Pot body assembly, battery device and electric equipment

Abstract

The utility model discloses a basin body assembly, a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a battery box body and a battery monomer arranged in the battery box body, the battery box body comprises the basin body assembly, and the basin body assembly comprises a basin body, an expansion beam and a connecting piece; the pot body is provided with a mounting surface, the mounting surface is provided with a transition plate, and the transition plate is provided with a connecting hole; the expansion beam is arranged on the basin body and is provided with a mounting hole; and the connecting piece penetrates through the mounting hole and is inserted into the connecting hole. According to the technical scheme, the problem that air leakage is prone to occurring due to the fact that holes are formed in the pot body can be solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a basin assembly, a battery device and an electrical device. Background Art

[0002] The battery expansion beam is the main energy-absorbing component of the battery and is crucial to the stable and reliable operation of the battery. The expansion beam is usually installed on the basin of the battery box.

[0003] In the related art, the expansion beam is connected to the basin body by bolts. Specifically, an opening is provided in the basin body, and a nut is installed in the opening. The bolt is passed through the expansion beam and then installed on the nut of the basin body. However, in actual application, the nut may be easily deformed and leak when the battery is hit. Utility Model Content

[0004] In view of the above problems, the present application provides a basin assembly, a battery device and an electrical device, aiming to solve the problem that the basin is prone to air leakage due to the opening.

[0005] The present application provides a battery device, including a battery case and a battery cell arranged in the battery case, the battery case including a basin assembly, the basin assembly including a basin, an expansion beam and a connecting piece; the basin is provided with a mounting surface, the mounting surface is provided with a transition plate, the transition plate is provided with a connecting hole; the expansion beam is provided in the basin, the expansion beam is provided with a mounting hole; the connecting piece is passed through the mounting hole and inserted into the connecting hole.

[0006] In the technical solution of the embodiment of the present application, the technical solution of the present application is to add a transition plate to the basin body, to open a connection hole on the transition plate, and to open a mounting hole on the expansion beam. During installation, the connector is directly passed through the mounting hole of the expansion beam and inserted into the connection hole of the transition plate, and the expansion beam and the basin body can be connected by the connector. Therefore, there is no need to set an opening on the basin body, and the basin body will not leak after the battery is hit, thereby effectively solving the problem of the basin body being prone to leakage due to the opening.

[0007] In some embodiments, the transition plate is welded to the mounting surface of the basin body. Such a design, by welding the transition plate to the mounting surface of the basin body, is not only simple to operate, but also makes the connection reliability between the transition plate and the basin body higher.

[0008] In some embodiments, the connecting member is a bolt or a blind rivet. Such a design uses bolts or blind rivets as connecting members to achieve the connection between the transition plate and the expansion beam. Due to the high strength of the bolts and the blind rivets themselves, the connection reliability between the transition plate and the expansion beam can be improved.

[0009] In some embodiments, when the connecting member is a bolt, a nut is provided at the connecting hole, and the connecting member is passed through the mounting hole and inserted into the nut. With such a design, during installation, the bolt can be passed through the mounting hole of the expansion beam and inserted into the nut at the connecting hole to achieve effective connection between the expansion beam and the transition plate, and it is also convenient to disassemble the bolt.

[0010] In some embodiments, the nut is welded to the transition plate. Such a design, by welding the nut to the transition plate, is not only simple to operate, but also makes the connection between the nut and the transition plate more reliable.

[0011] In some embodiments, a mounting portion is provided on one side of the expansion beam, the mounting portion abuts against a side surface of the transition plate away from the basin, and the mounting portion is provided with a mounting hole. In this design, by providing a mounting hole on the mounting portion on one side of the expansion beam, there is no need to provide a mounting hole on the expansion beam structure itself, thereby avoiding the installation hole from affecting the energy absorption effect of the expansion beam.

[0012] In some embodiments, the expansion beam has a length direction, the mounting portion extends along the length direction of the expansion beam, and is provided with a plurality of mounting holes spaced along the length direction of the expansion beam; or, the mounting portion includes a plurality of mounting ears, the plurality of mounting ears are spaced along the length direction of the expansion beam, and one mounting ear is provided with a mounting hole; the transition plate is provided with a plurality of connecting holes, one connecting hole is arranged opposite to one mounting hole; at least one connecting member is provided; one connecting member is passed through one mounting hole and inserted into one connecting hole. Such a design, using one, two or more connecting members to simultaneously connect the expansion beam and the transition plate, can improve the connection reliability between the expansion beam and the transition plate.

