Battery device and electric device

Abstract

The utility model relates to the field of batteries, and provides a battery device and a power utilization device. The battery device comprises a box body and a battery monomer. The box body comprises a frame, a cover body and a beam body. A containing space is defined by the frame. The cover body covers one side of the frame. The beam body extends in the first direction and is arranged in the containing space, the two ends of the beam body in the first direction are connected to the frame, the beam body is located in the middle of the frame in the second direction, and the second direction is perpendicular to the first direction. The beam body comprises a hanging part and two convex parts, the two convex parts are arranged on the side, facing the cover body, of the hanging part and are arranged on the two sides, in the second direction, of the hanging part respectively, and a concave space is formed between the hanging part and the two convex parts; the cover body comprises a main body part and a concave part, the concave part sinks towards the hanging part relative to the main body part, and at least part of the concave part is located in the sunken space; and the concave part and the hanging part are jointly hung on an external hanging beam. Therefore, the middle strength and the overall strength of the battery device can be improved, and the anti-collision capability of the battery device in a collision accident can be optimized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] The interior of a vehicle is provided with a battery device for supplying power to the vehicle. Unlike the design of traditional cars in which an oil tank is arranged at the rear end or the front end, the battery device is usually arranged in a flat manner on the chassis of the vehicle. This layout feature makes the battery device prone to deformation and damage under impact in the event of a collision accident during actual use of the vehicle. However, the overall strength of the conventional battery device is insufficient to effectively protect the battery device itself in the event of a collision accident, which results in a high risk of deformation, damage, and even accidents of the battery device in the event of a collision accident. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the application provide a battery device, aiming to solve the problem of insufficient overall strength of the battery device, which cannot effectively protect the battery device itself in the event of a collision accident, resulting in a high risk of deformation, damage, and even accidents of the battery device in the event of a collision accident.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the embodiments of the application is as follows:

[0005] In a first aspect, a battery device is provided, comprising a box body and a battery monomer arranged in the box body, the box body comprising:

[0006] a frame, which encloses a containing space;

[0007] a cover body, which is arranged on one side of the frame;

[0008] a beam body, which is arranged in the containing space along a first direction, both ends of the beam body along the first direction are connected to the frame, and the beam body is located at the middle of the frame along a second direction, and the second direction is perpendicular to the first direction;

[0009] wherein the beam body comprises a mounting portion and two protruding portions, the two protruding portions are arranged on the side of the mounting portion facing the cover body, and are arranged on both sides of the mounting portion along the second direction, and a recessed space is formed between the mounting portion and the two protruding portions; the cover body comprises a main body portion and a recessed portion, the recessed portion is recessed relative to the main body portion and towards the mounting portion, and at least part of the recessed portion is located in the recessed space; and the recessed portion and the mounting portion are jointly mounted on an external mounting beam.

[0010] The battery device provided by the embodiments of the present application can make the beam body form a "U"-shaped structure based on the mounting portion and the two protruding portions in the middle of the frame along the second direction, and make the recessed portion of the cover body corresponding to the beam body be recessed relative to the main body portion and enter the recessed space between the mounting portion and the two protruding portions, so as to also form a "U"-shaped structure. Based on this, the mounting portion and the recessed portion, both of which are in a "U"-shaped structure, can be connected with the external mounting beam together to realize the mounting of the battery device, and the mounting height of the battery device can be reduced, so that the mounting height of the battery device is lowered relative to the total height of the battery device, thereby effectively improving the overall stability, anti-shaking and anti-overturning capability of the battery device, and the beam body, the recessed portion and the external mounting beam can be combined to form a middle anti-collision beam assembly, thereby effectively improving the middle strength and overall strength of the battery device, optimizing the anti-collision capability of the battery device in a collision accident (especially a side collision accident), reducing the side collision weak area, and reducing the risk of deformation, damage and the like of the battery device in a collision accident (especially a side collision accident) to affect normal use or even cause an accident.

[0011] Moreover, based on the above arrangement, the Z-direction stiffness can be significantly improved, the Z-direction main frequency and resonance main frequency of the battery device can be significantly improved, the battery device is less likely to resonate with external excitation, the risk of structure fatigue, component loosening, structure damage and performance failure caused by resonance and amplification of vibration amplitude can be reduced, and the anti-vibration capability, use reliability and service life can be improved.

[0012] In some embodiments, the battery device comprises a mounting member, the mounting member is arranged along a third direction and penetrates the connecting recessed portion and the mounting portion, and the mounting member is used to be connected with the external mounting beam, and the third direction is perpendicular to the first direction and the second direction.

[0013] By adopting the above scheme, the recessed portion and the mounting portion can be connected with the external mounting beam through the mounting member to be mounted on the external mounting beam, based on which, the connection convenience, connection strength, connection rigidity, connection reliability, connection stability of the recessed portion and the mounting portion with the external mounting beam can be improved. Moreover, the mounting member can reliably connect the recessed portion, the mounting portion and the external mounting beam together to form a reliable middle anti-collision beam assembly, thereby optimizing the middle strength, anti-vibration stability and anti-collision capability in a collision accident (especially a side collision accident) of the battery device.

[0014] In some embodiments, along the third direction, the total height of the battery device is H, the height from the end surface of the mounting member close to the main body portion to the main body portion is h, and 1 / 4H≤h≤1 / 2H.

[0015] By adopting the above scheme, the mounting height of the battery device can be lowered by about 1 / 4~1 / 2 (for example, 1 / 3) along the third direction relative to the total height of the battery device. Based on this, the battery device can have sufficient mounting height, the structural strength of the middle anti-collision beam assembly composed of the beam body, the recess and the external mounting beam can be maintained and improved, the middle strength and the overall strength of the battery device can be maintained and improved, and the anti-collision capability of the battery device in a collision accident (especially a side collision accident) can be optimized. In addition, according to the principle that the higher the hanging position, the more significant the shaking, and the lower the hanging position, the better the stability, the overall stability, the anti-shaking and anti-overturning capability of the battery device can be improved by lowering the mounting height of the battery device relative to the total height of the battery device by a certain distance.

[0016] In some embodiments, the mounting portion has a first rib extending along the first direction at the middle portion along the second direction, and the first rib is provided with a through hole at a position corresponding to the mounting piece; the mounting piece comprises a waist-shaped portion passing through the through hole, and an outer circumferential surface of the waist-shaped portion has two opposite first planes which respectively abut against the first rib to limit rotation of the waist-shaped portion in the through hole.

[0017] By adopting the above scheme, the waist-shaped portion can pass through the through hole in a posture in which the two first planes are opposite to the first rib, so that the two first planes can abut against the first rib respectively to limit circumferential rotation of the waist-shaped portion in the through hole, especially to limit deflection of the waist-shaped portion in the through hole due to assembly torque. In this way, the anti-rotation design of the waist-shaped portion and the mounting piece can be realized, the rotation problem of the waist-shaped portion and the mounting piece during assembly can be solved, and the risk of insecure and loose locking, poor air tightness and insufficient strength of the waist-shaped portion and the mounting piece due to deflection during assembly can be reduced.

[0018] In some embodiments, the first rib has a thickness of 2mm~4mm along the second direction.

[0019] By adopting the above scheme, the thickness of the first rib along the second direction can be moderate. Based on this, on the one hand, the first rib can have reduced defects such as pits during forming due to excessive thickness, the risk of reduced strength of the first rib due to forming defects can be reduced, and the forming convenience, forming quality and structural strength of the first rib can be maintained and improved. On the other hand, the strength of the first rib can be enhanced, the resistance of the first rib to torque can be improved, and the first rib can resist torque of 60N (Newton) or even 80N~100N, so that the first rib can reliably abut against the first plane of the waist-shaped portion to reliably limit rotation of the waist-shaped portion.

[0020] In some embodiments, the mounting portion includes a base layer, and an intermediate layer disposed between the base layer and the convex portion, the base layer is provided with a plurality of first cavities penetratingly arranged along the first direction and spacedly arranged along the second direction.

[0021] By adopting the above scheme, the base layer of the mounting portion can remove unnecessary solid materials inside through the plurality of first cavities to reduce the structural weight and material cost, and the adjacent two first cavities can maintain the structural strength, structural rigidity, and mechanical properties (such as bending stiffness, torsional properties, etc.) through the ribs.

[0022] In some embodiments, the intermediate layer is provided with a plurality of second cavities penetratingly arranged along the first direction and spacedly arranged along the second direction, and the number of the second cavities is greater than the number of the first cavities.

[0023] By adopting the above scheme, the intermediate layer of the mounting portion can remove unnecessary solid materials inside through the plurality of second cavities to reduce the structural weight and material cost, and the adjacent two second cavities can maintain the structural strength, structural rigidity, and mechanical properties (such as bending stiffness, torsional properties, etc.) through the ribs. Moreover, since the number of the second cavities is greater than the number of the first cavities, the number of the ribs of the intermediate layer between the adjacent two second cavities is greater than the number of the ribs of the base layer between the adjacent two first cavities, and the strength of the intermediate layer is greater than the strength of the base layer. In addition, since the intermediate layer is closer to the external mounting beam than the base layer, the strength of the intermediate layer is stronger, which is beneficial to improve the overall structural strength and structural reliability of the mounting portion, and is beneficial to improve the connection stability and connection reliability between the mounting portion and the external mounting beam.

[0024] In some embodiments, the convex portion includes a second rib and a third rib oppositely arranged, the second rib is disposed on one side of the third rib close to the recessed space, the mounting portion includes a fourth rib connected between the second rib and the third rib, and the second rib is inclinedly arranged toward the side close to the third rib in a direction away from the fourth rib.

[0025] By adopting the above scheme, the convex portion can form an inclined rib supporting the third rib through the second rib inclinedly arranged toward the side close to the third rib relative to the fourth rib, so as to enhance the strength of the convex portion and improve the resistance to the lateral expansion force (i.e., the anti-expansion force ability) applied by the convex portion to the battery monomer.

[0026] In some embodiments, the convex portion includes a fifth rib, and the fifth rib is inclinedly connected between the second rib and the third rib.

[0027] By adopting the above scheme, the convex part can be supported by the fifth rib obliquely connected between the second rib and the third rib, and the inclined rib supporting the third rib, thereby enhancing the strength of the convex part and improving the resistance of the convex part to the lateral expansion force applied by the battery monomer.

[0028] In some embodiments, the accommodation space is divided into two accommodation cavities by the beam body, and the battery monomers are provided in plurality, and the plurality of battery monomers are arranged in the two accommodation cavities.

[0029] By adopting the above scheme, the accommodation space is divided into two accommodation cavities by the beam body, and all the battery monomers are arranged in the two accommodation cavities. Based on this, the longitudinal beam extending in the second direction and other transverse beams extending in the first direction other than the beam body can be cancelled, thereby saving the space required by the longitudinal beam and other transverse beams, saving the gap space required between the beam and the battery monomer, leaving space to accommodate more battery monomers, facilitating the construction of the required electrical connection relationship of the battery monomers in the same accommodation cavity and forming a battery monomer assembly, and facilitating the construction of the required electrical connection relationship of the battery monomer assemblies arranged in the two accommodation cavities. The space required for the construction of the electrical connection relationship of the battery monomers can be saved, thereby improving the space utilization and energy density of the battery device. Moreover, since the middle anti-collision beam assembly composed of the beam body, the recess and the external mounting beam can maintain the anti-collision ability of the battery device and the electrical device in a side collision accident, and since the anti-collision beam at the front of the electrical device such as a vehicle can be used to maintain the anti-collision ability of the battery device and the electrical device in a head-on collision accident, the cancellation of the longitudinal beam will not affect the anti-collision ability of the battery device and the electrical device in a collision accident. Moreover, based on the arrangement of the present embodiment, the battery device of the present embodiment is less likely to resonate with external excitation, thereby reducing the risk of structural fatigue, component loosening, structural damage and performance failure caused by the amplification of vibration amplitude due to resonance, and optimizing the anti-vibration ability, use reliability and service life of the battery device.

