Battery device and electric device
By setting an energy-absorbing structure in the intersecting area of the battery pack casing, the problem of damage to the battery pack caused by drops during assembly is solved, improving the yield rate and drop resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2024-11-20
- Publication Date
- 2026-05-22
AI Technical Summary
Existing battery devices are prone to damage to the casing and internal battery management components due to drops during assembly, affecting the yield rate.
An energy-absorbing structure is installed at the intersection of the battery casing and the battery pack. This structure can buffer and absorb energy, reducing damage to the battery management device during a drop.
It improved the yield rate of the battery device, enhanced its drop resistance, and protected the casing and internal battery management components.
Smart Images
Figure CN122073296A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical device. Background Technology
[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.
[0003] In the development of battery technology, improving the yield rate of battery devices is a research direction. Summary of the Invention
[0004] This application provides a battery device and an electrical device that can improve the yield rate of the battery device.
[0005] This application provides a battery device, including a battery cell assembly and a battery management device. The battery cell assembly includes multiple battery cells. The battery management device includes a battery management component, a housing, and an energy-absorbing structure. The battery management component is used to manage and monitor the battery cell assembly. The housing includes multiple walls that form a housing space for accommodating the battery management component. At least three of the multiple walls intersect each other in their extension directions to form an intersection area. At least a portion of the energy-absorbing structure is disposed in the intersection area and connected to the housing.
[0006] In the above technical solution, the battery device of this application embodiment sets at least part of the energy-absorbing structure in the intersecting area. The energy-absorbing structure can play the role of buffering and absorbing energy. If the battery management device falls during assembly, the energy-absorbing structure located in the intersecting area can reduce the possibility of damage to the outer shell and the internal battery management components, thereby improving the yield of the battery device.
[0007] In some embodiments, at least three of the plurality of walls are connected in pairs to form an intersecting region, and at least part of the energy-absorbing structure is disposed on the side of at least one wall where the intersecting region is located away from the receiving space.
[0008] In the above technical solution, at least part of the energy-absorbing structure is disposed on the outer surface of at least one wall in the intersecting area, and the energy-absorbing structure directly protects the intersecting area, which has a better effect.
[0009] In some embodiments, the energy-absorbing structure encloses the three walls where the intersecting region is located.
[0010] The above technical solution can provide good protection for the intersecting areas and further improve the drop resistance of the battery management device.
[0011] In some embodiments, the housing has at least eight intersecting regions, the energy-absorbing structure encloses two adjacent intersecting regions, and covers at least one of the two walls located between the two intersecting regions.
[0012] In the above technical solution, not only is the intersecting area protected, but the wall connecting the two intersecting areas 23 is also protected.
[0013] In some embodiments, the housing includes two first walls, two second walls, and two third walls. The two first walls are arranged opposite each other along a first direction, the two second walls are arranged opposite each other along a second direction, and the two third walls are arranged opposite each other along a third direction. The first direction, the second direction, and the third direction intersect each other. The area of the first wall is greater than the area of the second wall, and the area of the second wall is greater than or equal to the area of the third wall. One of the first walls, one of the second walls, and one of the third walls enclose a first intersecting region, and one of the first walls, one of the third walls, and another second wall enclose a second intersecting region. The energy-absorbing structure surrounds the first intersecting region and the second intersecting region, and covers the first wall and the third wall located between the first intersecting region and the second intersecting region.
[0014] In the above technical solution, the energy-absorbing structure provides good protection for both walls located between the first and second intersection regions, further improving the drop resistance of the battery management device.
[0015] In some embodiments, the housing includes a base and a cover, the base having an opening, the cover closing onto the opening, the cover and the base enclosing a receiving space, the base having multiple intersecting regions, and a single energy-absorbing structure enclosing all intersecting regions of the base.
[0016] In the above technical solution, the protective effect of the energy-absorbing structure on the outer shell is further improved, and the drop resistance of the battery management device is enhanced.
[0017] In some embodiments, the energy-absorbing structure encloses each surface of the base away from the receiving space.
[0018] In the above technical solution, the seat is easily damaged during a fall. Therefore, fully covering the seat can further improve the protection of the seat and enhance the drop resistance of the battery management device.
[0019] In some embodiments, the outer casing includes two first walls, two second walls, and two third walls. The two first walls are arranged opposite each other along a first direction, the two second walls are arranged opposite each other along a second direction, and the two third walls are arranged opposite each other along a third direction. The first direction, the second direction, and the third direction intersect each other. The area of the first wall is greater than the area of the second wall, and the area of the second wall is greater than or equal to the area of the third wall. The energy-absorbing structure includes a first energy-absorbing wall, a second energy-absorbing wall, and a third energy-absorbing wall that intersect each other. The second energy-absorbing wall is attached to the second wall, and the third energy-absorbing wall is attached to the third wall. The first wall has a clearance portion, and the first energy-absorbing wall fills the entire clearance portion.
[0020] In the above technical solution, when the battery management device is dropped, since the first energy-absorbing wall fills the first wall body, the first energy-absorbing wall bears more force and reduces the force on the first wall body, thus forming a good protective effect on the first wall body and improving the drop resistance of the battery management device.
[0021] In some embodiments, one of the energy-absorbing structure and the housing has a protrusion and the other has a recess, with the protrusion and recess engaging in a convex-concave fit.
[0022] In the above technical solution, the energy-absorbing structure and the outer shell can be connected more tightly, and the energy-absorbing structure is less likely to fall off.
[0023] In some embodiments, the energy-absorbing structure is a cushioning pad.
[0024] In the above technical solution, the cushioning pad can effectively absorb the force generated during a drop, giving the battery management device better drop resistance.