[0013] In some embodiments, an escape space is formed between the transition plate and the mounting surface of the basin, and the connector part extends into the escape space. With such a design, when the connector passes through the mounting hole of the expansion beam and is inserted into the connecting hole of the transition plate, the end of the connector will extend to the side of the transition plate close to the basin. Therefore, by forming an escape space between the transition plate and the mounting surface of the basin, the end of the connector can be extended into the escape space, which can avoid compression between the end of the connector and the mounting surface of the basin, thereby affecting the strength of the basin.

[0014] In some embodiments, an adhesive layer is provided between the transition plate and the expansion beam. Such a design, using the adhesive layer design can further enhance the connection strength between the transition plate and the expansion beam.

[0015] In some embodiments, the connector is detachably inserted through the mounting hole and inserted into the connecting hole. With such a design, since at least one side of the expansion beam needs to be installed with a battery cell, by making the connector detachably inserted through the mounting hole and inserted into the connecting hole, when the expansion beam and the battery cell need to be assembled, the connector can be removed first, thereby facilitating the assembly of the expansion beam and the battery cell.

[0016] The present application also provides a basin body assembly, which includes a basin body, an expansion beam and a connecting piece; the basin body is provided with a mounting surface, the mounting surface is provided with a transition plate, and the transition plate is provided with a connecting hole; the expansion beam is provided on the basin body, and the expansion beam is provided with a mounting hole; the connecting piece is passed through the mounting hole and inserted into the connecting hole.

[0017] The present application also provides an electrical device, comprising the above-mentioned battery device.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a structural schematic diagram of an embodiment of a basin assembly of the present application;

[0021] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 This is a schematic diagram of the structure of a basin assembly according to an embodiment of the present application during installation;

[0023] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0024] Figure 5 This is a front view of an embodiment of a basin assembly of the present application;

[0025] Figure 6 for Figure 5 Sectional view at CC;

[0026] Figure 7 for Figure 6 A partial enlarged view of point D in the middle;

[0027] Figure 8 for Figure 6 A partial enlarged view of point E in the middle;

[0028] Fig. 9 An exploded view of an embodiment of a battery device of the present application;

[0029] Fig.10 This is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0030] Description of Figure Numbers:

[0031]

[0032] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0038] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] The battery device mentioned in this field is also called a battery. It can be divided into disposable batteries and rechargeable batteries according to whether it is rechargeable. The common types of rechargeable batteries are: lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively low, but they have larger output and charging current, and also have a longer service life, but the cost is higher.

[0041] The battery described in the embodiments of the present application refers to a rechargeable battery. The embodiments disclosed in the present application will be described below mainly by taking a lithium-ion battery as an example. It should be understood that the embodiments disclosed in the present application are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to an appropriate device to power the device.

[0042] The battery mentioned in the embodiments disclosed in this application refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity. Battery cells are the basic units in the battery, and can generally be divided into: cylindrical battery cells, rectangular battery cells and soft-pack battery cells according to the packaging method. The following will mainly focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells or soft-pack battery cells in some aspects.

[0043] A battery cell includes a positive electrode sheet, a negative electrode sheet, an electrolyte and a separator. Lithium-ion battery cells mainly rely on the movement of lithium ions between the positive electrode sheet and the negative electrode sheet to work. In cylindrical battery cells, the film structure of three layers of material is wound into a cylindrical electrode assembly, while in rectangular battery cells, the film structure is wound or stacked into an electrode assembly with a roughly rectangular shape.

[0044] In a common battery cell structure, the battery cell includes a shell, an electrode assembly and an electrolyte. The electrode assembly is contained in the shell of the battery cell, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The shell includes a shell and an end cap. The shell includes a housing formed by a plurality of walls and an opening. The end cap is arranged at the opening to close the housing chamber. In addition to the electrode assembly, the housing chamber also contains an electrolyte. The positive electrode sheet and the negative electrode sheet in the electrode assembly include tabs. In order to avoid passing a large current without melting, the number of positive tabs is multiple and stacked together, and the number of negative tabs is multiple and stacked together. The tabs are electrically connected to the electrode terminals located outside the battery cell through connecting members, and the electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For a rectangular battery cell, the electrode terminal is generally arranged at the end cap portion. A plurality of battery cells are connected in series and / or in parallel via the electrode terminals for application in various applications.

