Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment. The battery device comprises a box body and a battery assembly, and a containing space is formed in the box body. The liquid cooling plate, the plurality of battery monomers and the cross beam, all the battery monomers and the cross beam for limiting the displacement of all the battery monomers are jointly adhered to the liquid cooling plate, and the liquid cooling plate, the plurality of battery monomers and the cross beam are integrated into a battery assembly. Wherein the battery assembly is contained in the containing space, the liquid cooling plate is connected with the box body, the box body is provided with a connecting hole penetrating through the interior and the exterior of the box body, and the connecting piece penetrates through the connecting hole to connect the box body and the cross beam. According to the battery device, the liquid cooling plate, the battery monomer and the cross beam are integrated into the battery assembly, the whole battery assembly is fixed in the box body, when the battery assembly is assembled, the liquid cooling plate is used as an independent part, and the flatness of the surface, bonded with the battery monomer and the cross beam, of the liquid cooling plate can be ensured by using an external tool, so that a gap between the battery monomer and the liquid cooling plate is reduced; therefore, the adhesive material can uniformly fill the gap between the two parts, and the bonding firmness between the two parts is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Art

[0002] The CTP (Cell To Pack) module-free technology directly integrates battery cells into battery devices. Compared with the MTP (Module To Pack), it eliminates the module forming process, reduces the number of parts in the battery device, improves the energy density of the battery pack, and reduces the subsequent management costs of the battery device.

[0003] The battery device usually includes a box, a liquid cooling plate and a number of battery cells. The liquid cooling plate is integrated in the box, and the battery cells are fixed to the liquid cooling plate by gluing. When gluing the battery cells, glue must be applied to the liquid cooling plate first. However, when applying glue, the flatness of the glued surface of the liquid cooling plate is prone to be poor, resulting in a relatively large gap between the local position of the bottom of the battery cell and the liquid cooling plate. The glue cannot fill the gap, and it is difficult to ensure the bonding quality between the battery cell and the liquid cooling plate. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical equipment, which can improve the flatness of the glue coating surface of the liquid cooling plate during glue coating, reduce the gap between the local position of the battery cell and the liquid cooling plate, and thus improve the bonding quality between the battery cell and the liquid cooling plate.

[0005] In a first aspect, the present application provides a battery device, the battery device comprising:

[0006] A box body having a receiving space formed therein;

[0007] A liquid cooling plate, a plurality of battery cells and a cross beam, all the battery cells and the cross beam used to limit the displacement of all the battery cells are bonded to the liquid cooling plate, and the three are integrated into a battery assembly;

[0008] The battery assembly is accommodated in the accommodating space, the liquid cooling plate is connected to the box body, and the box body is provided with a connecting hole that passes through the inside and outside of the box body, and the connecting piece is passed through the connecting hole to connect the box body and the crossbeam.

[0009] The battery device provided in the embodiment of the present application is integrated into a battery assembly by bonding a plurality of battery cells and a crossbeam that limits the displacement of all battery cells to a liquid cooling plate. The battery assembly is installed in the accommodating space of the box body, and the battery assembly is fixed in the box body by connecting the liquid cooling plate and the crossbeam to the box body. By setting a connection hole that passes through the inside and outside of the box body on the box body, a connection hole can be set from the outside of the box body to connect the crossbeam and the box body, so as to solve the problem that the liquid cooling plate, the battery cell and the crossbeam are integrated and placed in the box body as a whole, and it is inconvenient to fix the crossbeam. When assembling the battery assembly, the liquid cooling plate, as an independent component, can use external tooling to ensure the flatness of the surface of the liquid cooling plate, the battery cell and the crossbeam to reduce the gap between the battery cell and the liquid cooling plate, so that the glue can evenly fill the gap between the battery cell and the liquid cooling plate, thereby improving the bonding firmness between the battery cell and the liquid cooling plate.

