Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment. The battery device comprises a single battery and a box body, the box body comprises a box body, a mounting beam assembly and a reinforcing part, the box body comprises a bottom plate and side walls, the side walls are connected with the bottom plate and define a containing cavity, and the single battery is arranged in the containing cavity. The mounting beam assembly is arranged on the outer side of the side wall and used for being connected with an external device, and at least one first cavity is formed in the mounting beam assembly. The reinforcing piece is arranged on the outer side of the side wall and connected with the mounting beam assembly, and the reinforcing piece and the mounting beam assembly are arranged in the first direction. According to the battery device, the mounting beam assembly is arranged to comprise the first cavity, a good buffering effect is achieved through the cavity structure, and the side face rigidity and strength of the box body are improved. The reinforcing pieces connected with the mounting beam assemblies are arranged on the outer sides of the side walls, so that the rigidity and strength of the side faces of the box body are further improved, and the increasingly harsh requirements for side collision prevention and extrusion prevention performance of the battery device are met.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to battery devices and electrical equipment. Background Technology

[0002] With the rapid development of new energy vehicle technology, consumers are demanding higher reliability and longer driving range from electric vehicles. As a key component of electric vehicles, power battery technology is rapidly iterating, leading to increased industry requirements for battery system reliability and energy density. As the load-bearing component of the power battery, the structural strength and rigidity of the battery pack determine the strength and rigidity of the battery system, and its weight affects the energy density and packing ratio of the battery system.

[0003] Traditional battery boxes have poor lateral stiffness and strength, which cannot meet the increasingly stringent requirements for side impact and crush resistance of vehicles. Utility Model Content

[0004] Therefore, it is necessary to provide a battery device and electrical equipment that improves the lateral stiffness and strength of the housing by improving the mounting beam, which is beneficial to improving the safety and reliability of the battery device.

[0005] This application provides a battery device, the battery device comprising:

[0006] Battery cell;

[0007] The enclosure includes a main body, a mounting beam assembly, and reinforcing components. The main body includes a bottom plate and side walls. The side walls are connected to the bottom plate and enclose a receiving cavity, in which individual battery cells are placed.

[0008] The mounting beam assembly is located on the outer side of the side wall for connection with external devices, and the mounting beam assembly has at least one first cavity inside;

[0009] The reinforcing member is located on the outer side of the side wall and connected to the mounting beam assembly. The reinforcing member and the mounting beam assembly are arranged along a first direction, which is the height direction of the box body.

[0010] The battery device proposed in this application uses a mounting beam assembly on the outside of the housing body, which connects to the electrical equipment to achieve installation and fixation of the housing. By configuring the mounting beam assembly to include a first cavity, the cavity structure provides excellent cushioning, greatly improving the lateral stiffness and strength of the housing. Furthermore, by providing reinforcing members connected to the mounting beam assembly on the outside of the sidewalls, and arranging the reinforcing members and the mounting beam assembly along a first direction, the lateral stiffness and strength of the housing are further enhanced while reducing space occupation, thereby ensuring that the increasingly stringent side-impact and crush-resistant performance requirements of battery devices are met.

[0011] In one embodiment, the mounting beam assembly is provided with at least two first cavities, which are arranged sequentially along a second direction, which is an angled direction to the extension plane of the sidewall.

[0012] The battery device proposed in this application improves the lateral stiffness and strength of the housing by providing at least two first cavities on the mounting beam assembly to achieve a better buffering effect.

[0013] In one embodiment, the mounting beam assembly is further provided with a second cavity, which is arranged along a first direction with the first cavity.

[0014] The battery device proposed in this application increases the arrangement range of the mounting beam assembly on the side of the box body by setting a second cavity, so as to provide more comprehensive buffer protection for the side wall.

