Battery device and electric device

Abstract

The application relates to the battery technical field and discloses a battery device and a power utilization device, wherein the battery device comprises a box assembly and a plurality of battery monomers; the box assembly comprises two side plates and two end plates; the two side plates are oppositely arranged in a first direction and each side plate extends along a second direction; the two end plates are oppositely arranged in the second direction and each end plate extends along the first direction; the second direction is perpendicular to the first direction; the end plates are sheet metal parts; and the two ends of the end plates are connected with the two side plates through first fasteners. By arranging the end plates as sheet metal parts and connecting the two ends of the end plates with the two side plates through the first fasteners, on one hand, the thickness of the end plates can be reduced, the occupied space of the end plates is reduced, and thus the occupied space of the battery device is reduced; on the other hand, the particulate matters generated when the end plates and the side plates are connected can be effectively reduced, and the problem that the battery device is disabled due to the particulate matters falling into the gap between the side plates and the side surfaces of the battery monomers can be solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] The end plate of the battery device in the related technology is a die-cast structure, which is not only thick but also occupies a lot of space. When the end plate and side plate are connected, particulate matter is easily generated. If the particulate matter falls into the gap between the side plate and the side of the battery cell, it can easily cause the battery device to fail. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can reduce the space occupied and reduce battery device failure problems.

[0005] In a first aspect, this application provides a battery device, which includes an assembly and a plurality of battery cells. The housing assembly defines a receiving cavity, in which the plurality of battery cells are disposed. The housing assembly includes two side plates and two end plates. The two side plates are disposed opposite each other in a first direction, and each side plate extends along a second direction. The two end plates are disposed opposite each other in the second direction, and each end plate extends along the first direction. The second direction is perpendicular to the first direction. The end plates are sheet metal parts, and both ends of each end plate are connected to the two side plates via first fasteners.

[0006] In the technical solution of this application embodiment, by setting the end plate as a sheet metal part and connecting both ends of the end plate to the two side plates respectively through the first fastener, the thickness of the end plate can be reduced, thus reducing the space occupied by the end plate and consequently reducing the space occupied by the battery device. Furthermore, it can effectively reduce particulate matter generated during the connection of the end plate and the side plates, reducing battery device failure caused by particulate matter falling into the gap between the side plates and the sides of the battery cells.

[0007] In some embodiments, the side plate has a first connecting hole, the end plate has a second connecting hole, the first fastener is a riveting member, and the riveting member includes a riveting body, the riveting body includes a first connecting head, a connecting post and a second connecting head, the connecting post passes through the first connecting hole and the second connecting hole, the first connecting head is connected to one end of the connecting post and stops on the side of the side plate away from the end plate, and the second connecting head is connected to the other end of the connecting post and stops on the side of the end plate away from the side plate.

[0008] In the above technical solution, by setting the riveting body to include a first connector, a connecting post and a second connector, the first connector can be used to stop the side plate away from the end plate, and the second connector can be used to stop the side plate away from the side plate, so that the end plate and the side plate are tightly connected by the riveting parts.

[0009] In some specific embodiments, the riveting body has a channel in the middle, and the riveting component further includes a lock cylinder, which passes through the channel and is interference-fitted with the riveting body. One end of the lock cylinder has a lock head, the radial dimension of which is larger than the radial dimension of the channel, and the lock head stops on the side of the first connector away from the side plate, or the lock head stops on the side of the second connector away from the end plate.

[0010] In the above technical solution, by setting the riveting component to include a riveting body and a lock core, on the one hand, the expansion part formed after riveting has sufficient strength to clamp the end plate and the side plate together with the first connector, and tightly connect the end plate and the side plate. On the other hand, such a riveting component will reduce the generation of particles during the riveting process, and will allow fewer particles to fall into the gap between the side plate and the side of the battery cell. This greatly reduces the problem of short circuit between the battery cell and the side plate caused by particles tearing the blue film of the battery cell and the insulation layer of the side plate, thereby causing insulation failure of the battery cell.

[0011] In some embodiments, the end plate has connecting flanges at both ends in the first direction that extend away from the battery cell, and the connecting flanges are connected to the side plate by the riveting.

[0012] In the above technical solution, by setting connecting flanges at both ends of the end plate in the first direction, on the one hand, a positioning basis is provided for the connection between the end plate and the side plate. When the end plate and the side plate are connected, the connecting flanges can stop the side plate, thereby completing the positioning of the end plate and the side plate. On the other hand, a setting position is provided for the second connecting hole. The second connecting hole can be set on the connecting flange to facilitate the connection of the side plate and the end plate by riveting.

[0013] In some specific embodiments, the connecting flange is connected to the side plate by a plurality of rivets, which are arranged along the length of the connecting flange, and the length of the connecting flange, the first direction, and the second direction are arranged perpendicularly to each other.

[0014] In the above technical solution, by setting multiple rivets along the length of the connecting flange, the connection between the side plate and the connecting flange can be made tighter, thereby improving the connection strength between the connecting flange and the side plate.

[0015] In some examples, the housing assembly also includes a spacer for sealing the gap between the battery cell and the side panel.

[0016] In the above technical solution, by setting up an isolation component, the gap between the battery cell and the side plate can be sealed, forming a physical barrier. This can prevent particulate matter from falling into the gap between the battery cell and the side plate, effectively reducing the problem of battery cell insulation failure caused by particulate matter tearing the blue film of the battery cell and the insulation layer of the side plate.

[0017] In some specific examples, the isolation element is located on the upper part of the side panel.

[0018] In the above technical solution, by placing the separator on the upper part of the side plate, not only can the gap between the battery cell and the side plate be sealed, but the heat dissipation effect of the separator on the battery cell can also be reduced, reducing the heat accumulated by the battery cell during operation, which can reduce the problem of shortened service life of the battery device due to high temperature to a certain extent.

[0019] In some embodiments, the separator is foam. Using foam as the separator allows it to seal the gap between the battery cell and the side plate, and also forms a buffer layer between them. When the battery device is subjected to external pressure or impact, the foam can absorb some energy, reducing the impact force on the battery cell, which improves the safety of the battery device to some extent.

[0020] In some embodiments, the end plate has a first reinforcing portion and a second reinforcing portion in the middle, the first reinforcing portion being a first reinforcing protrusion or a first reinforcing recess, and the second reinforcing portion being a second reinforcing protrusion or a second reinforcing recess, the first reinforcing portion and the second reinforcing portion being arranged intersectingly.

[0021] In the above technical solution, by setting the first and second reinforcing parts at intersection in the middle of the end plate, the structural strength of the end plate can be enhanced, the deformation resistance of the end plate can be improved, and the force on the end plate can be dispersed when the battery device is subjected to external pressure or impact, so that the end plate is not easy to deform.

[0022] According to any of the above embodiments, the battery cell has a terminal at one end in a third direction, and the third direction, the first direction, and the second direction are arranged perpendicularly to each other. The battery device further includes a circuit board, a busbar, and an electrical connector. The circuit board is disposed at the end of the plurality of battery cells in the third direction, the busbar is electrically connected to the terminal of the battery cell, and the electrical connector connects the busbar and the circuit board.

[0023] In the above technical solution, the battery device is configured to include a circuit board, a busbar, and an electrical connector. The busbar can be connected to the terminal of the battery cell, and the busbar can be connected to the circuit board using the electrical connector, thereby transmitting the current of multiple battery cells to the circuit board through the busbar.

[0024] In some embodiments, the battery device further includes an output stage mounting base, which is fixed to one end of the end plate in the third direction by a fastener to limit the displacement of the output stage mounting base in the third direction, and one of the busbars near the end plate is connected to the output stage mounting base.

[0025] In the above technical solution, the output stage mounting base is fixed to one end of the end plate in the third direction by a fastener, which can limit the position of the output stage mounting base in the third direction. When the battery device vibrates, since the output stage mounting base is fixed in the third direction, the possibility of cracking of the weld between the busbar and the battery cell terminal near the end plate or breakage of the busbar near the end plate can be reduced, so that the busbar can work normally.

