Battery device and vehicle

Abstract

The utility model discloses a battery device and a vehicle. The battery device comprises a first box body, a second box body, a first sealing piece, a mounting piece and a protection piece, the first box body comprises a box body and a connecting part, and the connecting part is connected to the periphery of the box body. The first box body and the second box body are mutually covered and jointly define a space for accommodating a battery monomer, one side, facing the first box body, of the second box body is provided with a first surface and a second surface, the first surface is connected with the connecting part, the second surface is arranged on at least part of the periphery of the first surface, and the second box body is provided with a hanging hole; the mounting hole penetrates through the second surface. At least part of the first sealing piece is arranged between the connecting part and the first surface. One part of the mounting piece is located in the mounting hole, the other part of the mounting piece protrudes out of the second surface, and the mounting piece is used for being connected with a battery replacing support. The protection piece covers the second surface and the side, away from the first surface, of the connecting part. According to the technical scheme provided by the invention, the reliability of the battery device can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a vehicle. BACKGROUND

[0002] 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.

[0003] In the development of battery technology, how to improve the reliability of the battery device is a technical problem to be solved in battery technology. CONTENT OF THE INVENTION

[0004] The present application provides a battery device and a vehicle. The technical scheme provided by the present application can effectively improve the reliability of the battery device.

[0005] The present application is achieved by the following technical scheme:

[0006] In a first aspect, the present application provides a battery device. The battery device includes a first box body, a second box body, a first sealing member, a mounting member, and a protective member. The first box body includes a box body and a connecting portion connected to the outer periphery of the box body. The first box body and the second box body are mutually covered and jointly define a space for accommodating battery monomers. The side of the second box body facing the first box body has a first surface and a second surface. The first surface is connected to the connecting portion, and the second surface is provided on at least part of the outer periphery of the first surface. The second box body has a mounting hole that penetrates the second surface. At least part of the first sealing member is arranged between the connecting portion and the first surface. A part of the mounting member is located in the mounting hole, and another part protrudes from the second surface. The mounting member is used to connect with a battery replacement bracket. The protective member covers the second surface and the side of the connecting portion away from the first surface.

[0007] In the above scheme, by arranging the protective member and covering the second surface and the side of the connecting portion away from the first surface, the sealing interface between the first box body and the second box body can be shielded. On the one hand, it can improve the problem that external substances enter the sealing interface between the first box body and the second box body, and with the increase of the number of battery replacement, the external substances continuously act on the first sealing member, causing the structure of the first sealing member to be damaged and leading to the sealing failure of the battery device. On the other hand, it can improve the problem that the external substances accumulate between the battery replacement bracket and the battery device, causing the first sealing member to be in a long-term over-sealing state, resulting in excessive deformation of the first sealing member and sealing failure. Thus, the structural integrity of the first sealing member can be ensured to a certain extent, and the effective sealing effect can be achieved, thereby effectively improving the reliability of the battery device.

[0008] According to some embodiments of the present application, the protection member has a first through hole, and the hanging member passes through the first through hole.

[0009] In the above scheme, the first through hole is arranged on the protection member for the hanging member to pass through, so that the interference of the protection member on the hanging member can be reduced, the battery device can be effectively hung on the battery replacement support, and the battery replacement function is realized.

[0010] According to some embodiments of the present application, along the direction in which the first box body and the second box body cover each other, the side of the protection member away from the second box body is a flat surface, and is used to contact the battery replacement support.

[0011] In the above scheme, by arranging the side of the protection member away from the second box body as a flat surface, a larger contact area can be provided between the battery device and the battery replacement support, which can improve the structural stability between the battery device and the battery replacement support on the one hand, so that the battery device is stably hung on the electric device, for example, a vehicle; on the other hand, it can reduce the risk of local structural damage of the battery device due to excessive force on the structure caused by too small contact area, so that the battery device has higher reliability.

[0012] According to some embodiments of the present application, the protection member includes a first protection part and a second protection part connected to each other, the second protection part covers the second surface, and the first protection part covers the side of the connecting part away from the first surface.

[0013] In the above scheme, the protection member has a simple structure and is easy to manufacture. By covering the side of the connecting part away from the first surface with the first protection part, and covering the second surface with the second protection part connected to the first protection part, the part of the sealing interface formed by the connecting part, the first sealing member and the first surface can be effectively covered, thereby effectively reducing the risk of damage to the structure of the first sealing member caused by external substances entering the sealing interface, and further improving the reliability of the battery device.

[0014] According to some embodiments of the present application, the side of the first protection part away from the second protection part contacts the box body.

[0015] In the above scheme, the first protection part is arranged between the first box body and the second box body, so that the first protection member can be arranged to be shaped and fitted with the box body, thereby effectively reducing the risk of damage to the structure of the first sealing member caused by external substances entering the sealing interface through the gap between the first protection member and the first box body.

[0016] According to some embodiments of the present application, along the direction in which the first box body points to the second box body, the second protection part protrudes from the first protection part.

[0017] In the scheme, the second protection part protrudes from the first protection part in the direction of the first box body pointing to the second box body, so that the structural strength of the protection part is improved, the influence of external substances on the protection part caused by impact is effectively reduced, and the protection part plays a good protection role on the sealing interface and the first sealing part.

[0018] According to some embodiments of the present application, the second protection part is connected to the second surface through the first connecting part.

