Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, and in the battery device, a signal transmission assembly is electrically connected with a battery monomer, so that internal circuit connection of the battery device is realized. The first flexible part in the signal transmission assembly is arranged on the surface, facing or backing on to the battery monomers, of the box girder, so that the connecting part between the first flexible part and the transmission wire harness is transferred to the side surface of the box girder, and the space occupation of the top of the box girder is reduced. Through the design, the utilization rate of the internal space is improved, and the energy density of the battery device 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] With the rapid development of the new energy industry, under the constraints of limited space and weight, improving the energy density and space utilization of battery devices has become the core technical path to break through the bottleneck of battery life. In the integrated design of battery devices, flexible printed circuits (FPC) are usually used for circuit connection. However, due to the limitations of the connection structure design in traditional battery devices, the internal space utilization of the battery device is reduced, which affects the improvement of the energy density of the battery device. Utility Model Content

[0003] Based on this, it is necessary to provide a battery device and electrical equipment to improve the utilization rate of the internal space, which is conducive to improving the energy density of the battery device.

[0004] In the first aspect, the present application provides a battery device, which includes: a box body; a battery cell, which is accommodated in the box body, and the box body includes a box beam located on one side of the battery cell; a signal transmission component, including a transmission harness, a flexible circuit board and a connecting seat, and the flexible circuit board is connected to the battery cell; wherein the flexible circuit board includes a first flexible portion, and the first flexible portion is arranged on the surface of the box beam facing toward or facing away from the battery cell, the transmission harness is electrically connected to the connecting seat, and the connecting seat is arranged on the side of the first flexible portion facing away from the box beam.

[0005] The battery device described above utilizes a signal transmission component to electrically connect to the battery cell to achieve internal circuit connection of the battery device. Since the first flexible portion in the signal transmission component is disposed on the surface of the box beam facing toward or away from the battery cell, the connection portion between the first flexible portion and the transmission harness is transferred to the side of the box beam, thereby reducing the space occupied at the top of the box beam. Such a design is conducive to improving the utilization rate of the internal space and the energy density of the battery device.

[0006] In some embodiments, the signal transmission assembly further includes a protective member, which covers the side of the first flexible portion facing away from the box beam and avoids the connection seat. In this design, the protective member is introduced to protect the portion of the first flexible portion exposed outside the connection seat, thereby reducing wear or corrosion on the first flexible portion, which is conducive to improving the stability of the structure.

[0007] In some embodiments, the connection base has a socket for plugging in a transmission wire harness. The orientation of the socket intersects with the thickness direction of the box girder, and the protective member is located on one side of the connection base facing away from and / or towards the socket. With such a design, the socket is introduced to facilitate the quick connection of the transmission wire harness and improve the assembly efficiency of the battery device. At the same time, by designing the orientation of the socket to intersect with the thickness direction, the space occupied on one side of the box girder along its own thickness direction can be reduced, making the structure more compact and conducive to improving space utilization.

[0008] In some embodiments, the orientation of the socket is consistent with the length direction of the box girder. With such a design, it is convenient for the connection between the transmission wire harness and the connection base. At the same time, it also makes the transmission wire harness adhere to the box girder, reducing the space occupied.

[0009] In some embodiments, the battery device further includes a support member. The support member is connected to the box girder, and the first flexible part and the connection base are stacked on one side of the support member facing away from the box girder. With such a design, the support member is introduced to facilitate the fixed installation of the first flexible part and the connection base on one side of the box girder respectively.

[0010] In some embodiments, the flexible circuit board further includes a second flexible part electrically connected to the first flexible part. The second flexible part is located on one side of the top of the box girder along its own height direction and is electrically connected to the battery cell. With such a design, by placing the second flexible part at the top of the box girder, it is convenient for the second flexible part to be electrically connected to the battery cell and for the connection between the flexible circuit board and the battery cell.

[0011] In some embodiments, a gap is formed between the second flexible part and the top of the box girder along its own height direction. With such a design, the gap is introduced to facilitate the deformation of the second flexible part towards the gap side when the first flexible part is stretched, achieving effective buffering and reducing the risk of the flexible circuit board being broken.

