Battery device, battery case, electric device, and vehicle

Abstract

The present application relates to the technical field of batteries, and provides a battery device, a battery case, an electric device, and a vehicle. The battery case comprises a case body, a first cross beam, and a first load-bearing member. An accommodating cavity is formed in the case body, the first cross beam is arranged in the case body to divide the accommodating cavity into a battery cavity and an anti-collision cavity, and the first load-bearing member is arranged in the anti-collision cavity and supportively connected between the first cross beam and the case body. By providing a first load-bearing member in an anti-collision cavity, the anti-collision performance of the battery device is improved.

Description

Battery device, battery box, electric device and vehicle

[0001] Cross-reference to related applications

[0002] This application refers to the Chinese Patent Application No. 202410992916.3, filed on July 23, 2024, entitled “Battery device, battery box, electric device and vehicle”, which is incorporated by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery, in particular to a battery device, a battery box, an electric device and a vehicle. BACKGROUND

[0004] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0005] At present, the demand for battery energy density and weight reduction is increasing, and higher structural strength is required for the battery. Some vehicle models need the battery to withstand impact collision force. Therefore, the battery needs to be designed with anti-collision structure to cope with various collision conditions and improve the safety of the battery. SUMMARY

[0006] The present application aims to at least solve one of the technical problems in the background art. To this end, one object of the present application is to provide a battery device, a battery box, an electric device and a vehicle to improve the anti-collision performance of the battery.

[0007] An embodiment of the first aspect of the present application provides a battery device, comprising: a battery box and a battery cell. The battery box comprises: a box body, a first cross beam and a first force bearing member. The box body has an accommodating cavity formed therein, the first cross beam is arranged in the box body to divide the accommodating cavity into a battery cavity and an anti-collision cavity, the first force bearing member is arranged in the anti-collision cavity and is supported and connected between the first cross beam and the box body.

[0008] In the technical solution of the embodiment of the present application, the first force bearing member is arranged in the anti-collision cavity, and the box body is supported from the inside of the anti-collision cavity by the first force bearing member under the cooperation of the first cross beam, which improves the strength of the box body and reduces the stress deformation of the box body towards the side of the battery cell, thereby reducing the phenomenon of the battery cell being extruded in the battery cavity. In other words, the anti-collision performance of the battery device is improved by strengthening the structural strength of the box body, and accordingly, the safety of the battery device is improved.

[0009] In some embodiments, the first force bearing member has a first end connected with the box body and a second end connected with the first cross beam, and the maximum width of the first end is less than the maximum width of the second end in the extension direction of the first cross beam in the horizontal plane. The size of the first end of the first force bearing member is set to be less than the size of the second end, which improves the structural strength of the first force bearing member, and at the same time, improves the reliability of the support of the first cross beam to the first force bearing member, and further improves the reliability of the support of the first force bearing member to the box body.

[0010] In some embodiments, the first force bearing member includes a force receiving portion, which includes a first force receiving portion and a second force receiving portion connected with the first cross beam respectively, and the first force receiving portion and the second force receiving portion are arranged in a spaced manner in the horizontal plane. The first force receiving portion and the second force receiving portion arranged in a spaced manner can form the second end with a larger size on the first force bearing member, and also facilitate the weight reduction of the first force bearing member.

[0011] In some embodiments, the first force bearing member further includes a connecting portion connected with the box body, and the first force receiving portion and the second force receiving portion are connected with the connecting portion at one end away from the first cross beam, and the first force receiving portion and the second force receiving portion are arranged at an angle in the horizontal plane. The first force receiving portion and the second force receiving portion can support the box body from two different directions, which improves the reliability and comprehensiveness of the support, so as to facilitate the box body to better support the collision impact from multiple different directions.

[0012] In some embodiments, the top surface of the connecting portion is higher than the top surface of the force receiving portion in the vertical direction. By reducing the height of the force receiving portion in the vertical direction, the arrangement space above the force receiving portion is increased, which saves the arrangement space in the box body, and facilitates the arrangement of other components in the box body.

[0013] In some embodiments, the first force bearing member further includes a buffer portion arranged between the force receiving portion and the connecting portion, and the top surface of the buffer portion is a slope surface intersecting with the horizontal plane, one end of the slope surface is connected with the top surface of the connecting portion, and the other end of the slope surface is connected with the top surface of the force receiving portion. The slope surface is arranged to facilitate the collapse of the buffer portion when subjected to a larger collision impact, so as to absorb the energy of the collision impact as much as possible, and further reduce the impact on the battery monomer.

[0014] In some embodiments, the first force receiving portion is connected with the first cross beam perpendicularly in the horizontal plane. Then, when subjected to a collision impact in a direction perpendicular to the first cross beam, the first force receiving portion can better support the box body.

[0015] In some embodiments, the box body comprises a first side beam, a second side beam and a connecting beam. The second side beam is perpendicular to the first side beam, and the two ends of the connecting beam are connected to the first side beam and the second side beam respectively, and the first side beam, the second side beam, the connecting beam and the first cross beam jointly define an anti-collision cavity. The second force receiving part is arranged perpendicularly to the connecting beam, so that the second force receiving part can support the connecting beam along the extension direction of the force receiving path when the connecting beam is subjected to a collision impact perpendicular to the extension direction of the connecting beam.

[0016] In some embodiments, the acute angle formed by the connecting beam and the first side beam in the horizontal plane is 45 degrees. In the case that the second force receiving part supports the connecting beam perpendicularly, the 45-degree collision resistance performance of the battery device is improved.

[0017] In some embodiments, the first force receiving part comprises a panel and a reinforcing structure located on the side of the panel facing the bottom of the box body. The panel and the reinforcing structure are integrally pressure cast. The overall structural strength of the first force receiving part is improved.

[0018] In some embodiments, the reinforcing structure comprises a plurality of reinforcing ribs arranged in a staggered manner, and at least one hollow area is formed between the reinforcing ribs. The plurality of reinforcing ribs arranged in a staggered manner improves the overall structural strength of the first force receiving part, and the hollow area formed between the reinforcing ribs facilitates the weight reduction of the first force receiving part.

[0019] In some embodiments, the battery box further comprises a second force receiving part, the two ends of the second force receiving part are connected to the first cross beam and the second side beam respectively, and the second force receiving part is perpendicular to the first cross beam. The second force receiving part supports the second side beam, further improving the overall structural strength of the battery box.

[0020] In some embodiments, the battery box further comprises a second cross beam arranged in the battery cavity, the second cross beam is parallel to the first cross beam, and the two ends of the second cross beam are connected to the box body. The second cross beam supports the box body, improving the side collision resistance performance of the battery device.

[0021] In some embodiments, the second cross beam comprises a main beam and a connecting end portion located at both ends of the main beam, the top surface of the connecting end portion is lower than the top surface of the main beam, so that a first avoiding space is formed between the main beam and the box body. The assembly requirements of the cooling pipeline can be met, and the interference phenomenon in the assembly process can be reduced.

[0022] In some embodiments, the battery box further comprises a third cross beam arranged in the battery cavity, the third cross beam comprises a first sub-beam and a second sub-beam which are detachably connected to each other in the vertical direction, and at least one of the first sub-beam and the second sub-beam is connected to the box body. By adding the third cross beam, the side collision resistance performance of the battery device is further improved, and the two-part structure of the third cross beam is beneficial to improving the efficiency of the battery monomer assembly.