[0030] In some embodiments, the plurality of battery monomers includes a first battery monomer and a second battery monomer, and the first battery monomer and the second battery monomer are arranged in the two accommodation cavities; the battery device further includes a current transmission member, and the electrode terminal of the first battery monomer and the electrode terminal of the second battery monomer are respectively welded to the same current transmission member, and the electrode terminal of the first battery monomer, the electrode terminal of the second battery monomer and the current transmission member are made of the same material.

[0031] By adopting the above scheme, the electrode terminal of the first battery monomer and the electrode terminal of the second battery monomer can be directly welded with the same current transmission piece of the same material, respectively, so that the series connection is conveniently, quickly and reliably realized, and the electrode terminal, the current transmission piece and the electrode terminal of each group of first battery monomers and second battery monomers can correspondingly omit two insulation protection bases, two fixing bolts and two insulation protection covers, so that the number of parts can be effectively reduced, the structure can be effectively simplified, and the cost can be effectively reduced.

[0032] In some embodiments, the battery device includes a signal transmission assembly, a part of the signal transmission assembly is arranged in the recessed space, the signal transmission assembly includes a transmission wire harness, a flexible circuit board and a connector, the flexible circuit board is electrically connected with the battery monomer, the transmission wire harness is electrically connected with the flexible circuit board via the connector, and the connector is arranged between the convex part and the concave part.

[0033] By adopting the above scheme, for the signal transmission assembly which needs to be wired from the recessed space, the connector can be obliquely arranged in the space between the convex part and the concave part, and the transmission wire harness can be electrically connected with the flexible circuit board via the connector in the space between the convex part and the concave part. Based on this, while meeting the effective electrical connection, the space occupation of the connector and the signal transmission assembly between the convex part and the main body part can be reduced, the space occupation of the connector and the signal transmission assembly between the mounting part and the concave part can be reduced, and the assembly interference between the connector and the cover can be reduced, so that the layout can be optimized and compacted, the space utilization rate can be improved, the risk of the space outside the beam body in the back of the recessed part being limited due to the connector and the signal transmission assembly can be reduced, the space outside the beam body in the back of the recessed part can be maintained and increased, the external mounting beam can be conveniently arranged in the space outside the beam body in the back of the recessed part and connected with the recessed part and the mounting part, and the core design of "connecting via the mounting part and the recessed part which are both in a U-shaped structure, so that the mounting height of the battery device is lowered relative to the total height of the battery device" can be compatible.

[0034] In some embodiments, the recessed part includes a mounting segment and a bending segment, the mounting segment is used for connecting with the external mounting beam, the bending segment is bent and connected between the main body part and the mounting segment, the connector is arranged between the convex part and the bending segment, and the bending segment is outwardly provided with a convex rib corresponding to at least a part of the connector.

[0035] By adopting the above scheme, in the case that the connector is arranged in the space between the protruding portion and the bending segment, the bending segment is provided with the protruding ribs outwardly corresponding to at least part of the connector, so as to leave sufficient accommodation space for the connector and the transmission wire harness via the space between the protruding ribs and the protruding portion, thereby being compatible with the oblique insertion design of the connector, and the assembly interference between the connector and the bending segment can be reduced. On this basis, the remaining part of the bending segment can not be outwardly protruding, that is, the space between the remaining part of the bending segment and the protruding portion can not be excessively large, based on which, the space on the outer side of the recess portion away from the beam body can be maintained and increased, the external mounting beam can be more easily entered into the space on the outer side of the recess portion away from the beam body, and connected with the mounting segment and the mounting portion, thereby being beneficial to improving the overall stability, anti-shaking and anti-overturning capability, middle strength and overall strength of the battery device.

[0036] In some embodiments, the mounting portion is provided with two avoiding grooves on the side facing the recessed space, the two avoiding grooves are arranged at two ends of the mounting portion along the first direction, and part of the transmission wire harness is accommodated in the avoiding grooves.

[0037] By adopting the above scheme, the part of the transmission wire harness can be accommodated in the avoiding grooves by sinking through the avoiding grooves on the end side of the recessed space along the first direction, so as to reduce the assembly interference between the transmission wire harness and the recess portion, and facilitate the layout of the transmission wire harness.

[0038] In some embodiments, the beam body is arranged in axial symmetry about the symmetric plane which is perpendicular to the second direction.

[0039] By adopting the above scheme, the structure and size of the beam body on both sides of the symmetric plane can be completely consistent, based on which, during assembly, the beam body can be fitted and installed with the frame regardless of whether the beam body is assembled into the accommodating space of the frame in a "forward attitude" or a "reverse attitude", thereby the directional installation requirement of the beam body can be reduced, the assembly error rate of the beam body can be reduced, the assembly fault tolerance and assembly efficiency of the beam body can be improved, and the production foolproofing problem can be solved to a certain extent.

[0040] In some embodiments, the width of the beam body along the second direction is 160mm-200mm.

[0041] By adopting the above scheme, based on the "U"-shaped structure of the beam body formed by the mounting portion and the two protruding portions, the width of the beam body along the second direction can reach 160mm-200mm, based on which, the structural strength and structural rigidity of the beam body can be greatly strengthened, the middle strength and overall strength of the battery device can be optimized and improved, and the anti-collision capability of the battery device in a collision accident (especially a side collision accident) can be optimized.

[0042] In a second aspect, a power consuming device is provided, which comprises an external mounting beam and the battery device provided in the embodiments of the present application, and the recess and the mounting portion of the battery device are jointly mounted on the external mounting beam.

[0043] By using the above scheme, the power consuming device can improve the anti-collision ability (especially the anti-side collision ability), the use performance, the use reliability, and the use life of the power consuming device by using the battery device provided in the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative labor.

[0045] Figure 1 The structural schematic diagram of a vehicle is provided for some embodiments of the present application;

[0046] Figure 2 The three-dimensional schematic diagram of a battery device is provided for some embodiments of the present application;

[0047] Figure 3 The partial structural schematic diagram of a battery device is provided for some embodiments of the present application; Figure 2

[0048] The enlarged view of A area is provided for some embodiments of the present application; Figure 4 Figure 3 The top view of a battery device is provided for some embodiments of the present application;

[0049] Figure 5 Figure 2 The sectional view along B-B of a battery device is provided for some embodiments of the present application;

[0050] Figure 6 The sectional view along C-C of a battery device is provided for some embodiments of the present application; Figure 5

[0051] The sectional view along D-D of a battery device is provided for some embodiments of the present application; Figure 7 Figure 5 The enlarged view of E area is provided for some embodiments of the present application;

[0052] Figure 8 Figure 7 The frequency sweep simulation diagram of a battery device is provided for some embodiments of the present application.

[0053] Figure 9 The frequency sweep simulation diagram of a battery device is provided for some embodiments of the present application. Figure 4

[0054] The frequency sweep simulation diagram of a battery device is provided for some embodiments of the present application. Figure 10

[0055] ​​​​​In the drawings, reference numerals:

[0056] 1 - battery device, 2 - controller, 3 - motor; 10 - battery cell, 10a - first battery cell, 10b - second battery cell; 20 - box body, 21 - frame, 211 - containing space, 2111 - containing cavity; 22 - cover body, 221 - main body part, 222 - recess, 2221 - mounting section, 2222 - bending section, 22221 - convex rib; 23 - beam body, 231 - mounting part, 2311 - first rib, 2312 - through hole, 2313 - base layer, 23131 - first cavity, 2314 - intermediate layer, 23141 - second cavity, 2315 - fourth rib, 2316 - avoiding groove; 232 - convex part, 2321 - second rib, 2322 - third rib, 2323 - fifth rib; 233 - recessed space, 234 - symmetry plane; 30 - mounting piece, 31 - mounting hole, 32 - bottom bolt, 33 - bottom sleeve, 331 - waist-shaped part, 3311 - first plane, 34 - top sleeve, 35 - top bolt; 4 - external mounting beam; 40 - current transmission piece; 50 - signal transmission assembly, 51 - transmission wire harness, 52 - flexible circuit board, 53 - connector, 60 - fixing plate; x - first direction, y - second direction, z - third direction, d1 - thickness of the first rib along the second direction, β - included angle between the second rib and the fourth rib, d2 - width of the beam body along the second direction. DETAILED DESCRIPTION

[0057] In order to make the technical problems, technical solutions and beneficial effects of the present application clear, the present application will be described in detail below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application. If not specifically stated, all embodiments and optional embodiments of the present application can be combined to form new technical solutions. If not specifically stated, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0058] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0059] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0060] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0061] The vehicle can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or an extended range car. The vehicle is internally provided with a battery device, which is a modular structure including at least two battery monomers to provide higher voltage and capacity, for example, a battery module, a battery pack or a battery pack. The battery device is used to power the vehicle, for example, the battery device can be used as the operating power supply of the vehicle.

[0062] Unlike the design of traditional cars that place the fuel tank at the rear end or the front end, the battery device is usually suspended at the chassis position of the vehicle. This layout feature makes the battery device prone to deformation and damage in the event of a collision accident during actual use of the vehicle, affecting normal use, and even causing accidents. In view of this, higher and stringent requirements are put forward for the overall strength of the battery device.

[0063] However, the traditional battery device is usually flatly mounted at the bottom of the vehicle, and the battery device has only a crossbeam with a width of 20mm~25mm in the middle, lacking special structural reinforcement, resulting in insufficient overall strength of the battery device (especially the middle strength), which cannot effectively protect the battery device itself in a collision accident, causing the battery device to deform, damage and affect normal use, and even causing accidents with a high risk.

[0064] Therefore, some embodiments of the battery device can form a beam body in a "U" shape based on the mounting portion and the two protrusions in the middle of the frame along the second direction, and the recessed portion of the cover body corresponding to the beam body is recessed relative to the main body portion and enters the recessed space between the mounting portion and the two protrusions, thereby also forming a "U" shape. Based on this, the mounting portion and the recessed portion, which are both in a "U" shape, can be connected together with the external mounting beam to achieve the mounting of the battery device, and the mounting height of the battery device can be reduced, so that the mounting height of the battery device is lowered relative to the total height of the battery device, thereby effectively improving the overall stability, anti-shaking and anti-overturning ability of the battery device. In addition, the beam body, the recessed portion and the external mounting beam can collectively form a middle anti-collision beam assembly, thereby effectively improving the middle strength and overall strength of the battery device, optimizing the anti-collision ability of the battery device in a collision accident (especially a side collision accident), reducing the side collision weak area, and reducing the risk of deformation, damage and even accidents affecting normal use of the battery device in a collision accident (especially a side collision accident).