[0012] In some embodiments, the surface of the box girder facing away from the battery cell includes a mounting surface. The mounting surface is inclined relative to the height direction of the box girder, and the end of the mounting surface close to the top of the box girder is closer to the battery cell. The first flexible part is disposed on the mounting surface. With such a design, the inclined mounting surface is introduced, which not only helps to reduce the space occupied by the battery cell, but also facilitates the fixed operation of the flexible circuit board and the transmission wire harness on the box girder respectively.

[0013] In some embodiments, the angle between the mounting surface and the height direction of the box girder is denoted as θ, where 0° < θ ≤ 5°. With such a design, by controlling the angle between 0° and 5°, while satisfying the installation convenience of the flexible circuit board and the transmission wire harness, the size of the bottom of the box girder is controlled to reduce the space occupied on the side of the box girder facing away from the battery cell.

[0014] In some embodiments, the box body further includes a first part. The box girder is disposed inside the first part and divides the interior of the first part into a first chamber and a second chamber. The battery cells are received in the first chamber, and the first flexible part is disposed on the surface of the box girder facing the second chamber. With such a design, the box girder divides the interior of the first part into the first chamber and the second chamber, facilitating the orderly arrangement of the battery cells and the electrical system.

[0015] In some embodiments, the box body further includes a second part. The second part covers the first part, and the surface of the second part facing away from the second chamber is recessed in the direction towards the second chamber to form a pit. With such a design, the first flexible part is arranged on the side of the box girder, reducing the space occupied by the second chamber in the height direction, making it easier for the pit to be recessed, providing more space for the outer surface of the battery device, thus facilitating the increase of the space inside the vehicle and being beneficial to improving the riding experience.

[0016] In some embodiments, the transmission wire harness is plugged into the connection socket. With such a design, it is convenient for the transmission wire harness and the connection socket to be quickly electrically connected.

[0017] In a second aspect, the present application provides an electrical device, which includes the battery device according to any one of the above. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a vehicle provided by some embodiments of the present application.

[0019] Figure 2 It is a schematic structural diagram of a battery device provided by some embodiments of the present application.

[0020] Figure 3 It is a schematic internal structural diagram of a battery device provided by some embodiments of the present application.

[0021] Figure 4 It is a schematic internal structural diagram of a box body provided by some embodiments of the present application.

[0022] Figure 5 It is Figure 4 The enlarged structural diagram of the structure at circle A in

[0023] Figure 6 It is Figure 4 The enlarged structural diagram of the structure at circle B in

[0024] Figure 7 It is a schematic structural diagram of a flexible circuit board on a box girder provided by some embodiments of the present application.

[0025] 1000, Vehicle; 100, Battery device; 200, Controller; 300, Motor; 10, Box body; 111, First part; 112, Second part; 12, Box girder; 121, Top; 122, Mounting surface; 13, First chamber; 14, Second chamber; 15, Pit; 30, Signal transmission component; 31, Transmission wire harness; 311, Wire plug; 32, Flexible circuit board; 321, First flexible part; 322, Second flexible part; 33, Connection seat; 331, Socket; 34, Gap; 40, Protective part; 50, Fastener; 60, Support part; X, Height direction; Y, Length direction; Z, Thickness direction. Detailed implementation manner

[0026] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manner of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0028] In addition, if these terms "first" and "second" appear, these terms are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0029] In this application, unless otherwise clearly specified or limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In this application, unless otherwise clearly specified or limited, if there is a description such as the first feature being "on" or "under" the second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or just means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or just means that the first feature has a lower horizontal height than the second feature.

[0031] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0032] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as many fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also constantly increasing.

[0033] In a battery device, battery cells usually adopt flexible circuit boards and transmission wire harnesses of a battery management system to achieve the circuit connection of the battery cells. The traditional flexible circuit board is usually disposed above the box girder, occupying a large amount of space in the height direction, restricting the distribution of the battery cells in the height direction, and thus affecting the improvement of the energy density of the battery device.