[0026] In some specific embodiments, the end plate has a mounting flange at one end in the third direction, and the mounting flange has a first mounting hole. The fixing member includes a fixing buckle, which is formed on the side of the output stage mounting base facing the mounting flange and engages with the first mounting hole.

[0027] In the above technical solution, the fixing buckle at the bottom of the output stage mounting base is inserted into the first mounting hole, so that the fixing buckle is engaged with the side wall of the first mounting hole, thereby limiting the output stage mounting base in the third direction, thereby reducing the probability that the output stage mounting base will move in the third direction due to the vibration of the battery device.

[0028] In some examples, the end plate has a mounting flange at the third-party end, and the fastener includes a fixing bracket detachably disposed on the output stage mounting base and connected to the mounting flange.

[0029] In the above technical solution, by setting the fixed bracket to be detachable from the output stage mounting base, on the one hand, the output stage mounting base can be limited in the third direction when the fixed bracket is installed on the output stage mounting base, so that the output stage mounting base will not move in the third direction due to the vibration of the battery device. On the other hand, after the fixed bracket is removed from the output stage mounting base, the output stage mounting base can be removed from the mounting flange, which facilitates the maintenance or replacement of the output stage mounting base.

[0030] In some specific examples, the output stage mounting base has a snap-fit ​​element on its side, and the mounting bracket includes a first snap-fit ​​portion, a second snap-fit ​​portion, and a connecting portion. The first snap-fit ​​portion engages with the snap-fit ​​element, the second snap-fit ​​portion engages with the side of the mounting flange away from the output stage mounting base, and the connecting portion is located on one side of the output stage mounting base and connects the first snap-fit ​​portion and the second snap-fit ​​portion.

[0031] In the above technical solution, the fixing bracket is configured to include a first snap-fit ​​part, a second snap-fit ​​part, and a connecting part. The first snap-fit ​​part can be used to snap the fixing bracket with the snap-fit ​​part on the side of the output stage mounting base, thereby limiting the output stage mounting base in a third direction. The second snap-fit ​​part can be used to snap the fixing bracket onto the side of the mounting flange away from the output stage mounting base, thereby connecting the fixing bracket with the mounting flange. The connecting part can connect the first snap-fit ​​part and the second snap-fit ​​part, so that the connecting part, the first snap-fit ​​part, and the second snap-fit ​​part form an integral structure.

[0032] In some specific examples, the snap-fit ​​is a resilient snap-fit, the output stage mounting base has an opening, one edge of the opening is connected to one end of the resilient snap-fit, and the remaining edges have a gap with the resilient snap-fit.

[0033] The first snap-fit ​​part includes two snap hooks, which are respectively inserted into the gaps on both sides of the elastic buckle and engage with the elastic buckle.

[0034] In the above technical solution, by setting the snap-fit ​​component as an elastic snap-fit ​​and setting the first snap-fit ​​part as including two hooks, the connection between the output stage mounting base and the fixed bracket can be realized by the snap-fit ​​cooperation between the elastic snap-fit ​​and the two hooks, thereby limiting the output stage mounting base in a third direction. Releasing the snap-fit ​​cooperation between the elastic snap-fit ​​and the two hooks will release the limitation of the first snap-fit ​​part on the output mounting base in a third direction, and the operation process is simple.

[0035] In some embodiments, the circuit board is a flexible circuit board, and the flexible circuit board includes a circuit board body and a flexible connector. One side edge of the circuit board body has a mounting notch, the mounting notch having a first edge and a second edge disposed opposite to each other in a second direction. The flexible connector is located at the mounting notch and includes a connecting piece and a buffer piece, the connecting piece and the buffer piece being arranged in the second direction. A first breakpoint connection is formed between the connecting piece and the first edge, and the buffer piece is connected to the second edge.

[0036] The buffer sheet includes a first buffer portion and a second buffer portion. Both the first buffer portion and the second buffer portion extend along the second direction and are arranged in the first direction. The first buffer portion is located between the second buffer portion and the circuit board body. One end of the first buffer portion is connected to a connecting piece and the other end is connected to the second buffer portion. The connecting piece and the second buffer portion are connected by a second breakpoint connecting portion.

[0037] In the above technical solution, by setting a first break connection part and a second break connection part, the circuit board can break when subjected to tensile force in the second direction, protecting the electrical connectors and thus ensuring normal connection between the circuit board and the busbar; by setting the buffer sheet to include a first buffer part and a second buffer part, and arranging the first buffer part and the second buffer part in the first direction, the extension distance of the first buffer part and the second buffer part in the second direction can be extended, so that the buffer sheet can better absorb the tensile force in the second direction, effectively reducing the problem of battery device function loss caused by the circuit board breaking under tensile force.

[0038] In some specific embodiments, the second buffer portion includes a first extension segment and a second extension segment, both of which extend along the second direction and are arranged in the first direction, with the first extension segment located between the second extension segment and the first buffer portion.

[0039] Wherein, the end of the first extension segment near the connecting piece and the end of the second extension segment near the connecting piece are connected, and the connection position of the two is connected to the connecting piece by a second breakpoint connection part; the end of the second extension segment away from the connecting piece is connected to the second edge; the end of the first extension segment away from the connecting piece and the end of the first buffer part away from the connecting piece are connected, and the connection position of the two is connected to the second edge by a third breakpoint connection part.

[0040] In the above technical solution, by setting the second buffer part to include a first extension section and a second extension section arranged in the first direction, the second buffer part can have a longer extension length when extending in the second direction, which effectively reduces the risk of the circuit board being pulled apart in the second direction and reduces the possibility of the battery device losing its function; by setting a third break point connection part at the end of the first extension section away from the connecting piece and the end of the first buffer part away from the connecting piece, it can break when the tensile force in the second direction exceeds the absorption capacity of the buffer piece, reducing the effect of the tensile force on the connecting piece, so that the circuit board and the busbar can be connected normally.

[0041] In some embodiments, the housing assembly further includes a cover plate that covers one end of the plurality of battery cells in the third direction and is connected to the side plate and the end plate; the battery device further includes a separator plate disposed between the plurality of battery cells and the cover plate in the third direction, and the circuit board disposed between the separator plate and the cover plate. The housing assembly further includes a bottom plate that covers the other end of the plurality of battery cells in the third direction and is connected to the side plate and the end plate.

[0042] The isolation plate has a limiting post, and the circuit board has a limiting hole. The limiting post and the limiting hole are inserted into each other.

[0043] In the above technical solution, by setting an isolation plate, a mounting carrier can be provided for the circuit board, making it easy to fix the circuit board on the isolation plate. This allows the circuit board and the isolation plate to be supplied as a whole, which can effectively reduce production costs. By setting a limiting post on the isolation plate and a limiting hole on the circuit board, the circuit board can be fixed after the limiting post and the limiting hole are inserted and matched. This greatly reduces the loosening of the circuit board during the use of the battery device and improves the reliability of the connection between the circuit board and the electrical connector, and between the circuit board and the connector.

[0044] In some embodiments, the battery device further includes a connector, which is fixed to one end of the end plate in the third direction by a second fastener, and the circuit board is connected to the connector at one end in the second direction.

[0045] The circuit board is a flexible circuit board, and the end of the circuit board near the connector has an arched portion.

[0046] In the above technical solution, by setting an arched part at one end of the circuit board near the connector, the tensile force along the second direction on the circuit board can be absorbed. Under the action of the tensile force, the arched height of the arched part gradually decreases, thereby protecting the circuit board and reducing the possibility of the circuit board breaking under the action of the tensile force.

[0047] In some specific embodiments, the end plate has a mounting flange at one end in the third direction, and the mounting flange is provided with a second mounting hole. In the second direction, the size of the second mounting hole is larger than the size of the second fastener.

[0048] This design reduces the possibility of the connector detaching from the circuit board and lowers the maximum arch height of the arch, eliminating the need for a high arch height to absorb tension and thus reducing the impact of the arch height on other structures of the battery device.