[0065] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power source, or in various energy storage systems using the battery device as an energy storage element. The power consumption device can be, but is not limited to, a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc.

[0066] In order to illustrate the technical solutions provided in the present application, the following will be described in detail with reference to specific drawings and embodiments, and taking "the power consumption device as a vehicle" as an example.

[0067] Please refer to Figure 1 , Figure 1The structural diagram of a vehicle is provided for some embodiments of the present application. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile or a range extended automobile, etc. The vehicle is internally provided with a battery device 1, which can be arranged at the bottom, head or tail of the vehicle. The battery device 1 is used to supply power for the vehicle, for example, the battery device 1 can be used as the operating power source of the vehicle. The vehicle can further include a controller 2 and a motor 3, and the controller 2 is used to control the battery device 1 to supply power for the motor 3, for example, to meet the power demand of the vehicle during starting, navigation and driving.

[0068] In some embodiments of the present application, the battery device 1 can not only be used as the operating power source of the vehicle, but also be used as the driving power source of the vehicle, to replace or partially replace the fuel or natural gas to provide driving power for the vehicle.

[0069] Please refer to Figure 2 、 Figure 3 、 Figure 4 Some embodiments of the present application provide a battery device 1, which includes a box body 20 and a battery cell 10 arranged in the box body 20. Please refer to Figure 5 、 Figure 6 The box body 20 includes a frame 21, a cover body 22 and a beam body 23. The frame 21 forms an accommodating space 211. The cover body 22 is arranged on one side of the frame 21. The beam body 23 is arranged in the accommodating space 211 along a first direction x, and the two ends of the beam body 23 along the first direction x are connected to the frame 21, respectively. The beam body 23 is located at the middle of the frame 21 along a second direction y, and the second direction y is perpendicular to the first direction x. The beam body 23 includes a mounting portion 231 and two protruding portions 232, and the two protruding portions 232 are arranged on the side of the mounting portion 231 facing the cover body 22, and are arranged on the two sides of the mounting portion 231 along the second direction y, respectively. The mounting portion 231 and the two protruding portions 232 form a recessed space 233. The cover body 22 includes a main body portion 221 and a recessed portion 222, and the recessed portion 222 is recessed relative to the main body portion 221 and faces the mounting portion 231, and is at least partially located in the recessed space 233. The recessed portion 222 and the mounting portion 231 are jointly mounted on an external mounting beam 4.

[0070] It should be noted that the box 20 is the basic load-bearing structure of the battery device 1. The battery cell 10 is the smallest unit for storing and outputting electric energy. The battery cell 10 is arranged in the box 20, and the box 20 can prevent dust, water, and other foreign matters from affecting the performance of the battery cell 10 and other components contained therein, thereby effectively prolonging the service life of the battery device 1. In some embodiments, a plurality of battery cells 10 can be provided, and the plurality of battery cells 10 can be connected in series, in parallel, or in a mixed manner. The mixed connection means that there is both series connection and parallel connection. The battery cell 10 can be a lithium ion secondary battery cell, a lithium-sulfur battery cell, a sodium-lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, etc. The battery cell 10 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc. The battery cell 10 can be packaged in different ways to form a cylindrical battery cell, a square battery cell, or a soft-pack battery cell, etc.

[0071] It should also be noted that the box 20 includes a frame 21, a cover 22, and a beam 23. The frame 21 can define a containing space 211 for containing the battery cell 10, and the containing space 211 has two openings arranged opposite to each other. The cover 22 covers one side opening of the frame 21. The specific form of the frame 21 can be designed according to the actual application scenario, for example, it can be a regular or irregular three-dimensional frame structure such as a rectangle or a polygon. The shape of the cover 22 is basically matched with the shape of the opening of the frame 21, so that the cover 22 can fit the opening of the frame 21. The specific material of the frame 21 and the cover 22 can be set as needed, for example, a material with certain strength and corrosion resistance (such as a metal alloy) can be selected to maintain the structural stability of the box 20 as a whole. For example, in some embodiments, the cover 22 can be a steel material, for example, a DC53 steel material with good plasticity can be used. DC53 is the grade of steel, and DC steel can also be called deep drawing steel or tensile steel. DC steel generally has low carbon content and good toughness. The number after DC is generally used to represent the toughness of the steel. The larger the number, the better the toughness. For example, the toughness of DC53 steel is greater than that of DC52 steel.

[0072] The beam 23 is a crossbeam structure extending along the first direction x. The beam 23 is arranged in the containing space 211 and is connected to the frame 21 at both ends along the first direction x to be fixed relative to the frame 21. The connection between the beam 23 and the frame 21 can be achieved by welding, bolt connection, rivet connection, mortise and tenon connection, adhesion, etc.

[0073] The beam 23 is located at the middle of the frame 21 along the second direction y and is mainly used to increase the strength of the middle part of the battery device 1. The second direction y is perpendicular to the first direction x.

[0074] The beam 23 includes a mounting portion 231 and two protrusions 232. The mounting portion 231 extends along a first direction x, and its projected shape along the first direction x may be, but is not limited to, a rectangle. The protrusions 232 also extend along the first direction x, and their projected shapes along the first direction x may be, but are not limited to, trapezoids, triangles, rectangles, etc. Both protrusions 232 are located on the side of the mounting portion 231 facing the cover 22, and are also located on both sides of the mounting portion 231 along a second direction y, with a gap between them. A recessed space 233 is formed between the mounting portion 231 and the two protrusions 232, meaning that the projected shape of the beam 23 along the first direction x is roughly "U"-shaped.

[0075] The cover 22 includes a main body 221 and a recess 222. The recess 222 is located at the middle of the cover 22 along the second direction y and is correspondingly disposed with respect to the beam 23. Corresponding to the beam 23, the recess 222 also extends along the first direction x. The recess 222 is recessed relative to the main body 221 toward the mounting portion 231. The recess 222, which is recessed relative to the main body 221, is aligned between the two protrusions 232, that is, it enters the recessed space 233. The projected shape of the recess 222 along the first direction x is also U-shaped.

[0076] The external mounting beam 4 is a crossbeam used to mount the battery device 1 for electrical devices (such as vehicles). The external mounting beam 4 is located on the outer side of the recess 222, facing away from the beam body 23, with a portion of the external mounting beam 4 extending into (i.e., located) the space on the outer side of the recess 222 facing away from the beam body 23. The recess 222 and the mounting portion 231 are connected together to the external mounting beam 4 to mount the battery device 1. The connection method between the recess 222 and the mounting portion 231 and the external mounting beam 4 can be, but is not limited to, bolted connections, welding, etc.

[0077] In summary, the battery device 1 provided by the embodiments of the present application can make the beam body 23 form a "U"-shaped structure based on the mounting portion 231 and the two protruding portions 232 at the middle of the frame 21 along the second direction y, and make the recessed portion 222 of the cover body 22 corresponding to the beam body 23 be recessed relative to the main body portion 221 and enter the recessed space 233 between the mounting portion 231 and the two protruding portions 232, so as to also form a "U"-shaped structure. Based on this, the mounting portion 231 and the recessed portion 222, both of which are in a "U"-shaped structure, can be connected with the external mounting beam 4 together, so as to realize the mounting of the battery device 1, and the mounting height of the battery device 1 can be reduced, so that the mounting height of the battery device 1 is lowered relative to the total height of the battery device 1, thereby effectively improving the overall stability, anti-shaking and anti-overturning capability of the battery device 1, and the beam body 23, the recessed portion 222 and the external mounting beam 4 can jointly form a middle anti-collision beam assembly, thereby effectively improving the middle strength and overall strength of the battery device 1, optimizing the anti-collision capability of the battery device 1 in a collision accident (especially a side collision accident), reducing the side collision weak area, and reducing the risk of deformation, damage and affecting normal use or even causing an accident of the battery device 1 in a collision accident (especially a side collision accident).

[0078] Moreover, based on the above arrangement, the Z-direction stiffness can be significantly improved, and the Z-direction main frequency and resonance main frequency of the battery device 1 can be significantly improved. Compared with the Z-direction main frequency of about 30 Hz of the existing battery device, the Z-direction main frequency of the battery device 1 of the embodiments can reach more than 50 Hz (in a specific example, about 57 Hz). Based on this, compared with the existing battery device, the battery device 1 of the embodiments is less likely to resonate with external excitation (such as the frequency of road bumps when the vehicle is running or the vibration frequency of equipment operation), and the risk of amplifying the vibration amplitude due to resonance, thereby causing structural fatigue, component loosening, structural damage, performance failure can be reduced, and the anti-vibration capability, use reliability and service life can be improved. The Z-direction refers to the vertical direction perpendicular to the ground, such as the up-down direction of the vehicle, such as the third direction z. The Z-direction main frequency is the natural frequency of the battery device 1 when vibrating in the Z direction (the dominant frequency of the structure itself).

[0079] Please refer to Figure 2 , Figure 4 , Figure 6 In some embodiments of the present application, the battery device 1 comprises a mounting piece 30, which is arranged along the third direction z and penetrates the connecting recessed portion 222 and the mounting portion 231, and the mounting piece 30 is used to connect with the external mounting beam 4, and the third direction z is perpendicular to the first direction x and the second direction y.

[0080] It should be noted that the mounting piece 30 is a connecting component for connecting with the external mounting beam 4. The mounting piece 30 penetrates the connecting recess 222 and the mounting portion 231 along the third direction z, and the recess 222 and the mounting portion 231 can be connected with the external mounting beam 4 via the mounting piece 30 to be mounted on the external mounting beam 4. Wherein, the number of the mounting piece 30 can be set as required, for example, as shown in Figure 2 、 Figure 4 in some embodiments, three mounting pieces 30 are provided, and the three mounting pieces 30 are arranged at intervals along the first direction x.

[0081] Wherein, the structure form of the mounting piece 30 can adopt but is not limited to adopting sleeve, nut, hook and the like structure form. For example, as shown in Figure 7 in some embodiments, the mounting piece 30 is a sleeve, and the mounting piece 30 has a mounting hole 31 penetrating along the third direction z, and the mounting piece 30 is connected with the external mounting beam 4 through a fastener (such as a bolt) penetrating in the mounting hole 31. For example, as shown in Figure 2 in some embodiments, in the case where the mounting piece 30 is a sleeve, the mounting piece 30 can include a bottom bolt 32, a bottom sleeve 33, a top sleeve 34, and a top bolt 35 arranged in sequence along the third direction z, the bottom sleeve 33 and the top sleeve 34 are sleeved and matched and are penetrated in the recess 222 and the mounting portion 231, the bottom bolt 32 is tightly fixed to one end of the bottom sleeve 33 away from the top sleeve 34, the top bolt 35 is tightly fixed to one end of the top sleeve 34 away from the bottom sleeve 33, and the mounting hole 31 penetrates through the bottom bolt 32, the bottom sleeve 33, the top sleeve 34, and the top bolt 35 along the third direction z.

[0082] By adopting the above scheme, the recess 222 and the mounting portion 231 can be connected with the external mounting beam 4 via the mounting piece 30 to be mounted on the external mounting beam 4, based on which, the connection convenience, connection strength, connection rigidity, connection reliability, connection stability of the recess 222 and the mounting portion 231 with the external mounting beam 4 can be improved. Moreover, the mounting piece 30 can reliably connect the recess 222, the mounting portion 231, and the external mounting beam 4 together to form a reliable middle anti-collision beam assembly, so that the middle strength, anti-vibration stability, and anti-collision ability in a collision accident (especially a side collision accident) of the battery device 1 can be optimized.