[0034] Based on this, in view of the problem of reduced space utilization rate in traditional battery devices, the present application provides a battery device, which uses a signal transmission component to be electrically connected to battery cells to achieve internal circuit connection of the battery device. Since the first flexible part in the signal transmission component is arranged on the surface of the box girder facing or facing away from the battery cells, the connection part between the first flexible part and the transmission wire harness is transferred to the side surface of the box girder, reducing the space occupation on the top of the box girder. Such a design is beneficial to improving the utilization rate of the internal space and is beneficial to enhancing the energy density of the battery device.

[0035] The battery cells disclosed in the embodiments of the present application can be but are not limited to being used in power-consuming devices such as vehicles, ships, or aircraft. A power supply system of the power-consuming device can be formed by using the battery cells, battery devices, etc. disclosed in the present application.

[0036] The embodiments of the present application provide a power-consuming device using a battery device as a power source. The power-consuming device can be but is not limited to a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, and a spaceship, etc.

[0037] For the convenience of description in the following embodiments, a power-consuming device of an embodiment of the present application is taken as an example of a vehicle 1000 for illustration.

[0038] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 100 is arranged inside the vehicle 1000. The battery device 100 can be arranged at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power consumption requirements during the start, navigation, and driving of the vehicle 1000.

[0039] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0040] Please refer to Figure 2 , Figure 2Schematic diagram of the structure of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes a box body 10 and battery cells, and the battery cells are accommodated in the box body 10. Among them, the box body 10 is used to provide an accommodation space for the battery cells, and the box body 10 can adopt various structures. In some embodiments, the box body 10 may include a first part 111 and a second part 112, the first part 111 and the second part 112 are covered with each other, and the first part 111 and the second part 112 jointly define an accommodation space for accommodating the battery cells. The first part 111 may be a hollow structure with one end open, the second part 112 may be a plate-like structure, and the second part 112 covers the open side of the first part 111 so that the first part 111 and the second part 112 jointly define an accommodation space; the first part 111 and the second part 112 may also both be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box body 10 formed by the first part 111 and the second part 112 may be of various shapes, such as a cylinder, a cuboid, etc.

[0041] In the battery device 100, there may be multiple battery cells, and the multiple battery cells may be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells. The multiple battery cells may be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells is accommodated in the box body 10; of course, the battery device 100 may also be that multiple battery cells are first connected in series, in parallel, or in a mixed connection to form a battery module form, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the box body 10. The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component for realizing the electrical connection between the multiple battery cells.

[0042] Among them, each battery cell may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but not limited thereto. The battery cell may be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0043] According to some embodiments of the present application, please refer to Figure 3 The present application provides a battery device 100, and the battery device 100 includes: a box body 10, battery cells, and a signal transmission component 30. The battery cells are housed in the box body 10, and the box body 10 includes a box girder 12 on one side of the battery cells. The signal transmission component 30 includes a transmission wire harness 31, a flexible circuit board 32, and a connection seat 33. The flexible circuit board 32 is connected to the battery cells; wherein, the flexible circuit board 32 includes a first flexible part 321, and the first flexible part 321 is arranged on the surface of the box girder 12 facing or facing away from the battery cells. The transmission wire harness 31 is electrically connected to the connection seat 33, and the connection seat 33 is arranged on the side of the first flexible part 321 facing away from the box girder 12.

[0044] The box body 10 refers to a structure that provides a closed space for the battery cell, and its shape can be designed in various ways, such as: a cylinder, a cuboid, etc. The box beam 12 refers to the beam structure of the box body 10, which can be located inside the box body 10 or outside the box body 10. When the box beam 12 is located inside the box body 10, the first flexible portion 321 can be arranged on the surface of the box beam 12 facing away from or toward the battery cell, for example: the box beam 12 can be an expansion beam structure inside the box body 10. When the box beam 12 is located outside the box body 10, the first flexible portion 321 can be arranged on the surface of the box beam 12 facing the battery cell, for example: the box beam 12 can be a part of the frame.

[0045] The transmission harness 31 refers to the connection harness in the battery management system, which can be electrically connected to the battery cell through the flexible circuit board 32, so that the battery management system and the battery cell can achieve communication connection. The flexible circuit board 32 refers to a circuit board with flexible function connected between the battery cell and the transmission harness 31.