[0015] In one embodiment, the mounting beam assembly includes a mounting beam and a support portion, each first cavity is formed inside the mounting beam, one end of the support portion is connected to the mounting beam, and the other end of the support portion is connected to the bottom plate or side wall, and the support portion, side wall and mounting beam enclose a second cavity.

[0016] The battery device proposed in this application reduces the weight of the support portion by setting the support portion as part of the second cavity and forming the second cavity through cooperation with the mounting beam and side wall.

[0017] In one embodiment, the mounting beam and the support are an integral structure.

[0018] The battery device proposed in this application embodiment, by setting the mounting beam and the support part as an integral structure, can be integrally formed by stamping sheet metal, which is quick to process and has good structural strength.

[0019] In one embodiment, the mounting beam assembly surrounds multiple sides of the box body, and the first cavity extends through the mounting beam assembly along the surrounding direction of the mounting beam assembly.

[0020] The battery device proposed in this application provides continuous protection on multiple sides of the box body by setting a mounting beam assembly around it and setting a first cavity through the mounting beam assembly. When the multiple sides of the box body are squeezed and collided, the mounting beam assembly can provide buffer protection by deforming the cavity.

[0021] In one embodiment, the box body includes four side walls connected in sequence, and the mounting beam assembly surrounds at least three of the side walls.

[0022] The battery device proposed in this application embodiment is typically designed to protect the three side walls from compression or impact when installed in electrical equipment. By setting up a mounting beam assembly around at least three side walls, effective protection is provided for the side walls that are susceptible to compression or impact.

[0023] In one embodiment, a third cavity is provided within the reinforcing member.

[0024] The battery device proposed in this application improves the buffering effect by setting the reinforcing member as a cavity structure, thereby enhancing the anti-side impact and anti-squeeze performance of the housing.

[0025] In one embodiment, the reinforcing member and the mounting beam assembly enclose a third cavity.

[0026] The battery device proposed in this application uses a reinforcing member and a mounting beam assembly to form a third cavity, which reduces the amount of material used in the reinforcing member or mounting beam assembly, and helps to reduce the weight of the housing and the processing cost.

[0027] In one embodiment, the reinforcing member surrounds multiple sides of the housing body, and the third cavity penetrates the reinforcing member along the surrounding direction of the reinforcing member.

[0028] The battery device proposed in this application provides continuous protection on multiple sides of the sidewall by setting a through third cavity. When any point on any of the multiple sides of the housing is squeezed or collided, the reinforcing member can provide buffer protection by deforming the cavity.

[0029] In one embodiment, the box body includes four side walls connected in sequence, and reinforcements surround at least three of the side walls.

[0030] The battery device proposed in this application embodiment is typically designed to protect the three side walls from compression or impact when installed in an electrical appliance. By providing reinforcing members around at least three side walls, effective protection is provided for the side walls that are susceptible to compression or impact.

[0031] In one embodiment, the box body further includes a flange connected to the side wall and extending outward from the receiving cavity, and a reinforcement is connected to the bottom side of the flange.

[0032] The battery device proposed in this application provides a flange, which facilitates the connection between the housing body and the reinforcing member. On the other hand, when the reinforcing member is connected to the bottom side of the flange, it provides an upward supporting force to the flange. Compared with the connection method where the reinforcing member is only connected to the side wall, the stress at the connection point between the reinforcing member and the side wall can be reduced.

[0033] In one embodiment, the sum of the heights of the reinforcing member and the mounting beam assembly is not less than the height of the box body.

[0034] The battery device proposed in this application ensures that the sum of the heights of the reinforcing members and the mounting beam assembly is not less than the height of the housing body, thereby ensuring that the reinforcing members and the mounting beam assembly cover three sides of the sidewall and thus providing good protection for the sidewall.

[0035] This application also provides an electrical device, which includes the battery device described above.

[0036] The electrical equipment proposed in this application improves its anti-side impact and anti-crushing performance by adopting the above-mentioned battery device, which is beneficial to improving safety performance. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application.