[0083] Please refer to Figure 6 、 Figure 7 in some embodiments of the present application, along the third direction z, the total height of the battery device 1 is H, the height from the end surface of the mounting piece 30 close to the main body portion 221 to the main body portion 221 is h, and 1 / 4H≤h≤1 / 2H.

[0084] It should be noted that the total height (i.e. the maximum height) of the battery device 1 along the third direction z is H. The mounting member 30 has two opposite end faces along the third direction z, one of which is relatively close to the main body portion 221, and the other of which is relatively far from the main body portion 221. The height of the end face of the mounting member 30 close to the main body portion 221 to the main body portion 221 along the third direction z is h, which reflects the sinking degree of the mounting height of the battery device 1 relative to H, and the mounting height of the battery device 1 is approximately H-h. h is configured to be 1 / 4H≤h≤1 / 2H, for example, h can be approximately equal to 1 / 4H, 1 / 3H, 1 / 2H, etc. Wherein, H and h can be directly measured by, but not limited to, a tape measure or a ruler.

[0085] By adopting the above scheme, the mounting height of the battery device 1 can be sunk by approximately 1 / 4-1 / 2 (for example, 1 / 3) relative to the total height of the battery device 1 along the third direction z. Based on this, the battery device 1 can have sufficient mounting height, the structural strength of the middle anti-collision beam assembly composed of the beam body 23, the recess portion 222 and the external mounting beam 4 can be maintained and improved, the middle strength and the overall strength of the battery device 1 can be maintained and improved, and the anti-collision ability of the battery device 1 in a collision accident (especially a side collision accident) can be optimized; and it can also be referred to the principle that the higher the hanging position, the more significant the shaking, and the lower the hanging position, the better the stability, so that the overall stability, anti-shaking and anti-overturning ability of the battery device 1 are improved by sinking the mounting height of the battery device 1 relative to the total height of the battery device 1 by a certain distance.

[0086] Please refer to Figure 6 、 Figure 7 、 Figure 8 In some embodiments of the present application, the mounting portion 231 has a first rib 2311 extending along the first direction x at the middle portion along the second direction y. The mounting member 30 includes a waist-shaped portion 331 passing through the through hole 2312. The outer circumferential surface of the waist-shaped portion 331 has two opposite first planes 3311, which respectively abut against the first rib 2311 to limit the rotation of the waist-shaped portion 331 in the through hole 2312.

[0087] It should be noted that the mounting portion 231 has a first rib 2311 extending along the first direction x and located at the middle portion along the second direction y. The first rib 2311 is provided with a through hole 2312 corresponding to the mounting member 30, and the through hole 2312 is provided along the third direction z. The through hole 2312 is used for partially passing the mounting member 30 therein.

[0088] The part of the mounting piece 30 penetrating the penetrating hole 2312 is a waist-shaped portion 331. The projection shape (i.e., the outer shape) of the waist-shaped portion 331 along the third direction z is in the shape of a waist. Based on the characteristics of the waist shape, the outer circumferential surface of the waist-shaped portion 331 has two opposite first planes 3311. Based on this, during the process of penetrating the waist-shaped portion 331 into the penetrating hole 2312, the waist-shaped portion 331 can be penetrated into the penetrating hole 2312 in a posture in which the two first planes 3311 are opposite to the first ribs 2311, so that the two first planes 3311 are respectively in abutting cooperation with the first ribs 2311, thereby limiting the circumferential rotation of the waist-shaped portion 331 in the penetrating hole 2312. In this way, the anti-rotation design of the waist-shaped portion 331 and the mounting piece 30 can be achieved, the rotation problem of the waist-shaped portion 331 and the mounting piece 30 during assembly can be solved, and the risk of insecure locking, insecure locking, poor air tightness (i.e., the existence of a gas leakage passage), and insufficient strength due to the deflection of the waist-shaped portion 331 and the mounting piece 30 during assembly can be reduced.

[0089] As an example, as shown in Figure 7 , Figure 8 In some embodiments, the mounting piece 30 is a sleeve, which includes, in sequence along the third direction z, a bottom bolt 32, a bottom sleeve 33, a top sleeve 34, and a top bolt 35. The bottom sleeve 33 and the top sleeve 34 are in sleeve cooperation and are collectively penetrated into the recess 222 and the mounting portion 231. The bottom bolt 32 is tightly fixed to one end of the bottom sleeve 33 away from the top sleeve 34. The top bolt 35 is tightly fixed to one end of the top sleeve 34 away from the bottom sleeve 33. The mounting principle of the mounting piece 30 can be referred to as follows: first, the bottom sleeve 33 is assembled onto the beam body 23, and then the bottom bolt 32 is used to tighten the bottom sleeve 33. The torque of this process is large, which can cause the bottom sleeve 33 to deflect and thus result in insecure locking, insecure locking, poor air tightness, and insufficient strength. Similarly, the top sleeve 34 is also screwed onto the bottom sleeve 33 by means of a thread. The torque of this process is also large, which can also cause the bottom sleeve 33 to deflect and thus result in insecure locking, insecure locking, poor air tightness, and insufficient strength. Therefore, the assembly and rotation problem of the bottom sleeve 33 needs to be mainly solved. Thus, the bottom sleeve 33 can be provided with the waist-shaped portion 331, which can be penetrated into the penetrating hole 2312 in a posture in which the two first planes 3311 are opposite to the first ribs 2311. The two first planes 3311 of the waist-shaped portion 331 can be respectively in abutting cooperation with the first ribs 2311 to solve the assembly and rotation problem of the bottom sleeve 33.

[0090] By adopting the above scheme, the waist-shaped portion 331 can be threaded into the threading hole 2312 in a posture that the two first planes 3311 are opposite to the first ribs 2311, so that the two first planes 3311 can be respectively abutted with the first ribs 2311 to limit the circumferential rotation of the waist-shaped portion 331 in the threading hole 2312, and especially to limit the deflection of the waist-shaped portion 331 in the threading hole 2312 due to the assembly torque. In this way, the anti-rotation design of the waist-shaped portion 331 and the mounting piece 30 can be realized, the rotation problem of the waist-shaped portion 331 and the mounting piece 30 during assembly can be solved, and the risk of insecure locking, loose locking, poor air tightness, and insufficient strength caused by the deflection of the waist-shaped portion 331 and the mounting piece 30 during assembly can be reduced.

[0091] Please refer to Figure 6 、 Figure 7 、 Figure 8 In some embodiments of the present application, the thickness d1 of the first rib along the second direction is 2 mm to 4 mm.

[0092] It should be noted that the thickness d1 of the first rib along the second direction is 2 mm to 4 mm, for example, it can be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc. The thickness d1 of the first rib along the second direction can be accurately measured by a vernier caliper, but is not limited thereto.

[0093] By adopting the above scheme, the thickness d1 of the first rib along the second direction can be moderate. On the one hand, it can reduce the defects such as pits of the first rib 2311 during forming due to excessive thickness, reduce the risk of weakening the strength of the first rib 2311 due to forming defects, and maintain and improve the forming convenience, forming quality, and structural strength of the first rib 2311. On the other hand, it can enhance the strength of the first rib 2311, improve the resistance of the first rib 2311 to torque, and enable the first rib 2311 to resist a torque of 60 N (Newton) or even 80 N to 100 N, so that the first rib 2311 can reliably abut with the first plane 3311 of the waist-shaped portion 331 to reliably limit the rotation of the waist-shaped portion 331.

[0094] Please refer to Figure 5 、 Figure 6 、 Figure 7 In some embodiments of the present application, the mounting portion 231 includes a base layer 2313 and an intermediate layer 2314 disposed between the base layer 2313 and the convex portion 232, and the base layer 2313 is provided with a plurality of first cavities 23131 penetratingly arranged along the first direction x and spaced apart along the second direction y.

[0095] It should be noted that the mounting portion 231 comprises a base layer 2313 and an intermediate layer 2314, the base layer 2313 and the intermediate layer 2314 are both arranged to extend along the first direction x, the intermediate layer 2314 and the base layer 2313 are arranged to be stacked along the second direction y, and the intermediate layer 2314 is arranged between the base layer 2313 and the convex portion 232, that is, the two convex portions 232 are arranged on the side of the intermediate layer 2314 away from the base layer 2313. The projection shape (i.e. the outer shape) of the base layer 2313 along the first direction x can be, but is not limited to, a rectangle and the like. The projection shape (i.e. the outer shape) of the intermediate layer 2314 along the first direction x can be, but is not limited to, a rectangle and the like.

[0096] The base layer 2313 is provided with a plurality of first cavities 23131, each first cavity 23131 is arranged to penetrate the base layer 2313 along the first direction x, and the plurality of first cavities 23131 are arranged to be spaced apart along the second direction y, and adjacent two first cavities 23131 are separated by a rib. Among them, the width of each first cavity 23131 along the second direction y can be the same or different, and each first cavity 23131 along the second direction y can be arranged at equal intervals or unequal intervals, and the projection shape of the first cavity 23131 along the first direction x can be, but is not limited to, a rectangle and the like.

[0097] By adopting the above scheme, the base layer 2313 of the mounting portion 231 can remove unnecessary solid materials inside through the plurality of first cavities 23131 to reduce the structural weight and the material cost, and the structural strength, the structural rigidity and the mechanical properties (such as the bending stiffness, the torsional performance and the like) can be considered by the ribs between adjacent two first cavities 23131.

[0098] Please refer to Figure 5 , Figure 6 , Figure 7 In some embodiments of the present application, the first cavity 23131 is provided with an even number.

[0099] By adopting the above scheme, the even number of first cavities 23131 can be evenly arranged (even symmetrically arranged) along the second direction y, based on which the middle part of the base layer 2313 along the second direction y can have a rib (as the first rib 2311) instead of the first cavity 23131, therefore, the present embodiment can be combined with the related embodiment that the middle part of the mounting portion 231 along the second direction y has the first rib 2311 arranged to extend along the first direction x, so as to facilitate forming the first rib 2311 in the middle part of the base layer 2313 along the second direction y, so as to realize the anti-rotation design of the waist-shaped portion 331 and the mounting piece 30 through the first rib 2311.

[0100] Of course, in other embodiments, the base layer 2313 of the mounting portion 231 can be provided with an odd number of the first cavities 23131. In other embodiments, the mounting portion 231 can be a single-layer structure, i.e., the mounting portion 231 is provided with only one row of cavities in the third direction z, and the number, size, and position of the cavities can be set as needed. In other embodiments, the mounting portion 231 can be a multi-layer structure of at least three layers, i.e., the mounting portion 231 is provided with at least three rows of cavities in the third direction z, and the number, size, and position of each layer / row of cavities can be set as needed.

[0101] Please refer to Figure 5 , Figure 6 , Figure 7 In some embodiments of the present application, the number of the first cavities 23131 is 4.