[0010] In some embodiments, the housing comprises:

[0011] The frame surrounds the battery cell and the crossbeam; the opposite ends of the crossbeam are respectively connected to the frame.

[0012] The battery device provided in the embodiment of the present application realizes the connection between the battery assembly and the box body by connecting the opposite ends of the crossbeam to the frame respectively. At the same time, on the basis of the crossbeam being bonded to the liquid cooling plate, the crossbeam is further fixed by connecting to the frame so that the crossbeam provides a stable contact force to the battery cell.

[0013] In some embodiments, the frame encloses a receiving space, and the liquid cooling plate is constructed as a bottom plate of the box.

[0014] In the battery device provided in the embodiment of the present application, when the battery assembly is assembled in a box, the battery cells and the cross beams are inserted into the accommodating space enclosed by the frame through an opening at one end of the frame, and the liquid cooling plate blocks the opening at one end of the frame to construct the bottom plate of the box. There is no need to set up an additional bottom plate structure of the box, which is beneficial to saving materials and reducing the weight of the battery device.

[0015] In some embodiments, the frame, the battery cells, and the crossbeams are mounted on the same side of the liquid cooling plate, or the frame surrounds and is connected to the outside of the liquid cooling plate.

[0016] In the battery device provided in the embodiment of the present application, the above two connection methods between the frame and the liquid cooling plate can both enable the liquid cooling plate to block the opening at one end of the frame, so that the liquid cooling plate is constructed as the bottom plate of the box.

[0017] In some embodiments, the frame is riveted to the liquid cooling plate.

[0018] The battery device provided in the embodiment of the present application is advantageous in maintaining good connection firmness through riveting, and has good fatigue resistance.

[0019] In some embodiments, the housing further comprises:

[0020] The guard plate is arranged on the side of the liquid cooling plate away from the battery cell and the cross beam.

[0021] The battery device provided in the embodiment of the present application provides protection for the liquid cooling plate by providing a guard plate.

[0022] In some embodiments, the shield is connected to the liquid cooling plate and / or the frame.

[0023] The battery device provided in the embodiment of the present application fixes the guard plate by connecting the guard plate to the liquid cooling plate and / or the frame.

[0024] In some embodiments, the guard plate is connected to the beam.

[0025] The battery device provided in the embodiment of the present application further improves the installation firmness of the guard plate by providing a guard plate connected to the crossbeam.

[0026] In some embodiments, the guard plate and the frame are combined to form a receiving space.

[0027] In the battery device provided in the embodiment of the present application, the guard plate and the frame are connected to form a box body, and the battery assembly is accommodated inside the accommodating space.

[0028] In some embodiments, two opposite ends of the beam are riveted to the frame respectively.

[0029] In the battery device provided in the embodiment of the present application, since the crossbeam, battery cells and liquid cooling plate are integrated into a battery assembly, when the crossbeam is connected to the frame, the distance to the battery cells is relatively close. Compared with the conventional welding method, the riveting method can avoid the adverse effects of welding slag splashing on the battery cells.

[0030] In some embodiments, a seal is disposed between the crossbeam and the frame.

[0031] The battery device provided in the embodiment of the present application improves the sealing effect between the crossbeam and the frame by providing a seal. The battery cell is provided in the space surrounded by the crossbeam and the frame, and the crossbeam and the frame are sealed and connected, which is beneficial to improve the protection of the battery cell.

[0032] In some embodiments, the crossbeam includes an abutting portion and a connecting portion connected to each other; wherein the abutting portion abuts against the battery cell, and the connecting portion is riveted to the frame.

[0033] The battery device provided in the embodiment of the present application is arranged as above, so that the riveted connection between the crossbeam and the frame is facilitated.

[0034] In some embodiments, a notch is provided on the side of the cross beam facing away from the liquid cooling plate, the notch wall facing the battery cell is configured as an abutment portion, and the notch wall facing the frame is configured as a connection portion.