[0049] In some examples, the second fastener is an injection-molded riveted part.

[0050] In the above technical solution, by setting the second fastener as an injection-molded riveting part and setting a riveting part on the riveting part, the injection-molded riveting part can be engaged with the hole wall of the second mounting hole through multiple protrusions on the riveting part, so that the injection-molded riveting part is not easy to loosen when the battery device vibrates or moves in the second mounting hole, thereby reducing the risk of the injection-molded riveting part falling off.

[0051] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments.

[0052] According to the embodiments of the present invention, by setting the power device to include the battery device in the above embodiments, the power device can be used normally and has good reliability.

[0053] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0054] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 The electrical device provided in some embodiments of this application is a structural schematic diagram of a vehicle; Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application; Figure 3 This is a partial structural schematic diagram of a battery device according to some embodiments of this application; Figure 4 for Figure 3 Exploded view of the battery device in the diagram; Figure 5 This is a schematic diagram of the structure of a battery device according to some embodiments of this application, where the first fastener is a riveted member; Figure 6 for Figure 5 The enlarged view of part A shown; Figure 7 for Figure 5 The sectional view of the riveted components after riveting is shown. Figure 8 yes Figure 4 An enlarged view of section B is shown below; Figure 9This is a schematic diagram of the structure of the output stage mounting base of a battery device according to some embodiments of this application; Figure 10 for Figure 9 Side view of the output stage mounting bracket; Figure 11 This is a schematic diagram of the structure of the end plate and output stage mounting base of the battery device according to some embodiments of this application; Figure 12 This is a schematic diagram of the structure of the mounting bracket and output stage mount according to some embodiments of this application; Figure 13 This is a schematic diagram of the mounting flange of the fixed bracket and output stage mounting base snapped onto the end plate according to some embodiments of this application; Figure 14 for Figure 1 A partial structural diagram of the battery device is shown. Figure 15 for Figure 14 Enlarged view of section C in the image; Figure 16 for Figure 14 Top view of the structure; Figure 17 for Figure 16 The enlarged view of part D shown; Figure 18 for Figure 11 Top view of the end plate in the middle; Figure 19 for Figure 18 Enlarged view of part E in the image; Figure 20 This is a schematic diagram of the structure of a second fastener for a battery device according to some embodiments of this application.

[0055] The reference numerals in the detailed embodiments are as follows: Battery device 100; Box assembly 10; Receiving cavity 10a; Side plate 11; First connecting hole 11a; End plate 12; second connecting hole 12a; first reinforcing part 12b; second reinforcing part 12c; connecting flange 121; mounting flange 122; first mounting hole 122a; second mounting hole 122b; First fastener 13; Rivet 131; Rivet body 1311; Channel 1311a; First connector 13111; Connecting post 13112; Second connector 13113; Lock cylinder 1312; Threaded part 1312a; Lock head 13121; Expansion part 132; 14. Isolation component; 15. Cover plate; 16. Base plate; 20 battery cells; Circuit board 30; limiting hole 30a; arched part 30b; Circuit board body 31; mounting notch 31a; first edge 31a1; second edge 31a2; Flexible connector 32; connecting piece 321; buffer piece 322; first buffer section 3221; second buffer section 3222; first extension section 32221; second extension section 32222; First breakpoint connection part 33; Second breakpoint connection part 34; Third breakpoint connection part 35; Busbar 40; Electrical connector 50; Output stage mounting bracket 60; opening 60a; threaded hole 60b; locking bolt 60c; snap-fit ​​connector 61; 70; 71; 72; First locking part 721; hook 7211; second locking part 722; connecting part 723; Isolation plate 80; Limiting post 81; Connector 90; Second fastener 91; Rivet part 911; Locking protrusion 9111; Electrical device 1000; controller 1000a; motor 1000b. Detailed Implementation

[0056] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0058] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0059] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0061] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0062] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0063] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0064] Currently, judging from market trends, the application of power battery devices is becoming increasingly widespread. Power battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace, among other fields. With the continuous expansion of the application areas of power battery devices, the market demand is also constantly increasing.

[0065] The end plate of the battery device in the related technology is a die-cast structure, which is not only thick but also occupies a lot of space. When the end plate and side plate are connected, particulate matter is easily generated. If the particulate matter falls into the gap between the side plate and the side of the battery cell, it can easily cause the battery device to fail.

[0066] Therefore, this application sets the end plate as a sheet metal part, that is, uses a sheet metal end plate, and uses a first fastener to connect the sheet metal end plate to the side plate. This not only reduces the thickness of the end plate and the space occupied by the end plate, but also reduces the particulate matter generated when the end plate and the side plate are connected, and reduces the problem of battery device failure caused by particulate matter falling into the gap between the side plate and the side of the battery cell.

[0067] The battery device disclosed in this application can be used as a power source for electrical devices or as an energy storage element in various energy storage systems. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0068] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0069] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle, and the battery device 100 can 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. The vehicle may also include a controller 1000a and a motor 1000b. The controller 1000a is used to control the battery device 100 to supply power to the motor 1000b, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0070] 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.

[0071] Please refer to Figure 2 , Figure 2This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing assembly 10 and a battery cell 20. The housing assembly 10 defines a receiving cavity 10a, in which the battery cell 20 is received.

[0072] On the one hand, the housing assembly 10 can provide an installation carrier for multiple battery cells 20, allowing multiple battery cells 20 to be installed together and connected to supply power to the electrical device 1000. On the other hand, when the battery device 100 is subjected to external impact, the housing assembly 10 will preferentially bear the impact, buffering at least part of the impact energy, thereby reducing the impact on the battery cells 20 and improving the safety of the battery device 100.

[0073] In the battery device 100, there can be multiple battery cells 20. These multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 20 is housed in the receiving cavity 10a. Of course, the battery device 100 can also be in the form of multiple battery cells 20 first connected in series, in parallel, or in a mixed manner to form a battery device 100 module, and then multiple battery device 100 modules are connected in series, in parallel, or in a mixed manner to form a whole assembly, which is housed in the receiving cavity 10a.

[0074] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0075] A battery cell 20 refers to the smallest unit that makes up the battery device 100. A battery cell 20 includes a cover, a housing, electrode assemblies, and other functional components.

[0076] A casing cover is a component that closes onto the opening of the casing to isolate the internal environment of the battery cell 20 from the external environment. The shape of the casing cover can be adapted to the shape of the casing to fit the casing. Optionally, the casing cover can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the casing cover is not easily deformed under pressure and impact, giving the battery cell 20 higher structural strength and improved reliability. Functional components such as electrode terminals can be provided on the casing cover. The electrode terminals can be used to electrically connect to electrode assemblies for outputting or inputting electrical energy into the battery cell 20. In some embodiments, the casing cover can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The casing cover can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating component can also be provided on the inner side of the casing cover. The insulating component can be used to isolate the electrical connection components inside the casing from the casing cover to reduce the risk of short circuits. For example, the insulating element can be made of plastic, rubber, etc.

[0077] The housing is a component used to cooperate with the cover to form the internal environment of the battery cell 20. This internal environment can accommodate electrode components, electrolyte, and other components. The housing and cover can be independent components, with an opening on the housing. The cover closes the opening to form the internal environment of the battery cell 20. Alternatively, the cover and housing can be integrated. Specifically, the cover and housing can form a common connection surface before other components are inserted into the housing. When the interior of the housing needs to be encapsulated, the cover closes the housing. The housing can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing can be determined according to the specific shape and size of the electrode components. The housing can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on these materials.

[0078] The electrode assembly is the component in the battery cell 20 where the electrochemical reaction occurs. The casing may contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0079] Please refer to Figure 2 and further refer to Figure 3and Figure 4 , Figure 3 This is a partial structural schematic diagram of a battery device 100 according to some embodiments of this application; Figure 4 for Figure 3 An exploded view of the structure of the battery device 100. The housing assembly 10 includes two side plates 11 and two end plates 12. The two side plates 11 are arranged opposite each other in a first direction, and each side plate 11 extends along a second direction. The two end plates 12 are arranged opposite each other in a second direction, and each end plate 12 extends along the first direction. The second direction is perpendicular to the first direction.