[0038] Figure 2 This is a schematic diagram of the structure of a battery device provided in one embodiment of this application.

[0039] Figure 3 This is a schematic diagram of the structure of the box provided in one embodiment of this application from one viewpoint.

[0040] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0041] Figure 5 This is a structural schematic diagram of the box provided in one embodiment of this application from another perspective.

[0042] Figure 6 for Figure 5 Sectional view at point BB.

[0043] Figure 7 for Figure 6 Enlarged structural diagram at point E in the middle.

[0044] Figure 8 This is a schematic diagram of the disassembly structure of the box provided in one embodiment of this application.

[0045] Figure label:

[0046] 100. Battery assembly; 200. Controller; 300. Motor;

[0047] 1. Box body; 10. Receiving cavity; 11. Bottom plate; 12. Side wall; 13. Flanged edge;

[0048] 2. Mounting beam assembly; 21. Mounting beam; 201. First cavity; 22. Support part; 202. Second cavity; 23. Mounting sleeve; 24. Connecting beam;

[0049] 3. Reinforcing component; 31. Reinforcing body; 301. Third cavity; 32. Connecting ear;

[0050] 4. Crossbeam;

[0051] 5. Battery cells. Detailed Implementation

[0052] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0053] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms 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.

[0054] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0056] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0058] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0059] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and this application is not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and this application is not limited thereto.

[0060] The battery device mentioned in this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. A battery device generally includes a housing for encapsulating one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0061] The inventors have noticed that in application environments, especially when installed in vehicles, the sides of the battery pack are extremely susceptible to collisions and compression. If the side stiffness and strength of the pack are inadequate, the pack will suffer internal damage due to collisions and compression, posing a significant safety hazard. Traditional pack structures have poor side stiffness and cannot meet the requirements for vehicle side impact performance and side compression.

[0062] In view of this, the present application provides a technical solution that improves the structural strength by setting reinforcing members on the side of the box and setting a cavity structure on the mounting beam assembly to improve the buffering effect, thereby improving the side stiffness and strength of the box and thus enhancing the side impact and crush resistance of vehicles and other electrical equipment.

[0063] Please see Figure 1 , Figure 1 A schematic diagram of a vehicle structure provided in one embodiment of this application is shown. A battery device 100 is disposed inside the vehicle, and the battery device 100 may be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source.

[0064] The vehicle may also include a controller 200 and a motor 300, the controller 200 being used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle during starting, navigation and driving.

[0065] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0066] In the battery device 100, there can be one or more battery cells. If there are multiple battery cells, they can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells are connected in both series and parallel.

[0067] The inventors have noted that when the battery device 100 is installed in a vehicle, because the size of the battery device 100 is much smaller than the size of the vehicle frame, when the battery device 100 is installed at the front or rear of the vehicle, there are generally only three sides where it is subject to compression or collision. Therefore, improving the anti-collision and anti-compression capabilities of the battery device 100 around the three sides of the battery device 100 can meet the safety performance requirements of the battery device 100.

[0068] Based on the above considerations, please refer to Figures 2-4 , Figure 2 A schematic diagram of the structure of a battery device 100 provided in one embodiment of this application is shown; Figure 3 This illustration shows a structural schematic diagram of the box provided in one embodiment of the present application from one perspective; Figure 4 It shows Figure 3Enlarged structural view at point A. This application provides a battery device 100, which includes a battery cell 5 and a housing. The housing includes a housing body 1, a mounting beam assembly 2, and a reinforcing member 3. The housing body 1 includes a bottom plate 11 and a side wall 12. The side wall 12 is connected to the bottom plate 11 and encloses a receiving cavity 10, in which the battery cell 5 is disposed. The mounting beam assembly 2 is disposed on the outside of the side wall 12 for connection to an external device. At least one first cavity 201 is disposed inside the mounting beam assembly 2. The reinforcing member 3 is disposed on the outside of the side wall 12 and connected to the mounting beam assembly 2. The reinforcing member 3 and the mounting beam assembly 2 are arranged along a first direction, which is the height direction of the housing body 1, i.e. Figure 7 The Z direction is shown in the diagram.