[0102] Understandably, in the case where the width of the base layer 2313 along the second direction y is constant, the more the number of the first cavities 23131, the smaller the width of the first cavities 23131 along the second direction y, which results in greater difficulty in molding (such as extrusion molding), and the more the number of the ribs between the adjacent two first cavities 23131, which increases the weight, cost, and strength. Therefore, by using the above-mentioned scheme, by preferably setting the number of the first cavities 23131 to be 4, the width of the first cavities 23131 along the second direction y is moderate, which reduces the difficulty in molding (such as extrusion molding), so that the processing and molding of the first cavities 23131, the base layer 2313, the mounting portion 231, and the beam body 23 can be facilitated, and the molding convenience, molding precision, and molding quality can be improved. The base layer 2313 can have sufficient strength, and the structural weight and material cost can be reduced. Moreover, based on the setting of the four first cavities 23131, the four first cavities 23131 can be evenly arranged (even symmetrically arranged) along the second direction y, and based on this, the middle part of the base layer 2313 along the second direction y can have a rib (as the first rib 2311) instead of the first cavity 23131. Therefore, the present embodiment is particularly suitable for being combined with the related embodiments in which the middle part of the mounting portion 231 along the second direction y has the first rib 2311 extending along the first direction x, so that the first rib 2311 can be formed in the middle part of the base layer 2313 along the second direction y, and the anti-rotation design of the waist-shaped portion 331 and the mounting member 30 can be achieved through the first rib 2311.

[0103] Of course, in other embodiments, the number of the first cavities 23131 can be set to be other even numbers, such as 2, 6, etc.

[0104] Please refer to Figure 5 , Figure 6 , Figure 7In some embodiments of the present application, the intermediate layer 2314 is provided with a plurality of second cavities 23141 penetrating along the first direction x and spaced along the second direction y, and the number of the second cavities 23141 is greater than the number of the first cavities 23131.

[0105] It should be noted that the intermediate layer 2314 is a part of the mounting portion 231 provided on the base layer 2313 and facing the two protrusions 232, the recess 222 and the external mounting beam 4. The intermediate layer 2314 is provided with a plurality of second cavities 23141, each of which penetrates the intermediate layer 2314 along the first direction x, and the plurality of second cavities 23141 are spaced along the second direction y and separated by the ribs between adjacent two second cavities 23141. The number of the second cavities 23141 is greater than the number of the first cavities 23131. The width of each second cavity 23141 along the second direction y can be the same or different, and the second cavities 23141 along the second direction y can be equally spaced or unequally spaced, and the projection shape of the second cavities 23141 along the first direction x can be rectangular, but not limited to.

[0106] By using the above scheme, the intermediate layer 2314 of the mounting portion 231 can remove unnecessary solid materials inside through the plurality of second cavities 23141 to reduce the structural weight and the material cost, and the ribs between adjacent two second cavities 23141 can maintain the structural strength, the structural rigidity and the mechanical properties (such as bending stiffness, torsional properties, etc.). In addition, since the number of the second cavities 23141 is greater than the number of the first cavities 23131, the number of the ribs of the intermediate layer 2314 between adjacent two second cavities 23141 is greater than the number of the ribs of the base layer 2313 between adjacent two first cavities 23131, and the strength of the intermediate layer 2314 is greater than the strength of the base layer 2313. Since the intermediate layer 2314 is closer to the external mounting beam 4 than the base layer 2313, the strength of the intermediate layer 2314 is stronger, which is beneficial to improve the overall structural strength and structural reliability of the mounting portion 231, and is beneficial to improve the connection stability and connection reliability between the mounting portion 231 and the external mounting beam 4. Conversely, if the strength of the base layer 2313 is stronger and the strength of the intermediate layer 2314 is weaker, the mounting portion 231 and the external mounting beam 4 can not be fixed firmly.

[0107] Please refer to Figure 5 , Figure 6 , Figure 7 In some embodiments of the present application, the number of the second cavities 23141 is one more than the number of the first cavities 23131.

[0108] By adopting the above scheme, by making the number of the second cavities 23141 more than the number of the first cavities 23131, on the one hand, the number of the ribs of the intermediate layer 2314 can be more than the number of the ribs of the base layer 2313, the strength of the intermediate layer 2314 can be greater than the strength of the base layer 2313, the structural strength and structural reliability of the mounting portion 231 as a whole can be optimized, and the connection stability and connection reliability between the mounting portion 231 and the external mounting beam 4 can be optimized. On the other hand, on the basis of the number of the first cavities 23131, the number of the second cavities 23141 can be balanced and optimized to reduce the risk of excessive difficulty in molding (such as extrusion molding) due to too many second cavities 23141, so that the molding difficulty of the second cavities 23141 can be balanced and reduced on the basis of optimizing the strength, and the molding convenience, molding precision and molding quality of the second cavities 23141 can be balanced and optimized.

[0109] Of course, in other embodiments, the number of the second cavities 23141 can be at least two more than the number of the first cavities 23131.

[0110] Please refer to Figure 4 , Figure 6 , Figure 7 In some embodiments of the present application, the number of the second cavities 23141 is 5.

[0111] Understandably, in the case where the width of the intermediate layer 2314 along the second direction y is constant, the more the number of the second cavities 23141, the smaller the width of the second cavities 23141 along the second direction y, which will result in greater difficulty in molding (such as extrusion molding), and the more the number of the ribs between adjacent two second cavities 23141, which will increase the weight, cost and strength. Therefore, by adopting the above scheme, by making the number of the second cavities 23141 preferably 5, the width of the second cavities 23141 along the second direction y can be moderate to reduce the molding difficulty (such as extrusion molding), so that the machining and molding of the second cavities 23141, the intermediate layer 2314, the mounting portion 231 and the beam body 23 can be facilitated, and the molding convenience, molding precision and molding quality can be improved; the intermediate layer 2314 can have better strength, and the structural weight and material cost can be balancedly reduced.

[0112] Of course, in other embodiments, the number of the second cavities 23141 can be set to other numerical values.

[0113] Please refer to Figure 4 , Figure 6 , Figure 7In some embodiments of the present application, the convex part 232 comprises a second rib 2321 and a third rib 2322 oppositely arranged, the second rib 2321 is arranged on the side of the third rib 2322 close to the recessed space 233, and the mounting part 231 comprises a fourth rib 2315 connected between the second rib 2321 and the third rib 2322. In the direction away from the fourth rib 2315, the second rib 2321 is arranged obliquely to the side close to the third rib 2322.

[0114] It should be noted that the convex part 232 comprises the second rib 2321 and the third rib 2322, and the mounting part 231 comprises the fourth rib 2315. The second rib 2321 and the third rib 2322 are oppositely arranged along the second direction y, and the fourth rib 2315 is arranged extending along the first direction x and the second direction y, and the fourth rib 2315 is connected between the side of the second rib 2321 and the side of the third rib 2322 close to the mounting part 231.

[0115] The third rib 2322 is arranged extending along the first direction x and the third direction z, that is, the third rib 2322 is perpendicular to the fourth rib 2315. The side of the third rib 2322 away from the second rib 2321 is used for abutting cooperation with the battery monomer 10, and the battery monomer 10 will exert a certain expansion force on the third rib 2322 during use of the battery monomer 10.

[0116] The second rib 2321 is arranged on the side of the third rib 2322 close to the recessed space 233, and the second rib 2321 participates in enclosing the recessed space 233. In the direction away from the fourth rib 2315, the second rib 2321 is arranged obliquely to the side close to the third rib 2322, that is, the distance between the second rib 2321 and the third rib 2322 is gradually reduced in the direction away from the fourth rib 2315, that is, the second rib 2321 and the fourth rib 2315 are arranged at an acute angle. The second rib 2321 is arranged extending along the first direction x in an inclined posture.

[0117] Since the side of the third rib 2322 away from the second rib 2321 will abut and cooperate with the battery monomer 10, and the battery monomer 10 will exert a certain expansion force on the third rib 2322 during use, therefore, by adopting the above scheme, the convex part 232 can form an inclined rib supporting the third rib 2322 through the second rib 2321 arranged obliquely to the side close to the third rib 2322 relative to the fourth rib 2315, thereby the strength of the convex part 232 can be enhanced, and the resistance ability (that is, the anti-expansion ability) of the convex part 232 to the transverse (corresponding to the second direction y) expansion force exerted by the battery monomer 10 can be improved.

[0118] As shown in FIG. 2, the convex part 232 comprises a second rib 2321 and a third rib 2322 oppositely arranged, the second rib 2321 is arranged on the side of the third rib 2322 close to the recessed space 233, and the mounting part 231 comprises a fourth rib 2315 connected between the second rib 2321 and the third rib 2322. In the direction away from the fourth rib 2315, the second rib 2321 is arranged obliquely to the side close to the third rib 2322. Figure 4 , Figure 6 , Figure 7As shown in some embodiments, the second rib 2321 and the third rib 2322 are spaced apart from each other away from the side of the mounting portion 231, so that the projection shape (i.e. the outer shape) of the convex portion 232 along the first direction x is similar to a trapezoid. In this way, the hole positions, such as the hole positions for positioning the battery monomer 10, the hole positions for embedding the fixing block, and the like, can be arranged on the side of the convex portion 232 away from the mounting portion 231. In other embodiments, the second rib 2321 and the third rib 2322 abut each other away from the side of the mounting portion 231, so that the projection shape (i.e. the outer shape) of the convex portion 232 along the first direction x is similar to a triangle.

[0119] As shown in some embodiments, the side of the mounting portion 231 along the second direction y also abuts the battery monomer 10. During use, the battery monomer 10 also exerts an expansion force on the mounting portion 231. However, since the strength of the mounting portion 231 is obviously superior to the strength of the convex portion 232, i.e. the mounting portion 231 has sufficient strength to resist the lateral expansion force exerted by the battery monomer 10, the mounting portion 231 does not need to be provided with an inclined rib. Of course, in other embodiments, the mounting portion 231 can be provided with an inclined rib as needed. Figure 4 Figure 6 Figure 7 As shown in some embodiments, the side of the mounting portion 231 along the second direction y also abuts the battery monomer 10. During use, the battery monomer 10 also exerts an expansion force on the mounting portion 231. However, since the strength of the mounting portion 231 is obviously superior to the strength of the convex portion 232, i.e. the mounting portion 231 has sufficient strength to resist the lateral expansion force exerted by the battery monomer 10, the mounting portion 231 does not need to be provided with an inclined rib. Of course, in other embodiments, the mounting portion 231 can be provided with an inclined rib as needed.

[0120] As shown in some embodiments, the side of the mounting portion 231 along the second direction y also abuts the battery monomer 10. During use, the battery monomer 10 also exerts an expansion force on the mounting portion 231. However, since the strength of the mounting portion 231 is obviously superior to the strength of the convex portion 232, i.e. the mounting portion 231 has sufficient strength to resist the lateral expansion force exerted by the battery monomer 10, the mounting portion 231 does not need to be provided with an inclined rib. Of course, in other embodiments, the mounting portion 231 can be provided with an inclined rib as needed. Figure 4 Figure 6 Figure 7 In some embodiments of the present application, the convex portion 232 includes a fifth rib 2323, which is inclinedly connected between the second rib 2321 and the third rib 2322.

[0121] It should be noted that the convex portion 232 includes the fifth rib 2323, which is connected between the second rib 2321 and the third rib 2322, and the fifth rib 2323 is inclinedly arranged relative to the second rib 2321 and the third rib 2322, i.e. the fifth rib 2323 is arranged at an angle with the second rib 2321 and at an angle with the third rib 2322.