[0035] The battery device provided in the embodiment of the present application sets the crossbeam as a hollow structure by setting the notch, which is beneficial to reducing the weight of the crossbeam. At the same time, by setting the notch, an abutment portion and a connection portion are constructed, which makes processing more convenient.

[0036] In some embodiments, the connecting member includes a first rivet nut and a first rivet bolt, the connecting portion is provided with the first rivet nut, the frame is provided with a connecting hole, the first rivet bolt passes through the connecting hole and is matched with the first rivet nut.

[0037] The battery device provided in the embodiment of the present application completes the riveting of the connecting portion and the frame by matching the first rivet bolt with the first rivet nut, thereby further fixing the crossbeam.

[0038] In some embodiments, a sink groove is provided on the side of the frame facing away from the cross beam, a first rivet bolt is provided at the bottom of the sink groove, and the first rivet bolt is sunk into the sink groove after being matched with the first rivet nut.

[0039] The battery device provided in the embodiment of the present application provides a recessed groove to provide an installation space for the first rivet bolt, so as to prevent the first rivet bolt from protruding from the frame surface. On the one hand, it is helpful to reduce the collision of the first rivet bolt and provide protection; on the other hand, it is also helpful to prevent the first rivet bolt from interfering with other structures in the installation environment.

[0040] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiment, and the battery device is used to provide electrical energy.

[0041] 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, it can be implemented in accordance with the contents of the specification. In order to make the above and 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

[0042] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0043] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0044] Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0045] Figure 3 A schematic diagram of the disassembled structure of a battery assembly provided in some embodiments of the present application;

[0046] Figure 4 A schematic diagram of the assembly structure of a battery assembly provided in some embodiments of the present application;

[0047] Figure 5 A schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application;

[0048] Figure 6 A top view of a battery device provided for some embodiments of the present application;

[0049] Figure 7 for Figure 6 Sectional view at AA in the middle;

[0050] Figure 8 for Figure 7 The enlarged structure diagram at B in the middle;

[0051] Fig. 9 A schematic diagram of the exploded structure of the connection between the crossbeam and the frame provided in some embodiments of the present application;

[0052] Fig.10 A schematic diagram of the assembly structure of the connection between the crossbeam and the frame provided in some embodiments of the present application;

[0053] Fig.11 A schematic diagram of the exploded structure of another battery device provided in some embodiments of the present application.

[0054] The reference numerals in the specific implementation manner are as follows:

[0055] Vehicles 1000;

[0056] Battery device 100, controller 200, motor 300;

[0057] 1. Battery assembly; 11. Liquid cooling plate; 12. Battery cell; 13. Crossbeam; 130. Notch; 131. Abutment portion; 132. Connecting portion; 14. Glue;

[0058] 2. Box body; 20. Opening; 21. Frame; 211. Sink; 212. Connection hole; 22. Guard plate;

[0059] 3. Seals;

[0060] 4. Connecting piece; 41. First rivet nut; 42. First rivet bolt;

[0061] 51. second pull rivet bolt; 52. second pull rivet nut;

[0062] 6. Fasteners. DETAILED DESCRIPTION

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0068] 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).

[0069] 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 element 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.

[0070] 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 elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0071] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0072] Battery devices using CTP module-free technology usually include a box, a liquid cooling plate and several cells. The liquid cooling plate is integrated in the box, and several battery cells are fixed to the liquid cooling plate by gluing. When the liquid cooling plate is pre-fixed to the box, the surface flatness of the connection between the liquid cooling plate and the battery cells is difficult to control due to manufacturing deviations. This may result in a large gap between the local position of the battery cell and the liquid cooling plate. The adhesive material cannot fill the above gap, which will cause the battery cell and the liquid cooling plate to be poorly bonded.