[0025] In some embodiments, the outer shell includes two first walls disposed opposite each other along a first direction, two second walls disposed opposite each other along a second direction, and two third walls disposed opposite each other along a third direction. The first direction, the second direction, and the third direction intersect each other. The area of the first wall is greater than the area of the second wall, and the area of the second wall is greater than or equal to the area of the third wall. The energy-absorbing structure includes a peripheral wall that surrounds the outer shell. The surrounding direction of the peripheral wall intersects with the first direction. A portion of the outer wall of the peripheral wall is connected to the outer shell and encloses it to form an accommodating space. Another portion of the outer wall of the peripheral wall is away from the outer shell. The peripheral wall encloses and forms an energy-absorbing cavity.
[0026] In the above technical solution, the energy-absorbing structure is configured to include an energy-absorbing cavity. When the battery management device is dropped, the energy-absorbing cavity can effectively absorb the energy generated by the impact, thus giving the battery management device better drop resistance.
[0027] In some embodiments, the energy-absorbing structure extends from one end of the second wall to the other end of the second wall along a first direction, and at least one second wall and at least one third wall are connected by the energy-absorbing structure.
[0028] In the above technical solution, the energy-absorbing structure is not limited to the intersecting area, but extends along the first direction to the entire second wall, further improving the drop resistance of the battery management device.
[0029] In some embodiments, the energy-absorbing structure further includes a first reinforcing rib located inside the energy-absorbing cavity. The first reinforcing rib is connected to the peripheral wall and extends along the peripheral wall from the outer wall of the receiving space to the direction away from the outer wall of the receiving space.
[0030] In the above technical solution, a first reinforcing rib is provided to enhance the strength of the energy-absorbing structure, reduce deformation during collision, and improve its impact resistance.
[0031] In some embodiments, the first direction is the height direction, and the bottom end of the energy-absorbing structure protrudes from the first wall located on the bottom side along the first direction.
[0032] In the above technical solution, when the first wall located on the bottom side is subjected to a collision, the energy-absorbing structure can share the force, reduce the stress on the first wall, and improve the drop resistance of the battery management device.
[0033] In some embodiments, the energy-absorbing structure further includes a base plate and a second reinforcing rib. The base plate is connected to the peripheral wall and forms an energy-absorbing cavity with the peripheral wall. The second reinforcing rib is connected to the base plate and located on the side of the base plate away from the energy-absorbing cavity. The second reinforcing rib extends along the peripheral wall from the outer wall of the receiving space to the direction away from the outer wall of the receiving space, and protrudes from the first wall located on the bottom side in a first direction. The end of the second reinforcing rib away from the receiving space is connected to the outer wall of the peripheral wall away from the receiving space.
[0034] In the above technical solution, when the energy-absorbing structure is impacted from either the side or the bottom, the second reinforcing rib can share the force, thereby improving the impact resistance of the energy-absorbing structure.
[0035] In some embodiments, at least three of the plurality of walls are connected in pairs to form an intersecting region, and the energy-absorbing structure includes a groove formed by the recess of at least one wall where the intersecting region is located into the receiving space.
[0036] In the above technical solution, when the intersecting areas of the battery management device are impacted, the groove can act as a buffer to reduce the damage to the outer casing.
[0037] In some embodiments, the housing includes two first walls disposed opposite each other along a first direction, two second walls disposed opposite each other along a second direction, and two third walls disposed opposite each other along a third direction. The first direction, the second direction, and the third direction intersect each other. The area of the first wall is greater than the area of the second wall, and the area of the second wall is greater than or equal to the area of the third wall. The first wall, the second wall, and the third wall forming an intersecting area are all recessed into the receiving space to form a continuous groove.
[0038] In the above technical solution, setting the groove to be continuous can further improve the buffering effect and reduce the damage to the shell during collision.
[0039] In some embodiments, the housing includes a cover and a seat, the seat having an opening, the cover closing onto the opening, the cover and the seat surrounding to form an accommodating space, the seat including two second walls, two third walls and a first wall, a peripheral wall disposed on the seat, the peripheral wall, the second walls and the third walls being integrally formed.
[0040] In the above technical solution, the peripheral wall, the second wall and the third wall are made into one piece, which is convenient to manufacture and has a better energy absorption effect.
[0041] Secondly, embodiments of this application also provide an electrical device, including the aforementioned battery device, which is used to provide electrical energy. Attached Figure Description
[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.
[0043] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;
[0044] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;
[0045] Figure 3 This is an exploded view of the battery management device provided in some embodiments of this application;
[0046] Figure 4 A schematic diagram of the structure of the cover of a battery management device provided in some embodiments of this application;
[0047] Figure 5 Another structural schematic diagram of the cover of the battery management device provided in some embodiments of this application;
[0048] Figure 6 for Figure 5 Enlarged view at point A;
[0049] Figure 7 A schematic diagram of the structure of the base of a battery management device provided in some embodiments of this application;
[0050] Figure 8 A partial structural schematic diagram of the housing of a battery management device provided in some embodiments of this application;
[0051] Figure 9 A partial cross-sectional view of the housing of a battery management device provided in some embodiments of this application;
[0052] Figure 10 This is a schematic diagram of another structure of the base of the battery management device provided in some embodiments of this application;
[0053] Figure 11 for Figure 10 Enlarged view at point B;
[0054] Figure 12 Another structural schematic diagram of the base of the battery management device provided in some embodiments of this application;
[0055] Figure 13 for Figure 12 Enlarged view at point C;
[0056] Figure 14 Another structural schematic diagram of the base of the battery management device provided in some embodiments of this application;
[0057] Figure 15 for Figure 14 Enlarged view at point D.