[0122] By using the above scheme, the convex portion 232 can form an inclined rib supporting the third rib 2322 through the fifth rib 2323 inclinedly connected between the second rib 2321 and the third rib 2322, thereby enhancing the strength of the convex portion 232 and improving the resistance of the convex portion 232 to the lateral expansion force exerted by the battery monomer 10 (i.e. the anti-expansion force ability).

[0123] As shown in some embodiments, the side of the mounting portion 231 along the second direction y also abuts the battery monomer 10. During use, the battery monomer 10 also exerts an expansion force on the mounting portion 231. However, since the strength of the mounting portion 231 is obviously superior to the strength of the convex portion 232, i.e. the mounting portion 231 has sufficient strength to resist the lateral expansion force exerted by the battery monomer 10, the mounting portion 231 does not need to be provided with an inclined rib. Of course, in other embodiments, the mounting portion 231 can be provided with an inclined rib as needed. Figure 9 Figure 3 Figure 4 In some embodiments of the present application, the angle β between the second rib and the fourth rib is 75° (degrees) to 85°.​​​​​​

[0124] It should be noted that the included angle β between the second rib and the fourth rib is an acute angle, and the angle value of the included angle β between the second rib and the fourth rib is 75°-85°, for example, it can be 75°, 76°, 77°, 78°, 79°, 80°, 81°, 82°, 83°, 84°, 85°, etc.

[0125] Among them, the angle value of the included angle β between the second rib and the fourth rib can be measured directly by a protractor, but not limited to. The measurement steps can refer to: align the center point of the protractor with the intersection point (i.e. the vertex of the included angle) of the second rib 2321 and the fourth rib 2315; adjust the protractor so that the 0° scale line is aligned with the edge of the fourth rib 2315; read the scale value corresponding to the edge of the second rib 2321 to obtain the angle value of the included angle β between the second rib and the fourth rib.

[0126] By adopting the above scheme, the second rib 2321 can be moderately inclined to the side close to the third rib 2322 relative to the fourth rib 2315, the oblique top support effect of the second rib 2321 on the third rib 2322 can be optimized, the strength of the convex part 232 can be optimized, and the resistance ability (i.e. anti-expansion force ability) of the convex part 232 to the lateral expansion force applied by the battery monomer 10 can be optimized. And based on the setting of the present embodiment, the inclined surface of the second rib 2321 towards the recessed space 233 can have a sufficient inclination angle, which can facilitate the instrument to extend into the recessed space 233 without interference and collision, and machine the required hole position (such as the hole position for fixing the connector 53 (such as shown in Figure 6 ) or the transmission wire harness 51, etc.) on the inclined surface of the second rib 2321 towards the recessed space 233.

[0127] Please refer to Figure 10 , Figure 3 , Figure 4 In some embodiments of the present application, the accommodation space 211 is divided into two accommodation cavities 2111 by the beam body 23, and the battery monomer 10 is provided with a plurality of battery monomers 10, which are arranged in the two accommodation cavities 2111.

[0128] It should be noted that the accommodation space 211 is only divided into two accommodation cavities 2111 by the beam body 23, and the two accommodation cavities 2111 are arranged on both sides of the beam body 23 along the second direction y. That is, the longitudinal beam arranged along the second direction y is cancelled in the accommodation space 211, and the transverse beam arranged along the first direction x except the beam body 23.

[0129] The battery monomers 10 are provided in plurality, and all the battery monomers 10 are arranged in two accommodating cavities 2111, so that the battery monomers 10 in the same accommodating cavity 2111 can be conveniently arranged to form a required electrical connection relationship and form a battery monomer assembly (i.e., grouping), and the battery monomer assemblies arranged in two accommodating cavities 2111 can be conveniently arranged to form a required electrical connection relationship, which can be series connection or parallel connection or mixed connection, and the mixed connection refers to both series connection and parallel connection.

[0130] By adopting the above scheme, the accommodating space 211 is divided into two accommodating cavities 2111 by the beam body 23, so that all the battery monomers 10 are arranged in two accommodating cavities 2111. Based on this, the longitudinal beam extending along the second direction y can be cancelled, and other transverse beams extending along the first direction x except the beam body 23, so that the space required by the longitudinal beam and other transverse beams can be saved, the gap space required to be reserved between the beam and the battery monomer 10 can be saved, more battery monomers 10 can be accommodated, the battery monomers 10 in the same accommodating cavity 2111 can be conveniently arranged to form a required electrical connection relationship and form a battery monomer assembly, and the battery monomer assemblies arranged in two accommodating cavities 2111 can be conveniently arranged to form a required electrical connection relationship, the space required by the battery monomers 10 to form the electrical connection relationship can be saved, so that the space utilization and energy density of the battery device 1 can be improved. Moreover, since the middle anti-collision beam assembly composed of the beam body 23, the recess 222 and the external mounting beam 4 can maintain the anti-collision ability of the battery device 1 and the electric device in a side collision accident, and since the anti-collision beam at the front of the electric device such as a vehicle can be used to maintain the anti-collision ability of the battery device 1 and the electric device in a head-on collision accident, the cancellation of the longitudinal beam basically does not affect the anti-collision ability of the battery device 1 and the electric device in a collision accident. Moreover, as shown in Figure 4 It can be seen from the sweep simulation that the response is split into two regions, which greatly improves the design product frequency, that is, based on the arrangement of the present embodiment, the battery device 1 of the present embodiment is less likely to resonate with external excitation (such as road bumping frequency when the vehicle is running, vibration frequency when the equipment is running), which can reduce the risk of amplifying the vibration amplitude due to resonance, causing structural fatigue, component loosening, structural damage, and performance failure, and can optimize the anti-vibration ability, use reliability and service life of the battery device 1.

[0131] Please refer to Figure 3 , Figure 4In some embodiments of the present application, the plurality of battery cells 10 includes a first battery cell 10a and a second battery cell 10b, which are arranged in two accommodating cavities 2111. The battery device 1 further includes a current transmission piece 40, and the electrode terminals of the first battery cell 10a and the second battery cell 10b are welded with the same current transmission piece 40 respectively, and the electrode terminals of the first battery cell 10a, the electrode terminals of the second battery cell 10b and the current transmission piece 40 are made of the same material.

[0132] It should be noted that the first battery cell 10a and the second battery cell 10b are two battery cells 10 arranged in two accommodating cavities 2111 and need to be connected in series, and the first battery cell 10a and the second battery cell 10b can be provided in one or more groups.

[0133] The electrode terminals of the first battery cell 10a and the second battery cell 10b are directly welded (for example, laser welding) with the same current transmission piece 40 respectively, so as to realize the series connection through the same current transmission piece 40. In order to enable the current transmission piece 40 to be directly welded with the electrode terminals of the first battery cell 10a and the electrode terminals of the second battery cell 10b respectively, the material of the current transmission piece 40, the material of the electrode terminals of the first battery cell 10a and the material of the electrode terminals of the second battery cell 10b are the same. For example, the materials of the electrode terminals of the first battery cell 10a and the electrode terminals of the second battery cell 10b are both aluminum, that is, the electrode terminals of the first battery cell 10a and the electrode terminals of the second battery cell 10b are both aluminum poles, and the current transmission piece 40 is an aluminum bar. In some embodiments, the aluminum bar can be made of 1060 aluminum alloy, and the material state can be H24 (semi-hard state).

[0134] If the materials of the electrode terminals of the battery cell 10 and the current transmission piece 40 connected thereto are different (for example, the electrode terminals are aluminum poles and the current transmission piece 40 is a copper bar), the electrode terminals and the current transmission piece 40 with different materials cannot be directly welded and need to be connected by bolts, resulting in that the electrode terminals of the two battery cells 10 need to be connected in series through 2 insulating protection bases, 2 fixing bolts, 2 insulating protection covers and 1 current transmission piece 40 and other cumbersome components. In comparison, by using the above scheme, the electrode terminals of the first battery cell 10a and the electrode terminals of the second battery cell 10b can be directly welded with the same current transmission piece 40 with the same material respectively, so as to conveniently, quickly and reliably realize the series connection, and each group of the electrode terminals of the first battery cell 10a, the current transmission piece 40 and the electrode terminals of the second battery cell 10b can correspondingly omit 2 insulating protection bases, 2 fixing bolts and 2 insulating protection covers, so as to effectively reduce the number of components, effectively simplify the structure and effectively reduce the cost. For example, as shown inFigure 6 As shown, in some embodiments, the electrode terminals of the first battery cell 10a, the current transmission piece 40 and the electrode terminals of the second battery cell 10b are provided with 6 groups, and 12 insulating protection bases, 12 fixing bolts and 12 insulating protection covers can be omitted.

[0135] Please refer to Figure 9 , Figure 6 , Figure 9 , Figure 3 In some embodiments of the present application, the battery device 1 comprises a signal transmission assembly 50, part of the signal transmission assembly 50 is arranged in the recessed space 233, the signal transmission assembly 50 comprises a transmission wire harness 51, a flexible circuit board 52 and a connector 53, the flexible circuit board 52 is electrically connected with the battery cell 10, the transmission wire harness 51 is electrically connected with the flexible circuit board 52 via the connector 53, and the connector 53 is arranged between the convex part 232 and the concave part 222.

[0136] It should be noted that the signal transmission assembly 50 is a signal transmission assembly which is partially arranged in the recessed space 233 (i.e. needs to be wired from the recessed space 233). Of course, in some embodiments, the battery device 1 can comprise other signal transmission assemblies which do not need to be wired from the recessed space 233.

[0137] The signal transmission assembly 50 comprises the transmission wire harness 51, the flexible circuit board 52 and the connector 53. The flexible circuit board 52 is electrically connected with the battery cell 10 arranged adjacent to the beam body 23, part of the flexible circuit board 52 is overlapped on the convex part 232 and extends between the convex part 232 and the concave part 222; part of the transmission wire harness 51 extends between the convex part 232 and the concave part 222 and is electrically connected with the flexible circuit board 52 via the connector 53 arranged between the convex part 232 and the concave part 222; the other part of the transmission wire harness 51 can pass out of the recessed space 233 from the end side of the first direction x of the recessed space 233, and then be wired and connected to the battery management unit (BMU). The signal transmission assembly 50 is used to realize the communication connection between the battery cell 10 and the battery management unit. The connector 53 is an electrical connection component between the flexible circuit board 52 and the transmission wire harness 51, and the connector 53 can be a plug or a socket structure. Figure 4 , Figure 6 As shown, in some embodiments, the flexible circuit board 52 can be pressed and fixed to the convex part 232 via the fixing plate 60, so as to reduce the shaking and movement of the flexible circuit board 52, and reduce the mutual friction between the flexible circuit board 52 and the cover body 22 and between the flexible circuit board 52 and the beam body 23, thereby reducing the abrasion of the flexible circuit board 52 and improving the use reliability and service life of the flexible circuit board 52, wherein the fixing plate 60 can be but is not limited to an epoxy plate.