[0073] Based on the above considerations, in order to solve the problem of weak adhesion of battery cells on the liquid cooling plate, the inventor has designed a battery device after in-depth research, which bonds multiple battery cells and a crossbeam that limits the displacement of all battery cells to the liquid cooling plate, so that the three are integrated into a battery assembly, which is installed in the box and connected to the box through the liquid cooling plate. When assembling the battery assembly, the liquid cooling plate is an independent component, and the external tooling can be used to ensure the flatness of the surface where the liquid cooling plate is bonded to the battery cells and the crossbeam, so as to reduce the gap between the battery cells and the liquid cooling plate, so that the applied glue can be evenly filled in the gap between the battery cells and the liquid cooling plate, thereby improving the bonding strength between the battery cells and the liquid cooling plate.

[0074] The battery device disclosed in the embodiments of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships or aircraft. Specifically, the electrical equipment can be, but not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0075] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0076] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. Taking the vehicle 1000 as an example, the electrical equipment may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail 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. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0077] In some embodiments, the battery device 100 can not only serve as an operating power source for the vehicle 1000 , but also serve 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 .

[0078] See also Figure 2~Figure 4 , Figure 2A schematic diagram of the structure of a battery device 100 provided in some embodiments of the present application; Figure 3 A schematic diagram of the disassembled structure of a battery assembly 1 provided in some embodiments of the present application; Figure 4 Schematic diagram of the assembly structure of the battery assembly 1 provided for some embodiments of the present application. The embodiment of the present application provides a battery device 100, the battery device 100 includes a box body 2 and a battery assembly 1, and a storage space is formed in the box body 2. A liquid cooling plate 11, a plurality of battery cells 12 and a crossbeam 13, all the battery cells 12 and the crossbeam 13 used to limit the displacement of all the battery cells 12 are bonded together on the liquid cooling plate 11, and the three are integrated into a battery assembly 1. Among them, the battery assembly 1 is accommodated in the storage space, the liquid cooling plate 11 is connected to the box body 2, and the box body 2 is provided with a connecting hole 212 that passes through the inside and outside of the box body 2, and the connecting member 4 is passed through the connecting hole 212 to connect the box body 2 and the crossbeam 13.

[0079] The battery device 100 provided in the embodiment of the present application is provided by bonding a plurality of battery cells 12 and a crossbeam 13 for limiting the displacement of all battery cells 12 together on a liquid cooling plate 11, so that the liquid cooling plate 11, the battery cells 12 and the crossbeam 13 are integrated into a battery assembly 1, and the battery assembly 1 is installed in the accommodation space of the box body 2, and is connected to the box body 2 through the liquid cooling plate 11 and the crossbeam 13, so as to achieve the fixation of the battery assembly 1 in the box body 2. By providing a connection hole 212 that passes through the inside and outside of the box body 2 on the box body 2, the connection hole 212 can be penetrated from the outside of the box body 2 to connect the crossbeam 13 and the box body 2, so as to solve the problem that the liquid cooling plate 11, the battery cells 12 and the crossbeam 13 are integrated and placed as a whole in the box body 2, and it is inconvenient to fix the crossbeam 13. When the battery assembly 1 is assembled, the liquid cooling plate 11 is an independent component, and external tooling can be used to ensure the flatness of the surface where the liquid cooling plate 11 is bonded to the battery cell 12 and the cross beam 13, so as to reduce the gap between the battery cell 12 and the liquid cooling plate 11, so that the glue can evenly fill the gap between the battery cell 12 and the liquid cooling plate 11, thereby improving the bonding strength between the battery cell 12 and the liquid cooling plate 11.

[0080] For example, Figure 3 As shown, adhesive material 14 is applied to the surface of the liquid cooling plate 11 facing the battery cell 12 and the cross beam 13 to bond the battery cell 12 and the cross beam 13 to the liquid cooling plate 11. The adhesive material 14 can be a structural adhesive with good thermal conductivity to enable rapid heat exchange between the battery cell 12 and the liquid cooling plate 11.