[0045] In some high-power applications such as electric vehicles, the application of batteries includes three levels: battery cells, battery modules and batteries. The battery module is formed by electrically connecting a certain number of battery cells together and placing them in a frame in order to protect the battery cells from external impact, heat, vibration, etc. The battery refers to the final state of the battery system installed in the electric vehicle. The battery generally includes a battery box for encapsulating one or more battery cells.

[0046] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a battery box and multiple battery cells contained in the battery box. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of safety. At present, the mechanical safety of power batteries during use is one of the battery safety issues that consumers generally care about.

[0047] The battery provided in the embodiment of the present application can be a power source for electric devices. The electric devices can be mobile phones, portable devices, laptop computers, battery cars, electric cars, ships, spacecraft, electric toys and electric tools, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0048] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0049] For example, Fig.10 This is a structural diagram of an embodiment of a vehicle 1000 of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. A battery device 100, a controller 200 and a motor 300 may be provided inside the vehicle 1000. The controller 200 is used to control the battery device 100 to power the motor 300. For example, a battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power demand during the start, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0050] For example, see Fig. 9 , Fig. 9It is an exploded view of an embodiment of a battery device 100 of the present application. The battery device 100 includes a battery case 10 and a battery cell 20, and the battery case 10 has a storage space for accommodating the battery cell 20. Among them, the battery case 10 can adopt a variety of structures. In some embodiments, the battery case 10 may include a first part 10a and a second part 10b, and the first part 10a and the second part 10b cover each other, and the first part 10a and the second part 10b jointly define a storage space for accommodating the battery cell 20. The second part 10b can be a hollow structure with one end open, and the first part 10a can be a plate-like structure, and the first part 10a covers the open side of the second part 10b, so that the first part 10a and the second part 10b jointly define a storage space; the first part 10a and the second part 10b can also be hollow structures with one side open, and the open side of the first part 10a covers the open side of the second part 10b. Of course, the battery box 11 formed by the first part 10a and the second part 10b can be in various shapes, such as a cylinder, a cuboid, etc.

[0051] In the battery device 100, there can be one or more battery cells 20. When the battery device 100 has multiple battery cells 20, the multiple battery cells 20 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the battery box 10; of course, the battery device 100 can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the battery box 10.

[0052] The battery expansion beam is the main energy-absorbing component of the battery and is crucial to the stable and reliable operation of the battery. The expansion beam is usually installed on the basin of the battery box.

[0053] In the related art, the expansion beam is a component used to limit the amount of expansion of a battery cell. A battery cell needs to be installed on at least one side of the expansion beam. In order to facilitate the assembly of the expansion beam and the battery cell, the expansion beam is usually not directly welded to the basin body, but is connected to the basin body with bolts. Specifically, an opening is provided in the basin body, and a nut is installed in the opening. The bolt is passed through the expansion beam and then installed on the nut of the basin body. However, in actual application, the nut may be easily deformed and leak when the battery is hit.

[0054] Based on the above problems, the present application proposes a battery device 100, which aims to solve the problem that the basin body 31 is prone to leakage due to the opening. The battery device 100 is described in detail below with reference to specific drawings and embodiments.

[0055] See also Figures 1 to 8 In one embodiment of the present application, the battery device 100 includes a battery case 10 and a battery cell 20 arranged in the battery case 10, the battery case 10 includes a basin assembly 30, the basin assembly 30 includes a basin 31, an expansion beam 33 and a connecting piece 34; the basin 31 is provided with a mounting surface, the mounting surface is provided with a transition plate 32, the transition plate 32 is provided with a connecting hole 321; the expansion beam 33 is provided on the basin 31, the expansion beam 33 is provided with a mounting hole 331; the connecting piece 34 is passed through the mounting hole 331 and inserted into the connecting hole 321.

[0056] In this embodiment, the basin 31 in the basin assembly 30 can be the bottom plate or cover plate of the battery box 10, that is, the expansion beam 33 can be installed on the top surface of the bottom plate or the bottom surface of the cover plate. It can be understood that when the basin 31 is the bottom plate of the battery box 10, the top surface of the bottom plate is the installation surface; when the basin 31 is the cover plate of the battery box 10, the bottom surface of the cover plate is the installation surface.