[0046] The first flexible portion 321 of the flexible circuit board 32 may be arranged on the surface of the box beam 12 facing the battery cell, or may be arranged on the surface of the box beam 12 facing away from the battery cell. When the first flexible portion 321 is arranged on the surface of the box beam 12 facing away from the battery cell, the space occupied by the flexible circuit board 32 on the top 121 of the box beam 12 may be reduced. At the same time, in order to facilitate the electrical connection between the transmission harness 31 and the first flexible portion 321, at least part of the transmission harness 31 may be located on the side of the box beam 12 facing away from the battery cell.

[0047] For some specific examples, please refer to Figure 3 The first flexible portion 321 is arranged on the surface of the box beam 12 facing away from the battery cell, the connecting seat 33 is arranged on the surface of the first flexible portion 321 facing away from the box beam 12, and the transmission harness 31 is located on the surface of the box beam 12 facing away from the battery cell, and can be directly electrically connected to the connecting seat 33, which can reduce the space occupied by the battery cell; at the same time, the transmission harness 31 is directly electrically connected to the connecting seat 33, while ensuring effective electrical connection, reducing the number of connection structures between the transmission harness 31 and the connecting seat 33, such as: adapter circuit board, etc., thereby reducing the space occupied on one side of the box beam 12.

[0048] Optionally, there are various ways to connect the first flexible portion 321 to the box beam 12, such as but not limited to bolt connection, clamping, riveting, welding, bonding, etc.

[0049] It should also be noted that the connection base 33 refers to a joint structure that realizes the electrical connection between the first flexible part 321 and the transmission wire harness 31, and it can be designed as a plug or a socket 331, etc. The direct electrical connection between the connection base 33 and the transmission wire harness 31 should be understood as: the structures in the connection base 33 and the transmission wire harness 31 are directly connected, and there is no intermediate structure between them. For example, there is no structure such as a transfer circuit board between the connection base 33 and the transmission wire harness 31. Among them, the connection method between the connection base 33 and the transmission wire harness 31 can be, but is not limited to, plugging, welding, etc. It is not difficult to understand that the connection between the connection base 33 and the transmission wire harness 31 can realize the communication between the battery cell and the transmission wire harness 31, so as to realize the information collection and control of the battery cell. For example, the real-time control of parameters such as the voltage and temperature of the battery cell. As for the specific circuit design between the connection base 33 and the transmission wire harness 31, it can be determined according to the functions to be realized actually, and will not be introduced in detail here.

[0050] With such a design, the connection part between the first flexible part 321 and the transmission wire harness 31 is transferred to the side surface of the box girder 12, reducing the space occupation of the top 121 of the box girder 12. This is beneficial to improving the utilization rate of the internal space and the energy density of the battery device 100.

[0051] In some embodiments of the present application, optionally, please refer to Figure 4 and Figure 5 , the signal transmission component 30 further includes a protection member 40, and the protection member 40 covers the side of the first flexible part 321 facing away from the box girder 12 and avoids the connection base 33.

[0052] The protection member 40 refers to a structure that protects the part of the first flexible part 321 exposed outside the connection base 33. There are various choices for its material. For example, it can be a coating, or it can be foam or cloth-based tape, etc. When the protection member 40 is a foam tape, the characteristics of the foam can be relied on to effectively absorb external impacts or vibrations.

[0053] In addition, if the protection member 40 is an insulating material, it can play a role in insulation and short-circuit prevention to a certain extent, so that the battery device 100 can be stably used and operated.

[0054] With such a design, the protection member 40 is introduced to protect the part of the first flexible part 321 exposed outside the connection base 33, reducing the wear or corrosion of the first flexible part 321, which is beneficial to improving the structural stability.

[0055] In some embodiments of the present application, optionally, please refer to Figure 5 and Figure 6 , the connection base 33 has a socket 331 for the transmission wire harness 31 to be plugged in, the orientation of the socket 331 intersects with the thickness direction Z of the box girder 12, and the protection member 40 is located on the side of the connection base 33 facing away from and / or facing the socket 331.