[0081] Alternatively, if Figure 3 and Figure 4 As shown, two cross beams 13 are provided, and the two cross beams 13 are respectively provided at two ends of the battery cells 12 in the stacking direction to form a displacement limit for all the battery cells 12 .

[0082] In some embodiments, in combination Figure 2 and Figure 5 As shown, Figure 5 Schematic diagram of the exploded structure of the battery device 100 provided in some embodiments of the present application. The box 2 includes a frame 21, and the frame 21 surrounds the battery cell 12 and the beam 13, and the opposite ends of the beam 13 are respectively connected to the frame 21. The connection between the battery assembly 1 and the box 2 is achieved by connecting the opposite ends of the beam 13 to the frame 21. At the same time, on the basis of the beam 13 being bonded to the liquid cooling plate 11, the beam 13 is further fixed by connecting the beam 13 to the frame 21, so that the beam 13 provides a stable abutment force to the battery cell 12.

[0083] In some embodiments, the frame 21 encloses a receiving space, and the liquid cooling plate 11 is constructed as the bottom plate of the box body 2. When the battery assembly 1 is assembled in the box body 2, the battery cell 12 and the crossbeam 13 are inserted into the receiving space enclosed by the frame 21 through an opening at one end of the frame 21, and the liquid cooling plate 11 blocks the opening at one end of the frame 21 to construct the bottom plate of the box body 2, and there is no need to set up an additional bottom plate structure of the box body 2, which is conducive to saving materials and reducing the weight of the battery device 100.

[0084] Specifically, in order to make the liquid cooling plate 11 be configured as the bottom plate of the box body 2, the frame 21, the battery cell 12 and the crossbeam 13 are installed on the same side of the liquid cooling plate 11, or the frame 21 is surrounded and connected to the outside of the liquid cooling plate 11. The above two connection methods of the frame 21 and the liquid cooling plate 11 can make the liquid cooling plate 11 block the opening of one end of the frame 21, so that the liquid cooling plate 11 is configured as the bottom plate of the box body 2.

[0085] In the present application embodiment, Figure 5 As shown, the frame 21, the battery cell 12 and the crossbeam 13 are installed on the same side of the liquid cooling plate 11. The size of the liquid cooling plate 11 is not less than the outer peripheral size of the frame 21, so that the frame 21 can be fully supported on the liquid cooling plate 11.

[0086] In some other embodiments, the frame 21 surrounds and is connected to the outer side of the liquid cooling plate 11. In this case, the shape of the liquid cooling plate 11 matches the inner circle size of the frame 21, so that the frame 21 can be sleeved on the outer side of the liquid cooling plate 11.

[0087] Optionally, the frame 21 is riveted to the liquid cooling plate 11. The riveted connection is firm and has good fatigue resistance. By providing a plurality of second rivets along the frame 21, it is more conducive to improving the firmness of the connection between the frame 21 and the liquid cooling plate 11.

[0088] Furthermore, the cross beam 13 and the liquid cooling plate 11 are also configured to be riveted to each other. On the basis of the cross beam 13 and the liquid cooling plate 11 being bonded, the cross beam 13 and the liquid cooling plate 11 are further connected and fixed to improve the connection firmness.

[0089] Specifically, see Figure 6~Figure 8 , Figure 6 A top view of a battery device 100 provided in some embodiments of the present application; Figure 7 for Figure 6 Sectional view at AA in the middle; Figure 8 for Figure 7 The second rivet member includes a second rivet bolt 51 and a second rivet nut 52, wherein the second rivet nut 52 is pre-connected to the frame 21 or the crossbeam 13, and when the battery assembly 1 is assembled with the frame 21, the second rivet bolt 51 and the second rivet nut 52 can be matched.

[0090] Please continue reading Figure 6~Figure 8 The opposite ends of the cross beam 13 are riveted to the frame 21. Since the cross beam 13, the battery cell 12 and the liquid cooling plate 11 are integrated into the battery assembly 1, when the cross beam 13 is connected to the frame 21, the distance to the battery cell 12 is relatively close. Compared with the conventional welding method, the riveting method can avoid the adverse effect of welding slag splashing on the battery cell 12.