[0023] In some embodiments, the box body comprises two first side beams arranged in parallel and at intervals, two ends of the first sub-beam are connected with the two first side beams respectively, and the second sub-beam is formed with a receiving groove towards one side of the first sub-beam to accommodate the first sub-beam. By arranging the receiving groove on the second sub-beam, the assembly between the second sub-beam and the first sub-beam is facilitated, and the stability and reliability of the second sub-beam after assembly are improved.

[0024] In some embodiments, at least one of the two ends of the second sub-beam is arranged at intervals with the corresponding first side beam, and a second avoiding space is formed between the one end of the second sub-beam and the corresponding first side beam, which is used to avoid the components in the battery cavity. The arrangement requirement of the cooling pipeline can be met, and the interference phenomenon of the cooling pipeline in the assembly process can be reduced.

[0025] In some embodiments, the first sub-beam and the second sub-beam are connected by bonding, clamping or fasteners. By bonding, clamping or fasteners, reliable connection between the first sub-beam and the second sub-beam is achieved.

[0026] In some embodiments, at least one of the first sub-beam and the second sub-beam is a hollow structure. The weight of the first sub-beam and the second sub-beam is reduced, thereby reducing the weight of the battery box and the weight of the battery device.

[0027] In some embodiments, the second sub-beam is configured as an insulating beam. While meeting the isolation and positioning of the adjacent two battery monomers, the short circuit phenomenon between the battery monomers is reduced.

[0028] In some embodiments, the battery box further comprises a fourth cross beam arranged in the box body, and the fourth cross beam and the box body jointly define an electrical cavity for arranging electrical elements. By the fourth cross beam, a relatively independent electrical cavity is defined to protect the electrical elements in the electrical cavity.

[0029] Embodiments of the second aspect of the application provide a battery box, comprising: a box body, a first cross beam and a first force bearing member, the box body is formed with a receiving cavity; the first cross beam is arranged in the box body to separate the receiving cavity into a battery cavity and a crash cavity; the first force bearing member is arranged in the crash cavity and is supported and connected between the first cross beam and the box body.

[0030] Embodiments of the third aspect of the application provide a power utilization device, which comprises the battery device in the above embodiments, and the battery device is used to provide electric energy.

[0031] Embodiments of the fourth aspect of the application provide a vehicle, which comprises the battery device in the above embodiments.

[0032] In some embodiments, the vehicle comprises a vehicle body; a third cross beam in a battery box in the battery device is arranged in alignment with a B pillar of the vehicle body. The third cross beam can better cooperate with the B pillar to jointly bear the impact, thereby improving the reliability of the battery box and the safety of the battery device.

[0033] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0034] In the drawings, like reference numerals refer to same or similar functionalities throughout the several views. The drawings are not necessarily to scale. It is to be understood that the drawings only depict some embodiments according to the present disclosure and should not be considered as limiting the scope of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below only represent some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on the drawings.

[0035] FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application;

[0036] FIG. 2 is an exploded structural schematic diagram of a battery device according to some embodiments of the present application;

[0037] FIG. 3 is a structural schematic diagram of a battery box according to some embodiments of the present application;

[0038] FIG. 4 is another structural schematic diagram of the battery box according to some embodiments of the present application;

[0039] FIG. 5 is an enlarged structural schematic diagram of A in FIG. 4;

[0040] FIG. 6 is a structural schematic diagram of a first force bearing member according to some embodiments of the present application;

[0041] FIG. 7 is an enlarged structural schematic diagram of B in FIG. 4;

[0042] FIG. 8 is an enlarged structural schematic diagram of C in FIG. 4;

[0043] FIG. 9 is a partial structural schematic diagram of the battery device according to some embodiments of the present application;

[0044] FIG. 10 is an enlarged structural schematic diagram of D in FIG. 9;

[0045] FIG. 11 is a sectional structural schematic diagram of a third cross beam according to some embodiments of the present application;

[0046] Fig. 12 is an enlarged structural schematic view of Fig. 3 at E;

[0047] Fig. 13 is an enlarged structural schematic view of Fig. 9 at F.

[0048] BRIEF DESCRIPTION OF DRAWINGS 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, battery box; 20, battery cell; 11, box body; 111, first side beam; 112, second side beam; 113, connecting beam; 114, third side beam; 12, upper cover; 13, first cross beam; 14, first force receiving member; 141, first force receiving part; 142, second force receiving part; 143, connecting part; 144, buffer part; 145, reinforcing structure; 146, hollowed-out area; 15, second force receiving member; 16, second cross beam; 161, main beam; 162, connecting end part; 17, third cross beam; 171, first sub-beam; 172, second sub-beam; 18, bottom plate; 19, fourth cross beam; 30, cooling pipeline; 40, fastener; C1, battery cavity; C2, anti-collision cavity; C3, electrical cavity; F1, first direction; F2, second direction; S1, first avoiding space; S2, second avoiding space; G, accommodating groove. DETAILED DESCRIPTION

[0049] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0052] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0053] In the description of the embodiments of the application, the term“and / or” is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character“ / ” herein generally represents an“or” relationship between the front and rear associated objects.

[0054] In the description of the embodiments of the application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces).

[0055] In the description of the embodiments of the application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the application.

[0056] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood in a broad sense, 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 terms in the embodiments of the application can be understood according to the specific circumstances.

[0057] At present, from the development of market situation, the application of battery is more and more extensive. The battery is not only applied to the energy storage power supply system of water power, fire power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of the battery, the demand of the market is also increasing.

[0058] At present, the demand for battery energy density and weight reduction is increasing, and higher structural strength is required for the battery, and some vehicle models need the battery to withstand impact collision force. Therefore, the battery needs to be designed with anti-collision structure to cope with various collision conditions, thereby improving the safety of the battery.

[0059] Among various collision conditions, the test method of small overlap barrier (SOB) condition is that the vehicle collides with a fixed, 25% vehicle width overlap rate, and non-deformable rigid barrier at a speed of 64km / h. SOB is a more stringent collision condition. During SOB collision, the battery will also be subjected to a larger impact, which will cause the battery to be extruded and deformed, and even cause safety accidents such as short circuit, fire or explosion.

[0060] In order to improve the anti-collision performance of the battery, the battery needs to be designed with reliable anti-collision structure to improve the safety of the battery.

[0061] Based on the above considerations, the embodiments of the present application provide a battery device, a battery box, a power device and a vehicle. The battery device comprises a battery monomer and a battery box. The battery box comprises a box body, a first cross beam and a first force bearing piece. The box body forms an accommodating cavity inside, the first cross beam is arranged in the box body to separate the accommodating cavity into a battery cavity and an anti-collision cavity, the first force bearing piece is arranged in the anti-collision cavity and is supported and connected between the first cross beam and the box body.

[0062] By arranging the first force bearing piece in the anti-collision cavity and supporting the box body from the inside of the anti-collision cavity by the first force bearing piece under the cooperation of the first cross beam, the strength of the box body is improved, the stress deformation of the box body towards the side of the battery monomer is reduced, and the phenomenon of the battery monomer being extruded in the battery cavity is reduced. That is, the anti-collision performance of the battery device is improved by strengthening the structural strength of the box body, and accordingly, the safety of the battery device is improved.

[0063] The battery device disclosed in the embodiments of the present application can be used in a power device such as a vehicle, a ship or an aircraft, but is not limited thereto. The power system of the power device can be composed of the battery device disclosed in the present application, which is advantageous to improve the anti-collision performance of the battery device and improve the safety of the battery device.