[0019] In the scheme, the second protection part is connected to the second surface through the first connecting part, so that the part of the protection part exposed to the outside of the sealing interface is covered stably, and the connection structure of the protection part and the first box body and the second box body does not interfere with the first sealing part, so that the first sealing part can effectively play a sealing role.

[0020] According to some embodiments of the present application, the first connecting part includes a threaded part, and the second protection part has a counterbore, and a part of the threaded part is arranged in the counterbore.

[0021] In the scheme, the counterbore is arranged on the second protection part, so that the threaded part can fix the second protection part on the second surface, so that the protection part stably and reliably covers the part of the sealing interface between the first box body and the second box body exposed to the outside, reduces the influence of external substances on the first sealing part, and improves the reliability of the battery device.

[0022] According to some embodiments of the present application, the connecting part is connected to the first surface through the second connecting part, and the side of the first protection part facing the connecting part has a groove for accommodating a part of the second connecting part.

[0023] In the scheme, the connecting part is connected to the first surface through the second connecting part, so that the connection relationship between the first box body and the second box body is stable and reliable, and at the same time, the groove is arranged on the inner side of the first protection part to accommodate a part of the second connecting part, so that the part of the second connecting part protruding from the connecting part does not interfere with the protection part and the battery replacement support, to a certain extent, ensure the effective replacement of the battery, and improve the energy supplement efficiency of the vehicle.

[0024] According to some embodiments of the present application, the first surface and the second surface are flush with each other.

[0025] In the scheme, by setting the first surface and the second surface to be flush with each other, that is, coplanar, the surface of the second box facing the side of the first box can be a flat surface, which can reduce the requirement for assembly tolerance between the first box and the second box, improve the assembly efficiency of the two, on the other hand, it can provide more space for the assembly action in the direction in which the first surface and the second surface are side by side, thereby reducing the risk of interference between the structure of the battery device and the operating workers or operating machines during the assembly of the first box and the second box, and facilitating the improvement of the assembly efficiency of the battery device.

[0026] According to some embodiments of the present application, the mounting hole has a hole diameter greater than or equal to 26 mm.

[0027] In the scheme, by setting the hole diameter of the mounting hole to be greater than or equal to 26 mm, on the one hand, it can provide a mounting member of corresponding size to pass through, so that the mounting member has appropriate structural strength, thereby facilitating the stable mounting relationship between the battery device and the battery replacement support, and further ensuring that the battery device provides stable electric energy to the vehicle, so that the vehicle has high reliability; on the other hand, it can meet the size requirement of the sealing ring in the related art, so as to assemble the sealing ring in the mounting hole and improve the sealing between the mounting hole and the mounting member.

[0028] According to some embodiments of the present application, the battery device further comprises a second sealing member, the second sealing member is arranged around the mounting member, the hole wall of the mounting hole is provided with a mounting groove, and the second sealing member is arranged in the mounting groove. In the direction in which the first box and the second box are overlapped with each other, a part of the projection of the second sealing member falls on the first surface, and another part falls on the second surface.

[0029] In the scheme, the space corresponding to the first surface and the space corresponding to the second surface of the second box are used to provide a mounting groove with appropriate size for the second sealing member, so that the second sealing member forms a good seal between the mounting hole and the mounting member, reduces the risk of external substances entering between the mounting hole and the mounting member affecting the mounting of the mounting member on the battery replacement support, and to a certain extent, ensures the battery replacement efficiency and reliability between the battery device and the battery replacement support.

[0030] According to some embodiments of the present application, in the direction in which the first box and the second box are overlapped with each other, the distance between the part of the second sealing member located in the mounting groove and facing the side of the first box and the second surface is not less than 5 mm and not more than 10 mm.

[0031] In the above scheme, by setting the distance between the side of the second sealing member facing the first box and the second surface to be no less than 5 mm, the risk of the second sealing member coming out of the mounting groove can be effectively reduced, so that the second sealing member is stably arranged between the mounting member and the hole wall of the mounting hole, thereby playing an effective sealing role, which is beneficial to improving the battery replacement quality and the battery replacement reliability. By setting the distance between the side of the second sealing member facing the first box and the second surface to be no more than 10 mm, the machining size requirement of processing the side of the second box facing the first box to form the mounting groove can be met, the machining difficulty of the mounting groove is reduced, and the manufacturing efficiency of the battery device is improved.

[0032] According to some embodiments of the present application, the outer edge of the first sealing member is recessed towards the direction of the space corresponding to the position of the mounting member to form a avoiding part, and the avoiding part is used to avoid the mounting member.

[0033] In the above scheme, by setting the avoiding part on the outer edge of the first sealing member, on the one hand, the mounting member can be avoided, and the risk of mutual interference between the mounting member and the first sealing member, which causes damage to the structure of the first sealing member, is reduced, and on the other hand, the first sealing member has a larger sealing area to have good sealing performance.

[0034] According to some embodiments of the present application, in the direction of the first surface pointing to the second surface, the distance between the avoiding part and the center of the mounting hole is greater than or equal to 5 mm and less than or equal to 17 mm.