[0069] The enclosure proposed in this application uses a mounting beam assembly 2 on the outer side of the enclosure body 1, which is connected to the electrical equipment to achieve installation and fixation of the enclosure. By configuring the mounting beam 21 to include a first cavity 201, the cavity structure provides a good buffering effect, greatly improving the lateral stiffness and strength of the enclosure. By providing a reinforcing member 3 connected to the mounting beam assembly 2 on the outer side of the side wall 12, and arranging the reinforcing member 3 and the mounting beam assembly 2 along the Z direction, the lateral stiffness and strength of the enclosure are further improved while reducing space occupation, thereby ensuring that the increasingly stringent side impact and crush resistance performance requirements of the battery device 100 are met.

[0070] In this embodiment, the battery cell 5 may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and is not limited thereto in this embodiment. The battery cell 5 may be cylindrical, flat, cuboid, or other shapes, etc., and is not limited thereto in this application.

[0071] In one embodiment, such as Figures 4-7 As shown, where, Figure 5 This illustration shows a structural schematic diagram of the box provided in one embodiment of the present application from another perspective; Figure 6 for Figure 5 Sectional view at point BB; Figure 7 for Figure 6 Enlarged structural diagram at point E. The mounting beam assembly 2 is provided with at least two first cavities 201, which are arranged sequentially along a second direction that forms an angle with the extending plane of the side wall 12. By providing at least two first cavities 201 on the mounting beam assembly 2, a better buffering effect is achieved, thereby further improving the lateral stiffness and strength of the box.

[0072] Since the compression or impact on the housing typically originates from the direction of the vertical sidewall 12, therefore, in one embodiment, as Figure 3As shown, at least two first cavities 201 are arranged along the direction perpendicular to the sidewall 12 to achieve a better cushioning effect. Specifically, at least two first cavities 201 are arranged along... Figure 3 Arranged in the Y direction. The Y direction is the width direction of the box body 1, and the width direction of the box body 1 is consistent with the width direction of the vehicle.

[0073] Optionally, two first cavities 201 are provided, which provide double protection for the sides of the enclosure, achieving a better buffering and protection effect. In some other embodiments, three or more first cavities 201 can be provided for even better protection. In actual working conditions, the appropriate number of first cavities 201 can be selected according to the application environment and protection requirements of the enclosure.

[0074] like Figure 4 As shown, in order to fix the mounting beam assembly 2, a mounting sleeve 23 is provided on the mounting beam assembly 2, and the mounting beam assembly 2 is connected to the electrical equipment by the mounting sleeve 23. Optionally, the mounting sleeve 23 is located in the first cavity 201 away from the side wall 12.

[0075] In one embodiment, please refer to Figure 7 The mounting beam assembly 2 also includes a second cavity 202, which is arranged along a first direction with the first cavity 201. The first direction is the height direction of the box body 1, as detailed below. Figure 4 In the Z-direction. By setting a second cavity 202, the arrangement range of the mounting beam assembly 2 on the side of the box body 1 is increased, so as to provide more comprehensive buffer protection for the side wall 12.

[0076] Optionally, combined Figure 4 and Figure 7 As shown, the mounting beam assembly 2 includes a mounting beam 21 and a support portion 22. Each first cavity 201 is formed inside the mounting beam 21. One end of the support portion 22 is connected to the mounting beam 21, and the other end of the support portion 22 is connected to the base plate 11 or the side wall 12. The support portion 22, the side wall 12, and the mounting beam 21 enclose a second cavity 202. By setting the support portion 22 as part of the second cavity 202, and utilizing its cooperation with the mounting beam 21 and the side wall 12 to form the second cavity 202, it is beneficial to reduce the weight of the support portion 22 itself.