[0064] The embodiments of the present application provide a power device using a battery device as a power source. The power device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0065] The following embodiments are described by taking a vehicle 1000 as an example for convenience of illustration.

[0066] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle provided by some embodiments of the present application. The vehicle 1000 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 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0067] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0068] Referring to FIG. 2, FIG. 2 is an exploded structural schematic diagram of a battery device provided by some embodiments of the present application. The battery device 100 includes a battery box 10 and a battery monomer 20, and the battery monomer 20 is accommodated in the battery box 10. The battery box 10 is used to provide an accommodation space for the battery monomer 20, and the battery box 10 can adopt various structures. In some embodiments, the battery box 10 can include a box body 11 and an upper cover 12, and the upper cover 12 and the box body 11 are mutually covered. The upper cover 12 and the box body 11 jointly define an accommodation space for accommodating the battery monomer 20. The box body 11 can be a hollow structure with one end open, and the upper cover 12 can be a plate-shaped structure. The upper cover 12 is covered on the open side of the box body 11, so that the upper cover 12 and the box body 11 jointly define the accommodation space. The upper cover 12 and the box body 11 can also be hollow structures with one side open, and the open side of the upper cover 12 is covered on the open side of the box body 11. Of course, the battery box 10 formed by the upper cover 12 and the box body 11 can have various shapes, such as a cylinder, a cuboid, etc.

[0069] In the battery device 100, the battery cells 20 can be multiple, and the multiple battery cells 20 can be connected in series or in parallel or in a mixed manner. The mixed manner means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series or in parallel or in a mixed manner, and then the multiple battery cells 20 are accommodated in the battery box 10. Of course, the battery device 100 can also be that the multiple battery cells 20 are connected in series or in parallel or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series or in parallel or in a mixed manner to form a whole and are accommodated in the battery box 10. The battery device 100 can also include other structures. For example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 20.

[0070] Each battery cell 20 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid or other shapes.

[0071] FIG. 3 is a schematic structural view of a battery box according to some embodiments of the present application; FIG. 4 is another schematic structural view of a battery box according to some embodiments of the present application; and FIG. 5 is an enlarged schematic structural view of a portion of FIG. 4.

[0072] In combination with FIGS. 3 to 5, the battery device 100 according to some embodiments of the present application includes a battery box 10 and battery cells 20. The battery box 10 includes a box body 11, a first cross beam 13 and a first force receiving member 14. The box body 11 has an accommodating cavity formed therein, the first cross beam 13 is arranged in the box body 11 to divide the accommodating cavity into a battery cavity C1 and a crash cavity C2, and the first force receiving member 14 is arranged in the crash cavity C2 and is supported between the first cross beam 13 and the box body 11.

[0073] The first cross beam 13 is arranged in the box body 11 to divide the accommodating cavity into the battery cavity C1 and the crash cavity C2. It can be understood that the battery cavity C1 and the crash cavity C2 are located on opposite sides of the first cross beam 13, respectively.

[0074] The battery cavity C1 is a chamber for accommodating the battery cells 20 and can fix and position the battery cells 20. The crash cavity C2 is used to absorb the impact of a collision to reduce the transmission of the impact to the battery cavity C1 as much as possible.

[0075] The first force receiving member 14 has a certain strength and supports the box body 11 under the cooperation of the first cross beam 13 to improve the strength of the box body 11. Under the support of the first force receiving member 14, the deformation of the box body 11 and the crash cavity C2 when subjected to the impact of a collision can be reduced to some extent, thereby protecting the battery cells 20 in the battery cavity C1.

[0076] In some embodiments, the anti-collision cavity C2 and the battery cavity C1 can be arranged along the first direction F1, and the anti-collision cavity C2 is located at the front end of the battery device 100 relative to the battery cavity C1. For SOB collision, the part of the box body 11 near the anti-collision cavity C2 is the part that is impacted by the impact, and the first force-bearing member 14 supports the box body 11 from the inside of the anti-collision cavity C2, thereby improving the strength of the box body 11 and reducing the stress deformation of the box body 11 toward the side of the battery monomer 20, thereby reducing the phenomenon of the battery monomer 20 in the battery cavity C1 being squeezed.

[0077] By arranging the first force-bearing member 14 in the anti-collision cavity C2 and cooperating with the first cross beam 13, the first force-bearing member 14 supports the box body 11 from the inside of the anti-collision cavity C2, thereby improving the strength of the box body 11 and reducing the stress deformation of the box body 11 toward the side of the battery monomer 20, thereby reducing the phenomenon of the battery monomer 20 in the battery cavity C1 being squeezed. That is, by strengthening the structural strength of the box body 11, the anti-collision performance of the battery device 100 is improved, and accordingly, the safety of the battery device 100 is improved.

[0078] As shown in FIGS. 3 to 5, according to some embodiments of the present application, the first force-bearing member 14 has a first end connected with the box body 11 and a second end connected with the first cross beam 13. In the horizontal plane, along the extension direction of the first cross beam 13, the maximum width of the first end is less than the maximum width of the second end.

[0079] The horizontal plane refers to a plane parallel to the bottom surface of the box body 11. The maximum width of the first end of the first force-bearing member 14 is less than the maximum width of the second end, that is, the size of the second end is larger, and accordingly, the connection area of the second end with the first cross beam 13 is larger, and the first cross beam 13 can provide more reliable support for the first force-bearing member 14.

[0080] In some embodiments, for SOB collision, the direction of the impact of the collision impact is the direction in which the first end of the first force-bearing member 14 faces the second end, that is, the collision impact is transmitted from the first end to the second end, and the size of the second end is larger, that is, the size of the first force-bearing member 14 along the stress path has a tendency to increase, so that the first force-bearing member 14 can form a structure with greater strength to better adapt to the collision impact. At the same time, the larger size of the second end increases the connection area of the first force-bearing member 14 with the first cross beam 13, thereby improving the connection strength between the first force-bearing member 14 and the first cross beam 13, so that the first cross beam 13 can provide reliable support for the first force-bearing member 14, thereby improving the reliability of the first force-bearing member 14, and further improving the reliability of the first force-bearing member 14 supporting the box body 11, thereby reducing the stress deformation of the box body 11.

[0081] By setting the size of the first end of the first force bearing piece 14 to be smaller than the size of the second end, the structural strength of the first force bearing piece 14 is improved, and at the same time, the reliability of the support of the first beam 13 to the first force bearing piece 14 is improved, and then the reliability of the support of the first force bearing piece 14 to the box body 11 is improved.

[0082] As shown in FIG. 5, according to some embodiments of the present application, the first force bearing piece 14 includes a force bearing part, which includes a first force bearing part 141 and a second force bearing part 142 connected with the first beam 13 respectively, and the first force bearing part 141 and the second force bearing part 142 are arranged in a horizontal plane.

[0083] The first force bearing part 141 and the second force bearing part 142 jointly form the second end of the first force bearing piece 14 near one end of the first beam 13, and the first force bearing part 141 and the second force bearing part 142 are arranged in a spaced manner, so that the first force bearing part 141 and the second force bearing part 142 as a whole can form a wider second end, and at the same time, the spaced first force bearing part 141 and the second force bearing part 142 form a hollow part, which is beneficial to the weight reduction of the first force bearing piece 14.

[0084] By arranging the first force bearing part 141 and the second force bearing part 142 in a spaced manner, a larger second end of the first force bearing piece 14 can be formed, and the weight reduction of the first force bearing piece 14 is also facilitated.