[0035] In the above scheme, by setting the distance between the avoiding part and the center of the mounting hole to be greater than or equal to 5 mm, the risk of mutual interference between the first sealing member and the mounting member can be reduced, so that the mounting reliability between the battery device and the battery replacement support is high; by setting the distance between the avoiding part and the center of the mounting hole to be less than or equal to 17 mm, the first sealing member has a larger sealing area, so that the sealing reliability between the first box and the second box is high; for this, by setting the distance between the avoiding part and the center of the mounting hole to be no less than 5 mm and no more than 17 mm, the mounting reliability between the battery device and the battery replacement support and the sealing reliability between the first box and the second box can be considered.

[0036] According to some embodiments of the present application, the distance between the avoiding part and the center of the mounting hole is greater than or equal to 11 mm and less than or equal to 15 mm.

[0037] In the above scheme, by setting the distance between the avoiding portion and the center of the mounting hole to be greater than or equal to 11 mm, the risk of mutual interference between the first sealing member and the mounting member can be effectively reduced, so that the mounting reliability between the battery device and the battery replacement support is high; by setting the distance between the avoiding portion and the center of the mounting hole to be less than or equal to 15 mm, the first sealing member can have a larger sealing area, so that the sealing reliability between the first box body and the second box body is high; in this regard, by setting the distance between the avoiding portion and the center of the mounting hole to be not less than 11 mm and not greater than 15 mm, the mounting reliability between the battery device and the battery replacement support and the sealing reliability between the first box body and the second box body can be effectively balanced.

[0038] According to some embodiments of the present application, the distance between the avoiding portion and the center of the mounting hole is equal to 12.2 mm.

[0039] In the above scheme, in terms of the size of the first sealing member in the related art, under the condition that the first surface and the second surface are flush, by setting the distance between the avoiding portion and the center of the mounting hole to be 12.2 mm, the size of the first sealing member can be wider, so that the first sealing member has a larger sealing area, thereby achieving good sealing effect.

[0040] According to some embodiments of the present application, in the direction of the second box body pointing to the first box body, the second surface protrudes from the first surface; or, in the direction of the second box body pointing to the first box body, the first surface protrudes from the second surface.

[0041] In the above scheme, in some embodiments, by setting the second surface to protrude from the first surface, on the one hand, the structural strength of the second box body can be improved, thereby improving the battery replacement life of the battery device, and on the other hand, under the condition that the protective member covers the second surface and the side of the connecting portion away from the first surface, the thickness of the protective member can be reduced, thereby reducing the material cost of the protective member and facilitating the control of the manufacturing cost of the battery device; in other embodiments, by setting the first surface to protrude from the second surface, the assembly difficulty of the first box body and the second box body can be effectively reduced, thereby facilitating the improvement of the manufacturing efficiency of the battery device.

[0042] According to some embodiments of the present application, the hardness of the protective member is greater than the hardness of the second box body.

[0043] In the above scheme, the protective member is used to contact the battery replacement support, and in this regard, by setting the hardness of the protective member to be greater than the hardness of the second box body, the problem that the second box body is squeezed and deformed due to the action force generated by battery replacement with the increase of the number of battery replacement can be effectively improved, so that the structure of the battery device is reliable and the reliability of the battery device is improved.

[0044] According to some embodiments of the present application, the material of the protective member includes polyamide and glass fiber.

[0045] In the above scheme, the material of the protection piece includes polyamide and glass fiber, so that the protection piece is convenient to manufacture and has high hardness, and the deformation and damage of the protection piece during long-term contact and extrusion of the battery device and the battery replacement support during battery replacement are ensured to a certain extent.

[0046] According to some embodiments of the present application, the first box body has a recess for avoiding the vehicle beam, the recess is arranged through the first direction, the number of the recesses is two, the two recesses are arranged in the second direction, and the first direction, the second direction and the direction in which the first box body and the second box body are overlapped with each other are perpendicular to each other. The protection piece extends in the second direction and is located on at least one side of the first box body in the first direction.

[0047] In the above scheme, the recess for avoiding the vehicle beam is arranged on the first box body, so that the vehicle beam can pass through the first box body in the first direction, the space in the depth direction of the recess is reasonably utilized, the space utilization inside the battery device is improved, on the one hand, more battery monomers can be accommodated to improve the volume energy density of the battery device; on the other hand, when the battery device is applied to the vehicle, the battery device and the vehicle beam jointly occupy part of the space, so that the vehicle structure is compact, and the advantages of improving the ground clearance or improving the load capacity can be obtained.

[0048] In a second aspect, some embodiments of the present application also provide a vehicle, which comprises a battery replacement support and the battery device provided in the first aspect. The battery device is mounted on the battery replacement support through the mounting piece. Wherein, the side of the protection piece away from the second box body is in contact with the battery replacement support.

[0049] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0051] Figure 1 It is a schematic diagram of the vehicle in some embodiments of the present application;

[0052] Figure 2 It is a perspective view of the battery device and the battery replacement support in some embodiments of the present application;

[0053] Figure 3A schematic view of a battery device and a battery replacement support in some embodiments of the present application;

[0054] Figure 4 A perspective exploded view of a battery device and a battery replacement support in some embodiments of the present application;

[0055] Figure 5 A structural schematic view of a battery device in some embodiments of the present application;

[0056] Figure 6 A Figure 5 enlarged view of A in FIG. 10;

[0057] Figure 7 An internal schematic view of a partial structure of a battery device in some embodiments of the present application;

[0058] Figure 8 A side view of a battery device in some embodiments of the present application;

[0059] Figure 9 A Figure 8 enlarged view of B in FIG. 11;

[0060] Figure 10 A structural schematic view of a guard in some embodiments of the present application;

[0061] Figure 11 An internal structural schematic view of a battery device in some embodiments of the present application;

[0062] Figure 12 A Figure 11 enlarged view of C in FIG. 12;

[0063] Figure 13 A schematic view of a partial structure of a battery cell in some embodiments of the present application;

[0064] Figure 14 A schematic view of a partial structure of a battery device in some other embodiments of the present application;

[0065] Figure 15 A schematic view of a partial structure of a battery device in some other embodiments of the present application.