[0077] In one embodiment, one end of the support portion 22 is connected to a first cavity 201 near the side wall 12, such that the second cavity 202 is located below the first cavity 201 near the side wall 12.

[0078] For ease of processing, the mounting beam 21 and the support part 22 are designed as an integral structure, which can be integrally formed by stamping from sheet metal, specifically aluminum alloy sheet. The two first cavities 201 have rectangular cross-sections. One end of the sheet metal serves as a partition between the two first cavities 201, and the other end is bent to form the support part 22. The end of the support part 22 is welded or bonded to the bottom of the base plate 11, providing support for the base plate 11 and making the box more securely fixed. Additionally, the mounting beam 21 can also be connected to the side wall 12 by welding or bonding.

[0079] Optionally, please refer to Figure 3 and Figure 8 , Figure 8 A schematic diagram of the disassembled structure of the box body provided in one embodiment of this application is shown. The mounting beam assembly 2 surrounds multiple sides of the box body 1. A first cavity 201 penetrates the mounting beam assembly 2 along its surrounding direction, and a second cavity 202 penetrates the support portion 22 along its surrounding direction, so that the first cavity 201 and the second cavity 202 continuously surround the sidewall 12. By setting the mounting beam assembly 2 to surround multiple sides of the box body 1, and setting the first cavity 201 to penetrate the mounting beam assembly 2 and the second cavity 202 to penetrate the support portion 22, continuous protection is formed on multiple sides of the sidewall 12. When multiple sides of the box body are subjected to compression and collision, the mounting beam assembly 2 can provide buffer protection through cavity deformation.

[0080] In one embodiment, the housing body 1 includes four side walls 12 connected in sequence, and the mounting beam assembly 2 surrounds at least three of the side walls 12. When the battery device 100 is installed in an electrical device such as a vehicle, the three side walls 12 are usually easily squeezed or impacted. By setting the mounting beam assembly 2 to surround at least three side walls 12, effective protection is provided for the side walls that are easily squeezed or impacted.

[0081] To ensure the secure installation of the enclosure, such as Figure 3 and Figure 4 As shown, the mounting beam assembly 2 also includes a connecting beam 24, which is located on the fourth side of the box body 1 that is not surrounded by the mounting beam 21. The connecting beam 24 is also provided with a mounting sleeve 23 for connecting with the electrical equipment, thereby forming connection and fixing points on all four sides of the box body 1, thus ensuring that the box is securely installed in the electrical equipment.

[0082] like Figures 3-7 As shown, the reinforcing member 3 is arranged along the extension direction of the mounting beam assembly 2, surrounding the three sides of the side wall 12 and extending to the fourth side. The two ends of the reinforcing member 3 are respectively supported and connected to the two connecting beams 24.

[0083] In one embodiment, such as Figure 7As shown, a third cavity 301 is provided inside the reinforcing member 3. By setting the reinforcing member 3 as a cavity structure, the buffering effect is further improved, thereby enhancing the box's anti-side impact and anti-squeeze performance.

[0084] Optionally, the reinforcing member 3 and the mounting beam assembly 2 form a third cavity 301. By forming the third cavity 301 through the cooperation of the reinforcing member 3 and the mounting beam assembly 2, the material used for the reinforcing member 3 or the mounting beam assembly 2 is reduced, which helps to reduce the weight of the box and the processing cost.

[0085] Alternatively, please refer to Figure 3 and Figure 8 The reinforcing member 3 surrounds multiple sides of the box body 1, and the third cavity 301 penetrates the reinforcing member 3 along the surrounding direction of the reinforcing member 3, so that the third cavity 301 continuously surrounds the side wall 12, forming continuous protection on multiple sides of the side wall 12. When any point on any of the multiple sides of the box body is subjected to compression and collision, the reinforcing member 3 can provide buffer protection by deforming the cavity. The third cavity 301 cooperates with the first cavity 201 and the second cavity 202 on the mounting beam assembly 2 to form a buffer protection of four cavities outside the side wall 12. When any point on any of the multiple sides of the box body is subjected to compression and collision, the mounting beam assembly 2 can provide buffer protection by deforming the cavity.