[0091] See also Fig. 9 , Fig. 9 Schematic diagram of the exploded structure of the connection between the cross beam 13 and the frame 21 provided in some embodiments of the present application. In some embodiments, a seal 3 is sandwiched between the cross beam 13 and the frame 21. By providing the seal 3, the sealing effect between the cross beam 13 and the frame 21 is improved. The battery cell 12 is arranged in the space enclosed by the cross beam 13 and the frame 21, and the cross beam 13 is sealed and connected to the frame 21, which is conducive to improving the protection of the battery cell 12.

[0092] Optionally, the cross beam 13 includes an abutting portion 131 and a connecting portion 132 connected to each other, wherein the abutting portion 131 abuts against the battery cell 12, and the connecting portion 132 is riveted to the frame 21. In this way, the cross beam 13 is conveniently riveted to the frame 21.

[0093] Specifically, a notch 130 is provided on the side of the cross beam 13 facing away from the liquid cooling plate 11, the groove wall of the notch 130 facing the battery cell 12 is configured as an abutment portion 131, and the groove wall of the notch 130 facing the frame 21 is configured as a connection portion 132. By setting as above, the cross beam 13 is set as a hollow structure, which is conducive to reducing the weight of the cross beam 13, and by setting the notch 130, the abutment portion 131 and the connection portion 132 are constructed, which is more convenient for processing.

[0094] The crossbeam 13 with the notch 130 can be formed by extrusion. During the extrusion process, the notch 130 can be formed, the process efficiency is relatively high, and materials can be saved.

[0095] Please continue reading Fig. 9 The cross beam 13 and the frame 21 are connected by a connecting member 4. Specifically, the connecting member 4 includes a first rivet nut 41 and a first rivet bolt 42. The connecting portion 132 is provided with the first rivet nut 41, and the frame 21 is provided with the aforementioned connecting hole 212. The first rivet bolt 42 penetrates the connecting hole 212 and is matched with the first rivet nut 41 to complete the riveting of the connecting portion 132 and the frame 21, thereby further fixing the cross beam 13.

[0096] Before assembling the battery device 100, the first rivet nut 41 is pre-installed on the crossbeam 13. After the battery assembly 1 is assembled, it is assembled with the frame 21. During assembly, a seal 3 is provided between the crossbeam 13 and the frame 21, and then the first rivet bolt 42 is passed through the frame 21 and the seal 3 from the outside of the frame 21 to connect with the first rivet nut 41.

[0097] Optionally, a plurality of first rivet nuts 41 are provided on the crossbeam 13 along its height direction, and a plurality of first rivet bolts 42 are provided correspondingly, so as to improve the firmness of the connection between the crossbeam 13 and the frame 21. In the embodiment of the present application, four first rivet nuts 41 and four first rivet bolts 42 are provided correspondingly. It is understandable that the number of the first rivet nuts 41 and the first rivet bolts 42 is not limited thereto, and can be specifically provided according to the size of the crossbeam 13 in actual working conditions.

[0098] See also Fig.10 , Fig.10 Schematic diagram of the assembly structure of the connection between the crossbeam 13 and the frame 21 provided in some embodiments of the present application. In some embodiments, a sink groove 211 is provided on the side of the frame 21 away from the crossbeam 13, and a first rivet bolt 42 is provided at the bottom of the sink groove 211, and the first rivet bolt 42 is sunk into the sink groove 211 after being matched with the first rivet nut 41. By providing the sink groove 211, an installation space is provided for the first rivet bolt 42 to prevent the first rivet bolt 42 from protruding from the surface of the frame 21. On the one hand, it is beneficial to reduce the collision with the first rivet bolt 42 and form protection; on the other hand, it is also beneficial to prevent the first rivet bolt 42 from interfering with other structures in the installation environment.