[0080] "First direction" is Figure 3 and Figure 4 The X direction in the text refers to the width direction of the housing assembly 10, and the "second direction" refers to... Figure 3 and Figure 4 The Y direction is the length direction of the housing assembly 10. The two side plates 11 and the two end plates 12 can form multiple side walls of the housing assembly 10.

[0081] Among them, end plate 12 is a sheet metal part. Here, "sheet metal" is a processing technology for thin metal sheets, and structural parts processed by sheet metal technology are sheet metal parts.

[0082] Both ends of the end plate 12 are connected to the two side plates 11 by the first fastener 13. Specifically, one end plate 12 is connected to one end of the two side plates 11 in the second direction by the first fastener 13 at both ends in the first direction, and the other end plate 12 is connected to the other end of the two side plates 11 in the second direction by the first fastener 13 at both ends in the first direction.

[0083] In the technical solution of this application embodiment, by setting the end plate 12 as a sheet metal part and connecting the two ends of the end plate 12 to the two side plates 11 respectively through the first fastener 13, the thickness of the end plate 12 can be reduced, the space occupied by the end plate 12 can be reduced, thereby reducing the space occupied by the battery device 100. On the other hand, it can effectively reduce the particulate matter generated when the end plate 12 and the side plates 11 are connected, and reduce the battery device 100 failure problem caused by particulate matter falling into the gap between the side plate 11 and the side of the battery cell 20.

[0084] Reference Figure 4 and further refer to Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of the first fastener 13 of the battery device 100 according to some embodiments of this application, which is a riveting member 131; Figure 6 for Figure 5The enlarged view of part A is shown. In some embodiments, the side plate 11 has a first connecting hole 11a, the end plate 12 has a second connecting hole 12a, and the first fastener 13 is a riveting member 131.

[0085] Specifically, the riveting component 131 includes a riveting body 1311, which includes a first connector 13111, a connecting post 131112, and a second connector 13113. The connecting post 131112 passes through the first connecting hole 11a and the second connecting hole 12a. The first connector 13111 is connected to one end of the connecting post 131112 and stops on the side of the side plate 11 away from the end plate 12. The second connector 13113 is connected to the other end of the connecting post 131112 and stops on the side of the end plate 12 away from the side plate 11.

[0086] In the above technical solution, by setting the riveting body 1311 to include a first connector 13111, a connecting post 131112, and a second connector 13113, the first connector 13111 can stop the side plate 11 away from the end plate 12, and the second connector 13113 can stop the side plate 12 away from the side plate 11, so that the end plate 12 and the side plate 11 are tightly connected by the riveting member 131.

[0087] For example, the first fastener 13 can also be a bolt or other component with a fastening function.

[0088] Reference Figure 5 and Figure 6 and further refer to Figure 7 , Figure 7 for Figure 5 The diagram shows a cross-sectional view of the riveting component 131 after riveting. In some specific embodiments, the riveting body 1311 has a channel 1311a in the middle, and the riveting component 131 also includes a lock cylinder 1312, which passes through the channel 1311a and is interference-fitted with the riveting body 1311.

[0089] One end of the lock cylinder 1312 has a lock head 13121. The radial dimension of the lock head 13121 is larger than the radial dimension of the channel 1311a. The lock head 13121 stops on the side of the first connector 13111 away from the side plate 11, or the lock head 13121 stops on the side of the second connector 13113 away from the end plate 12.

[0090] The following is a specific example of the locking head 13121 stopping on the side of the second connector 13113 away from the end plate 12. Before the riveting operation, the second connector 13113 of the riveting body 1311 does not deform. At this time, the radial dimension of the second connector 13113 is smaller than the radial dimensions of the first connecting hole 11a and the second connecting hole 12a. Therefore, the second connector 13113 can pass through the first connecting hole 11a and the second connecting hole 12a. After the riveting operation, the second connector 13113 of the riveting body 1311 deforms. At this time, the radial dimension of the second connector 13113 is larger than the radial dimensions of the first connecting hole 11a and the second connecting hole 12a, thereby tightly connecting the end plate 12 and the side plate 11.

[0091] Specifically, the other end of the lock cylinder 1312 is provided with a threaded portion 1312a, which can engage with the jaws on the rivet gun. Before riveting, the second connector 13113 of the riveting body 1311 can be passed through the first connecting hole 11a and the second connecting hole 12a, so that the first connector 13111 stops on the side of the side plate 11 away from the end plate 12. Then, the jaws of the rivet gun engage with the threads on the lock cylinder 1312, and the lock cylinder 1312 is pulled in a direction away from the first connector 13111, so that the lock head 13121 moves along the channel 1311a under the drive of the lock cylinder 1312.

[0092] Since the radial dimension of the lock head 13121 is larger than the radial dimension of the channel 1311a, as the lock head 13121 moves along the channel 1311a under the drive of the lock cylinder 1312, the lock head 13121 will squeeze the second connector 13113, causing the second connector 13113 to deform and eventually form an expansion part 132. The expansion part 132 stops on the side of the end plate 12 away from the side plate 11, thereby tightly connecting the end plate 12 and the side plate 11. The middle part of the lock cylinder 1312 can break and be pulled out by the rivet gun.

[0093] In the above technical solution, by setting the riveting component 131 to include a riveting body 1311 and a lock core 1312, on the one hand, the expansion part 132 formed after riveting the riveting component 131 has sufficient strength to clamp the end plate 12 and the side plate 11 together with the first connector 13111, and tightly connect the end plate 12 and the side plate 11. On the other hand, such a riveting component 131 will reduce the generation of particles during the riveting process, and can make fewer particles fall into the gap between the side plate 11 and the side of the battery cell 20, which greatly reduces the problem of short circuit between the battery cell 20 and the side plate 11 caused by particles tearing the blue film of the battery cell 20 and the insulation layer of the side plate 11, thereby causing the insulation failure of the battery cell 20.

[0094] Reference Figure 3 and Figure 4In some embodiments, both ends of the end plate 12 in the first direction have connecting flanges 121 extending in a direction away from the battery cell 20, and the connecting flanges 121 are connected to the side plate 11 by riveting members 131. That is, the extending direction of the connecting flanges 121 is consistent with the extending direction of the side plate 11.

[0095] In the above technical solution, by providing connecting flanges 121 at both ends of the end plate 12 in the first direction, on the one hand, it provides a positioning basis for the connection between the end plate 12 and the side plate 11. When the end plate 12 and the side plate 11 are connected, the connecting flanges 121 can stop the side plate 11, thereby completing the positioning of the end plate 12 and the side plate 11. On the other hand, it provides a setting position for the second connecting hole 12a. The second connecting hole 12a can be set on the connecting flanges 121 to facilitate the connection of the side plate 11 and the end plate 12 by the riveting member 131.

[0096] In addition, when the battery device 100 expands along the second direction, the connecting flange 121 is less likely to expand and deform, effectively reducing the risk of disconnection between the connecting flange 121 and the side plate 11.

[0097] Refer again Figure 3 and Figure 4 In some specific embodiments, the connecting flange 121 is connected to the side plate 11 by a plurality of rivets 131. The plurality of rivets 131 are arranged in the length direction of the connecting flange 121, and the length direction, the first direction and the second direction of the connecting flange 121 are perpendicular to each other.

[0098] In the above technical solution, by providing multiple rivets 131 along the length of the connecting flange 121, the connection between the side plate 11 and the connecting flange 121 can be made tighter, thereby improving the connection strength between the connecting flange 121 and the side plate 11.

[0099] Reference Figure 4 and further refer to Figure 8 , Figure 8 yes Figure 4 An enlarged view of section B is shown. In some examples, the housing assembly 10 also includes a spacer 14 for sealing the gap between the battery cell 20 and the side panel 11.