[0086] Specifically, the reinforcing member 3 is provided around at least three side walls 12. When the battery device is installed in an electrical appliance, the three side walls are usually susceptible to compression or impact. By providing the reinforcing member 3 around at least three side walls 12, effective protection is provided for the side walls that are susceptible to compression or impact.

[0087] In one embodiment, such as Figure 7 As shown, the sum of the heights of the reinforcing member 3 and the mounting beam assembly 2 is not less than the height of the box body 1, so as to ensure that the reinforcing member 3 and the mounting beam assembly 2 cover the side wall 12 in the height direction, thereby ensuring a good protective effect on the side wall 12.

[0088] To facilitate the fixing of the reinforcing member 3, such as Figure 4 and Figure 7 As shown, the box body 1 also includes a flange 13, which is connected to the side wall 12 and extends outward from the receiving cavity 10. The reinforcing member 3 is connected to the bottom side of the flange 13. By providing the flange 13, on the one hand, it facilitates the connection between the box body 1 and the reinforcing member 3; on the other hand, when the reinforcing member 3 is connected to the bottom side of the flange 13, it will provide an upward supporting force to the flange 13. Compared with the connection method where the reinforcing member 3 is only connected to the side wall 12, it can reduce the force at the connection point between the reinforcing member 3 and the side wall 12.

[0089] In one embodiment, the upper side surface of the reinforcement member 3 is welded or adhered to the bottom side of the flanging 13, the side surface of the reinforcement member 3 is welded or adhered to the side wall 12, and the reinforcement member 3 and the mounting beam assembly 2 are also connected by welding or adhesion.

[0090] Specifically, as shown in Figure 4 and Figure 8 , the reinforcement member 3 includes a reinforcement main body 31 and a plurality of connecting ears 32. The reinforcement main body 31 is arranged in an inverted U shape, and the reinforcement main body 31 and the mounting beam assembly 2 enclose the aforementioned third cavity 301. The top surface of the reinforcement main body 31 is connected to the flanging 13 of the box body 1, one side surface of the reinforcement main body 31 is adhesively connected to the side wall 12, and a plurality of connecting ears 32 are arranged at intervals along the edge of the other side surface of the reinforcement main body 31. The connecting ears 32 are connected to the upper surface of the mounting beam assembly 2. Optionally, the reinforcement main body 31 and the plurality of connecting ears 32 are arranged as an integral structure.

[0091] In one embodiment, as shown in Figure 3 and Figure 4 , the side wall of the reinforcement main body 3 connected to the connecting ears 32 is provided with a hollow, which is divided into a plurality of spaced connecting walls. The width of each connecting wall is the same as the width of the corresponding connecting ear 32 connected thereto. Of course, the width of each connecting wall can also be greater than or less than the width of the corresponding connecting ear 32 connected thereto. In some other embodiments, the side wall of the reinforcement main body 3 connected to the connecting ears 32 can also be set as a continuous side surface.

[0092] As shown in Figure 2 and Figure 3 , in order to improve the structural strength of the box body 1, the box body further includes at least one cross beam 4. The cross beam 4 is arranged in the accommodation cavity 10 of the box body 1 and is fixedly connected to the bottom plate 11 and / or the side wall 12. When there are multiple cross beams 4, the multiple cross beams 4 are arranged at intervals. The cross beam 4 divides the accommodation cavity 10 into small accommodation spaces, and the battery cells 5 are accommodated in each accommodation space.