[0099] See also Fig.11 , Fig.11The schematic diagram of the exploded structure of another battery device 100 provided in some embodiments of the present application. The box body 2 also includes a protective plate 22, which is arranged on the side of the liquid cooling plate 11 away from the battery cell 12 and the cross beam 13. The protective plate 22 is provided to protect the liquid cooling plate 11.

[0100] Optionally, the guard plate 22 is connected to the liquid cooling plate 11 and / or the frame 21 to fix the guard plate 22 .

[0101] In the embodiment of the present application, the frame 21 is connected to the side of the liquid cooling plate 11 where the battery cells 12 are arranged, and the guard plate 22 is connected to the liquid cooling plate 11 and the frame 21 through a plurality of fasteners 6. The fasteners 6 connect the guard plate 22, the liquid cooling plate 11 and the frame 21 as a whole, so that the battery device 100 has a relatively strong structure. The fasteners 6 can be bolts, screws or rivet bolts.

[0102] In some other embodiments, the frame 21 is disposed around the outside of the liquid cooling plate 11 , the guard plate 22 is in direct contact with the bottom of the frame 21 , and the guard plate 22 and the frame 21 can be directly connected by a plurality of fasteners 6 .

[0103] In this case, the guard plate 22 and the frame 21 are enclosed to form a receiving space, and the guard plate 22 and the frame 21 are connected to form a box body 2, and the battery assembly 1 is accommodated inside the receiving space.

[0104] Of course, in some other embodiments, the guard plate 22 may be simply connected to the liquid cooling plate 11 , which can also play a role in fixing the guard plate 22 .

[0105] In order to improve the fixing effect of the guard plate 22, the guard plate 22 is also connected to the cross beam 13 to further improve the installation firmness of the guard plate 22. Specifically, the guard plate 22 and the cross beam 13 are also connected by a plurality of fasteners 6.

[0106] The battery device 100 provided in the embodiment of the present application includes a box body 2 and a battery assembly 1, and the box body 2 includes a frame 21 and a guard plate 22, and the frame 21 and the guard plate 22 enclose a receiving space. All battery cells 12 and the crossbeam 13 used to limit the displacement of all battery cells 12 are bonded together on the liquid cooling plate 11, and the three are integrated into a battery assembly 1. Among them, the battery assembly 1 is accommodated in the receiving space, and is connected to the box body 2 through the liquid cooling plate 11, and the crossbeam 13 is connected to the frame 21. When the battery device 100 is assembled, all battery cells 12 and the crossbeam 13 are bonded together on the liquid cooling plate 11, and the three are integrated into a battery assembly 1; then the frame 21 is placed on the liquid cooling plate 11, surrounding the battery cells 12 and the crossbeam 13, the liquid cooling plate 11 is connected to the frame 21, and the crossbeam 13 and the frame 21 are connected. Finally, the guard plate 22 is connected to the bottom side of the liquid cooling plate 11, and the assembly of the battery device 100 is completed.

[0107] The battery device 100 provided in the embodiment of the present application is formed by bonding a plurality of battery cells 12 and a crossbeam 13 for limiting the displacement of all battery cells 12 to a liquid cooling plate 11, so that the liquid cooling plate 11, the battery cells 12 and the crossbeam 13 are integrated into a battery assembly 1. The battery assembly 1 is installed in the accommodating space of the box body 2 and connected to the box body 2 through the liquid cooling plate 11, so that the battery assembly 1 is fixed in the box body 2. When the battery assembly 1 is assembled, the liquid cooling plate 11 is an independent component, and the external tooling can be used to ensure the flatness of the surface where the liquid cooling plate 11 is bonded to the battery cells 12 and the crossbeam 13, so as to reduce the gap between the battery cells 12 and the liquid cooling plate 11, so that the glue material 14 can evenly fill the gap between the battery cells 12 and the liquid cooling plate 11, thereby improving the bonding firmness between the battery cells 12 and the liquid cooling plate 11.