[0056] The socket 331 refers to the connection end of the connection base 33. When the transmission wire harness 31 is inserted into the socket 331, the electrical connection between the connection base 33 and the transmission wire harness 31 can be realized. The orientation of the socket 331 intersects with the thickness direction Z of the box girder 12, indicating that the orientation of the socket 331 can be along the length direction Y of the box girder 12 or the height direction X of the box girder 12; or, the orientation of the socket 331 is any direction between the length direction Y and the height direction X. Among them, the thickness direction Z of the box girder 12 can be understood as: the direction from the side of the box girder 12 facing away from the battery cell to the side of the box girder 12 facing the battery cell.

[0057] There can be various positional relationships between the protective member 40 and the socket 331. For example: the socket 331 and the protective member 40 are on the same side of the connection base 33; or, the socket 331 and the protective member 40 are on opposite sides of the connection base 33 respectively; or, protective members 40 are provided on both opposite sides of the connection base 33. At this time, it indicates that the connection base 33 is located in the middle part of the first flexible part 321.

[0058] When the socket 331 and the protective member 40 are on the same side of the connection base 33, after the transmission wire harness 31 is inserted into the socket 331, the transmission wire harness 31 contacts the protective member 40. In this way, the friction between the transmission wire harness 31 and the first flexible part 321 can be reduced, thereby reducing the wear or damage of the transmission wire harness 31 caused by uneven force during the plugging and unplugging process, effectively reducing the impact on the flexible circuit board 32 during the installation operation process, extending the service life, reducing the maintenance cost, and enhancing the reliability and durability. At the same time, the material of the protective member 40 can have different selections according to the different distribution positions. For example: when the protective member 40 and the socket 331 are on the same side, the material of the protective member 40 can be selected as a wear-resistant material, such as: cloth-based tape. When the protective member 40 and the socket 331 are distributed on different sides, the protective member 40 can be selected as foam, and of course, cloth-based tape can also be selected.

[0059] In addition, to achieve plugging, the transmission wire harness 31 includes a wire plug 311 inserted into the socket 331. Among them, the number of the wire plug 311, the connection base 33, and the protective member 40 can all be one or multiple. When the number of the wire plug 311, the connection base 33, and the protective member 40 are all multiple, each protective member 40 can be on the side of the connection base 33 facing or facing away from the corresponding socket 331; or, a part of the protective members 40 and their corresponding sockets 331 are on the same side of the connection base 33, and another part of the protective members 40 and their corresponding sockets 331 are on different sides of the connection base 33.

[0060] With such a design, the socket 331 is introduced to facilitate the quick connection of the transmission wire harness 31, improving the assembly efficiency of the battery device 100. At the same time, by designing the orientation of the socket 331 to intersect with the thickness direction Z, the space occupied on one side of the box girder 12 along its own thickness direction Z can be reduced, making the structure more compact and conducive to improving space utilization.

[0061] In some embodiments of the present application, optionally, please refer to Figure 4 and Figure 5 , the orientation of the socket 331 is consistent with the length direction Y of the box girder 12.

[0062] The orientation of the socket 331 being consistent with the length direction Y of the box girder 12 indicates that the insertion direction of the socket 331 is the same as the length direction Y of the box girder 12. In this way, when making an electrical connection, the transmission wire harness 31 can be inserted into the connection seat 33 along the length direction Y of the box girder 12. This is not only convenient for connection but also makes the transmission wire harness 31 adhere to the box girder 12, reducing the occupied space.

[0063] With such a design, it is convenient for the connection between the transmission wire harness 31 and the connection seat 33. At the same time, it also makes the transmission wire harness 31 adhere to the box girder 12, reducing the occupied space.

[0064] In some embodiments of the present application, optionally, please refer to Figure 5 , the battery device 100 further includes a support member 60. The support member 60 is connected to the box girder 12, and the first flexible portion 321 and the connection seat 33 are stacked on the side of the support member 60 facing away from the box girder 12.