[0066] Icon: 1000-vehicle; 100-battery device; 200-controller; 300-motor; 400-battery replacement support; 401-support structure; 500-longitudinal beam; 10-first box body; 11-box body; 12-connection part; 13-second connection part; 14-avoidance groove; 20-second box body; 21-first wall; 22-second wall; 23-first surface; 24-second surface; 25-hanging hole; 250-mounting groove; 30-first sealing part; 31-avoidance part; 310-first section; 311-second section; 312-third section; 313-fourth section; 40-hanging part; 41-lock rod; 42-lock head; 50-protection part; 51-first through hole; 52-first protection part; 520-first edge; 521-second edge; 522-groove; 53-second protection part; 530-first connection part; 531-counterbore; 60-second sealing part; x-first direction; y-second direction; z-direction in which the first box body and the second box body cover each other. DETAILED DESCRIPTION

[0067] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0068] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the 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. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0069] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to the other embodiments.

[0070] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection", "attached" should be broadly interpreted, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] The term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0072] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length and width of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0073] "Multiple" appearing in the present application means two or more (including two).

[0074] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0075] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0076] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft package battery cell or other shaped battery cell. The prismatic battery cell includes but is not limited to a square cell, a blade cell, a multi-prismatic battery, for example, a hexagonal prism battery, etc.

[0077] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component.

[0078] In some embodiments, a battery cell assembly is typically formed by arranging a plurality of battery cells. For example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into a single module. For example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0079] In some embodiments, the battery device can be a battery pack, which includes a housing and one or more battery cell assemblies housed in the housing.

[0080] For example, the battery cell assembly can be a battery module, which can be housed in the housing by fixing the battery module in the housing.

[0081] For example, the battery cell assembly can also be housed in the housing by directly fixing a plurality of battery cells in the housing.

[0082] For example, the housing can include a first housing and a second housing. The first housing and the second housing are coupled so that an enclosed space is formed inside the housing to accommodate the battery cell assembly. Here, the enclosed means covered or closed, which can be sealed or unsealed. The first housing can be a top cover or a bottom plate.

[0083] For example, the housing can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that an enclosed space is formed inside the housing to accommodate the battery cell assembly.

[0084] For example, the housing can be part of the chassis structure of a vehicle. For example, the top cover of the housing can be at least part of the floor of the vehicle, or the frame of the housing can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0085] The battery device has the advantages of high energy density, small environmental pollution, large power density, long service life, wide adaptation range, and small self-discharge coefficient, and is an important part of the development of new energy. The development of battery technology needs to consider many design factors, such as energy density, cycle life, discharge capacity, and other performance parameters, and the reliability of the battery device.

[0086] Currently, new energy vehicles often use the battery replacement mode to supplement the power loss during driving, that is, the power loss during driving of the new energy vehicle is supplemented in time by replacing the battery device. In the related technology, the battery device includes a first box body, a second box body, a battery monomer, a first sealing element, and a mounting element. The first box body and the second box body are mutually covered and jointly define a space for accommodating the battery monomer. The first sealing element is arranged between the first box body and the second box body, and the first box body, the first sealing element, and the second box body are fastened together by a fastener to form a sealing interface. In order to avoid the fastener and reduce the interference of the fastener on the battery replacement support, the second box body forms a boss outside the sealing interface, and the mounting element is arranged at the position of the boss to mount the battery device on the battery replacement support to realize the battery replacement function.

[0087] However, due to the existence of the boss and the assembly tolerance between the first box body and the second box body, a gap is formed between the boss and the sealing interface, and external substances such as sand and stones are easily accumulated. In the process of frequent battery replacement, the accumulated external substances such as sand and stones are extruded, and there is a risk of entering the sealing interface to cause damage to the structure of the first sealing element, and there is a risk of external substances accumulating between the battery replacement support and the battery device, causing the first sealing element to be in a long-term over-sealed state, resulting in excessive deformation of the first sealing element and causing sealing failure, which affects the reliability of the battery device.

[0088] In view of this, in order to improve the problem of accumulation of external substances such as sand and stones and invasion of the sealing interface to cause damage to the structure of the first sealing element, some embodiments of the present application provide a battery device, which includes a first box body, a second box body, a first sealing element, a mounting element, and a protective element. The first box body includes a box body and a connecting portion connected to the outer periphery of the box body. The first box body and the second box body are mutually covered and jointly define a space for accommodating the battery monomer, and the second box body has a first surface and a second surface facing the first box body. The first surface is connected to the connecting portion, and the second surface is arranged at least part of the outer periphery of the first surface. The second box body has a mounting hole penetrating through the second surface. At least part of the first sealing element is arranged between the connecting portion and the first surface. Part of the mounting element is located in the mounting hole, and the other part protrudes from the second surface. The mounting element is used to connect with the battery replacement support. The protective element covers the second surface and the side of the connecting portion away from the first surface.