[0085] As shown in FIG. 5, according to some embodiments of the present application, the first force bearing piece 14 further includes a connecting part 143 connected with the box body 11, and one end of the first force bearing part 141 and the second force bearing part 142 away from the first beam 13 is connected with the connecting part 143, and the first force bearing part 141 and the second force bearing part 142 are arranged at an angle in a horizontal plane.

[0086] The connecting part 143 is a component connected with the box body 11, and one end of the connecting part 143 close to the box body 11 forms the first end of the first force bearing piece 14. The first force bearing part 141 and the second force bearing part 142 are arranged in extension in a horizontal plane, and the first force bearing part 141 and the second force bearing part 142 are arranged at an angle in a horizontal plane, which means that the extension direction of the first force bearing part 141 and the extension direction of the second force bearing part 142 are arranged at an angle, so that the first force bearing part 141 and the second force bearing part 142 can support the box body 11 from two different directions, improving the reliability and comprehensiveness of the support, so that the box body 11 can better support the collision impact from multiple different directions, effectively improving the overall strength of the box body 11.

[0087] By setting the first force receiving portion 141 and the second force receiving portion 142 at an angle, the first force receiving portion 141 and the second force receiving portion 142 can support the box body 11 from two different directions, improving the reliability and comprehensiveness of the support, so that the box body 11 can better support the collision impact from multiple different directions, effectively improving the overall strength of the box body 11, and further improving the safety of the battery device 100.

[0088] As shown in FIG. 5, according to some embodiments of the present application, the top surface of the connecting portion 143 is higher than the top surface of the force receiving portion in the vertical direction.

[0089] The vertical direction is a direction perpendicular to the horizontal plane. The top surface of the connecting portion 143 is higher than the top surface of the force receiving portion, that is, the force receiving portion is recessed downward relative to the connecting portion 143, increasing the arrangement space above the top surface of the force receiving portion and saving the arrangement space within the box body 11.

[0090] By reducing the height of the force receiving portion in the vertical direction, the arrangement space above the force receiving portion is increased, saving the arrangement space within the box body 11 and facilitating the arrangement of other components within the box body 11.

[0091] As shown in FIG. 5, according to some embodiments of the present application, the first force receiving portion 141 further includes a buffer portion 144 disposed between the force receiving portion and the connecting portion 143, the top surface of the buffer portion 144 is a slope intersecting with the horizontal plane, one end of the slope is connected with the top surface of the connecting portion 143, and the other end of the slope is connected with the top surface of the force receiving portion.

[0092] The height of the top surface of the connecting portion 143 is higher than the height of the top surface of the force receiving portion, that is, one end of the slope is higher than the other end of the slope. The direction of the collision impact is the direction of the connecting portion 143 towards the force receiving portion, that is, along the direction of the collision impact, the height of the slope gradually decreases, and correspondingly, the thickness of the buffer portion 144 gradually decreases. Therefore, it is beneficial for the buffer portion 144 to collapse when subjected to a larger collision impact, so as to absorb the energy of the collision impact as much as possible, thereby reducing the impact on the battery monomer 20.

[0093] By setting the buffer portion 144 with a sloping top surface, and along the direction of the collision impact, the height of the slope gradually decreases, which is beneficial for the buffer portion 144 to collapse when subjected to a larger collision impact, thereby absorbing the energy of the collision impact as much as possible, and further reducing the impact on the battery monomer 20.

[0094] As shown in FIGS. 3-5, according to some embodiments of the present application, the first force receiving portion 141 is connected perpendicularly with the first cross beam 13 in the horizontal plane.

[0095] In some embodiments, the first cross beam 13 extends in a second direction F2 perpendicular to the first direction F1 in a horizontal plane, and the first force receiving portion 141 is arranged to extend in the first direction F1, which is the direction of the impact on the box body 11 in the SOB collision, i.e., the first direction F1 is the extension direction of the force receiving path on the box body 11, and the first force receiving portion 141 arranged to extend in the first direction F1 can support the box body 11 in the extension direction of the force receiving path.

[0096] By arranging the first force receiving portion 141 perpendicular to the first cross beam 13, the first force receiving portion 141 can better support the box body 11 when subjected to an impact in a direction perpendicular to the first cross beam 13, so as to adapt to the impact on the box body 11 from the direction, i.e., the first force receiving portion 141 can support the box body 11 in the extension direction of the force receiving path, thereby improving the strength and reliability of the first force receiving portion 141 in supporting the box body 11.

[0097] As shown in FIGS. 3-5, according to some embodiments of the present application, the box body 11 includes a first side beam 111, a second side beam 112, and a connecting beam 113. The second side beam 112 is perpendicular to the first side beam 111, and the two ends of the connecting beam 113 are connected to the first side beam 111 and the second side beam 112, respectively, and the first side beam 111, the second side beam 112, the connecting beam 113, and the first cross beam 13 together define an anti-collision cavity C2. The second force receiving portion 142 is arranged perpendicular to the connecting beam 113.

[0098] In some embodiments, the connecting beam 113 can serve as a mounting beam for assembling the battery box 10 to an electric device, and the connecting beam 113 can be arranged at an angle to the first side beam 111 and the second side beam 112.

[0099] In some embodiments, the first side beam 111 is arranged in parallel and spaced apart with two, and the two first side beams 111 are symmetrically arranged at both ends of the second side beam 112. In this case, the connecting beam 113 can also be provided with two, and the two connecting beams 113 are symmetrically arranged at both ends of the second side beam 112, and the first side beam 111 is connected with the second side beam 112 through the corresponding connecting beam 113, and accordingly, the first force bearing member 14 is also provided with two, and the structures of the two first force bearing members 14 are symmetrical. The second side beam 112 can correspond to the front end of the battery device 100, and the first side beam 111 corresponds to the left and right sides of the battery device 100. For SOB collision with a 25% vehicle width overlap rate, the parts that are more likely to be impacted are the second side beam 112 and the connecting beam 113. The first end of the first force bearing member 14 is connected with the connecting beam 113, that is, the first force bearing member 14 is supported between the connecting beam 113 and the first cross beam 13, and the first force receiving part 141 is perpendicular to the first cross beam 13 and parallel to the first side beam 111, thereby improving the SOB crashworthiness of the battery device 100.

[0100] In some embodiments, the first cross beam 13 is connected with the first side beam 111, thereby supporting the first side beam 111, and is used to fix and position the battery monomer 20 in the battery cavity C1. The first cross beam 13 can also serve as an expansion beam to bear the expansion force of the battery monomer 20, thereby improving the reliability of the fixation and positioning of the battery monomer 20.

[0101] The second force receiving part 142 is perpendicular to the connecting beam 113, so that the second force receiving part 142 can support the connecting beam 113 in a direction perpendicular to the connecting beam 113, so as to adapt to the collision impact of the connecting beam 113 in a direction perpendicular to the extension direction of the connecting beam 113, and the second force receiving part 142 can support the connecting beam 113 in the extension direction of the force receiving path, thereby improving the strength and reliability of the support of the second force receiving part 142 to the connecting beam 113.

[0102] By arranging the second force receiving part 142 perpendicular to the connecting beam 113, the second force receiving part 142 can adapt to the collision impact of the connecting beam 113 in a direction perpendicular to the extension direction of the connecting beam 113, and the second force receiving part 142 can support the connecting beam 113 in the extension direction of the force receiving path, thereby improving the strength and reliability of the support of the second force receiving part 142 to the connecting beam 113.