[0065] It can be seen that by using the support member 60, the first flexible portion 321 and the connection seat 33 are sequentially stacked on one side of the box girder 12, facilitating the fixed installation of the signal transmission assembly 30 on one side of the box girder 12. To facilitate the stacking of the first flexible portion 321 and the connection seat 33, the support member 60 can be designed as a plate-like structure that fits on one side of the box girder 12. At the same time, there are various ways to fix the support member 60 on the box girder 12, such as: it can be, but is not limited to, bolt connection, snap connection, riveting, welding, bonding, etc.

[0066] With such a design, the support member 60 is introduced to facilitate the fixed installation of the first flexible portion 321 and the connection seat 33 on one side of the box girder 12 respectively.

[0067] In some embodiments of the present application, optionally, please refer to Figure 5 , the battery device 100 further includes a fastener 50. The fastener 50 is used to fix the support member 60 to the box girder 12.

[0068] The fastener 50 refers to a component that fixes the support member 60 to the box girder 12, which can be but is not limited to bolts, pins, rivets, etc. The number of fasteners 50 can be one or multiple. When the number of fasteners 50 is multiple, at least two fasteners 50 are respectively located on opposite sides of the connecting seat 33.

[0069] With such a design, the introduction of the fastener 50 enables the support member 60 to be stably fixed to the side of the box girder 12, reducing the impact of vibration and shock on the flexible circuit board 32 and enhancing the stability of the overall structure.

[0070] In some embodiments of the present application, optionally, please refer to Figure 5 , the flexible circuit board 32 further includes a second flexible portion 322 electrically connected to the first flexible portion 321. The second flexible portion 322 is located on one side of the top 121 of the box girder 12 along its height direction X and is electrically connected to the battery cell.

[0071] It can be seen that the first flexible portion 321 is bent relative to the second flexible portion 322, so that a part of the flexible circuit board 32 is bent from the top 121 of the box girder 12 to the side of the box girder 12. The first flexible portion 321 and the second flexible portion 322 can be combined by means of welding, clamping, riveting, bolt connection, etc.; they can also be designed as an integral structure.

[0072] At the same time, the second flexible portion 322 can be attached to the top 121 of the box girder 12; or there can be a certain gap between the second flexible portion 322 and the top 121 of the box girder 12.

[0073] With such a design, placing the second flexible portion 322 at the top 121 of the box girder 12 facilitates the electrical connection between the second flexible portion 322 and the battery cell and makes it convenient to connect the flexible circuit board 32 and the battery cell.

[0074] In some embodiments of the present application, optionally, please refer to Figure 7 , a gap 34 is formed between the second flexible portion 322 and the top 121 of the box girder 12 along its height direction X.

[0075] Since the first flexible portion 321 is provided on the side of the box girder 12, when the box girder 12 undergoes structural deformation due to the expansion and extrusion of the battery cell, the first flexible portion 321 will be stretched by the box girder 12. At this time, by providing a gap 34 between the second flexible portion 322 and the top 121 of the box girder 12, when the first flexible portion 321 is stretched, the second flexible portion 322 can deform towards the gap 34 side, achieving effective buffering and reducing the risk of the flexible circuit board 32 being broken. Among them, the size of the gap 34 can be determined according to the internal space of the battery device 100.

[0076] With such a design, a gap 34 is introduced, facilitating the deformation of the second flexible part 322 towards the gap 34 when the first flexible part 321 is stretched, achieving effective buffering and reducing the risk of the flexible circuit board 32 being broken.

[0077] In some embodiments of the present application, optionally, please refer to Figure 7 , the surface of the box girder 12 facing away from the battery cell includes a mounting surface 122, which is inclined with respect to the height direction X of the box girder 12, and one end of the mounting surface 122 close to the top 121 of the box girder 12 is closer to the battery cell, and the first flexible part 321 is arranged on the mounting surface 122.

[0078] The mounting surface 122 refers to the side surface of the box girder 12 facing away from the battery cell, indicating that both the first flexible part 321 and the connecting seat 33 are located on the side of the box girder 12 facing away from the battery cell, reducing the occupation of the space where the battery cell is located. The mounting surface 122 is inclined with respect to the height direction X, which facilitates the installation operation of the operator on the mounting surface 122 with a certain slope and reduces the risk of the connecting seat 33 or the transmission wire harness 31 slipping easily during the installation process.