[0138] By adopting the above scheme, for the signal transmission assembly 50 which needs to be wired from the recessed space 233, the connector 53 can be obliquely inserted and arranged in the space between the convex part 232 and the recessed part 222, and the transmission wire harness 51 can be electrically connected with the flexible circuit board 52 through the connector 53 in the space between the convex part 232 and the recessed part 222. Based on this, while meeting the effective electrical connection, the space occupation of the connector 53 and the signal transmission assembly 50 between the convex part 232 and the main body part 221 can be reduced, the space occupation of the connector 53 and the signal transmission assembly 50 between the mounting part 231 and the recessed part 222 can be reduced, and the assembly interference between the connector 53 and the cover 22 can be reduced, so that the layout can be optimized and compacted, the space utilization rate can be improved, the risk of narrowing the space outside the recessed part 222 away from the beam 23 due to the connector 53 and the signal transmission assembly 50 can be reduced, the space outside the recessed part 222 away from the beam 23 can be maintained and increased, the external mounting beam 4 can be more easily arranged in the space outside the recessed part 222 away from the beam 23 and connected with the recessed part 222 and the mounting part 231, and the core design of “connecting through the mounting part 231 and the recessed part 222 which are both in the shape of a U-shaped structure, so that the mounting height of the battery device 1 is lowered relative to the total height of the battery device 1” can be compatible.

[0139] Please refer to Figure 9 、 Figure 4 、 Figure 6 、 Figure 9 In some embodiments of the present application, the recessed part 222 includes a mounting section 2221 and a bent section 2222, the mounting section 2221 is used for connecting with the external mounting beam 4, and the bent section 2222 is bently connected between the main body part 221 and the mounting section 2221. The connector 53 is arranged between the convex part 232 and the bent section 2222, and the bent section 2222 is at least outwardly protrudingly provided with a convex rib 22221 corresponding to part of the connector 53.

[0140] It should be noted that the recessed part 222 includes the mounting section 2221 and the bent section 2222. The mounting section 2221 is part of the recessed part 222 which is mounted on the external mounting beam 4 together with the mounting part 231, and the bent section 2222 is part of the recessed part 222 which is bently connected between the main body part 221 and the mounting section 2221 and arranged on the same side as the connector 53. Among the two sides of the recessed part 222 along the second direction y, if only one side is provided with the connector 53, the recessed part 222 includes one bent section 2222; if both sides are provided with the connector 53, the recessed part 222 includes two bent sections 2222, and the two bent sections 2222 are arranged on the two sides of the mounting section 2221 along the second direction y. That is, the recessed part 222 can be a non-symmetrical structure.

[0141] The connector 53 is arranged in the space between the protrusion 232 and the bent segment 2222. The portion of the bent segment 2222 corresponding to the connector 53 is outwardly protruding and provided with a protruding rib 22221, so as to provide sufficient accommodation space for the connector 53 and the transmission wire harness 51 through the space between the protruding rib 22221 and the protrusion 232.

[0142] By adopting the above scheme, in the case that the connector 53 is arranged in the space between the protrusion 232 and the bent segment 2222, the portion of the bent segment 2222 corresponding to the connector 53 is outwardly protruding and provided with a protruding rib 22221, so as to provide sufficient accommodation space for the connector 53 and the transmission wire harness 51 through the space between the protruding rib 22221 and the protrusion 232, thereby being compatible with the oblique insertion design of the connector 53 and reducing the assembly interference between the connector 53 and the bent segment 2222. On this basis, the remaining portion of the bent segment 2222 can not be outwardly protruding, that is, the space between the remaining portion of the bent segment 2222 and the protrusion 232 can not be large, based on which the space on the outer side of the beam body 23 away from the recess 222 can be maintained and increased, so as to facilitate the external mounting beam 4 to enter the space on the outer side of the beam body 23 away from the recess 222 more and connect with the mounting segment 2221 and the mounting portion 231, thereby being beneficial to improving the overall stability, anti-shaking and anti-overturning capability, middle strength and overall strength of the battery device 1.

[0143] Please refer to Figure 3 , Figure 6 , Figure 7 In some embodiments of the present application, one side of the mounting portion 231 facing the recessed space 233 is provided with two avoiding grooves 2316, and the two avoiding grooves 2316 are arranged at two ends of the mounting portion 231 along the first direction x, and part of the transmission wire harness 51 is accommodated in the avoiding grooves 2316.

[0144] It should be noted that the avoiding grooves 2316 are arranged on the side of the mounting portion 231 facing the recessed space 233, and the avoiding grooves 2316 are two, and the two avoiding grooves 2316 are arranged at two ends of the mounting portion 231 along the first direction x, and the shape and size of the avoiding grooves 2316 can be set as required. The part of the transmission wire harness 51 passing through the avoiding grooves 2316 is accommodated in the avoiding grooves 2316.

[0145] Since part of the transmission line bundle 51 needs to pass out of the recessed space 233 from the end side along the first direction x, and then be wired and connected to the battery management unit, especially in the case where multiple signal transmission assemblies 50 are provided, the transmission line bundles 51 of multiple signal transmission assemblies 50 will be gathered together and wired again at the end side of the recessed space 233 along the first direction x, resulting in that the transmission line bundle 51 will be thicker due to the concentration and gathering at the end side of the recessed space 233 along the first direction x, which can interfere with the recessed portion 222. Thus, by adopting the above scheme, the wiring of the transmission line bundle 51 can be accommodated in the avoidance groove 2316 by sinking through the part of the avoidance groove 2316 at the end side of the recessed space 233 along the first direction x, so as to reduce the assembly interference between the transmission line bundle 51 and the recessed portion 222, and facilitate the wiring layout of the transmission line bundle 51.

[0146] Please refer to Figure 3 、 Figure 6 、 Figure 7 In some embodiments of the present application, the beam body 23 is arranged in axial symmetry about the symmetry plane 234 which is a plane perpendicular to the second direction y and located at the center of the beam body 23 along the second direction y.

[0147] It should be noted that the symmetry plane 234 is a plane perpendicular to the second direction y and located at the center of the beam body 23 along the second direction y. The beam body 23 is arranged in axial symmetry about the symmetry plane 234, i.e., the beam body 23 is an axially symmetric structure.

[0148] By adopting the above scheme, the structure and size of the beam body 23 on both sides of the symmetry plane 234 can be completely consistent. Based on this, during assembly, the beam body 23 can be fitted and installed with the frame 21 regardless of whether it is assembled in a “forward attitude” or a “reverse attitude” (the reverse attitude is the attitude of the beam body 23 after being flipped along the symmetry plane 234 from the original forward attitude). Thus, the directional installation requirement of the beam body 23 can be reduced, the assembly error rate of the beam body 23 can be reduced, the assembly fault tolerance and efficiency of the beam body 23 can be improved, and the production foolproofing problem can be solved to a certain extent.

[0149] Of course, in other embodiments, the beam body 23 can be a non-axially symmetric structure.

[0150] Please refer to Figure 2 、 Figure 3 、 Figure 4 In some embodiments of the present application, the width d2 of the beam body along the second direction is 160mm-200mm.

[0151] It should be noted that the width d2 of the beam body along the second direction is 160mm-200mm, for example, it can be 160mm, 165mm, 170mm, 175mm, 180mm, 185mm, 190mm, 195mm, 200mm, etc. For example, in some embodiments, the width d2 of the beam body along the second direction is about 187.5mm.

[0152] The existing battery device usually has a beam with a rectangular shape and a width of about 20-30mm, and the impact resistance and collision resistance of the beam of the existing battery device are weak. Compared with the existing battery device, by adopting the above scheme, the width d2 of the beam body along the second direction can reach 160mm-200mm based on the formation of the "U"-shaped structure of the beam body 23 based on the mounting part 231 and the two convex parts 232. Based on this, the structural strength and rigidity of the beam body 23 can be greatly strengthened, and the middle strength and overall strength of the battery device 1 can be optimized and improved, and the collision resistance of the battery device 1 in a collision accident (especially a side collision accident) can be optimized.

[0153] Please refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 1 , Figure 2 , Figure 6 , and in combination with some embodiments described above, the present embodiment provides a specific example of a battery device 1. The battery device 1 includes a box body 20, a plurality of battery monomers 10 arranged in the box body 20, a mounting part 30, a current transmission part 40, and a signal transmission assembly 50.

[0154] The box body 20 includes a frame 21, a cover body 22, and a beam body 23. The frame 21 forms an accommodation space 211. The cover body 22 is arranged on one side of the frame 21. The beam body 23 is arranged in the accommodation space 211 along the first direction x, and the two ends of the beam body 23 along the first direction x are connected to the frame 21, respectively. The beam body 23 is located in the middle of the frame 21 along the second direction y, and the width d2 of the beam body along the second direction is 187.5mm. The beam body 23 is arranged symmetrically about the plane 234 perpendicular to the second direction y as a symmetry plane. The accommodation space 211 is divided into two accommodation cavities 2111 only by the beam body 23, and the plurality of battery monomers 10 are arranged in the two accommodation cavities 2111. The second direction y is perpendicular to the first direction x.

[0155] The beam body 23 comprises a mounting portion 231 and two protruding portions 232, the two protruding portions 232 are arranged on the side of the mounting portion 231 facing the cover body 22, and are arranged on both sides of the mounting portion 231 along the second direction y, and a recessed space 233 is formed between the mounting portion 231 and the two protruding portions 232. The cover body 22 comprises a main body portion 221 and a recessed portion 222, the recessed portion 222 is recessed relative to the main body portion 221 towards the mounting portion 231, and at least partially located in the recessed space 233. The recessed portion 222 comprises a mounting segment 2221 and a bent segment 2222, the bent segment 2222 is bently connected between the main body portion 221 and the mounting segment 2221. The mounting member 30 is arranged along the third direction z and penetrates the mounting segment 2221 and the mounting portion 231. The mounting segment 2221 and the mounting portion 231 are jointly mounted on the external mounting beam 4 through the mounting member 30. Wherein, the mounting member 30 is a sleeve, the mounting member 30 comprises a bottom bolt 32, a bottom sleeve 33, a top sleeve 34 and a top bolt 35 arranged in sequence along the third direction z, the bottom sleeve 33 and the top sleeve 34 are sleeved and matched and jointly penetrate the recessed portion 222 and the mounting portion 231, the bottom bolt 32 is tightly fixed on one end of the bottom sleeve 33 away from the top sleeve 34, the top bolt 35 is tightly fixed on one end of the top sleeve 34 away from the bottom sleeve 33, the mounting member 30 has a mounting hole 31 penetrating the bottom bolt 32, the bottom sleeve 33, the top sleeve 34 and the top bolt 35 along the third direction z, and the mounting member 30 is connected with the external mounting beam 4 through a fastener (such as a bolt) penetrating the mounting hole 31. Wherein, along the third direction z, the total height of the battery device 1 is H, the height from the end face of the mounting member 30 close to the main body portion 221 to the main body portion 221 is h, h is about 1 / 3H. Wherein, the third direction z is perpendicular to the first direction x and the second direction y. Based on this, the mounting height of the battery device 1 can be reduced, so that the mounting height of the battery device 1 is lowered by a certain distance relative to the total height of the battery device 1, thereby effectively improving the overall stability, anti-shaking and anti-overturning capability of the battery device 1. Moreover, the beam body 23, the recessed portion 222 and the external mounting beam 4 can jointly form a middle anti-collision beam assembly, thereby effectively improving the middle strength and overall strength of the battery device 1, optimizing the anti-collision capability of the battery device 1 in a collision accident (especially a side collision accident), reducing the side collision weak area, and reducing the risk of deformation, damage and affecting normal use or even causing an accident of the battery device 1 in a collision accident (especially a side collision accident). Moreover, the Z-direction stiffness can be significantly improved, the Z-direction main frequency and resonance main frequency of the battery device 1 can be significantly improved, the Z-direction main frequency of the battery device 1 can be above 50Hz (in a specific example, about 57Hz), thereby the battery device 1 is less likely to resonate with external excitation (such as road bump frequency when the vehicle is running, equipment operation vibration frequency), the risk of structure fatigue, component loosening, structure damage, performance failure caused by amplified vibration amplitude due to resonance can be reduced, and the anti-vibration capability, use reliability and service life can be improved.