[0057] The transition plate 32 can serve as a transition connection between the basin body 31 and the expansion beam 33, and can also serve to strengthen the basin body 31. In practical applications, the transition plate 32 can be connected to the installation surface of the basin body 31 by welding, bonding, integral molding, etc., as long as no opening is required on the basin body 31, and no specific limitation is made here. The transition plate 32 can be a profile plate or a transition plate with a certain thickness. When the connector 34 is inserted into the installation hole 331 and inserted into the connection hole 321, the connector 34 will not pass through the basin body 31, and therefore will not affect the sealing of the basin body 31.

[0058] The expansion beam 33 is a component used to limit the expansion amount of the battery cell 20. The expansion beam 33 can be a metal part. It is understandable that the material of the expansion beam 33 is metal, such as aluminum, aluminum alloy, iron, stainless steel, copper, etc., which is not specifically limited here. Of course, the expansion beam 33 can also be a non-metallic part. It is understandable that the material of the expansion beam 33 is non-metal, such as plastic, carbon fiber, wood, etc., which is not specifically limited here. Optionally, at least two expansion beams 33 are provided, and at least two expansion beams 33 are arranged on opposite sides of the basin body 31. The battery cell 20 is clamped between the at least two expansion beams 33, so that the battery cell 20 is clamped by the at least two expansion beams 33. When there are at least two expansion beams 33, the materials of the at least two expansion beams 33 can be the same or different. The expansion beam 33 can be arranged on the mounting surface of the basin body 31.

[0059] When some of the multiple battery cells 20 expand, the expansion force acts on the expansion beams 33 on both sides, causing the material inside the expansion beams 33 to deform. This deformation consumes part of the energy of the expansion force, thereby generating an extrusion force that reacts on the battery cells 20 to limit the expansion of the battery cells 20 and absorb energy, thereby improving the safety performance of the battery.

[0060] The connector 34 refers to a connecting structural member used to connect the expansion beam 33 and the transition plate 32. The connector 34 can be a connecting structure such as a bolt 34a, a rivet, or a pin, as long as it can achieve an effective connection between the expansion beam 33 and the transition plate 32. Before assembling the expansion beam 33 and the battery cell 20, the connector 34 can be removed first. After the assembly is completed, the connector 34 is passed through the mounting hole 331 and inserted into the connecting hole 321 to facilitate the assembly of the expansion beam 33 and the battery cell 20.

[0061] The expansion beam 33 and the transition plate 32 may be connected by one or at least two connecting members 34. When at least two connecting members 34 are used, the structures of the at least two connecting members 34 may be the same or different.

[0062] In summary, in the technical solution of the embodiment of the present application, the technical solution of the present application is to add a transition plate 32 to the basin body 31, to open a connection hole 321 on the transition plate 32, and to open a mounting hole 331 on the expansion beam 33. During installation, the connector 34 is directly passed through the mounting hole 331 of the expansion beam 33 and inserted into the connection hole 321 of the transition plate 32, and the connector 34 can be used to achieve the connection between the expansion beam 33 and the basin body 31, so there is no need to set an opening on the basin body 31, and the basin body 31 will not leak after the battery is hit, thereby effectively solving the problem that the basin body 31 is prone to leaking due to the opening.

[0063] See also Figure 1 , Figure 2 In one embodiment of the present application, the transition plate 32 is welded to the mounting surface of the basin body 31 .

[0064] Such a design, in which the transition plate 32 is connected to the mounting surface of the basin body 31 by welding, is not only simple to operate, but also makes the connection reliability between the transition plate 32 and the basin body 31 higher.

[0065] In actual application, the transition plate 32 can be connected to the mounting surface of the basin body 31 by spot welding, arc welding, laser welding or other welding methods. Of course, in one embodiment, the transition plate 32 can be connected to the mounting surface of the basin body 31 by spot welding, which can reduce welding costs while improving connection reliability.

[0066] See also Figure 2, Figure 4 In one embodiment of the present application, the connecting member 34 is a bolt 34a or a blind rivet 34b.

[0067] Such a design uses bolts 34a or blind rivets 34b as connecting parts 34 to achieve the connection between the transition plate 32 and the expansion beam 33. Since the bolts 34a and the blind rivets 34b themselves have high strength, the connection reliability between the transition plate 32 and the expansion beam 33 can be improved.