[0058] The reference numerals in the accompanying drawings for the specific embodiments are as follows:
[0059] 100. Vehicle; 200. Battery unit; 300. Controller; 400. Motor; 500. Battery cell assembly; 600. Battery management device; 700. Housing;
[0060] 1. Battery management components;
[0061] 2. Outer shell; 21. Accommodation space; 22. Wall; 221. First wall; 222. Second wall; 223. Third wall; 224. Clearance; 23. Intersecting area; 231. First intersecting area; 232. Second intersecting area; 24. Cover; 25. Base;
[0062] 3. Energy-absorbing structure; 31. First energy-absorbing wall; 32. Second energy-absorbing wall; 33. Third energy-absorbing wall; 34. Peripheral wall; 35. Energy-absorbing cavity; 36. First reinforcing rib; 37. Base plate; 38. Second reinforcing rib; 39. Groove;
[0063] 41. Convex part; 42. Concave part;
[0064] X, first direction; Y, second direction; Z, third direction. Detailed Implementation
[0065] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0066] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.
[0067] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.
[0068] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0069] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0070] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.
[0071] In this application, "multiple" means two or more (including two).
[0072] 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 the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.
[0073] A single battery cell includes electrode components and an electrolyte. The electrode components include a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer, which is coated on the surface of the positive current collector. The positive current collector includes a positive electrode coating area and a positive electrode tab connected to the coating area. The coating area is coated with the positive active material layer, while the tab is not. Taking a lithium-ion battery cell as an example, the positive current collector can be made of aluminum, and the positive active material layer includes the positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area. The negative electrode coating area is coated with the negative electrode active material layer, while the negative electrode tab is not coated with the negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes negative electrode active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.
[0074] A battery device typically includes a battery management unit and individual battery cells. The battery management unit monitors and manages the individual battery cells, such as monitoring their current and voltage, and controlling their charging and discharging current and voltage. The battery management unit generally consists of a battery management module and a housing. During the manufacturing process, the battery management unit needs to be assembled into the housing containing the individual battery cells. Since this assembly is mostly done manually, the battery management unit may be dropped, causing damage to the housing and the internal battery management module.
[0075] In view of this, this application provides a battery device that provides an energy-absorbing structure in at least one intersecting area of the casing. The energy-absorbing structure can buffer and absorb energy. If the battery management device falls during assembly, the energy-absorbing structure in the intersecting area can reduce the possibility of damage to the casing and the internal battery management components, thereby improving the yield of the battery device.
[0076] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.
[0077] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.
[0078] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.
[0079] like Figure 1 As shown, a battery device 200 is provided inside the vehicle 100. The battery device 200 can be located at the bottom, front, or rear of the vehicle 100. The battery device 200 can be used to power the vehicle 100; for example, the battery device 200 can serve as the operating power source for the vehicle 100.
[0080] The vehicle 100 may also include a controller 300 and a motor 400. The controller 300 is used to control the battery device 200 to supply power to the motor 400, for example, for the power needs of the vehicle 100 during startup, navigation and driving.
[0081] In some embodiments of this application, the battery device 200 can not only serve as the operating power source for the vehicle 100, but also as the driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.
[0082] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application. Figure 3This is an exploded view of the battery management device provided in some embodiments of this application. Figure 4 This is a schematic diagram of the structure of the cover of a battery management device provided in some embodiments of this application. Figure 5 This is another structural schematic diagram of the cover of the battery management device provided in some embodiments of this application.
[0083] like Figures 2-5 As shown, this application also provides a battery device 200, including a battery cell assembly 500 and a battery management device 600. The battery management device 600 includes a battery management component 1, a housing 2, and an energy-absorbing structure 3. The battery management component 1 is used to manage and monitor the battery cell assembly 500. The housing 2 includes a plurality of walls 22, which form a receiving space 21 for accommodating the battery management component 1. At least three of the walls 22 intersect each other in their extending directions to form an intersection region 23. At least a portion of the energy-absorbing structure 3 is disposed in the intersection region 23 and connected to the housing 2.
[0084] The battery device 200 of this embodiment includes one or more battery cell assemblies 500 for providing voltage and capacity. Each battery cell assembly 500 includes multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.
[0085] In some embodiments, the battery cell assembly 500 is formed by arranging multiple battery cells; as an example, the battery cell assembly 500 can be a battery module, which is formed by arranging and fixing multiple battery cells into an independent module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.
[0086] In some embodiments, the battery device 200 may be a battery pack, which includes a housing 700 and one or more battery cell assemblies 500, the battery cell assemblies 500 being housed in the housing 700.
[0087] As an example, the battery cell assembly 500 can be a battery module, and the battery cell assembly 500 can be housed in the housing 700 by fixing the battery module in the housing 700.
[0088] As an example, the battery cell assembly 500 can also be housed in the housing 700 by directly fixing multiple battery cells to the housing 700.
[0089] As an example, the housing 700 may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing 700 to house the battery cell assembly 500. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing may be a top cover or a bottom support plate.
[0090] As an example, the housing 700 may include a top cover, a frame, and a lower support plate. The top cover and the lower support plate are respectively connected to the frame, so that the interior of the housing 700 forms an enclosed space to accommodate the battery cell assembly 500.
[0091] As an example, the housing 700 can be part of the chassis structure of the vehicle 100. For example, the top cover of the housing 700 can be at least part of the floor of the vehicle 100, or the frame of the housing 700 can be at least part of the crossbeams and longitudinal beams of the vehicle 100.
[0092] In some embodiments, battery device 200 refers to an energy storage device, which includes a housing 700, and at least one side of the housing 700 has a door. The energy storage device includes energy storage containers, energy storage cabinets, etc.