[0108] The embodiment of the present application further provides an electrical device, including the battery device 100 in the above embodiment, and the battery device 100 is used to provide electrical energy.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: A box body (2) having a receiving space formed therein; A liquid cooling plate (11), a plurality of battery cells (12) and a crossbeam (13), wherein all of the battery cells (12) and the crossbeam (13) for limiting the displacement of all of the battery cells (12) are bonded together on the liquid cooling plate (11), and the three are integrated into a battery assembly (1); The battery assembly (1) is accommodated in the accommodation space, the liquid cooling plate (11) is connected to the box body (2), and the box body (2) is provided with a connection hole (212) that passes through the inside and outside of the box body (2), and a connecting member (4) is passed through the connection hole (212) to connect the box body (2) and the crossbeam (13).

2. The battery device according to claim 1, characterized in that: The box (2) comprises: A frame (21), the frame (21) enclosing the battery cell (12) and the crossbeam (13); opposite ends of the crossbeam (13) are respectively connected to the frame (21).

3. The battery device according to claim 2, characterized in that: The frame (21) encloses and forms the accommodating space, and the liquid cooling plate (11) is constructed as a bottom plate of the box body (2).

4. The battery device according to claim 3, characterized in that: The frame (21) is installed on the same side of the liquid cooling plate (11) as the battery cell (12) and the crossbeam (13), or the frame (21) surrounds and is connected to the outside of the liquid cooling plate (11).

5. The battery device according to claim 4, characterized in that: The frame (21) is riveted to the liquid cooling plate (11).

6. The battery device according to claim 4, characterized in that: The box (2) also includes: A guard plate (22), the guard plate (22) being arranged on a side of the liquid cooling plate (11) facing away from the battery cell (12) and the crossbeam (13).

7. The battery device according to claim 6, characterized in that: The guard plate (22) is connected to the liquid cooling plate (11) and / or the frame (21).

8. The battery device according to claim 7, characterized in that: The guard plate (22) is connected to the crossbeam (13).

9. The battery device according to claim 6, characterized in that: The guard plate (22) and the frame (21) enclose the accommodating space.

10. The battery device according to any one of claims 2 to 9, characterized in that: The opposite ends of the crossbeam (13) are riveted to the frame (21) respectively.

11. The battery device according to claim 10, characterized in that: A sealing member (3) is sandwiched between the crossbeam (13) and the frame (21).

12. The battery device according to claim 10, characterized in that: The crossbeam (13) comprises an abutting portion (131) and a connecting portion (132) which are connected to each other; wherein the abutting portion (131) abuts against the battery cell (12), and the connecting portion (132) is riveted to the frame (21).

13. The battery device according to claim 12, characterized in that: A notch (130) is provided on the side of the crossbeam (13) facing away from the liquid cooling plate (11); the notch wall of the notch (130) facing the battery cell (12) is configured as the abutment portion (131); and the notch wall of the notch (130) facing the frame (21) is configured as the connection portion (132).

14. The battery device according to claim 12, characterized in that: The connecting member (4) comprises a first rivet nut (41) and a first rivet bolt (42); the connecting portion (132) is provided with the first rivet nut (41); the frame (21) is provided with the connecting hole (212); the first rivet bolt (42) penetrates the connecting hole (212) and is matched with the first rivet nut (41).

15. The battery device according to claim 14, characterized in that: A sink groove (211) is provided on the side of the frame (21) facing away from the crossbeam (13), the bottom of the sink groove (211) is provided with the first rivet bolt (42), and the first rivet bolt (42) is sunk into the sink groove (211) after being matched with the first rivet nut (41).

16. An electrical equipment, characterized in that: Comprising a battery device as described in any one of claims 1 to 15, wherein the battery device is used to provide electrical energy.

Images