part of the gap between the battery cell and the installation plate, and an exhaust passage communicating with the second through hole is provided between the battery cell and the installation plate.

15. An electrical device, characterized in that, Including the battery device according to any one of claims 1 to 14, the battery device being used to supply power to the electrical equipment.

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