[0103] As shown in FIG. 3, according to some embodiments of the present application, the acute angle formed by the connecting beam 113 and the first side beam 111 in the horizontal plane is 45 degrees.

[0104] The included angle between the connecting beam 113 and the first side beam 111 is 45 degrees, that is, the connecting beam 113 is 45 degrees to the first direction F1. For a 45-degree collision, the action direction of the collision impact is perpendicular to the connecting beam 113, and the second stress receiving part 142 is perpendicular to the connecting beam 113, so that the second stress receiving part 142 improves the 45-degree collision resistance of the battery device 100. At the same time, the first stress receiving part 141 perpendicular to the first cross beam 13 improves the SOB collision resistance of the battery device 100, that is, the first stress receiving part 141 improves the 45-degree collision resistance and the SOB collision resistance of the battery device 100.

[0105] By setting the connecting beam 113 at 45 degrees to the first side beam 111, and supporting the connecting beam 113 by the second stress receiving part 142 perpendicular to the connecting beam 113, the 45-degree collision resistance of the battery device 100 is improved. At the same time, the first stress receiving part 141 perpendicular to the first cross beam 13 can also improve the SOB collision resistance of the battery device 100.

[0106] In combination with FIGS. 5 and 6, FIG. 6 is a structural schematic diagram of the first stress receiving part according to some embodiments of the present application.

[0107] According to some embodiments of the present application, the first stress receiving part 14 includes a panel and a reinforcing structure 145 located on one side of the panel facing the bottom of the box body 11. The panel and the reinforcing structure 145 are integrally die-cast.

[0108] The top surface of the connecting part 143, the top surface of the buffer part 144, and the top surface of the stress receiving part together form the panel. The reinforcing structure 145 can improve the overall structural strength of the first stress receiving part 14. At the same time, by integrally die-casting the panel and the reinforcing structure 145, it is easy to form the reinforcing structure 145 on the panel, which reduces the process difficulty of preparing the reinforcing structure 145. At the same time, based on the characteristics of the die-casting process, the panel and the reinforcing structure 145 obtained by the die-casting process have high strength, which further improves the structural strength of the first stress receiving part 14, and further improves the reliability of the first stress receiving part 14 supporting the connecting beam 113. In addition, compared with the extrusion process, the die-casting process can reduce the occupied space of the first stress receiving part 14, thereby saving the arrangement space in the battery box body 10.

[0109] In some embodiments, the reinforcing structure 145 can be, but is not limited to, a reinforcing rib or a reinforcing rib plate.

[0110] By setting the reinforcing structure 145 on the panel, the overall structural strength of the first stress receiving part 14 is improved, and based on the characteristics of the die-casting process, the structural strength of the first stress receiving part 14 can be further improved, and the arrangement space in the battery box body 10 can be saved.

[0111] As shown in Figure 6, according to some embodiments of this application, the reinforcing structure 145 includes a plurality of staggered reinforcing ribs, with at least one hollow area 146 formed between the plurality of reinforcing ribs.

[0112] The staggered distribution of multiple reinforcing ribs refers to the intersection of multiple reinforcing ribs. This allows the reinforcing ribs to support the panel from multiple directions, thereby increasing the overall structural strength of the first load-bearing member 14 and enabling it to more reliably withstand impacts from multiple directions. Die casting facilitates the formation of complex, staggered reinforcing ribs, reducing the manufacturing difficulty of the reinforcing ribs.

[0113] The reinforcing ribs protrude from the panel and extend toward the side near the bottom of the box body 11. At least one cavity is defined between the multiple reinforcing ribs and the panel, which is the hollow area 146.

[0114] By setting multiple staggered reinforcing ribs, the overall structural strength of the first load-bearing component 14 is improved. At the same time, the hollow area 146 formed between the reinforcing ribs is conducive to the weight reduction of the first load-bearing component 14.

[0115] As shown in Figures 3, 4 and 7, Figure 7 is an enlarged structural diagram of point B in Figure 4.

[0116] According to some embodiments of this application, the battery box 10 further includes a second load-bearing member 15, the two ends of which are connected to the first crossbeam 13 and the second side beam 112 respectively, and the second load-bearing member 15 is perpendicular to the first crossbeam 13.

[0117] For a 25% vehicle width overlap (SOB) collision, the second side beam 112 will also be impacted. Therefore, a second load-bearing member 15 is set between the first crossbeam 13 and the second side beam 112. The second load-bearing member 15 supports the second side beam 112, which further improves the overall structural strength of the battery box 10, thereby reducing the overall deformation of the battery box 10 when it is impacted, and thus reducing the phenomenon of the battery cells 20 being squeezed inside the battery box 10.

[0118] In some embodiments, the number of second load-bearing members 15 is two, and the two second load-bearing members are arranged symmetrically.

[0119] By setting the second load-bearing component 15 to support the second side beam 112, the overall structural strength of the battery box 10 is further improved. Thus, by strengthening the structural strength of the battery box 10, the anti-collision performance of the battery device 100 is improved, and the safety of the battery device 100 is correspondingly improved.

[0120] Referring to Figures 3 and 4, according to some embodiments of this application, the battery housing 10 further includes a second crossbeam 16 disposed in the battery cavity C1. The second crossbeam 16 is parallel to the first crossbeam 13, and both ends of the second crossbeam 16 are respectively connected to the housing body 11.

[0121] In some embodiments, the two ends of the second crossbeam 16 are respectively connected to the two first side beams 111, and the second crossbeam 16 is perpendicular to the first side beams 111. The second crossbeam 16 is used to support the first side beams 111, thereby improving the structural strength of the battery box 10. The first side beams 111 correspond to the left and right sides of the battery device 100. With the support of the second crossbeam 16, the side impact resistance of the battery device 100 can be improved to a certain extent.

[0122] In some embodiments, the second crossbeam 16 serves to fix and position the battery cell 20 within the battery cavity C1. The second crossbeam 16 can also serve as an expansion beam to withstand the expansion force of the battery cell 20, thereby improving the reliability of fixing and positioning the battery cell 20.

[0123] By setting a second crossbeam 16 to support the box body 11, the side impact resistance of the battery device 100 is improved. At the same time, the second crossbeam 16 can also play a good role in fixing and positioning the battery cells 20.

[0124] Referring to Figures 8 to 10, Figure 8 is an enlarged structural schematic diagram of Figure 4 at point C; Figure 9 is a partial structural schematic diagram of the battery device of some embodiments of this application; and Figure 10 is an enlarged structural schematic diagram of Figure 9 at point D.

[0125] According to some embodiments of this application, the second crossbeam 16 includes a main beam 161 and connecting ends 162 located at both ends of the main beam 161. The top surface of the connecting ends 162 is lower than the top surface of the main beam 161, so that a first clearance space S1 is formed between the main beam 161 and the box body 11.

[0126] In some embodiments, the connecting ends 162 at both ends of the main beam 161 are connected to the first side beam 111. The top surface of the connecting end 162 is lower than the top surface of the main beam 161, that is, the top surface of the connecting end 162 is concave relative to the top surface of the main beam 161. The ends of the main beam 161, the top surface of the connecting end 162 and the first side beam 111 together define a first clearance space S1. The first clearance space S1 is used to avoid the cooling pipe 30 for cooling the battery cell 20, so that the cooling pipe 30 can be arranged in the first clearance space S1, which can not only meet the arrangement requirements of the cooling pipe S1, but also reduce the interference between the cooling pipe S1 and the second crossbeam 16 during the assembly process.