[0100] In the above technical solution, by setting the isolation component 14, the gap between the battery cell 20 and the side plate 11 can be sealed, forming a physical barrier, thereby preventing particulate matter from falling into the gap between the battery cell 20 and the side plate 11, effectively reducing the problem of insulation failure of the battery cell 20 caused by particulate matter tearing the blue film of the battery cell 20 and the insulation layer of the side plate 11.

[0101] Please refer to this again. Figure 4 and Figure 8In some specific examples, the spacer 14 is located on the upper part of the side plate 11.

[0102] In the above technical solution, by setting the separator 14 on the upper part of the side plate 11, not only can the gap between the battery cell 20 and the side plate 11 be sealed, but the heat dissipation effect of the separator 14 on the battery cell 20 can also be reduced, reducing the heat accumulated by the battery cell 20 during operation, which can reduce the problem of shortened service life of the battery device 100 due to high temperature to a certain extent.

[0103] Please continue to refer to Figure 4 In some embodiments, the spacer 14 is foam. Using foam as the spacer 14 serves two purposes: firstly, it seals the gap between the battery cell 20 and the side plate 11; secondly, it forms a buffer layer between the battery cell 20 and the side plate 11. When the battery device 100 is subjected to external pressure or impact, the foam can absorb some energy, reducing the impact force on the battery cell 20, which improves the safety of the battery device 100 to a certain extent.

[0104] Reference Figure 4 In some embodiments, the middle portion of the end plate 12 has a first reinforcing portion 12b and a second reinforcing portion 12c. The first reinforcing portion 12b is a first reinforcing protrusion or a first reinforcing recess, and the second reinforcing portion 12c is a second reinforcing protrusion or a second reinforcing recess. The first reinforcing portion 12b and the second reinforcing portion 12c are arranged intersectingly.

[0105] Since the end plate 12 is a sheet metal part and its thickness is relatively thin, if the battery cell 20 expands during the use of the battery device 100, there is a risk that the middle part of the end plate 12 may be deformed or damaged.

[0106] In the above technical solution, by setting the first reinforcing part 12b and the second reinforcing part 12c in the middle of the end plate 12, the structural strength of the end plate 12 can be enhanced and the deformation resistance of the end plate 12 can be improved. When the battery device 100 is subjected to external pressure or impact, the force on the end plate 12 can be dispersed, making the end plate 12 less prone to deformation.

[0107] For example, the first reinforcing portion 12b is a first reinforcing protrusion, and the second reinforcing portion 12c is a second reinforcing protrusion, both protruding in a direction away from the battery cell 20; for example, the first reinforcing portion 12b is a first reinforcing recess, and the second reinforcing portion 12c is a second reinforcing recess, both recessed in a direction towards the battery cell 20; for example, the first reinforcing portion 12b is a first reinforcing protrusion, and the second reinforcing portion 12c is a second reinforcing recess; for example, the first reinforcing portion 12b is a first reinforcing recess, and the second reinforcing portion 12c is a second reinforcing protrusion. This arrangement allows for expansion space to be reserved for the battery cell 20, making it less likely for the battery cell 20 to contact the first reinforcing portion 12b and the second reinforcing portion 12c after expansion.

[0108] Please continue to refer to Figure 3 and Figure 4 According to some embodiments of this application, the battery cell 20 has a terminal post (not shown in the figure) at one end in the third direction, and the third direction, the first direction and the second direction are arranged perpendicularly to each other.

[0109] Among them, "third-party" refers to Figure 3 The Z direction refers to the height direction of the housing assembly 10. Multiple battery cells 20 can be arranged in the first and second directions, with each battery cell 20 extending along the third direction in its height direction, and the terminal post is located at one end of the battery cell 20 in the third direction.

[0110] The battery device 100 also includes a circuit board 30, a busbar 40, and an electrical connector 50. The circuit board 30 is located at one end of the plurality of battery cells 20 in a third direction, the busbar 40 is electrically connected to the terminal of the battery cell 20, and the electrical connector 50 connects the busbar 40 and the circuit board 30.

[0111] For example, there can be multiple busbars 40, and each busbar 40 can be connected to the terminal of one or more battery cells 20.

[0112] In the above technical solution, the battery device 100 is configured to include a circuit board 30, a busbar 40 and an electrical connector 50. The busbar 40 can be connected to the terminal of the battery cell 20, and the busbar 40 can be connected to the circuit board 30 using the electrical connector 50, so that the current of multiple battery cells 20 can be transmitted to the circuit board 30 through the busbar 40.

[0113] Continue to refer to Figure 3 and Figure 4In some embodiments, the battery device 100 further includes an output stage mounting base 60, which is fixed to one end of the end plate 12 in a third direction by a fastener 70 to limit the displacement of the output stage mounting base 60 in the third direction. One of the busbars 40 near the end plate 12 is connected to the output stage mounting base 60.

[0114] One of the busbars 40 near the end plate 12 is welded to the terminal of the battery cell 20 and electrically connected to the terminal. The top of the output stage mounting base 60 has a threaded hole 60b. The busbar 40 is fixed to the top of the output stage mounting base 60 by the engagement of the locking bolt 60c with the threaded hole 60b along one end near the end plate 12.

[0115] In the above technical solution, the output stage mounting base 60 is fixed to one end of the end plate 12 in the third direction by the fastener 70, which can limit the output stage mounting base 60 in the third direction. When the battery device 100 vibrates, since the output stage mounting base 60 is fixed in the third direction, the possibility of cracking of the weld between the busbar 40 and the battery cell 20 pole near the end plate 12 or breakage of the busbar 40 near the end plate 12 can be reduced, so that the busbar 40 can work normally.

[0116] Reference Figure 3 and Figure 4 and further refer to Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of the structure of the output stage mounting base 60 of the battery device 100 according to some embodiments of this application; Figure 10 for Figure 9 The image shows a side view of the output stage mounting base 60. In some examples, the end plate 12 has a mounting flange 122 at one end in the third direction, and the mounting flange 122 has a first mounting hole 122a. The fastener 70 includes a retaining clip 71 formed on the side of the output stage mounting base 60 facing the mounting flange 122 and engaging with the first mounting hole 122a.

[0117] For example, the mounting flange 122 extends in the second direction away from the battery cell 20. The mounting flange 122 is provided with a first mounting hole 122a, which is an elongated hole extending in the first direction. There are two fixing clips 71, and the two fixing clips 71 are arranged in the first direction. Both fixing clips 71 can be engaged with the first mounting hole 122a. Of course, the number of fixing clips 71 can be one or more.

[0118] In the above technical solution, the fixing buckle 71 at the bottom of the output stage mounting base 60 is inserted into the first mounting hole 122a, so that the fixing buckle 71 is engaged with the side wall of the first mounting hole 122a, thereby limiting the output stage mounting base 60 in the third direction, thereby reducing the probability that the output stage mounting base 60 will move in the third direction due to the vibration of the battery device 100.

[0119] Reference Figure 11 , Figure 11 This is a schematic diagram of the structure of the end plate 12 and output stage mounting base 60 of the battery device 100 according to some embodiments of this application. In some examples, the end plate 12 has a mounting flange 122 at one end in the third direction, and the fastener 70 includes a fixing bracket 72, which is detachably disposed on the output stage mounting base 60 and connected to the mounting flange 122.

[0120] In the above technical solution, by setting the fixing bracket 72 to be detachable from the output stage mounting base 60, on the one hand, the fixing bracket 72 can limit the output stage mounting base 60 in the third direction when it is installed, so that the output stage mounting base 60 will not move in the third direction due to the vibration of the battery device 100. On the other hand, after the fixing bracket 72 is removed from the output stage mounting base 60, the output stage mounting base 60 can be removed from the mounting flange 122, which facilitates the maintenance or replacement of the output stage mounting base 60.