[0068] It should be noted that the core-pulling rivet 34b is also called a blind rivet, which includes a rivet body and a rivet core. It is a single-sided riveting method and requires a special tool, a rivet gun (manual, electric, or pneumatic), for riveting. During the riveting process, the special rivet gun pulls the rivet core to expand the rivet body, thereby achieving a riveting effect between the transition plate 32 and the expansion beam 33.

[0069] See also Figure 7 In one embodiment of the present application, when the connecting member 34 is a bolt 34 a , a nut 322 is provided at the connecting hole 321 , and the connecting member 34 is passed through the mounting hole 331 and inserted into the nut 322 .

[0070] With such a design, during installation, the bolt 34a can be passed through the mounting hole 331 of the expansion beam 33 and inserted into the nut 322 at the connecting hole 321 to achieve an effective connection between the expansion beam 33 and the transition plate 32, while also facilitating the removal of the bolt 34a.

[0071] In practical applications, the nut 322 can be welded to the connection hole 321 of the transition plate 32, or can be connected to the connection hole 321 of the transition plate 32 by bonding, riveting, or the like.

[0072] See also Figure 7 In one embodiment of the present application, the nut 322 is welded to the transition plate 32 .

[0073] Such a design, in which the nut 322 is connected to the transition plate 32 by welding, is not only easy to operate, but also makes the connection reliability between the nut 322 and the transition plate 32 higher.

[0074] In practical applications, the nut 322 can be connected to the mounting surface of the basin body 31 by projection welding, spot welding, arc welding, laser welding, etc. Of course, in one embodiment, the nut 322 can be connected to the connection hole 321 of the transition plate 32 by projection welding. This method can weld multiple welding points at the same time in one welding cycle, which not only has high productivity, but also has no shunting effect. At the same time, the position of the projection point is accurate, the size is consistent, and the strength of each point is relatively uniform.

[0075] See also Figure 2 , Figure 4 In one embodiment of the present application, a mounting portion 33a is provided on one side of the expansion beam 33, the mounting portion 33a abuts against a side surface of the transition plate 32 away from the basin body 31, and the mounting portion 33a is provided with a mounting hole 331.

[0076] The mounting portion 33a refers to a sheet, plate, block, or other structural member protruding from one side of the expansion beam 33. In some embodiments, the mounting portion 33a may be disposed on a side of the expansion beam 33 away from the battery cell 20 to facilitate installation of the connector 34.

[0077] Such a design, by opening a mounting hole 331 on the mounting portion 33a on one side of the expansion beam 33, eliminates the need to open the mounting hole 331 on the structure of the expansion beam 33 itself, thereby avoiding the influence of the mounting hole 331 on the energy absorption effect of the expansion beam 33.

[0078] See also Figure 2 , Figure 4 In one embodiment of the present application, the expansion beam 33 has a length direction, the mounting portion 33a extends along the length direction of the expansion beam 33, and is provided with a plurality of mounting holes 331 arranged at intervals along the length direction of the expansion beam 33; or, the mounting portion 33a includes a plurality of mounting ears 332, and the plurality of mounting ears 332 are distributed at intervals along the length direction of the expansion beam 33, and one mounting ear 332 is provided with a mounting hole 331; the transition plate 32 is provided with a plurality of connecting holes 321, and one connecting hole 321 is arranged opposite to one mounting hole 331; at least one connecting member 34 is provided; one connecting member 34 is passed through one mounting hole 331 and inserted into one connecting hole 321.

[0079] In this embodiment, the mounting portion 33 a may be a whole mounting plate extending along the length direction of the expansion beam 33 ; or, the mounting portion 33 a may also include a plurality of mounting ears 332 spaced apart along the length direction of the expansion beam 33 .

[0080] Such a design, using one, two or more connecting members 34 to simultaneously connect the expansion beam 33 and the transition plate 32 , can improve the connection reliability between the expansion beam 33 and the transition plate 32 .

[0081] In some embodiments, at least one of the bolt 34a and the blind rivet 34b is provided; at least one bolt 34a is passed through a mounting hole 331 and inserted into a connecting hole 321; at least one blind rivet 34b is passed through a mounting hole 331 and inserted into a connecting hole 321.

[0082] Such a design has its own advantages when using bolts 34a and blind rivets 34b as connecting parts 34. The connection using bolts 34a not only has high connection reliability, but also is easy to disassemble and assemble; while the connection using blind rivets 34b has good air tightness and high riveting strength. Therefore, at least one bolt 34a and at least one blind rivet 34b are used to realize the connection between the expansion beam 33 and the transition plate 32. The respective advantages of bolts 34a and blind rivets 34b can be combined to effectively improve the connection reliability between the expansion beam 33 and the transition plate 32.