[0127] In some embodiments, the main beam 161 and the connecting end 162 are integrally formed, and a first clearance space S1 is formed between the stepped structure at the end of the second crossbeam 16 and the first side beam 111.

[0128] By setting a first clearance space S1, the cooling pipe 30 can be arranged within the first clearance space S1, which can not only meet the assembly requirements of the cooling pipe 30, but also reduce interference during the assembly process.

[0129] Referring to Figures 3, 4, 9, 11 and 12, Figure 11 is a schematic diagram of the cross-sectional structure of the third crossbeam in some embodiments of this application, and Figure 12 is an enlarged schematic diagram of the structure at point E in Figure 3.

[0130] According to some embodiments of this application, the battery housing 10 further includes a third crossbeam 17 disposed in the battery cavity. The third crossbeam 17 includes a first sub-beam 171 and a second sub-beam 172 that are detachably connected to each other in the vertical direction. At least one of the first sub-beam 171 and the second sub-beam 172 is connected to the housing body 11.

[0131] Taking electric vehicles as an example, in side-impact scenarios, the battery housing 10 has virtually no crossbeam design corresponding to the side-impact force location of the electric vehicle. Based on this, in this embodiment, a third crossbeam 17 is added to the battery housing 10 to support the impact force of a side-impact collision, reduce the deformation of the battery housing 10 in side-impact scenarios, and improve the safety of the battery device 100. In some embodiments, the third crossbeam 17 can be aligned with the B-pillar of the vehicle body. Then, when a side-impact collision occurs at the B-pillar, the third crossbeam 17 can better cooperate with the B-pillar to jointly withstand the impact, thereby reliably supporting the housing body 11 and further improving the safety of the battery device 100.

[0132] Adding a third crossbeam 17 would occupy some space within the battery cavity C1 belonging to the individual battery cells 20, and would divide the battery cavity C1 into two parts located on opposite sides of the third crossbeam 17. Consequently, the multiple battery cells 20 within the battery cavity C1 would also be divided into two groups. Therefore, when assembling the battery cells 20 into the battery cavity, it was necessary to first place multiple battery cells 20 from one group into one part of the battery cavity C1, and then place multiple battery cells 20 from the other group into the other part of the battery cavity C1, i.e., assembly required two steps. By setting the third crossbeam 17 as a two-part structure, the assembly of the two groups of battery cells 20 located on both sides of the third crossbeam 17 into the battery cavity can be achieved in only one step.

[0133] In some embodiments, the first sub-beam 171 is connected to the housing body 11, and the second sub-beam 172 is located above the first sub-beam 171. Before the battery cell 20 is assembled into the battery cavity C1, the second sub-beam 172 is arranged between the two sets of battery cells 20. Thus, the two sets of battery cells 20 and the second sub-beam 172 can be clamped together by the grippers. The second sub-beam 172 is clamped between the two sets of battery cells 20. At this time, the second sub-beam 172 is equivalent to a battery cell shape. Then, the grippers put the two sets of battery cells 20 and the second sub-beam 172 into the battery cavity C1 together. This allows the assembly of the two sets of battery cells 20 located on both sides of the third crossbeam 17 into the battery cavity C1 in just one step, reducing the assembly process and improving the assembly efficiency.

[0134] By adding a third crossbeam 17, the side-impact protection performance of the battery device 100 is further improved. At the same time, the two-part structure of the third crossbeam 17 helps to improve the efficiency of battery cell 20 assembly.

[0135] Referring to Figures 3, 11 and 12, according to some embodiments of this application, the box body 11 includes two parallel and spaced-apart first side beams 111, the two ends of the first sub-beam 171 are respectively connected to the two first side beams 111, and the second sub-beam 172 has a receiving groove G on the side facing the first sub-beam 171 to receive the first sub-beam 171.

[0136] When the second sub-beam 172 is assembled with the first sub-beam 171, the receiving groove G is fitted onto the surface of the first sub-beam 171. The bottom surface and two side surfaces of the receiving groove G form a saddle-like structure on the first sub-beam 171, which improves the stability of the second sub-beam 172. Simultaneously, the two side walls of the receiving groove G can limit the movement of the second sub-beam 172 along the first direction F1 on the first sub-beam 171. In other words, the receiving groove G serves to position and limit the assembly of the second sub-beam 172.

[0137] By providing a receiving groove G on the second sub-beam 172, the assembly between the second sub-beam 172 and the first sub-beam 171 can be completed, while improving the stability and reliability of the second sub-beam 172 after assembly.

[0138] As shown in Figures 3, 4, 9, 12 and 13, Figure 13 is an enlarged structural diagram of point F in Figure 9.

[0139] According to some embodiments of this application, at least one of the two ends of the second sub-beam 172 is spaced apart from the corresponding first side beam 111, and a second clearance space S2 is formed between one end of the second sub-beam 172 and the corresponding first side beam 111. The second clearance space S2 is used to avoid components in the battery cavity C1.

[0140] In some embodiments, at least one end of the second sub-beam 172 is spaced apart from the corresponding first side beam 111. It is understood that the length of the second sub-beam 172 is less than that of the first sub-beam 171. The first sub-beam 171 is connected to the first side beam 111, while the second sub-beam 172 is not connected to the first side beam 111. The ends of the second sub-beam 172 and the first sub-beam 171 form a stepped structure, which, together with the first side beam 111, defines a second clearance space S2.

[0141] The second clearance space S2 serves the same purpose as the first clearance space S1, namely, to allow the cooling pipes 30 that cool the battery cells 20 to pass through. This allows the cooling pipes 30 to be arranged within the second clearance space S2, thus satisfying the arrangement requirements of the cooling pipes 30 and reducing interference between the cooling pipes 30 and the third crossbeam 17 during assembly.

[0142] By setting a second clearance space S2, the cooling pipe 30 can be arranged within the second clearance space S2, which can not only meet the arrangement requirements of the cooling pipe 30, but also reduce the interference of the cooling pipe 30 during the assembly process.

[0143] As shown in Figure 11, according to some embodiments of this application, the first sub-beam 171 and the second sub-beam 172 are connected by adhesive, snap-fit ​​or fasteners.

[0144] In some embodiments, the first sub-beam 171 is connected to the base plate 18 of the battery housing 10 by fasteners 40. Adhesive can be applied to the surface of the first sub-beam 171 or the inner surface of the receiving groove G, and the receiving groove G can be fitted onto the surface of the first sub-beam 171 to achieve bonding between the first sub-beam 171 and the second sub-beam 172. Alternatively, a snap-fit ​​structure can be provided on the surface of the first sub-beam 171 and the inner surface of the receiving groove G, so that the first sub-beam 171 and the second sub-beam 172 are snapped together when the receiving groove G is fitted onto the first sub-beam 171 in the vertical direction. Alternatively, the fit between the first sub-beam 171 and the receiving groove G can be set to an interference fit, thereby allowing the receiving groove G to be directly snapped onto the first sub-beam 171. Alternatively, after the receiving groove G is fitted onto the first sub-beam 171, bolts are used to pass through the first sub-beam 171 and the second sub-beam 172 to achieve connection between the two.

[0145] A reliable connection between the first sub-beam 171 and the second sub-beam 172 is achieved by bonding, snapping, or fastening.