[0121] Reference Figure 12 and Figure 13 , Figure 12 This is a schematic diagram of the structure of the mounting bracket 72 and the output stage mounting base 60 according to some embodiments of this application; Figure 13 This is a schematic diagram of the structure of the mounting bracket 72 and the output stage mounting base 60 snapping onto the mounting flange 122 of the end plate 12 according to some embodiments of this application. In some specific examples, the output stage mounting base 60 has a snap-fit ​​member 61 on its side, and the mounting bracket 72 includes a first snap-fit ​​part 721, a second snap-fit ​​part 722, and a connecting part 723, with the connecting part 723 connecting the first snap-fit ​​part 721 and the second snap-fit ​​part 722.

[0122] Specifically, when the output stage mounting base 60 is connected to the mounting flange 122 via the fixed bracket 72, the first snap-fit ​​part 721 snaps into the snap-fit ​​member 61, the second snap-fit ​​part 722 snaps into the side of the mounting flange 122 away from the output stage mounting base 60, and the connecting part 723 is located on one side of the output stage mounting base 60.

[0123] In the above technical solution, by configuring the fixing bracket 72 to include a first snap-fit ​​part 721, a second snap-fit ​​part 722, and a connecting part 723, the first snap-fit ​​part 721 can be used to snap-fit ​​the fixing bracket 72 with the snap-fit ​​member 61 on the side of the output stage mounting base 60, thereby limiting the output stage mounting base 60 in a third direction; the second snap-fit ​​part 722 can be used to snap-fit ​​the fixing bracket 72 onto the side of the mounting flange 122 away from the output stage mounting base 60, thereby connecting the fixing bracket 72 with the mounting flange 122; the connecting part 723 can be used to connect the first snap-fit ​​part 721 and the second snap-fit ​​part 722, thereby forming an integral structure.

[0124] Continue to refer to Figure 12 and Figure 13 In some specific examples, the snap-fit ​​61 is a resilient snap-fit, and the output stage mounting base 60 has an opening 60a, one side edge of which is connected to one end of the resilient snap-fit ​​and the remaining edge is gapped with the resilient snap-fit.

[0125] The first snap-fit ​​part 721 includes two snap hooks 7211, which are respectively inserted into the gaps on both sides of the elastic buckle and engage with the elastic buckle.

[0126] Specifically, when installing the output stage mounting base 60 on the mounting flange 122, the two hooks 7211 of the first snap-fit ​​part 721 can be inserted into the gaps on both sides of the elastic buckle. Then, the first snap-fit ​​part 721 can be moved to the bottom of the elastic buckle so that the two hooks 7211 of the first snap-fit ​​part 721 engage with the elastic buckle respectively. Then, the second snap-fit ​​part 722 can be inserted under the mounting flange 122 along the second direction so that the mounting flange 122 is locked between the output stage mounting base 60 and the second snap-fit ​​part 722.

[0127] When it is necessary to remove the output stage mounting bracket 60, the output stage mounting bracket 60 can be pulled out along the second direction to disengage the second snap-fit ​​part 722 from the mounting flange 122. Then, the elastic buckle can be moved along the second direction away from the battery cell 20. Then, the two hooks 7211 of the first snap-fit ​​part 721 can be moved from bottom to top to disengage the first snap-fit ​​part 721 from the elastic buckle.

[0128] In the above technical solution, by setting the snap-fit ​​61 as an elastic snap-fit ​​and setting the first snap-fit ​​part 721 as including two hooks 7211, the connection between the output stage mounting base 60 and the fixed bracket 72 can be realized by the snap-fit ​​cooperation between the elastic snap-fit ​​and the two hooks 7211. This allows the output stage mounting base 60 to be limited in a third direction. Releasing the snap-fit ​​cooperation between the elastic snap-fit ​​and the two hooks 7211 releases the limitation of the first snap-fit ​​part 721 on the output mounting base in a third direction. The operation process is simple.

[0129] Reference Figure 14 and Figure 15 , Figure 14 for Figure 1 A partial structural schematic diagram of the battery device 100 shown; Figure 15 for Figure 14 Enlarged view of part C in the figure. In some embodiments, the circuit board 30 is a flexible circuit board, and the flexible circuit board includes a circuit board body 31 and a flexible connector 32. The electrical connector 50 connects the busbar 40 and the flexible connector 32.

[0130] Reference Figure 16 and Figure 17 , Figure 16 for Figure 14 Top view of the structure; Figure 17 for Figure 16 The enlarged view of part D is shown. One side edge of the circuit board body 31 has a mounting notch 31a, the mounting notch 31a has a first edge 31a1 and a second edge 31a2, the first edge 31a1 and the second edge 31a2 are arranged opposite to each other in a second direction, and the flexible connector 32 is located at the mounting notch 31a.

[0131] Reference Figure 17 The flexible connector 32 includes a connecting piece 321 and a buffer piece 322. The connecting piece 321 and the buffer piece 322 are arranged in the second direction. The connecting piece 321 is connected to the first edge 31a1 by a first breakpoint connection part 33, and the buffer piece 322 is connected to the second edge 31a2.

[0132] The buffer sheet 322 includes a first buffer portion 3221 and a second buffer portion 3222. Both the first buffer portion 3221 and the second buffer portion 3222 extend along a second direction. The first buffer portion 3221 and the second buffer portion 3222 are arranged in a first direction. In the first direction, the first buffer portion 3221 is located between the second buffer portion 3222 and the circuit board body 31. One end of the first buffer portion 3221 is connected to the connecting piece 321 and the other end is connected to the second buffer portion 3222. The connecting piece 321 and the second buffer portion 3222 are connected by a second breakpoint connecting portion 34.

[0133] When the battery cell 20 expands along the second direction, the circuit board 30 will be subjected to a tensile force along the second direction. When the tensile force on the circuit board 30 is too large, the first break connection 33 and the second break connection 34 will break, reducing the tensile force on the electrical connector 50 and reducing the possibility of deformation or breakage of the electrical connector 50 under the action of tensile force, so that the circuit board 30 and the busbar 40 can be normally connected through the electrical connector 50.

[0134] After the first break point connection 33 and the second break point connection 34 break, the buffer sheet 322 can absorb part of the tensile force. Specifically, the first buffer part 3221 and the second buffer part 3222 both extend along the second direction under the action of tensile force, so that the circuit board 30 has the capacity to absorb the bidirectional tensile force in the second direction, effectively reducing the problem of loss of function of the battery device 100 due to the breakage of the circuit board 30 under the action of tensile force.

[0135] The first buffer portion 3221 and the second buffer portion 3222 are arranged in the first direction, which makes them able to extend a longer length after receiving tension, and can better absorb tension in the second direction.

[0136] In the above technical solution, by setting the first break connection part 33 and the second break connection part 34, the circuit board 30 can break when subjected to tensile force in the second direction, protecting the electrical connector 50, thereby allowing the circuit board 30 to be normally connected to the busbar 40; by setting the buffer plate 322 to include the first buffer part 3221 and the second buffer part 3222, and arranging the first buffer part 3221 and the second buffer part 3222 in the first direction, the extension distance of the first buffer part 3221 and the second buffer part 3222 in the second direction can be extended, so that the buffer plate 322 can better absorb the tensile force in the second direction, effectively reducing the problem of the battery device 100 losing its function due to the circuit board 30 breaking under tensile force.

[0137] Reference Figure 17 In some specific embodiments, the second buffer portion 3222 includes a first extension 32221 and a second extension 32222. Both the first extension 32221 and the second extension 32222 extend along a second direction. The first extension 32221 and the second extension 32222 are arranged in a first direction, and in the first direction, the first extension 32221 is located between the second extension 32222 and the first buffer portion 3221.

[0138] The first extension segment 32221 is connected to the end of the connecting piece 321 and the second extension segment 32222 is connected to the end of the connecting piece 321. The connection position of the two is connected to the connecting piece 321 by a second breakpoint connection part 34. The end of the second extension segment 32222 away from the connecting piece 321 is connected to the second edge 31a2. The end of the first extension segment 32221 away from the connecting piece 321 and the end of the first buffer part 3221 away from the connecting piece 321 are connected. The connection position of the two is connected to the second edge 31a2 by a third breakpoint connection part 35.