[0089] In the above scheme, by arranging the protective piece, and the protective piece covering the second surface and the side of the connecting portion away from the first surface, the sealing interface between the first box body and the second box body can be shielded, which can improve the problem that external substances enter the sealing interface between the first box body and the second box body, and with the increase of the number of battery replacement, the external substances continuously act on the first sealing piece, causing the structure of the first sealing piece to be damaged, resulting in the sealing failure of the battery device. On the other hand, it can improve the problem that the external substances accumulate between the battery replacement support and the battery device, causing the first sealing piece to be in an over-sealed state for a long time, causing the first sealing piece to be deformed excessively and fail to seal, thereby ensuring the structural integrity of the first sealing piece to a certain extent, so as to effectively seal, and thus effectively improve the reliability of the battery device.

[0090] The battery device disclosed in the embodiments of the present application can be used in vehicles, but is not limited to this. It can also be used in other electric devices with battery replacement function, including but not limited to ships, aircraft and other devices with battery replacement function.

[0091] The following embodiments are described taking a vehicle as an example for convenience of description.

[0092] Please refer to Figure 1 , Figure 1 is a schematic view of a vehicle 1000 in 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 electric automobile or a range extended automobile. The type of the vehicle 1000 can be a car, an off-road vehicle, a heavy truck or a bus, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000, which is used for the circuit system of the vehicle 1000, for example, for the working power demand of the vehicle 1000 during starting, navigation and running.

[0093] The vehicle 1000 can also 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, for the working power demand of the vehicle 1000 during starting, navigation and running.

[0094] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0095] In some embodiments, the bottom of the vehicle 1000 is provided with a battery replacement bracket 400, which can be assembled on the frame of the vehicle 1000, and the battery replacement bracket 400 is detachably connected with the battery device 100, so that the vehicle 1000 has the battery replacement function.

[0096] Exemplarily, the battery replacement bracket 400 has a mounting hole, and the battery device 100 has a mounting piece 40, which can be inserted into the mounting hole and locked on the battery replacement bracket 400.

[0097] Some embodiments of the present application provide a battery device 100, which is shown in Figures 2-7 , Figure 2 FIG. 1 is a perspective view of the battery device 100 and the battery replacement bracket 400 according to some embodiments of the present application, Figure 3 FIG. 2 is a schematic view of the battery device 100 and the battery replacement bracket 400 according to some embodiments of the present application, Figure 4 FIG. 3 is a perspective exploded view of the battery device 100 and the battery replacement bracket 400 according to some embodiments of the present application, Figure 5 FIG. 4 is a structural schematic view of the battery device 100 according to some embodiments of the present application, Figure 6 FIG. 5 is an enlarged view of area A in FIG. 4, Figure 5 FIG. 6 is an internal schematic view of the partial structure of the battery device 100 according to some embodiments of the present application. Figure 7

[0098] The battery device 100 includes a first box 10, a second box 20, a first sealing piece 30, a mounting piece 40, and a protective piece 50. The first box 10 includes a box body 11 and a connecting portion 12 connected to the outer periphery of the box body 11. The first box 10 and the second box 20 are mutually covered and jointly define a space for accommodating battery monomers. The side of the second box 20 facing the first box 10 has a first surface 23 and a second surface 24. The first surface 23 is connected with the connecting portion 12, and the second surface 24 is arranged on at least part of the outer periphery of the first surface 23. The second box 20 has a mounting hole 25 penetrating through the second surface 24. At least part of the first sealing piece 30 is arranged between the connecting portion 12 and the first surface 23. Part of the mounting piece 40 is located in the mounting hole 25, and the other part protrudes from the second surface 24. The mounting piece 40 is used to connect with the battery replacement bracket 400. The protective piece 50 covers the side of the second surface 24 and the connecting portion 12 away from the first surface 23.

[0099] ​The first box body 10 and the second box body 20 are connected to each other and jointly define a space for accommodating the battery cell. Alternatively, the first box body 10 and the second box body 20 can each be a hollow structure with one open side, and the open sides of the first box body 10 and the second box body 20 are matched with each other to jointly define the space. Alternatively, the first box body 10 can be a hollow structure with one open end, and the second box body 20 can be a plate-shaped structure, and the second box body 20 is arranged at the open end of the first box body 10 to jointly define the space. Alternatively, the battery cell arranged in the space can be one or a plurality of battery cells.

[0100] For example, the battery device 100 is provided with a plurality of battery cells, and the plurality of battery cells can be connected in series, connected in parallel, or connected in a mixed manner. The mixed connection means that the plurality of battery cells are connected in series and in parallel. The plurality of battery cells can be directly connected in series, connected in parallel, or connected in a mixed manner, and the plurality of battery cells are accommodated in the closed space. Of course, the battery device 100 can also be that the plurality of battery cells are connected in series, connected in parallel, or connected in a mixed manner to form a battery cell group, and the plurality of battery cell groups are connected in series, connected in parallel, or connected in a mixed manner to form an integral whole and are accommodated in the space jointly defined by the first box body 10 and the second box body 20.