[0093] The battery management component 1 in this embodiment may include a circuit board for monitoring and managing the battery cell assembly 500.
[0094] In this embodiment, at least three of the multiple walls 22 have extension directions that intersect each other in pairs. These three extension directions can be considered as the extension directions of three planes, which intersect each other in pairs. The three walls 22 can be directly connected or connected via other components, such as the energy-absorbing structure 3.
[0095] In this embodiment, the energy-absorbing structure 3 is disposed in the intersecting region 23. The intersecting region 23 can be a corner formed by the direct intersection of three walls 22. In this case, the energy-absorbing structure 3 can be disposed on one wall 22 of the intersecting region 23, or on two walls 22 of the intersecting region 23, or on all three walls 22 of the intersecting region 23. The intersecting region 23 can also be a region formed by the intersection of the planes of the three walls 22 due to indirect connection.
[0096] The outer casing 2 of this embodiment includes a plurality of walls 22. Exemplarily, there are six walls 22 forming a cuboid structure with eight intersecting regions 23. Another exemplary embodiment shows seven walls 22 forming a pentagonal prism structure with ten intersecting regions 23. An exemplary embodiment also shows eight walls 22 forming a hexagonal prism structure with twelve intersecting regions 23.
[0097] The battery device 200 of this application embodiment provides at least a portion of the energy-absorbing structure 3 in the intersecting region 23. The energy-absorbing structure 3 can buffer and absorb energy. If the battery management device 600 falls during assembly, the energy-absorbing structure 3 located in the intersecting region 23 can reduce the possibility of damage to the outer casing 2 and the internal battery management component 1, thereby improving the yield of the battery device 200.
[0098] In some embodiments, at least three of the plurality of walls 22 are connected in pairs to form an intersecting region, and at least part of the energy-absorbing structure 3 is disposed on the side of at least one wall 22 where the intersecting region 23 is located away from the receiving space 21.
[0099] The outer shell 2 in this embodiment can be made of plastic material. The energy-absorbing structure 3 can be made of silicone, rubber, or TPE material.
[0100] In this embodiment, at least three of the multiple walls 22 are connected in pairs to form an intersecting region, that is, the three walls 22 are directly connected to form an intersecting region.
[0101] At least a portion of the energy-absorbing structure 3 in this application embodiment is disposed on the outer surface of the intersecting region 23. It can be disposed on one wall 22 of the intersecting region 23, or on two walls 22 of the intersecting region 23, or on three walls 22 of the intersecting region 23.
[0102] In this embodiment, the energy-absorbing structure 3 can be connected to the outer shell 2 by injection molding, bonding or other methods.
[0103] At least a portion of the energy-absorbing structure 3 is disposed on the outer surface of at least one wall 22 where the intersecting region 23 is located. The energy-absorbing structure 3 directly protects the intersecting region 23, which is effective.
[0104] In some embodiments, the energy-absorbing structure 3 encloses the three walls 22 where the intersecting region 23 is located.
[0105] This configuration provides good protection for the intersecting area 23, further enhancing the drop resistance of the battery management device 600.
[0106] Figure 6 for Figure 5 Enlarged view at point A.
[0107] Please see Figure 5 and Figure 6 In some embodiments, the housing 2 has at least eight intersecting regions 23, the energy-absorbing structure 3 encloses two adjacent intersecting regions 23, and covers at least one of the two walls 22 located between two adjacent intersecting regions 23.
[0108] In this embodiment, the energy-absorbing structure 3 envelops two adjacent intersecting regions 23, and covers at least one of the two walls 22 located between the two adjacent intersecting regions 23. This means that the energy-absorbing structure 3 not only envelops the three walls 22 where each intersecting region 23 is located, but also covers at least one of the two walls 22 connecting the two intersecting regions 23.
[0109] In this embodiment, the energy-absorbing structure 3 covering at least one of the two walls 22 located between the two intersecting regions 23 means that the energy-absorbing structure 3 may cover only the portion of the wall 22 located between the two intersecting regions 23, or it may cover the other portions of the wall 22.
[0110] For example, the energy-absorbing structure 3 covers two walls 22 located between two adjacent intersecting regions 23.
[0111] For example, the two intersecting regions 23 can both be located on the cover 24, or both on the seat 25, or one intersecting region 23 can be located on the cover 24 and the other intersecting region 23 can be located on the seat 25.
[0112] This configuration not only protects the intersecting areas 23, but also the wall 22 connecting the two intersecting areas 23.
[0113] In some embodiments, the outer casing 2 includes two first walls 221, two second walls 222, and two third walls 223. The two first walls 221 are arranged opposite each other along a first direction X, the two second walls 222 are arranged opposite each other along a second direction Y, and the two third walls 223 are arranged opposite each other along a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect each other. The area of the first wall 221 is larger than the area of the second wall 222, and the area of the second wall 222 is greater than or equal to the area of the third wall 223. The area; a first wall 221, a second wall 222 and a third wall 223 are arranged to form a first intersecting region 231, a second intersecting region 232 are formed by a first wall 221, a third wall 223 and another second wall 222, and the energy-absorbing structure 3 is wrapped around the first intersecting region 231 and the second intersecting region 232, and covers the first wall 221 and the third wall 223 located between the first intersecting region 231 and the second intersecting region 232.
[0114] Optionally, the first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.
[0115] For example, the first direction X is the height direction.
[0116] In this embodiment, the energy-absorbing structure 3 may only cover the portions of the first wall 221 and the third wall 223 located between the first intersection region 231 and the second intersection region 232, or it may cover other portions of the first wall 221 and the third wall 223.