[0139] When the battery cell 20 expands along the second direction, the circuit board 30 will be subjected to a tensile force along the second direction. When the tensile force in the second direction is too large, the first break connection 33 and the second break connection 34 will break. At this time, the second extension segment 32222 extends along the second direction under the action of the tensile force, and drives the first extension segment 32221 to extend along the second direction. Since the first extension segment 32221 and the second extension segment 32222 are arranged in the first direction, when the first extension segment 32221 and the second extension segment 32222 extend along the second direction under the action of the tensile force, they can provide sufficient extension length for the circuit board 30, so that the circuit board 30 can fully absorb the tensile force in the second direction using the extension length, effectively reducing the risk of the circuit board 30 being pulled apart under the action of the tensile force in the second direction, and reducing the possibility of the battery device 100 losing its function.

[0140] If the battery cell 20 expands significantly in the later stages of use, the circuit board 30 will experience a greater tensile force in the second direction. At this time, the first buffer part 3221 and the second buffer part 3222 will extend completely in the second direction, but still cannot completely absorb the tensile force. Then, the third breakpoint connection part 35 will break at this time, reducing the tensile force on the connecting piece 321, thereby allowing the circuit board 30 and the busbar 40 to be connected normally.

[0141] In the above technical solution, by setting the second buffer portion 3222 to include a first extension segment 32221 and a second extension segment 32222 arranged in the first direction, the second buffer portion 3222 can have a longer extension length when extending in the second direction, which effectively reduces the risk of the circuit board 30 being pulled off in the second direction and reduces the possibility of the battery device 100 losing its function; by setting a third breakpoint connection portion 35 at the end of the first extension segment 32221 away from the connecting piece 321 and the end of the first buffer portion 3221 away from the connecting piece 321, it can break when the tensile force in the second direction exceeds the absorption capacity of the buffer piece 322, reducing the effect of the tensile force on the connecting piece 321, so that the circuit board 30 and the busbar 40 can be connected normally.

[0142] Reference Figure 2 and Figure 4 In some embodiments, the housing assembly 10 further includes a cover plate 15 and a bottom plate 16. The cover plate 15 covers one end of the plurality of battery cells 20 in a third direction and is connected to the side plate 11 and the end plate 12. The bottom plate 16 covers the other end of the plurality of battery cells 20 in a third direction and is connected to the side plate 11 and the end plate 12.

[0143] The side plate 11, end plate 12, cover plate 15 and bottom plate 16 can be combined to form the main structure of the housing assembly 10, which can not only reduce the possibility of foreign objects entering the housing cavity 10a, but also absorb some energy when the battery device 100 is subjected to external impact, further protecting the battery cells 20 in the housing cavity 10a.

[0144] Reference Figure 4 , Figures 14-15 The battery device 100 also includes an isolation plate 80, which is disposed between a plurality of battery cells 20 and a cover plate 15 in a third-party direction, and a circuit board 30 is disposed between the isolation plate 80 and the cover plate 15.

[0145] The isolation plate 80 has a limiting post 81, and the circuit board 30 has a limiting hole 30a. The limiting post 81 and the limiting hole 30a are inserted and engaged.

[0146] In the above technical solution, by setting the isolation plate 80, a mounting carrier can be provided for the circuit board 30, which is convenient for fixing the circuit board 30 on the isolation plate 80. The circuit board 30 and the isolation plate 80 can be supplied as a whole, which can effectively reduce production costs. By setting the limiting post 81 on the isolation plate 80 and the limiting hole 30a on the circuit board 30, the circuit board 30 can be fixed after the limiting post 81 and the limiting hole 30a are inserted and matched. This greatly reduces the loosening of the circuit board 30 during the use of the battery device 100 and improves the connection reliability between the circuit board 30 and the electrical connector 50 and between the circuit board 30 and the connector 90.

[0147] Refer again Figure 15 In some embodiments, the battery device 100 further includes a connector 90, which is fixed to one end of the end plate 12 in a third direction by a second fastener 91, and the circuit board 30 is connected to the connector 90 at one end in a second direction.

[0148] The circuit board 30 is a flexible circuit board, and the end of the circuit board 30 near the connector 90 has an arched portion 30b.

[0149] In the later stages of use of the battery device 100, the battery cell 20 may expand in the second direction, causing the end plate 12 to shift away from the battery cell 20 in the second direction. The connector 90 will move along the second direction with the end plate 12, thereby pulling the circuit board 30 in the second direction, which may damage the circuit board 30.

[0150] In the above technical solution, by providing an arched portion 30b at one end of the circuit board 30 near the connector 90, the tensile force along the second direction on the circuit board 30 can be absorbed. Under the action of the tensile force, the arched height of the arched portion 30b gradually decreases, thereby protecting the circuit board 30 and reducing the possibility of the circuit board 30 breaking under the action of the tensile force.

[0151] Reference Figures 18-20 , Figure 18 for Figure 11 Top view of end plate 12 in the middle; Figure 19 for Figure 18 Enlarged view of part E in the image; Figure 20 This is a schematic diagram of the structure of the second fastener 91 of the battery device 100 according to some embodiments of this application. In some specific embodiments, the end plate 12 has a mounting flange 122 at one end in a third direction, and the mounting flange 122 is provided with a second mounting hole 122b. In a second direction, the size of the second mounting hole 122b is larger than the size of the second fastener 91.

[0152] Specifically, if the battery cell 20 expands along the second direction, the end plate 12 will be displaced in the second direction away from the battery cell 20. By setting the size of the second mounting hole 122b to be larger than the size of the second fastener 91, the second fastener 91 moves within the second mounting hole 122b during the displacement of the end plate 12 along the second direction, thereby absorbing a portion of the tensile force.

[0153] This design reduces the possibility of the connector 90 detaching from the circuit board 30, and also lowers the maximum arch height of the arched portion 30b, so that the arched portion 30b does not need to be set with a high arch height to absorb the tension, thereby reducing the impact of the arch height on other structures of the battery device 100.

[0154] Reference Figure 20 In some examples, the second fastener 91 is an injection-molded riveted part.

[0155] Specifically, the injection-molded riveting part has a riveting portion 911, which includes a plurality of locking protrusions 9111, which can engage with the wall of the second mounting hole 122b.

[0156] In the above technical solution, by setting the second fastener 91 as an injection-molded riveting component and providing a riveting part 911 on the riveting component 131, the injection-molded riveting component can be engaged with the hole wall of the second mounting hole 122b through multiple locking protrusions 9111 on the riveting part 911. This makes it less likely for the injection-molded riveting component to loosen when the battery device 100 vibrates or moves within the second mounting hole 122b, thereby reducing the risk of the injection-molded riveting component falling off.

[0157] This application provides an electrical device 1000, which includes the battery device 100 in the above embodiments, and the battery device 100 is used to provide electrical energy to the electrical device 1000.

[0158] According to the embodiments of the present utility model, the power device 1000 can be used normally and has good reliability by setting the power device 1000 to include the battery device 100 in the above embodiments.

[0159] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not 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 modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device (100), characterized in that, It includes a housing assembly (10) and a plurality of battery cells (20), the housing assembly (10) defining a receiving cavity (10a), and the plurality of battery cells (20) disposed in the receiving cavity (10a). The housing assembly (10) includes two side plates (11) and two end plates (12). The two side plates (11) are arranged opposite each other in a first direction and each side plate (11) extends along a second direction. The two end plates (12) are arranged opposite each other in the second direction and each end plate (12) extends along the first direction. The second direction is perpendicular to the first direction. The end plates (12) are sheet metal parts. The two ends of the end plates (12) are respectively connected to the two side plates (11) by a first fastener (13).