[0101] In some embodiments of the present application, the second box body 20 is located below the first box body 10 in the direction of gravity, that is, the second box body 20 can be a lower box body, and the first box body 10 can be an upper box body.

[0102] Alternatively, the materials of the first box body 10 and the second box body 20 can be the same or different. The material of the first box body 10 can be a metal material such as steel, aluminum, stainless steel, or aluminum alloy, or a non-metallic material such as plastic. The material of the second box body 20 can be a metal material such as steel, aluminum, stainless steel, or aluminum alloy, or a non-metallic material such as plastic. For example, the material of the second box body 20 is aluminum alloy, and the material of the first box body 10 is plastic. For example, the material of the second box body 20 is aluminum alloy, and the material of the first box body 10 is aluminum alloy.

[0103] The first box body 10 and the second box body 20 are connected to each other, and the connection modes of the two are various, including but not limited to riveting, welding, threaded connection, or clamping.

[0104] The first box body 10 includes a box body 11 and a connecting portion 12. Alternatively, referring to Figure 6The box body 11 can be a hollow structure with one side open, and the connecting portion 12 is arranged on the open side of the box body 11 and located on the outer periphery of the box body 11. For example, the connecting portion 12 can be a flange formed on the edge of the box body 11, and the surface of the connecting portion 12 facing the second box body 20 is a flat surface to enable the second box body 20 to be attached. Alternatively, the connecting portion 12 can be a sheet structure surrounding the box body 11, or the connecting portion 12 can be a sheet structure arranged on the outer periphery of the box body 11 and not completely surrounding the box body 11. Alternatively, the box body 11 can also be a plate structure, and the connecting portion 12 is arranged on the outer periphery of the box body 11 for connection with the second box body 20.

[0105] In some embodiments, the second box body 20 can be a hollow structure with one side open. For example, the second box body 20 includes a bottom wall and a side wall, and the side wall of the second box body 20 facing the first box body 10 can be the side wall away from the bottom wall.

[0106] Please refer to Figure 6 and Figure 7 The side of the second box body 20 facing the first box body 10 has a first surface 23, which can be a flat surface. The first surface 23 corresponds to the connecting portion 12 for connection with the connecting portion 12. At least part of the first sealing member 30 is arranged between the first surface 23 and the connecting portion 12, and the first sealing member 30 is extruded by the first box body 10 and the second box body 20 to deform, thereby achieving sealing of the first box body 10 and the second box body 20.

[0107] The "first surface 23 connected with the connecting portion 12" can be understood as the first surface 23 and the connecting portion 12 corresponding to each other, and being directly or indirectly connected as a whole, for example, the connecting portion 12 is connected with the first surface 23 through other structural members. In some embodiments, in the direction of the first box body 10 pointing to the second box body 20, the connecting portion 12 can be projected on the first surface 23, or the projection of the connecting portion 12 can coincide with the first surface 23.

[0108] In some embodiments, the first surface 23 can surround the box body 11, or be arranged on part of the outer periphery of the box body 11. Alternatively, the connecting portion 12 surrounds the outer side of the box body 11, and correspondingly, the first surface 23 surrounds the outer side of the box body 11 to correspond to the connecting portion 12, so that the first box body 10 is supported by the connecting portion 12 and the first surface 23 to cover the second box body 20.

[0109] For example, the connection relationship between the first box body 10 and the second box body 20 includes connection through fasteners. One end of the fastener passes through the connecting portion 12, the first sealing member 30 is fixed to the first surface 23, and the first sealing member 30 is clamped between the connecting portion 12 and the first surface 23 through the fastener.

[0110] Please refer to Figure 6 and Figure 7 The second surface 24 is arranged on at least a part of the outer periphery of the first surface 23. The second surface 24 can be in a ring structure, arranged on the side of the first surface 23 facing away from the space, or arranged on the outer periphery of the opening side of the second box 20.

[0111] For example, the second box 20 is in a square structure, the side wall includes two first side walls and two second side walls, the two first side walls are arranged opposite to each other, and the two second side walls are arranged opposite to each other. The second surface 24 is arranged on the side of the two first side walls facing away from the bottom wall, and the first surface 23 is arranged on the side of the two first side walls facing away from the bottom wall and on the side of the two second side walls facing away from the bottom wall.

[0112] The first sealing member 30 can be in an elastic structure, for example, the material of the first sealing member 30 includes plastic. For example, the first sealing member 30 is a sealing gasket, at least a part of the sealing gasket is arranged between the connecting portion 12 and the first surface 23. Alternatively, a part of the first sealing member 30 is arranged between the connecting portion 12 and the first surface 23, and another part of the first sealing member 30 is arranged between the connecting portion 12 and the side of the first surface 23 facing away from the space, i.e. the other part of the first sealing member 30 is arranged on the outside of the connecting portion 12 and the first surface 23, and can extend to the second surface 24.

[0113] In some embodiments, the connecting portion 12, the first sealing member 30 and the first surface 23 jointly form a sealing interface, which reduces the invasion of external substances into the inside of the battery device 100.

[0114] Please refer to Figure 6 and Figure 7 The second box 20 has a mounting hole 25, which can pass through the second surface 24, so that the mounting member 40 can pass through. The mounting hole 25 can be a square hole, a circular hole, a triangular hole or a hole structure of other shapes. In some embodiments of the present application, the mounting hole 25 is exemplified as a circular hole.