[0117] When the outer shell 2 comprises upper and lower parts and both parts form openings, the two first walls 221 refer to one first wall 221 located in the upper part and the other first wall 221 located in the lower part, respectively; the two second walls 222 refer to the two second walls 222 located in the upper part or the two second walls 222 located in the lower part; the two third walls 223 refer to the two third walls 223 located in the upper part or the two third walls 223 located in the lower part.
[0118] When the outer casing 2 comprises upper and lower parts, and only one of them has an opening, then the two first walls 221 refer to one first wall 221 located in the upper part and the other first wall 221 located in the lower part, respectively; the two second walls 222 refer to the two second walls 222 located in the part with the opening; and the two third walls 223 refer to the two third walls 223 located in the part with the opening. The same applies below.
[0119] With this configuration, the energy-absorbing structure 3 provides good protection for both walls 22 located between the first intersecting region 231 and the second intersecting region 232, further improving the drop resistance of the battery management device 600.
[0120] Figure 7 This is a schematic diagram of the structure of a base for a battery management device provided in some embodiments of this application.
[0121] Please see Figure 7 In some embodiments, the housing 2 includes a base 25 and a cover 24. The base 25 has an opening, and the cover 24 closes to the opening. The cover 24 and the base 25 enclose a receiving space 21. The base 25 has a plurality of intersecting regions 23, and a single energy-absorbing structure 3 covers all the intersecting regions 23 of the base 25.
[0122] In this embodiment, the cover 24 can be a flat plate structure that is fastened to the opening. Alternatively, the cover 24 can be a structure with an opening at one end.
[0123] For example, the seat 25 has four intersecting regions 23, and a single energy-absorbing structure 3 encloses the four intersecting regions 23 of the seat 25. Here, enclosing the intersecting regions 23 refers to enclosing the three walls 22 where the intersecting regions 23 are located.
[0124] This design further enhances the protective effect of the energy-absorbing structure 3 on the outer casing 2 and improves the drop resistance of the battery management device 600.
[0125] In some embodiments, the energy-absorbing structure 3 covers each surface of the seat 25 that is away from the receiving space 21.
[0126] In this embodiment, the energy-absorbing structure 3 covering each surface of the seat 25 away from the receiving space 21 means that the entire surface of the seat 25 away from the receiving space 21 is covered by the energy-absorbing structure 3.
[0127] The seat 25 is easily damaged during a fall, so fully covering the seat 25 can further improve its protection and enhance the drop resistance of the battery management device 600.
[0128] Figure 8 This is a partial structural schematic diagram of the housing of a battery management device provided in some embodiments of this application.
[0129] Please see Figure 8 In some embodiments, the outer shell 2 includes two first walls 221, two second walls 222, and two third walls 223. The two first walls 221 are arranged opposite each other along a first direction X, the two second walls 222 are arranged opposite each other along a second direction Y, and the two third walls 223 are arranged opposite each other along a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect each other. The area of the first wall 221 is larger than the area of the second wall 222, and the area of the second wall 222 is greater than or equal to the area of the third wall 223. The energy-absorbing structure 3 includes a first energy-absorbing wall 31, a second energy-absorbing wall 32, and a third energy-absorbing wall 33 that intersect each other. The second energy-absorbing wall 32 is attached to the second wall 222, and the third energy-absorbing wall 33 is attached to the third wall 223. The first wall 221 is provided with a clearance portion 224, and the first energy-absorbing wall 31 fills the entire clearance portion 224.
[0130] Optionally, the first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.
[0131] In this embodiment, the second energy-absorbing wall 32 is attached to the second wall 222, and the third energy-absorbing wall 33 is attached to the third wall 223. The second energy-absorbing wall 32 can be connected to the second wall 222 by injection molding or by adhesive layer. The third wall 223 is also attached in the same way.
[0132] In this embodiment, the void 224 of the first wall 221 refers to the portion of the first wall 221 that is penetrated. The first energy-absorbing wall 31 fills the void 224.
[0133] With this configuration, when the battery management device 600 is dropped, since the first energy-absorbing wall 31 fills the first wall 221, the first energy-absorbing wall 31 bears more force, reducing the force on the first wall 221. Therefore, it provides good protection for the first wall 221 and improves the drop resistance of the battery management device 600.
[0134] In some embodiments, one of the energy-absorbing structure 3 and the housing 2 is provided with a protrusion 41 and the other is provided with a recess 42, with the protrusion 41 and the recess 42 engaging in a convex-concave fit.
[0135] In this embodiment, the protrusion 41 refers to a protrusion, and the recess 42 can be a groove-shaped structure or a through hole.
[0136] This design allows for a tighter connection between the energy-absorbing structure 3 and the outer shell 2, making it less likely for the energy-absorbing structure 3 to fall off.
[0137] In some embodiments, the energy-absorbing structure 3 is a cushioning pad.
[0138] The cushioning pad in this embodiment can be made of sponge, silicone, rubber or TPE material.
[0139] The cushioning pad effectively absorbs the force generated during a drop, giving the battery management device 600 good drop resistance.
[0140] Figure 10 This is a schematic diagram of another structure of the base of the battery management device provided in some embodiments of this application; Figure 11 for Figure 10 Enlarged view at point B.
[0141] Please see Figure 10 and Figure 11 In some embodiments, the outer shell 2 includes two first walls 221 arranged opposite each other along a first direction X, two second walls 222 arranged opposite each other along a second direction Y, and two third walls 223 arranged opposite each other along a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect each other. The area of the first wall 221 is larger than the area of the second wall 222, and the area of the second wall 222 is greater than or equal to the area of the third wall 223. The energy-absorbing structure 3 includes a peripheral wall 34 that surrounds the outer shell. The surrounding direction of the peripheral wall 34 intersects the first direction X. A portion of the outer wall of the peripheral wall 34 is connected to the outer shell 2 and encloses it to form an accommodating space 21. Another portion of the outer wall of the peripheral wall 34 is away from the outer shell 2. The peripheral wall 34 encloses and forms an energy-absorbing cavity 35.