2. The battery device (100) according to claim 1, characterized in that, The side plate (11) has a first connecting hole (11a), the end plate (12) has a second connecting hole (12a), the first fastener (13) is a riveting member (131), and the riveting member (131) includes: The riveting body (1311) includes a first connector (13111), a connecting post (13112), and a second connector (13113). The connecting post (13112) passes through the first connecting hole (11a) and the second connecting hole (12a). The first connector (13111) is connected to one end of the connecting post (13112) and stops on the side of the side plate (11) away from the end plate (12). The second connector (13113) is connected to the other end of the connecting post (13112) and stops on the side of the end plate (12) away from the side plate (11).

3. The battery device (100) according to claim 2, characterized in that, The riveting body (1311) has a channel (1311a) in the middle, and the riveting member (131) further includes: A lock cylinder (1312) is inserted through the channel (1311a) and is press-fitted with the riveting body (1311). One end of the lock cylinder (1312) has a lock head (13121). The radial dimension of the lock head (13121) is larger than the radial dimension of the channel (1311a). The lock head (13121) stops on the side of the first connector (13111) away from the side plate (11), or the lock head (13121) stops on the side of the second connector (13113) away from the end plate (12).

4. The battery device (100) according to claim 2, characterized in that, The end plate (12) has connecting flanges (121) at both ends in the first direction that extend away from the battery cell (20), and the connecting flanges (121) are connected to the side plate (11) by the riveting member (131).

5. The battery device (100) according to claim 4, characterized in that, The connecting flange (121) is connected to the side plate (11) by a plurality of the riveting parts (131). The plurality of the riveting parts (131) are arranged in the length direction of the connecting flange (121), and the length direction, the first direction and the second direction of the connecting flange (121) are perpendicular to each other.

6. The battery device (100) according to claim 1, characterized in that, The housing assembly (10) also includes a separator (14) for sealing the gap between the battery cell (20) and the side plate (11).

7. The battery device (100) according to claim 6, characterized in that, The isolation element (14) is located on the upper part of the side plate (11).

8. The battery device (100) according to claim 6, characterized in that, The isolation element (14) is foam.

9. The battery device (100) according to claim 1, characterized in that, The end plate (12) has a first reinforcing part (12b) and a second reinforcing part (12c) in the middle. The first reinforcing part (12b) is a first reinforcing protrusion or a first reinforcing recess, and the second reinforcing part (12c) is a second reinforcing protrusion or a second reinforcing recess. The first reinforcing part (12b) and the second reinforcing part (12c) are arranged crosswise.

10. The battery device (100) according to any one of claims 1-9, characterized in that, The battery cell (20) has an electrode at one end in a third direction, and the third direction, the first direction, and the second direction are arranged perpendicularly to each other. The battery device (100) further includes: A circuit board (30) is disposed at one end of the plurality of battery cells (20) in the third direction; The busbar (40) is electrically connected to the terminal of the battery cell (20); Electrical connector (50) connects the busbar (40) and the circuit board (30).

11. The battery device (100) according to claim 10, characterized in that, The battery device (100) further includes: Output stage mounting base (60), which is fixed to the end plate (12) at one end in the third direction by a fastener (70) to limit the displacement of the output stage mounting base (60) in the third direction, and one of the busbars (40) near the end plate (12) is connected to the output stage mounting base (60).

12. The battery device (100) according to claim 11, characterized in that, The end plate (12) has a mounting flange (122) at one end in the third direction, and the mounting flange (122) is provided with a first mounting hole (122a). The fastener (70) includes a fastener (71) which is formed on the side of the output stage mounting base (60) facing the mounting flange (122) and engages with the first mounting hole (122a).

13. The battery device (100) according to claim 11, characterized in that, The end plate (12) has a mounting flange (122) at one end in the third direction, and the fastener (70) includes a fixing bracket (72), which is detachably disposed on the output stage mounting base (60) and connected to the mounting flange (122).

14. The battery device (100) according to claim 13, characterized in that, The output stage mounting base (60) has a snap-fit ​​(61) on its side, and the fixing bracket (72) includes: The first snap-fit ​​portion (721) engages with the snap-fit ​​member (61); The second snap-fit ​​part (722) snaps onto the side of the mounting flange (122) away from the output stage mounting base (60); The connecting part (723) is located on one side of the output stage mounting base (60) and connects the first snap-fit ​​part (721) and the second snap-fit ​​part (722).

15. The battery device (100) according to claim 14, characterized in that, The snap-fit ​​(61) is an elastic snap-fit, and the output stage mounting base (60) has an opening (60a). One side edge of the opening (60a) is connected to one end of the elastic snap-fit, and the remaining edge has a gap with the elastic snap-fit. The first snap-fit ​​part (721) includes two snap hooks (7211), which are respectively inserted into the gaps on both sides of the elastic buckle and engage with the elastic buckle.

16. The battery device (100) according to claim 10, characterized in that, The circuit board (30) is a flexible circuit board and includes: The circuit board body (31) has a mounting notch (31a) on one side edge, and the mounting notch (31a) has a first edge (31a1) and a second edge (31a2) disposed opposite to each other in the second direction. A flexible connector (32) is located at the mounting notch (31a) and includes a connecting piece (321) and a buffer piece (322). The connecting piece (321) and the buffer piece (322) are arranged in the second direction. A first breakpoint connection part (33) is connected between the connecting piece (321) and the first edge (31a1), and the buffer piece (322) is connected to the second edge (31a2). The buffer sheet (322) includes a first buffer part (3221) and a second buffer part (3222). The first buffer part (3221) and the second buffer part (3222) both extend along the second direction and are arranged in the first direction. The first buffer part (3221) is located between the second buffer part (3222) and the circuit board body (31). One end of the first buffer part (3221) is connected to the connecting piece (321) and the other end is connected to the second buffer part (3222). The connecting piece (321) and the second buffer part (3222) are connected by a second breakpoint connection part (34).

17. The battery device (100) according to claim 16, characterized in that, The second buffer section (3222) includes a first extension section (32221) and a second extension section (32222). Both the first extension section (32221) and the second extension section (32222) extend along the second direction and are arranged in the first direction. The first extension section (32221) is located between the second extension section (32222) and the first buffer section (3221). Wherein, the first extension segment (32221) is connected to the end near the connecting piece (321) and the second extension segment (32222) is connected to the end near the connecting piece (321), and the connection position of the two is connected to the connecting piece (321) by a second breakpoint connection part (34). The end of the second extension segment (32222) away from the connecting piece (321) is connected to the second edge (31a2). The end of the first extension segment (32221) away from the connecting piece (321) is connected to the end of the first buffer part (3221) away from the connecting piece (321), and the connection position of the two is connected to the second edge (31a2) by a third breakpoint connection part (35).

18. The battery device (100) according to claim 10, characterized in that, The housing assembly (10) further includes a cover plate (15) that covers one end of the plurality of battery cells (20) in the third direction and is connected to the side plate (11) and the end plate (12); the battery device (100) further includes: An isolation plate (80) is disposed between a plurality of battery cells (20) and a cover plate (15) in the third direction, and a circuit board (30) is disposed between the isolation plate (80) and the cover plate (15); The isolation plate (80) has a limiting post (81), the circuit board (30) has a limiting hole (30a), and the limiting post (81) and the limiting hole (30a) are inserted into each other.

19. The battery device (100) according to claim 10, characterized in that, The battery device (100) further includes: A connector (90) is fixed to the end plate (12) at one end in the third direction by a second fastener (91), and the circuit board (30) is connected to the connector (90) at one end in the second direction; The circuit board (30) is a flexible circuit board, and the end of the circuit board (30) near the connector (90) has an arch (30b).

20. The battery device (100) according to claim 19, characterized in that, The end plate (12) has a mounting flange (122) at one end in the third direction, and the mounting flange (122) is provided with a second mounting hole (122b). In the second direction, the size of the second mounting hole (122b) is larger than the size of the second fastener (91).

21. The battery device (100) according to claim 20, characterized in that, The second fastener (91) is an injection-molded riveted part.

22. An electrical appliance (1000), characterized in that, Includes the battery device (100) according to any one of claims 1-21.

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