[0146] As shown in Figure 11, according to some embodiments of this application, at least one of the first sub-beam 171 and the second sub-beam 172 is a hollow structure.

[0147] The hollow structure refers to the fact that the first sub-beam 171 and the second sub-beam 172 are hollow inside. In some embodiments, the first sub-beam 171 and the second sub-beam 172 can be prepared by an extrusion process to form a hollow structure.

[0148] By setting the first sub-beam 171 and the second sub-beam 172 as hollow structures, the weight of the first sub-beam 171 and the second sub-beam 172 is reduced, thereby reducing the weight of the battery box 10 and the battery device 100.

[0149] According to some embodiments of this application, the second sub-beam 172 is configured as an insulating beam.

[0150] The function of the second sub-beam 172 is to isolate and position two adjacent battery cells 20. The second sub-beam 172 is made of insulating material, such as plastic or other composite insulating material. In this way, the second sub-beam 172 can be sandwiched between battery modules and insulated from adjacent battery modules.

[0151] By setting the second sub-beam 172 as an insulating beam, short circuits between battery cells 20 are reduced while ensuring the isolation and positioning of two adjacent battery cells 20.

[0152] As shown in Figures 3 and 4, according to some embodiments of this application, the battery housing 10 further includes a fourth crossbeam 19 disposed within the housing body 11, the fourth crossbeam 19 and the housing body 11 together defining an electrical cavity C3 for arranging electrical components.

[0153] In some embodiments, the housing body 11 further includes a third side beam 114, the two ends of which are connected to two first side beams 111 respectively. The fourth crossbeam 19, the two first side beams 111, and the third side beam 114 together define the electrical cavity C3. The anti-collision cavity C2, the battery cavity C1, and the electrical cavity C3 are arranged sequentially along the first direction F1.

[0154] The fourth crossbeam 19 defines a relatively independent electrical cavity C3 to protect the electrical components within the electrical cavity C3.

[0155] An embodiment of the second aspect of this application provides a battery housing 10, including a housing body 11, a first crossbeam 13, and a first load-bearing member 14. A receiving cavity is formed within the housing body 11. The first crossbeam 13 is disposed within the housing body 11 to divide the receiving cavity into a battery cavity C1 and an anti-collision cavity C2. The first load-bearing member 14 is disposed in the anti-collision cavity C2 and is supported and connected between the first crossbeam 13 and the housing body 11.

[0156] The first crossbeam 13 is disposed inside the housing body 11 to divide the receiving cavity into a battery cavity C1 and an anti-collision cavity C2. It can be understood that the battery cavity C1 and the anti-collision cavity C2 are located on opposite sides of the first crossbeam 13.

[0157] Battery cavity C1 refers to the chamber used to house the battery cell 20, which serves to fix and position the battery cell 20. Collision-resistant cavity C2 is used to absorb collision impacts, minimizing the transmission of impact to battery cavity C1.

[0158] The first load-bearing component 14 is a component with a certain strength that supports the box body 11 in cooperation with the first crossbeam 13, thereby increasing the strength of the box body 11. Under the support of the first load-bearing component 14, the deformation of the box body 11 and the anti-collision cavity C2 can be reduced to a certain extent when subjected to collision impact, thereby protecting the battery cells 20 in the battery cavity C1.

[0159] In some embodiments, the anti-collision cavity C2 and the battery cavity C1 can be arranged along the first direction F1. The anti-collision cavity C2 is located at the front end of the battery device 100 relative to the battery cavity C1. For SOB collisions, the part of the battery device 100 that is impacted is the part of the housing body 11 near the anti-collision cavity C2. The first load-bearing member 14 supports the housing body 11 from the inside of the anti-collision cavity C2, which improves the strength of the housing body 11 and reduces the force deformation of the housing body 11 toward the battery cell 20, thereby reducing the phenomenon of the battery cell 20 being squeezed in the battery cavity C1.

[0160] By setting a first load-bearing member 14 inside the anti-collision cavity C2, and with the cooperation of the first crossbeam 13, the first load-bearing member 14 supports the box body 11 from inside the anti-collision cavity C2, thereby increasing the strength of the box body 11 and reducing the stress deformation of the box body 11 towards the battery cell 20. This reduces the phenomenon of the battery cell 20 being squeezed in the battery cavity C1. In other words, by strengthening the structural strength of the box body 11, the anti-collision performance of the battery device 100 is improved, and correspondingly, the safety of the battery device 100 is improved.

[0161] An embodiment of the third aspect of this application provides an electrical device including a battery device 100 as described in the above embodiments, the battery device 100 being used to provide electrical energy.

[0162] In some embodiments, the electrical device may be a vehicle, which includes a body and the battery device 100 is mounted on the bottom of the body.

[0163] The power supply device in this embodiment can have all the beneficial effects of the battery device 100 described above, which will not be repeated here.

[0164] An embodiment of the fourth aspect of this application provides a vehicle including a battery device 100 as described in the above embodiments.

[0165] In some embodiments, the electrical device can serve not only as the operating power source for the vehicle but also as the driving power source for the vehicle, thereby providing driving power to the vehicle.

[0166] The vehicle in this embodiment can have all the beneficial effects of the battery device 100 described above, which will not be repeated here.

[0167] According to some embodiments of this application, the vehicle includes a body, and a third crossbeam 17 within the battery box 10 of the battery device 100 is aligned with the B-pillar of the body.

[0168] The B-pillar is the pillar between the front and rear doors of a vehicle. Its main function is to withstand impact forces from the sides, which can significantly improve the safety of passengers and also support the overall vehicle structure.

[0169] The alignment of the third crossbeam 17 with the B-pillar of the vehicle body means that it is aligned in the first direction F1, that is, in the front-rear direction of the vehicle.

[0170] By aligning the third crossbeam 17 with the B-pillar, when the vehicle is involved in a side collision at the B-pillar, the third crossbeam 17 can better cooperate with the B-pillar to jointly withstand the impact, thereby improving the reliability of the battery box 10 and thus improving the safety of the battery device 100.

[0171] The embodiments of this application will be described in further detail below with reference to Figures 1 to 13.

[0172] The battery device 100 includes a battery housing 10 and individual battery cells 20. The battery housing 10 includes: a housing body 11, a first crossbeam 13, a first load-bearing member 14, a second load-bearing member 15, a second crossbeam 16, a third crossbeam 17, a base plate 18, and a fourth crossbeam 19.

[0173] The box body 11 includes a first side beam 111, a second side beam 112, a connecting beam 113, and a third side beam 114. There are two first side beams 111 and two connecting beams 113. The two first side beams 111 are arranged in parallel and spaced apart. One end of the first side beam 111 is connected to the second side beam 112 through the connecting beam 113, and the other end of the first side beam 111 is connected to the third side beam 114. The first side beam 111 and the second side beam 112 are perpendicular to each other, and the connecting beam 113 is at a 45-degree angle to the first side beam 111.

[0174] The first crossbeam 13, the second crossbeam 16, the third crossbeam 17, the fourth crossbeam 19, and the second side beam 112 are arranged in parallel, and the first crossbeam 13 and the fourth crossbeam 19 are located inside the box body 11, which sequentially divides the accommodating cavity inside the box body 11 into the anti-collision cavity C2, the battery cavity C1, and the electrical cavity C3.