[0142] Optionally, the first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.
[0143] In this embodiment, the intersecting region 23 is the area formed by the intersection of the planes of the first wall 221, the second wall 222, and the third wall 223 due to their indirect connection, and the energy-absorbing structure 3 is disposed in this region.
[0144] In this embodiment, the circumferential direction of the peripheral wall 34 intersects the first direction X, meaning that the peripheral wall 34 intersects the first direction X throughout the entire circumferential direction. Optionally, the circumferential direction of the peripheral wall 34 is perpendicular to the first direction X.
[0145] In this embodiment, a portion of the outer wall of the peripheral wall 34 is connected to the outer shell 2 and encloses it to form the receiving space 21. Another portion of the outer wall of the peripheral wall 34 is away from the outer shell 2. That is, a portion of the peripheral wall 34 close to the receiving space 21 is connected to the first wall 221, the second wall 222, and the third wall 223. This portion of the peripheral wall 34 together with the outer shell 2 forms the receiving space 21.
[0146] For example, the energy-absorbing structure 3 protrudes from the main body of the second wall 222 in the direction opposite to the receiving space 21 in the second direction Y, and protrudes from the main body of the third wall 223 in the direction opposite to the receiving space 21 in the third direction Z. Here, the main body refers to the portion of the second wall 222 and the third wall 223 that is only used for supporting and enclosing functions.
[0147] The energy-absorbing structure 3 is configured to include an energy-absorbing cavity 35. When the battery management device 600 is dropped, the energy-absorbing cavity 35 can effectively absorb the energy generated by the impact, thus giving the battery management device 600 better drop resistance.
[0148] In some embodiments, the energy-absorbing structure 3 extends from one end of the second wall 222 to the other end of the second wall 222 along a first direction X, and at least one second wall 222 and at least one third wall 223 are connected by the energy-absorbing structure 3.
[0149] In this embodiment, at least one second wall 222 and at least one third wall 223 are connected by an energy-absorbing structure 3. When one second wall 222 and two third walls 223 or two second walls 222 and one third wall 223 are connected by an energy-absorbing structure 3, the number of energy-absorbing structures 3 is two. When both second walls 222 and two third walls 223 are connected by an energy-absorbing structure 3, the number of energy-absorbing structures 3 is four.
[0150] This configuration allows the energy-absorbing structure 3 to be positioned not only in the intersecting area 23, but also to extend along the first direction X to the entire second wall 222, further improving the impact resistance of the battery management device 600.
[0151] In some embodiments, the energy-absorbing structure 3 further includes a first reinforcing rib 36, which is located inside the energy-absorbing cavity 35. The first reinforcing rib 36 is connected to the peripheral wall 34 and extends along the peripheral wall 34 from the outer wall of the receiving space 21 to the direction away from the outer wall of the receiving space 21.
[0152] In this embodiment, the number of first reinforcing ribs 36 can be one or more. The multiple first reinforcing ribs 36 can be arranged at intervals along the first direction X or at intervals along other directions.
[0153] In this embodiment, the first reinforcing rib 36 extends along the peripheral wall 34 toward the outer wall of the receiving space 21 and toward the outer wall of the receiving space 21 away from the peripheral wall 34. This direction is sufficient to extend from the peripheral wall 34 toward the outer wall of the receiving space 21 to the outer wall of the receiving space 21 away from the outer wall of the receiving space 21, and is not unique.
[0154] The first reinforcing rib 36 is provided to enhance the strength of the energy-absorbing structure 3, reduce deformation during collision, and improve its impact resistance.
[0155] Figure 12 Another structural schematic diagram of the base of the battery management device provided in some embodiments of this application; Figure 13 for Figure 12 Enlarged view at point C.
[0156] Please see Figure 12 and Figure 13 In some embodiments, the first direction X is the height direction, and the bottom end of the energy-absorbing structure 3 protrudes from the first wall 221 located on the bottom side along the first direction X.
[0157] With this configuration, when the first wall 221 located on the bottom side is subjected to a collision, the energy-absorbing structure 3 can share the force, reduce the stress on the first wall 221, and improve the impact resistance of the battery management device 600.
[0158] In some embodiments, the energy-absorbing structure 3 further includes a base plate 37 and a second reinforcing rib 38. The base plate 37 is connected to the peripheral wall 34 and forms an energy-absorbing cavity 35 with the peripheral wall 34. The second reinforcing rib 38 is connected to the base plate 37 and is located on the side of the base plate 37 away from the energy-absorbing cavity 35. The second reinforcing rib 38 extends along the peripheral wall 34 from the outer wall of the receiving space 21 to the direction away from the outer wall of the receiving space 21, and protrudes from the first wall body 221 located on the bottom side along the first direction X. One end of the second reinforcing rib 38 away from the receiving space 21 is connected to the outer wall of the peripheral wall 34 away from the receiving space 21.
[0159] In this embodiment, the second reinforcing rib 38 extends along the peripheral wall 34 close to the outer wall of the receiving space 21 and toward the peripheral wall 34 away from the outer wall of the receiving space 21. Its direction is sufficient to extend along the peripheral wall 34 close to the outer wall of the receiving space 21 and toward the peripheral wall 34 away from the outer wall of the receiving space 21, and is not unique.
[0160] Optionally, the number of second reinforcing ribs 38 may be multiple.