[0093] [[ID=2)], the box body 1, the mounting beam assembly 2, the reinforcement member 3 and the cross beam 4 are connected as a whole to form a "mouth" - shaped, "day" - shaped or even "eye" - shaped frame structure that restricts and reinforces each other. This frame structure forms the main bearing component for resisting side collisions or side squeezes, avoids or reduces damage to the battery cells 5 caused by external forces, and is beneficial to improving the safety and reliability of the battery device 100.

[0094] The embodiment of the present application further provides an electrical device. The electrical device includes the battery device 100 as described above, and the battery device 100 is installed in the electrical device through the mounting beam assembly 2. The electrical device can specifically be an energy storage power system, an electric vehicle, military equipment, aerospace, etc.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, The battery device includes: Battery cell (5); The box body includes a box body (1), a mounting beam assembly (2) and a reinforcing member (3). The box body (1) includes a bottom plate (11) and a side wall (12). The side wall (12) is connected to the bottom plate (11) and encloses a receiving cavity (10). The battery cell (5) is disposed in the receiving cavity (10). The mounting beam assembly (2) is disposed on the outside of the side wall (12) for connection with external devices, and the mounting beam assembly (2) has at least one first cavity (201) inside. The reinforcing member (3) is disposed on the outside of the side wall (12) and connected to the mounting beam assembly (2). The reinforcing member (3) and the mounting beam assembly (2) are arranged along a first direction, which is the height direction of the box body (1).

2. The battery device according to claim 1, characterized in that, The mounting beam assembly (2) is provided with at least two first cavities (201), and the at least two first cavities (201) are arranged sequentially along a second direction, which is a direction that forms an angle with the extension plane of the side wall (12).

3. The battery device according to claim 2, characterized in that, The mounting beam assembly (2) is further provided with a second cavity (202), which is arranged along the first cavity (201) in the first direction.

4. The battery device according to claim 3, characterized in that, The mounting beam assembly (2) includes a mounting beam (21) and a support part (22). Each first cavity (201) is formed inside the mounting beam (21). One end of the support part (22) is connected to the mounting beam (21), and the other end of the support part (22) is connected to the bottom plate (11) or the side wall (12). The support part (22), the side wall (12) and the mounting beam (21) enclose the second cavity (202).

5. The battery device according to claim 4, characterized in that, The mounting beam (21) and the support part (22) are an integral structure.

6. The battery device according to claim 1, characterized in that, The mounting beam assembly (2) surrounds multiple sides of the box body (1), and the first cavity (201) penetrates the mounting beam assembly (2) along the surrounding direction of the mounting beam assembly (2).

7. The battery device according to claim 6, characterized in that, The box body (1) includes four side walls (12) connected in sequence, and the mounting beam assembly (2) is surrounded by at least three of the side walls (12).

8. The battery device according to any one of claims 1-7, characterized in that, The reinforcing member (3) is provided with a third cavity (301).

9. The battery device according to claim 8, characterized in that, The reinforcing member (3) and the mounting beam assembly (2) enclose the third cavity (301).

10. The battery device according to claim 8, characterized in that, The reinforcing member (3) surrounds multiple sides of the box body (1), and the third cavity (301) penetrates the reinforcing member (3) along the surrounding direction of the reinforcing member (3).

11. The battery device according to claim 10, characterized in that, The box body (1) includes four side walls (12) connected in sequence, and the reinforcing member (3) surrounds at least three of the side walls (12).

12. The battery device according to any one of claims 1-7, characterized in that, The box body (1) also includes a flange (13), which is connected to the side wall (12) and extends outward to the receiving cavity (10), and the reinforcing member (3) is connected to the bottom side of the flange (13).

13. The battery device according to any one of claims 1-7, characterized in that, The sum of the heights of the reinforcing member (3) and the mounting beam assembly (2) is not less than the height of the box body (1).

14. An electrical appliance, characterized in that, The electrical equipment includes the battery device as described in any one of claims 1-13.

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