[0079] With such a design, the introduction of the inclined mounting surface 122 not only helps to reduce the occupation of the space where the battery cell is located; but also facilitates the fixing operations of the flexible circuit board 32 and the transmission wire harness 31 on the box girder 12 respectively.

[0080] In some embodiments of the present application, optionally, please refer to Figure 7 , the angle between the mounting surface 122 and the height direction X of the box girder 12 is denoted as θ, where 0° < θ ≤ 5°.

[0081] It can be known that if the angle between the mounting surface 122 and the height direction X is too large, it will increase the thickness dimension of the bottom of the box girder 12 and increase the space occupation. Therefore, the angle is controlled between 0° and 5°, for example: it can be but not limited to 1°, 1.5°, 2°, 2.5°, 3°, 3.5°, 4°, 4.5°, 5°, etc.

[0082] With such a design, the angle is controlled between 0° and 5°, controlling the size of the bottom of the box girder 12 while meeting the installation convenience of the flexible circuit board 32 and the transmission wire harness 31, and reducing the occupation of the space on the side of the box back facing away from the battery cell.

[0083] In some embodiments of the present application, optionally, please refer to Figure 2 , the box body 10 further includes a first part 111, the box girder 12 is arranged inside the first part 111, and divides the inside of the first part 111 into a first chamber 13 and a second chamber 14; the battery cell is received in the first chamber 13, and the first flexible part 321 is arranged on the surface of the box girder 12 facing the second chamber 14.

[0084] The first part 111 refers to the structure of the box body 10 that can support battery cells. The box girder 12 is arranged inside the first part 111 and divides its internal space into a first chamber 13 and a second chamber 14. Among them, battery cells can be accommodated in the first chamber 13. At this time, the box girder 12 can effectively resist the expansion of the battery cells and improve the overall structural strength of the box body 10.

[0085] With such a design, the box girder 12 divides the inside of the first part 111 into a first chamber 13 and a second chamber 14, facilitating the orderly arrangement of battery cells and the electrical system.

[0086] In some embodiments of the present application, optionally, please refer to Figure 2 , the box body 10 further includes a second part 112. The second part 112 covers the first part 111, and the surface of the second part 112 facing away from the second chamber 14 is concave downward in the direction toward the second chamber 14 to form a concave pit 15.

[0087] It can be seen that a concave pit 15 is formed by concave downward at the position of the box main body 11 opposite to the second chamber 14, increasing the space on the outer surface of the box main body 11. In this way, when the battery device 100 is assembled in the vehicle 1000, the space inside the vehicle 1000 can be relatively increased at the concave pit 15. For example, the footrest part inside the vehicle 1000, etc., which is beneficial to improving the riding experience. With such a design, the first flexible part 321 is arranged on the side surface of the box girder 12, reducing the space occupied by the second chamber 14 in the height direction X, making it easier for the concave pit 15 to be concave downward, providing a larger space for the outer surface of the battery device 100, thereby facilitating the increase of the space inside the vehicle 1000 and being beneficial to improving the riding experience.

[0088] In some embodiments of the present application, optionally, please refer to Figure 3 , the transmission wire harness 31 is plugged and connected with the connection seat 33.

[0089] There are various plugging methods between the transmission wire harness 31 and the connection seat 33. For example, multiple pins can be arranged on the connection seat 33, and a port structure for inserting the pins is provided on the transmission wire harness 31; or, a port structure can be arranged on the connection seat 33, and multiple pins can be provided on the transmission wire harness 31, etc. To further facilitate the connection between the two, in some examples, the transmission wire harness 31 includes a wire plug 311, and the wire plug 311 is plugged and matched with the connection seat 33.

[0090] With such a design, it is convenient for the transmission wire harness 31 and the connection seat 33 to be quickly electrically connected.

[0091] In some embodiments of the present application, the present application provides an electrical device, and the electrical device includes the battery device 100 of any one of the above.