[0083] In some embodiments, in order to further improve the connection reliability between the expansion beam 33 and the transition plate 32, the two mounting ears 332 near the two ends of the expansion beam 33 can use bolts 34a to achieve the connection between the mounting ears 332 and the transition plate 32, while the remaining mounting ears 332 use blind rivets 34b to achieve the connection between the mounting ears 332 and the transition plate 32.

[0084] One or at least two mounting holes 331 may be provided on each mounting hole 331. It is understandable that one or at least two bolts 34a may be used to realize the connection between the mounting ear 332 and the transition plate 32, or one or at least two blind rivets 34b may be used to realize the connection between the mounting ear 332 and the transition plate 32.

[0085] See also Figure 7 , Figure 8 In one embodiment of the present application, an escape space 31 a is formed between the transition plate 32 and the mounting surface of the basin body 31 , and a portion of the connecting member 34 extends into the escape space 31 a .

[0086] In this embodiment, the transition plate 32 may be a profile plate, and the profile plate itself has a cavity inside, and the cavity may constitute the avoidance space 31a; or, the transition plate 32 may also be an ordinary transition plate, and the avoidance space 31a is opened inside the transition plate. In some embodiments, the transition plate 32 may include a plate body and a surrounding plate, the plate body is arranged opposite to the mounting surface of the basin body 31, the connection hole 321 is opened on the plate body, the surrounding plate is arranged around the edge of the plate body and extends toward the mounting surface of the basin body 31, the side of the surrounding plate away from the plate body is connected to the mounting surface of the basin body 31, and the plate body, the surrounding plate and the basin body 31 are enclosed to form the avoidance space 31a.

[0087] With such a design, when the connecting member 34 passes through the mounting hole 331 of the expansion beam 33 and is inserted into the connecting hole 321 of the transition plate 32, the end of the connecting member 34 will extend to the side of the transition plate 32 close to the basin body 31. Therefore, by forming an escape space 31a between the transition plate 32 and the mounting surface of the basin body 31, the end of the connecting member 34 can be extended into the escape space 31a, which can avoid being squeezed between the end of the connecting member 34 and the mounting surface of the basin body 31 and affecting the strength of the basin body 31.

[0088] See also Figure 8 In one embodiment of the present application, an adhesive layer 35 is provided between the transition plate 32 and the expansion beam 33 .

[0089] The adhesive layer 35 refers to a structure used to bond the transition plate 32 and the expansion beam 33 together. Specifically, glue can be applied on the side of the transition plate 32 close to the expansion beam 33, or on the side of the expansion beam 33 close to the transition plate 32. When the transition plate 32 and the expansion beam 33 are assembled, the adhesive layer 35 can be formed between the transition plate 32 and the expansion beam 33 after the glue solidifies.

[0090] Such a design using an adhesive layer can further enhance the connection strength between the transition plate 32 and the expansion beam 33 .

[0091] See also Figure 2 In one embodiment of the present application, the connecting member 34 is detachably inserted into the mounting hole 331 and inserted into the connecting hole 321 .

[0092] With such a design, since at least one side of the expansion beam 33 needs to be installed with the battery cell 20, by making the connecting member 34 detachably pass through the installation hole 331 and inserted into the connecting hole 321, when it is necessary to assemble the expansion beam 33 and the battery cell 20, the connecting member 34 can be removed first, thereby facilitating the assembly of the expansion beam 33 and the battery cell 20.

[0093] See also Figures 1 to 8 The present application also proposes a basin assembly 30, which includes a basin 31, an expansion beam 33 and a connecting piece 34; the basin 31 is provided with a mounting surface, the mounting surface is provided with a transition plate 32, and the transition plate 32 is provided with a connecting hole 321; the expansion beam 33 is provided on the mounting surface, and the expansion beam 33 is provided with a mounting hole 331; the connecting piece 34 is passed through the mounting hole 331 and inserted into the connecting hole 321.