[0156] The mounting portion 231 comprises a base layer 2313, and an intermediate layer 2314 arranged between the base layer 2313 and the convex portion 232. The base layer 2313 is provided with four first cavities 23131 arranged through along the first direction x and arranged at intervals along the second direction y. The intermediate layer 2314 is provided with five second cavities 23141 arranged through along the first direction x and arranged at intervals along the second direction y. In this way, the structural weight and material cost can be reduced, while the structural strength, structural rigidity, and mechanical properties (such as bending stiffness and torsional properties) are maintained, and the difficulty of molding (such as extrusion molding) is reduced.

[0157] The base layer 2313 has a first rib 2311 extending along the first direction x at the middle portion along the second direction y, and the thickness d1 of the first rib along the second direction is 3.5 mm. The first rib 2311 is provided with a through hole 2312 at a position corresponding to the mounting piece 30, and the bottom sleeve 33 comprises a waist-shaped portion 331 penetrating through the through hole 2312, and the outer circumferential surface of the waist-shaped portion 331 has two opposite first planes 3311, which are respectively in abutting engagement with the first rib 2311 to limit the rotation of the waist-shaped portion 331 and the bottom sleeve 33 in the through hole 2312. In this way, the anti-rotation design of the waist-shaped portion 331, the bottom sleeve 33, and the mounting piece 30 can be achieved, and the rotation of the waist-shaped portion 331, the bottom sleeve 33, and the mounting piece 30 during assembly can be solved, and the risk of insecure or loose locking, poor air tightness, and insufficient strength due to the deflection of the waist-shaped portion 331, the bottom sleeve 33, and the mounting piece 30 during assembly can be reduced.

[0158] The convex portion 232 comprises a second rib 2321 and a third rib 2322 arranged oppositely, and the second rib 2321 is arranged on the side of the third rib 2322 close to the recessed space 233. The intermediate layer 2314 of the mounting portion 231 comprises a fourth rib 2315 connected between the second rib 2321 and the third rib 2322. The second rib 2321 is arranged obliquely relative to the fourth rib 2315 towards the side close to the third rib 2322, and the included angle β between the second rib and the fourth rib is 80°. The convex portion 232 further comprises a fifth rib 2323 obliquely connected between the second rib 2321 and the third rib 2322. In this way, the strength of the convex portion 232 can be enhanced, and the resistance to the lateral expansion force (i.e., the anti-expansion force) applied by the convex portion 232 to the battery monomer 10 can be improved.

[0159] The first battery cell 10a and the second battery cell 10b are two battery cells 10 disposed in two separate receiving cavities 2111 and connected in series. The electrode terminals of the first battery cell 10a, the electrode terminals of the second battery cell 10b, and the current transmission element 40 are all made of the same material, aluminum. The electrode terminals of the first battery cell 10a and the electrode terminals of the second battery cell 10b are each welded to the same current transmission element 40 to achieve a series connection. Based on this, a series connection can be achieved with a simplified structure, which can effectively reduce the number of parts, simplify the structure, and reduce costs.

[0160] A portion of the signal transmission component 50 is disposed within the recessed space 233, meaning the signal transmission component 50 must be routed through the recessed space 233. The signal transmission component 50 includes a transmission harness 51, a flexible circuit board 52, and a connector 53. The flexible circuit board 52 is electrically connected to the battery cell 10 arranged adjacent to the beam 23. A portion of the flexible circuit board 52 overlaps the protrusion 232 and extends between the protrusion 232 and the bend 2222. A portion of the transmission harness 51 extends between the protrusion 232 and the bend 2222, and is electrically connected to the flexible circuit board 52 via the connector 53, which is obliquely positioned between the protrusion 232 and the bend 2222. Another portion of the transmission harness 51 can exit the recessed space 233 from its end side along the first direction x, and then route and connect to the battery management unit. The signal transmission component 50 is used to enable communication between the battery cell 10 and the battery management unit. Among them, the bent section 2222 at least corresponds to the portion of connector 53 with a protruding rib 22221. Based on this, while ensuring effective electrical connection, the space occupied by connector 53 and signal transmission component 50 between the protrusion 232 and the main body 221 is reduced, the space occupied by connector 53 and signal transmission component 50 between the mounting part 231 and the recess 222 is reduced, and the assembly interference between connector 53 and cover 22 is reduced. This allows for an optimized and compact layout, improves space utilization, reduces the risk of the outer space of the recess 222 facing away from beam 23 being restricted by connector 53 and signal transmission component 50, maintains and increases the outer space of the recess 222 facing away from beam 23, and facilitates the external mounting beam 4 to enter more of the outer space of the recess 222 facing away from beam 23 and connect with the recess 222 and mounting part 231. This is beneficial to improving the overall stability, anti-shaking and anti-overturning ability, central strength and overall strength of battery device 1.

[0161] The mounting portion 231 has two clearance slots 2316 on the side facing the recessed space 233, and the two clearance slots 2316 are respectively located at both ends of the mounting portion 231 along the first direction x. The portion of the transmission harness 51 that passes through the clearance slot 2316 is recessed and accommodated in the clearance slot 2316. Based on this, the assembly interference between the transmission harness 51 and the recess 222 can be reduced, and the routing layout of the transmission harness 51 can be facilitated.

[0162] Please refer to ​ , ​ , ​ Some embodiments of the present application provide a power consuming device, comprising an external mounting beam 4 and a battery device 1 provided by embodiments of the present application, wherein the recess 222 and the mounting portion 231 of the battery device 1 are jointly mounted on the external mounting beam 4.

[0163] By using the above scheme, the power consuming device can improve the anti-collision ability (especially the anti-side collision ability), the use performance, the use reliability and the use life of the power consuming device by applying the battery device 1 provided by embodiments of the present application.

[0164] The above merely provides optional embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made by those skilled in the art to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A battery device, characterized in that, The enclosure includes a housing and individual battery cells disposed within the housing. The housing includes: A framework, enclosing and forming a space; A cover that fits onto one side of the frame; A beam extends along a first direction and is disposed within the receiving space. The two ends of the beam along the first direction are respectively connected to the frame. The beam is located in the middle of the frame along a second direction, which is perpendicular to the first direction. The beam includes a mounting portion and two protrusions. The two protrusions are located on the side of the mounting portion facing the cover and are respectively located on both sides of the mounting portion along the second direction. A recessed space is formed between the mounting portion and the two protrusions. The cover includes a main body and a recess. The recess is recessed relative to the main body towards the mounting portion and is at least partially located in the recessed space. The recess and the mounting portion are jointly mounted on an external mounting beam.

2. The battery device as claimed in claim 1, characterized in that, The battery device includes a mounting member that extends along a third direction and passes through and connects the recess and the mounting portion. The mounting member is used to connect with the external mounting beam, and the third direction is perpendicular to the first direction and the second direction.

3. The battery device as claimed in claim 2, characterized in that, Along the third direction, the total height of the battery device is H, and the height from the end face of the mounting member near the main body to the main body is h, where 1 / 4H ≤ h ≤ 1 / 2H.

4. The battery device as claimed in claim 2, characterized in that, The mounting part has a first rib extending along the first direction at its middle part along the second direction, and the first rib has a through hole at the position corresponding to the mounting part. The mounting component includes a waist-shaped portion that passes through the through hole. The outer peripheral surface of the waist-shaped portion has two opposing first planes. The two first planes respectively abut against the first rib to restrict the waist-shaped portion from rotating in the through hole.

5. The battery device as claimed in claim 4, characterized in that, The thickness of the first rib along the second direction is 2mm to 4mm.

6. The battery device as claimed in claim 1, characterized in that, The mounting portion includes a base layer and an intermediate layer disposed between the base layer and the protrusion. The base layer has a plurality of first cavities that are disposed through the first direction and spaced apart along the second direction.

7. The battery device as claimed in claim 6, characterized in that, The intermediate layer is provided with a plurality of second cavities that are arranged through the first direction and spaced apart along the second direction, wherein the number of second cavities is greater than the number of first cavities.

8. The battery device according to any one of claims 1-7, characterized in that, The protrusion includes a second rib and a third rib disposed opposite to each other. The second rib is disposed on the side of the third rib near the recessed space. The mounting part includes a fourth rib connected between the second rib and the third rib. Along the direction away from the fourth rib, the second rib is inclined towards the side near the third rib.

9. The battery device as claimed in claim 8, characterized in that, The protrusion includes a fifth rib, which is obliquely connected between the second rib and the third rib.

10. The battery device according to any one of claims 1-7, characterized in that, The accommodating space is divided into two accommodating cavities by the beam, and multiple battery cells are provided, with the multiple battery cells being disposed in the two accommodating cavities.

11. The battery device as claimed in claim 10, characterized in that, The plurality of battery cells include a first battery cell and a second battery cell, which are disposed in two separate cavities. The battery device also includes a current transmission element, wherein the electrode terminals of the first battery cell and the electrode terminals of the second battery cell are respectively welded to the same current transmission element, and the electrode terminals of the first battery cell, the electrode terminals of the second battery cell, and the current transmission element are made of the same material.

12. The battery device as claimed in claim 10, characterized in that, The battery device includes a signal transmission component, a portion of which is disposed in the recessed space. The signal transmission component includes a transmission harness, a flexible circuit board, and a connector. The flexible circuit board is electrically connected to the battery cell, and the transmission harness is electrically connected to the flexible circuit board via the connector, which is disposed between the protrusion and the recess.

13. The battery device as claimed in claim 12, characterized in that, The recess includes a mounting section and a bending section. The mounting section is used to connect with the external mounting beam. The bending section is bent and connected between the main body and the mounting section. The connector is located between the protrusion and the bending section. The bending section has a rib protruding outward at least in the portion corresponding to the connector.

14. The battery device as claimed in claim 12, characterized in that, The mounting part has two clearance slots on the side facing the recessed space. The two clearance slots are respectively located at both ends of the mounting part along the first direction, and part of the transmission harness is accommodated in the clearance slots.

15. The battery device according to any one of claims 1-7, characterized in that, With a plane perpendicular to the second direction as the plane of symmetry, the beam is arranged axially symmetrically about the plane of symmetry.

16. The battery device according to any one of claims 1-7, characterized in that, The width of the beam along the second direction is 160mm~200mm.

17. An electrical device, characterized in that, It includes an external mounting beam and a battery device as described in any one of claims 1-16, wherein the recess and mounting portion of the battery device are jointly mounted on the external mounting beam.

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