[0115] Alternatively, the diameter of the mounting hole 25 can correspond to the diameter of the mounting member 40. For example, the diameter of the mounting hole 25 can be greater than or equal to the diameter of the mounting member 40. The mounting member 40 is a structural member for mounting the battery device 100 on the battery replacement support 400.

[0116] Alternatively, please refer to Figures 2-4As a way of battery replacement, the battery device 100 is assembled on the battery replacement support 400 from bottom to top. For example, when the battery device 100 is carried or lifted into position, the hanging member 40 can extend into the hanging perforation of the battery replacement support 400, and by changing the posture of the hanging member 40, part of the hanging member 40 can be hung on the battery replacement support 400, so as to hang the entire battery device 100 on the battery replacement support 400. Optionally, as shown in FIG. 1B, the hanging member 40 can be provided with a locking rod 41 and a locking head 42. The locking rod 41 is located in the hanging hole 25, and the locking head 42 is located outside the hanging hole 25 and is used to cooperate with the battery replacement support 400. When the battery device 100 is carried or lifted into position, the locking head 42 can pass through the hanging perforation. By rotating the locking rod 41, the locking head 42 can be dislocated from the hanging perforation, so as to be lapped on the battery replacement support 400, and the battery device 100 is hung on the battery replacement support 400. Conversely, when it is necessary to disassemble the battery device 100, the locking rod 41 is rotated, so that the locking head 42 is aligned with the hanging perforation. A downward force is applied to the battery device 100, so that the locking head 42 is disengaged from the hanging perforation, so that the battery device 100 is disengaged from the battery replacement support 400. Figure 6 The hanging member 40 includes a locking rod 41 and a locking head 42. The locking rod 41 is located in the hanging hole 25, and the locking head 42 is located outside the hanging hole 25 and is used to cooperate with the battery replacement support 400. When the battery device 100 is carried or lifted into position, the locking head 42 can pass through the hanging perforation. By rotating the locking rod 41, the locking head 42 can be dislocated from the hanging perforation, so as to be lapped on the battery replacement support 400, and the battery device 100 is hung on the battery replacement support 400. Conversely, when it is necessary to disassemble the battery device 100, the locking rod 41 is rotated, so that the locking head 42 is aligned with the hanging perforation. A downward force is applied to the battery device 100, so that the locking head 42 is disengaged from the hanging perforation, so that the battery device 100 is disengaged from the battery replacement support 400.

[0117] Please refer to Figure 6 The hanging member 40 is located outside the sealing interface, that is, the hanging member 40 is located outside the connection portion 12, the first sealing member 30, and the first surface 23.

[0118] The protection member 50 is used to cover the sealing interface, so as to reduce the effect of external substances or the entry of external substances into the sealing interface, so as to prevent the first sealing member 30 from being damaged by external substances. Figure 7 The protection member 50 covers the second surface 24 and the side of the connection portion 12 away from the first surface 23, so that the sealing interface is covered.

[0119] Optionally, the protection member 50 can be attached to at least part of the second surface 24, for example, the protection member 50 can attach part of the second surface 24. At the part of the second surface 24 corresponding to the hanging hole 25, the protection member 50 is spaced apart.

[0120] Optionally, the protection member 50 is provided at the end of the first wall 21 away from the bottom wall. When the battery device 100 is hung on the battery replacement support 400, the surface of the protection member 50 away from the first wall 21 is in contact with the battery replacement support 400.

[0121] In some embodiments, the protection member 50 is generally plate-shaped. Part of the inner side of the protection member 50 covers at least part of the second surface 24, and the other part covers the outer side of the connection portion 12. The outer side of the protection member 50 is used to contact the battery replacement support 400.

[0122] In some embodiments, the shield 50 is connected to the second case 20, for example, the shield 50 is connected to the second surface 24, and the connection manner between the two includes but is not limited to adhesion, welding, clamping, riveting, threaded connection or other connection manners.

[0123] In some other embodiments, the shield 50 is connected to the first case 10, for example, the shield 50 is connected to the outer side of the connecting part 12, and the connection manner between the two includes but is not limited to adhesion, welding, clamping, riveting, threaded connection or other connection manners.

[0124] For example, during the assembly of the battery device 100, after the first case 10 is covered on the second case 20 and the connecting part 12 and the first surface 23 are connected to each other, the shield 50 is arranged on the second surface 24 and the outer side of the connecting part 12.

[0125] The material of the shield 50 includes but is not limited to aluminum, aluminum alloy, steel, polymer material or other materials. Optionally, the material of the shield 50 can be stainless steel. Optionally, the material of the shield 50 can include polyamide and glass fiber.

[0126] In the above scheme, by arranging the shield 50 and the shield 50 covering the second surface 24 and the side of the connecting part 12 away from the first surface 23, the sealing interface between the first case 10 and the second case 20 can be shielded, which can improve the problem that the external material enters the sealing interface between the first case 10 and the second case 20, and with the increase of the number of battery replacement, the external material continuously acts on the first sealing part 30, causing the structure of the first sealing part 30 to be damaged, resulting in the sealing failure of the battery device 100, and can improve the problem that the external material is accumulated between the battery replacement support 400 and the battery device 100, causing the first sealing part 30 to be in an over-sealed state for a long time, causing the first sealing part 30 to be deformed excessively and fail to seal, thereby being able to ensure the structural integrity of the first sealing part 30 to a certain extent, so as to effectively seal, and thus the reliability of the battery device 100 can be effectively improved.