[0161] In this embodiment, the second reinforcing rib 38 is connected to the bottom plate 37 and the outer wall of the peripheral wall 34 away from the accommodating space 21, which can be connected by welding or integral molding.
[0162] The end of the second reinforcing rib 38 away from the receiving space 21 is connected to the outer wall of the peripheral wall 34 away from the receiving space 21 and the bottom plate 37. In this way, when the energy-absorbing structure 3 is hit from the side or the bottom, the second reinforcing rib 38 can share the force, thereby improving the impact resistance of the energy-absorbing structure 3.
[0163] Figure 14 Another structural schematic diagram of the base of the battery management device provided in some embodiments of this application; Figure 15 for Figure 14 Enlarged view at point D.
[0164] Please see Figure 14 and Figure 15 In some embodiments, at least three of the plurality of walls 22 are connected in pairs to form an intersecting region 23, and the energy-absorbing structure 3 includes a groove 39, which is formed by the recess of at least one wall 22 where the intersecting region 23 is located into the receiving space 21.
[0165] In this embodiment, the groove 39 is provided in the intersecting area 23, which is the corner area formed by the direct intersection of the three walls 22. The groove 39 can be provided in one, two, or all three of the three walls 22 that form the intersecting area 23.
[0166] When the intersecting area 23 of the battery management device 600 is impacted, the groove 39 can act as a buffer to reduce the damage to the outer casing 2.
[0167] In some embodiments, the outer casing 2 includes two first walls 221 disposed opposite to each other along a first direction X, two second walls 222 disposed opposite to each other along a second direction Y, and two third walls 223 disposed opposite to each other along a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect each other. The area of the first wall 221 is greater than the area of the second wall 222, and the area of the second wall 222 is greater than or equal to the area of the third wall 223. The first wall 221, the second wall 222, and the third wall 223 forming an intersecting region 23 are all recessed into the receiving space 21 to form a continuous groove 39.
[0168] In this embodiment, the number of consecutive grooves 39 can be one or more.
[0169] Making the groove 39 continuous can further improve the buffering effect and reduce the damage to the outer shell 2 during a collision.
[0170] In some embodiments, the housing 2 includes a cover 24 and a seat 25. The seat 25 has an opening, and the cover 24 closes to the opening. The cover 24 and the seat 25 surround to form an accommodating space. The seat 25 includes two second walls 222, two third walls 223, and a first wall 221. A peripheral wall 34 is disposed on the seat 25. The peripheral wall 34, the second walls 222, and the third walls 223 are integrally formed.
[0171] In this embodiment, the integral molding of the peripheral wall 34, the second wall 222, and the third wall 223 means that the second wall 222 and the third wall 223 connected to the peripheral wall 34 are integrally molded with the peripheral wall 34, while the other second wall 222 and the third wall 223 may be integrally molded with the peripheral wall 34 or may not be integrally molded.
[0172] In the above scenario, the peripheral wall 34, the second wall 222, and the third wall 223 are integrally formed, which facilitates manufacturing and improves the energy absorption effect.
[0173] Optionally, the peripheral wall 34, the two second walls 222 and the two third walls 223 are all integrally formed.
[0174] Optionally, the peripheral wall 34 and the first reinforcing rib 36 therein are integrally formed.
[0175] Optionally, the peripheral wall 34, the first wall 221, the second wall 222 and the third wall 223 are integrally formed.
[0176] Optionally, the peripheral wall 34, the first reinforcing rib 36, the base plate 37, and the second reinforcing rib 38 are integrally formed.
[0177] This application embodiment also provides an electrical device, including the battery device 200 described above, which is used to provide electrical energy.
[0178] Please see Figures 3-5This application provides a battery device 200, including a battery cell assembly 500 and a battery management device 600. The battery management device 600 includes a battery management component 1, a housing 2, and an energy-absorbing structure 3. The battery management component 1 is used to manage and monitor the battery cell assembly 500. The housing 2 includes a plurality of walls 22, which form a receiving space 21 for accommodating the battery management component 1. At least three of the walls 22 are connected in pairs to form an intersecting region 23. The energy-absorbing structure 3 encloses the three walls 22 of the intersecting region 23. The outer casing 2 has at least eight intersecting regions 23. The outer casing 2 includes two first walls 221, two second walls 222, and two third walls 223. The two first walls 221 are arranged opposite each other along a first direction X, the two second walls 222 are arranged opposite each other along a second direction Y, and the two third walls 223 are arranged opposite each other along a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect each other. The area of the first wall 221 is larger than the area of the second wall 222, and the area of the second wall 222 is greater than or equal to the area of the third wall 223. The area of body 223; a first wall 221, a second wall 222 and a third wall 223 are arranged to form a first intersecting region 231, a second intersecting region 232 are formed by a first wall 221, a third wall 223 and another second wall 222, and the energy-absorbing structure 3 is wrapped around the first intersecting region 231 and the second intersecting region 232, and covers the first wall 221 and the third wall 223 located between the first intersecting region 231 and the second intersecting region 232.
[0179] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.
[0180] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A battery device, characterized in that, include: A battery cell assembly, comprising multiple battery cells; A battery management device includes a battery management component, a housing, and an energy-absorbing structure. The battery management component is used to manage and monitor the battery cell assembly. The housing includes a plurality of walls that form a receiving space for accommodating the battery management component. At least three of the walls intersect each other in their extending directions to form an intersecting region. At least a portion of the energy-absorbing structure is disposed in the intersecting region and connected to the housing.
2. The battery device according to claim 1, characterized in that, At least three of the multiple walls are connected in pairs to form the intersecting region, and at least a portion of the energy-absorbing structure is disposed on the side of at least one of the walls where the intersecting region is located, away from the receiving space.