[0094] According to some embodiments of the present application, the present application provides a battery device 100 including a basin assembly 30, see Figures 1 to 8The battery device 100 includes a battery box and a battery cell 20 disposed in a battery box 10. The battery box 10 includes a basin assembly 30. The basin assembly 30 includes a basin 31, an expansion beam 33, and a connector 34. The basin 31 is provided with a mounting surface. A transition plate 32 is welded on the mounting surface of the basin 31. The transition plate 32 is provided with a connecting hole 321. The expansion beam 33 is provided in the basin. The expansion beam 33 is provided with a mounting hole 331. The connector 34 is detachably inserted into the mounting hole 331 and inserted into the connecting hole 321. The connector 34 may be a bolt 34a or a blind rivet 34b.

[0095] In the technical solution of the embodiment of the present application, the technical solution of the present application is to add a transition plate 32 to the basin body 31, so as to open a connection hole 321 on the transition plate 32, and to open a mounting hole 331 on the expansion beam 33. During installation, the connector 34 is directly and detachably passed through the mounting hole 331 of the expansion beam 33 and inserted into the connection hole 321 of the transition plate 32, so that the expansion beam 33 and the basin body 31 can be connected by the connector 34. Therefore, there is no need to set an opening on the basin body 31, and the basin body 31 will not leak after the battery is hit, so that the problem of the basin body 31 being prone to leakage due to the opening can be effectively solved. The transition plate 32 is connected to the mounting surface of the basin body 31 by welding, which is not only simple to operate, but also makes the connection reliability between the transition plate 32 and the basin body 31 higher. Bolts 34a or blind rivets 34b are used as connecting parts 34 to achieve the connection between the transition plate 32 and the expansion beam 33. Since the bolts 34a and the blind rivets 34b have high strength, the connection reliability between the transition plate 32 and the expansion beam 33 can be improved.

[0096] The present application also proposes an electrical device, which includes a battery device 100. The specific structure of the battery device 100 refers to the above embodiment. Since the electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0097] The above description is only an exemplary embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that: The invention comprises a battery box and a battery cell arranged in the battery box, wherein the battery box comprises a basin assembly, and the basin assembly comprises: The basin body is provided with a mounting surface, the mounting surface is provided with a transition plate, and the transition plate is provided with a connecting hole; An expansion beam is arranged on the basin body, and the expansion beam is provided with a mounting hole; A connecting piece is passed through the mounting hole and inserted into the connecting hole.

2. The battery device according to claim 1, characterized in that The transition plate is welded to the mounting surface of the basin body.

3. The battery device according to claim 1, characterized in that: The connecting piece is a bolt or a blind rivet.

4. The battery device according to claim 3, characterized in that: When the connecting member is a bolt, a nut is provided at the connecting hole, and the connecting member is passed through the mounting hole and inserted into the nut.

5. The battery device according to claim 4, characterized in that: The nut is welded to the transition plate.

6. The battery device according to claim 1, wherein: A mounting portion is provided on one side of the expansion beam, the mounting portion abuts against a side surface of the transition plate away from the basin body, and the mounting portion is provided with the mounting hole.

7. The battery device according to claim 6, characterized in that: The expansion beam has a length direction, the mounting portion extends along the length direction of the expansion beam, and is provided with a plurality of mounting holes spaced apart along the length direction of the expansion beam; Alternatively, the mounting portion includes a plurality of mounting ears, the plurality of mounting ears are spaced apart along the length direction of the expansion beam, and one mounting ear is provided with one mounting hole; The transition plate is provided with a plurality of the connecting holes, and one of the connecting holes is arranged opposite to one of the mounting holes; the connecting member is provided with at least one, and one of the connecting members is passed through one of the mounting holes and inserted into one of the connecting holes.

8. The battery device according to any one of claims 1 to 7, characterized in that: An escape space is formed between the transition plate and the mounting surface of the basin body, and the connecting member partially extends into the escape space.

9. The battery device according to any one of claims 1 to 7, characterized in that: An adhesive layer is provided between the transition plate and the expansion beam.

10. The battery device according to any one of claims 1 to 7, characterized in that: The connecting piece is detachably arranged through the mounting hole and inserted into the connecting hole.

11. A basin assembly, characterized in that: include: The basin body is provided with a mounting surface, the mounting surface is provided with a transition plate, and the transition plate is provided with a connecting hole; An expansion beam is arranged on the basin body, and the expansion beam is provided with a mounting hole; A connecting piece is passed through the mounting hole and inserted into the connecting hole.

12. An electrical device, characterized in that: A battery device comprising the battery device as claimed in any one of claims 1 to 10.

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