[0175] The first load-bearing component 14 is integrally formed by die casting and is disposed within the anti-collision cavity C2. The first load-bearing component 14 includes a connecting portion 143 connected to the connecting beam 113, a force-bearing portion connected to the first crossbeam 13, and a buffer portion 144 located between the connecting portion 143 and the force-bearing portion. The top surface of the connecting portion 143 is higher than the top surface of the force-bearing portion, and the top surface of the buffer portion 144 is an inclined surface connected to both the top surfaces of the connecting portion 143 and the force-bearing portion. The force-bearing portion includes a first force-bearing portion 141 and a second force-bearing portion 142. The first force-bearing portion 141 is parallel to the first crossbeam 13, and the second force-bearing portion 142 is perpendicular to the connecting beam 113. Multiple staggered reinforcing ribs are provided on the back of the panel of the first load-bearing component 14. The first load-bearing component 14 is used to improve the anti-SOB collision performance and the anti-45-degree collision performance of the battery device 100.

[0176] The second load-bearing member 15 is perpendicular to the second side beam 112, is disposed within the anti-collision cavity C2, and is connected to both the second side beam 112 and the first crossbeam 13. Two second load-bearing members 15 are symmetrically arranged, and the second load-bearing members 15 are used to improve the anti-SOB collision performance of the battery device 100.

[0177] The second crossbeam 16 is connected to the two first side beams 111 respectively. The stepped structure at both ends of the second crossbeam 16 and the first side beams 111 together define the first clearance space S1, which is used to avoid and arrange the cooling pipes 30. The second crossbeam 16 can improve the side collision protection performance of the battery device 100.

[0178] The third crossbeam 17 includes a first sub-beam 171 and a second sub-beam 172. The two ends of the first sub-beam 171 are connected to two first side beams 111 respectively, and are connected to the base plate 18 via fasteners 40. A receiving groove G is provided on the side of the second sub-beam 172 facing the first sub-beam 171. The first sub-beam 171 is located within the receiving groove G. The length of the first sub-beam 171 is greater than the length of the second sub-beam 172. The ends of the second sub-beam 172, the first sub-beam 171, and the first side beams 111 together define a second clearance space S2, which is used to avoid and arrange cooling pipes 30. The third crossbeam 17 can be aligned with the B-pillar of the vehicle body. The addition of the third crossbeam 17 improves the side-impact protection performance of the battery device 100, and the split third crossbeam 17 facilitates the assembly of the battery cells 20.

[0179] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, comprising: a battery cell, a battery case, comprising: a case body, in which a receiving cavity is formed; a first cross beam arranged in the case body to divide the receiving cavity into a battery cavity and a crash cavity; the battery cell is arranged in the battery cavity; and a first force bearing member arranged in the crash cavity and supported between the first cross beam and the case body.

2. The battery device of claim 1, wherein, The first force bearing member has a first end connected with the case body and a second end connected with the first cross beam; In a horizontal plane along the extension direction of the first cross beam, the maximum width of the first end is less than that of the second end.

3. The battery device according to claim 1 or 2, wherein The first force bearing member comprises a force receiving portion, which comprises a first force receiving portion and a second force receiving portion connected with the first cross beam respectively; the first force receiving portion and the second force receiving portion are arranged in a horizontal plane.

4. The battery device of claim 3, wherein, The first force bearing member further comprises a connecting portion connected with the case body; One end of the first force receiving portion and the second force receiving portion away from the first cross beam is connected with the connecting portion, and the first force receiving portion and the second force receiving portion are arranged at an angle in a horizontal plane.

5. The battery device of claim 4, wherein, The top surface of the connecting portion is higher than that of the force receiving portion in a vertical direction.

6. The battery device of claim 5, wherein, The first force bearing member further comprises a buffer portion arranged between the force receiving portion and the connecting portion; The top surface of the buffer portion is an inclined surface intersecting with the horizontal plane, one end of the inclined surface is connected with the top surface of the connecting portion, and the other end of the inclined surface is connected with the top surface of the force receiving portion.

7. The battery device according to any one of claims 3-6, wherein, The first force receiving portion is connected with the first cross beam perpendicularly in the horizontal plane.

8. The battery device according to any one of claims 3-7, wherein, The case body comprises: a first side beam, a second side beam perpendicular to the first side beam, and a connecting beam, both ends of which are connected with the first side beam and the second side beam respectively, and the first side beam, the second side beam, the connecting beam and the first cross beam jointly define the crash cavity; wherein the second force receiving portion is arranged perpendicularly to the connecting beam.

9. The battery device of claim 8, wherein, The acute angle formed by the connecting beam and the first side beam in the horizontal plane is 45 degrees.

10. The battery device according to any one of claims 1-9, wherein, The first force bearing member comprises a panel and a reinforcing structure on one side of the panel towards the bottom of the case body; wherein the panel and the reinforcing structure are integrally die-cast.

11. The battery device of claim 10, wherein, The reinforcing structure comprises a plurality of reinforcing ribs staggered distributed, and at least one hollow area is formed between the reinforcing ribs.

12. The battery device of any one of claims 1-11, wherein, The battery case further comprises a second force bearing member; both ends of the second force bearing member are connected with the first cross beam and the second side beam respectively, and the second force bearing member is perpendicular to the first cross beam.

13. The battery device of any one of claims 1-12, wherein, The battery case further comprises a second cross beam arranged in the battery cavity; the second cross beam is parallel to the first cross beam, and both ends of the second cross beam are connected with the case body respectively.

14. The battery device of claim 13, wherein, The second cross beam comprises a main beam and connecting end portions at both ends of the main beam, the top surface of the connecting end portions is lower than that of the main beam, so that a first avoiding space is formed between the main beam and the case body.

15. The battery device of any one of claims 1-14, wherein, The battery case further comprises a third cross beam arranged in the battery cavity; The third cross beam comprises a first sub-beam and a second sub-beam detachably connected to each other in the vertical direction, and at least one of the first sub-beam and the second sub-beam is connected to the box body.

16. The battery device of claim 15, wherein, The box body comprises two first side beams arranged in parallel and spaced apart; Both ends of the first sub-beam are connected to the two first side beams respectively, and the second sub-beam is formed with an accommodating groove on one side thereof facing the first sub-beam to accommodate the first sub-beam.

17. The battery device of claim 16, wherein, At least one of the two ends of the second sub-beam is spaced apart from the corresponding first side beam, and a second avoiding space is formed between one end of the second sub-beam and the corresponding first side beam, which is used to avoid components in the battery cavity.

18. The battery device of claim 15, wherein, The first sub-beam and the second sub-beam are connected by bonding, clamping or fasteners.

19. The battery device of claim 15, wherein, At least one of the first sub-beam and the second sub-beam is a hollow structure.

20. The battery device of any one of claims 15-19, wherein, The second sub-beam is configured as an insulating beam.

21. The battery device of any one of claims 1-20, wherein, The battery box further comprises a fourth cross beam arranged in the box body, and the fourth cross beam and the box body jointly define an electrical cavity for arranging electrical elements.

22. A battery box, comprising: a box body, wherein an accommodating cavity is formed in the box body; a first cross beam arranged in the box body to separate the accommodating cavity into a battery cavity and a crash cavity; and a first force bearing member arranged in the crash cavity and supported between the first cross beam and the box body.

23. An electric device, comprising the battery device according to any one of claims 1-21, wherein the battery device is used to provide electric energy.

24. A vehicle, comprising the battery device according to any one of claims 1-21.

25. The vehicle of claim 24, wherein, The vehicle comprises a vehicle body; The third cross beam in the battery box of the battery device is arranged in alignment with a B-pillar of the vehicle body.

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