3. The battery device according to claim 2, characterized in that, The energy-absorbing structure encloses the three walls where the intersecting area is located.
4. The battery device according to claim 3, characterized in that, The outer shell has at least eight intersecting regions, the energy-absorbing structure encloses two adjacent intersecting regions, and covers at least one of the two walls located between the two intersecting regions.
5. The battery device according to claim 4, characterized in that, The outer shell includes two first walls, two second walls, and two third walls. The two first walls are arranged opposite each other along a first direction, the two second walls are arranged opposite each other along a second direction, and the two third walls are arranged opposite each other along a third direction. The first direction, the second direction, and the third direction intersect each other. The area of the first wall is greater than the area of the second wall, and the area of the second wall is greater than or equal to the area of the third wall. One of the first wall bodies, one of the second wall bodies, and one of the third wall bodies form a first intersecting region, and one of the first wall bodies, one of the third wall bodies, and another of the second wall bodies form a second intersecting region. The energy-absorbing structure encloses the first intersecting region and the second intersecting region, and covers the first wall body and the third wall body located between the first intersecting region and the second intersecting region.
6. The battery device according to claim 3, characterized in that, The housing includes a base and a cover. The base has an opening, and the cover closes to the opening. The cover and the base enclose the receiving space. The base has multiple intersecting areas, and a single energy-absorbing structure encloses all of the intersecting areas of the base.
7. The battery device according to claim 6, characterized in that, The energy-absorbing structure encloses each surface of the seat that is away from the receiving space.
8. The battery device according to claim 2, characterized in that, The outer shell includes two first walls, two second walls, and two third walls. The two first walls are arranged opposite each other along a first direction, the two second walls are arranged opposite each other along a second direction, and the two third walls are arranged opposite each other along a third direction. The first direction, the second direction, and the third direction intersect each other. The area of the first wall is greater than the area of the second wall, and the area of the second wall is greater than or equal to the area of the third wall. The energy-absorbing structure includes a first energy-absorbing wall, a second energy-absorbing wall, and a third energy-absorbing wall that intersect in pairs. The second energy-absorbing wall is attached to the second wall body, and the third energy-absorbing wall is attached to the third wall body. The first wall body is provided with a void, and the first energy-absorbing wall fills the entire void.
9. The battery device according to claim 2, characterized in that, One of the energy-absorbing structure and the outer shell has a protrusion and the other has a recess, and the protrusion and the recess are in a convex-concave fit.
10. The battery device according to any one of claims 2-9, characterized in that, The energy-absorbing structure is a buffer pad.
11. The battery device according to claim 1, characterized in that, The outer shell includes two first walls arranged opposite each other along a first direction, two second walls arranged opposite each other along a second direction, and two third walls arranged opposite each other along a third direction. The first direction, the second direction, and the third direction intersect each other. The area of the first wall is greater than the area of the second wall, and the area of the second wall is greater than or equal to the area of the third wall. The energy-absorbing structure includes a peripheral wall that surrounds the outer shell, the surrounding direction of which intersects with the first direction. A portion of the outer wall of the peripheral wall is connected to the outer shell and encloses the receiving space, while another portion of the outer wall of the peripheral wall is away from the outer shell. The peripheral wall encloses and forms an energy-absorbing cavity.
12. The battery device according to claim 11, characterized in that, The energy-absorbing structure extends from one end of the second wall to the other end of the second wall along the first direction, and at least one second wall and at least one third wall are connected by the energy-absorbing structure.
13. The battery device according to claim 12, characterized in that, The energy-absorbing structure further includes a first reinforcing rib, which is located inside the energy-absorbing cavity. The first reinforcing rib is connected to the peripheral wall and extends along the peripheral wall from the outer wall of the receiving space to the direction away from the outer wall of the receiving space.
14. The battery device according to claim 11, characterized in that, The first direction is the height direction, and the bottom end of the energy-absorbing structure protrudes from the first wall located on the bottom side along the first direction.
15. The battery device according to claim 14, characterized in that, The energy-absorbing structure further includes a base plate and a second reinforcing rib. The base plate is connected to the peripheral wall and forms the energy-absorbing cavity with the peripheral wall. The second reinforcing rib is connected to the base plate and located on the side of the base plate opposite to the energy-absorbing cavity. The second reinforcing rib extends along the peripheral wall from the outer wall of the receiving space to the direction away from the outer wall of the receiving space, and protrudes from the first wall located on the bottom side along the first direction. The end of the second reinforcing rib away from the receiving space is connected to the outer wall of the peripheral wall away from the receiving space.
16. The battery device according to claim 1, characterized in that, At least three of the plurality of walls are connected in pairs to form the intersecting region, and the energy-absorbing structure includes a groove formed by the recess of at least one of the walls where the intersecting region is located into the receiving space.
17. The battery device according to claim 16, characterized in that, The outer shell includes two first walls arranged opposite each other along a first direction, two second walls arranged opposite each other along a second direction, and two third walls arranged opposite each other along a third direction. The first direction, the second direction, and the third direction intersect each other. The area of the first wall is greater than the area of the second wall, and the area of the second wall is greater than or equal to the area of the third wall. The first wall, the second wall, and the third wall, which form an intersecting area, are all recessed into the receiving space to form a continuous groove.
18. The battery device according to any one of claims 11-15, characterized in that, The outer shell includes a cover and a base. The base has an opening, and the cover closes to the opening. The cover and the base enclose the receiving space. The base includes two second walls, two third walls, and one first wall. A peripheral wall is disposed on the base. The peripheral wall, the second walls, and the third walls are integrally formed.
19. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-18, the battery device being used to provide electrical energy.