[0092] In some embodiments of the present application, please refer toFigures 2 to 7 , the present application provides a battery device 100, which includes a box body 11, a box beam 12, battery cells, a flexible circuit board 32, a connection base 33, a protective member 40, and a transmission wire harness 31. The box beam 12 is disposed inside the box body 11 and on one side of the battery cells. The flexible circuit board 32 includes a first flexible portion 321 and a second flexible portion 322. The second flexible portion 322 is located on the top 121 of the box beam 12 and is connected to the battery cells. The first flexible portion 321 is disposed on the side of the box beam 12 facing away from the battery cells and is connected to the transmission wire harness 31 through the connection base 33. At the same time, the protective member 40 is disposed on the portion of the first flexible portion 321 exposed outside the connection base 33.

[0093] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0094] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery device, characterized in that, The battery device comprises: Box body (10); A battery cell is housed in the box body (10), and the box body (10) comprises a box beam (12) located on one side of the battery cell; A signal transmission component (30) comprises a transmission harness (31), a flexible circuit board (32) and a connection seat (33), wherein the flexible circuit board (32) is connected to the battery cell; The flexible circuit board (32) comprises a first flexible portion (321), the first flexible portion (321) being arranged on a surface of the box beam (12) facing toward or facing away from the battery cell, the transmission harness (31) being electrically connected to the connection seat (33), and the connection seat (33) being arranged on a side of the first flexible portion (321) facing away from the box beam (12).

2. The battery device according to claim 1, wherein The signal transmission component (30) further comprises a protective member (40), wherein the protective member (40) covers a side of the first flexible portion (321) facing away from the box beam (12) and avoids the connecting seat (33).

3. The battery device according to claim 2, characterized in that, The connection seat (33) has a socket (331) for plugging the transmission harness (31), the orientation of the socket (331) intersecting with the thickness direction (Z) of the box beam (12), and the protective member (40) is located on a side of the connection seat (33) facing away from and / or toward the socket (331).

4. The battery device according to claim 3, characterized in that, The orientation of the socket (331) is consistent with the length direction (Y) of the box beam (12).

5. The battery device according to claim 1, characterized in that, The battery device further comprises a support member (60), wherein the support member (60) is connected to the box beam (12), and the first flexible portion (321) and the connecting seat (33) are stacked on a side of the support member (60) facing away from the box beam (12).

6. The battery device according to claim 1, wherein The flexible circuit board (32) also includes a second flexible portion (322) electrically connected to the first flexible portion (321); the second flexible portion (322) is located on one side of the top (121) of the box beam (12) along its own height direction (X), and is electrically connected to the battery cell.

7. The battery device according to claim 6, characterized in that, A gap (34) is formed between the second flexible portion (322) and the top (121) of the box beam (12) along its own height direction (X).

8. The battery device according to any one of claims 1-7, characterized in that, The surface of the box beam (12) facing away from the battery cell comprises a mounting surface (122), the mounting surface (122) being arranged obliquely relative to a height direction (X) of the box beam (12), and an end of the mounting surface (122) close to a top (121) of the box beam (12) being closer to the battery cell, and the first flexible portion (321) being arranged on the mounting surface (122).

9. The battery device according to claim 8, characterized in that, The angle between the installation surface (122) and the height direction (X) of the box beam (12) is denoted as θ, wherein 0°<θ≤5°.

10. The battery device according to any one of claims 1-7, characterized in that, The box body (10) further includes a first part (111), the box girder (12) is disposed inside the first part (111), and divides the interior of the first part (111) into a first chamber (13) and a second chamber (14); the battery cell is received in the first chamber (13), and the first flexible part (321) is disposed on the surface of the box girder (12) facing the second chamber (14).

11. The battery device according to claim 10, characterized in that, The box body (10) further includes a second part (112), the second part (112) covers the first part (111), and the surface of the second part (112) facing away from the second chamber (14) is recessed in the direction towards the second chamber (14) to form a recess (15).

12. The battery device according to any one of claims 1-7, characterized in that, The transmission wire harness (31) is plugged into the connection seat (33).

13. An electrical equipment, characterized in that, The electrical device includes the battery device according to any one of claims 1-12.

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