[0127] According to some embodiments of the present application, the shield 50 has a first through hole 51, and the mounting part 40 passes through the first through hole 51.

[0128] Please refer to Figure 6 , the shield 50 has a first through hole 51, and the first through hole 51 is arranged corresponding to the mounting hole 25 to allow the mounting part 40 to pass out.

[0129] Optionally, along the second direction y, a plurality of mounting holes 25 are arranged at intervals and respectively penetrate the second surface 24, the shield 50 extends along the second direction y, and a plurality of first through holes 51 are arranged on the shield 50 along the second direction y, and the first through holes 51 correspond to the mounting holes 25 one by one.

[0130] In the above scheme, the first through hole 51 is arranged on the protective piece 50 for the mounting piece 40 to pass through, so as to reduce the interference of the protective piece 50 on the mounting piece 40, so that the battery device 100 can be effectively mounted on the battery replacement support 400 to realize the battery replacement function.

[0131] In some other embodiments of the present application, the number of protective pieces 50 is multiple, and the mounting hole 25 is located between two adjacent protective pieces 50, that is, the protective piece 50 is not provided with the first through hole 51, and the protective piece 50 is arranged in an intermittent structure to form a gap capable of avoiding the mounting piece 40.

[0132] According to some embodiments of the present application, please refer to Figure 7 , along the direction z in which the first box and the second box cover each other, the side of the protective piece 50 away from the second box 20 is a flat surface and is used to contact the battery replacement support 400.

[0133] The flat surface can be understood as a flat surface without obvious concave-convex surface.

[0134] In some embodiments, the side of the protective piece 50 away from the second box 20 is a flat surface, and when the battery device 100 is mounted on the battery replacement support 400, the side of the protective piece 50 away from the second box 20 can be attached to the battery replacement support 400, and the two surfaces contact each other, reducing the risk of damage to the structure of the protective piece 50 or the battery replacement support 400 due to the impact of the force in the vertical direction when the vehicle 1000 is running or during the battery replacement process.

[0135] In the above scheme, by arranging the side of the protective piece 50 away from the second box 20 as a flat surface, the battery device 100 and the battery replacement support 400 can have a larger contact area, which can improve the structural stability between the battery device 100 and the battery replacement support 400, so that the battery device 100 is stably mounted on the electric equipment, such as the vehicle 1000; on the other hand, it can reduce the risk of structural damage of the battery device 100 due to the too small contact area and the excessive local structure stress, so that the battery device 100 has higher reliability.

[0136] In some other embodiments of the present application, the side of the protective piece 50 away from the second box 20 can not be a flat surface. For example, the side of the protective piece 50 away from the second box 20 corresponding to the part of the second surface 24 can protrude from the part corresponding to the connecting part 12, or be recessed from the side corresponding to the connecting part 12.

[0137] According to some embodiments of the present application, please refer to Figures 8-10 , Figure 8 is a side view of the battery device 100 in some embodiments of the present application, Figure 9 isFigure 8 An enlarged view at B, Figure 10 Fig. 1 is a schematic view of a protective member 50 according to some embodiments of the present application.

[0138] The protective member 50 comprises a first protective portion 52 and a second protective portion 53 connected to each other, the second protective portion 53 covers the second surface 24, and the first protective portion 52 covers the side of the connecting portion 12 away from the first surface 23.

[0139] The first protective portion 52 is the part of the protective member 50 corresponding to the connecting portion 12, and the second protective portion 53 is the part of the protective member 50 corresponding to the second surface 24, the first protective portion 52 and the second protective portion 53 are connected to each other so as to enable the protective member 50 to span the sealing interface and thereby cover the sealing interface.

[0140] In some embodiments, the first protective portion 52 and the second protective portion 53 can be integrally formed or can be separate structures. Optionally, the first protective portion 52 and the second protective portion 53 are integrally formed by an injection molding process. Optionally, the first protective portion 52 and the second protective portion 53 are manufactured separately and are combined into one by welding, bonding, riveting, threaded connection or other connection methods.

[0141] In the above scheme, the protective member 50 has a simple structure and is easy to manufacture. The first protective portion 52 covers the side of the connecting portion 12 away from the first surface 23, and the second protective portion 53 connected to the first protective portion 52 covers the second surface 24, which can effectively cover the part of the sealing interface formed by the connecting portion 12, the first sealing member 30 and the first surface 23 exposed to the outside, thereby effectively reducing the risk of external substances entering the sealing interface and causing damage to the structure of the first sealing member 30, and further improving the reliability of the battery device 100.

[0142] According to some embodiments of the present application, the side of the first protective portion 52 away from the second protective portion 53 is in contact with the box body 11.

[0143] Please refer to Figure 9 and Figure 10 , the side of the first protective portion 52 away from the second protective portion 53 is in contact with the box body 11, that is, the first protective portion 52 and the box body 11 are in contact with each other.

[0144] Optionally, the connecting portion 12 is a flange structure arranged at the opening side of the box body 11, and the connecting portion 12 is connected to the wall surface of the box body 11 through a circular arc transition. Correspondingly, the side of the first protective portion 52 away from the second protective portion 53 comprises a first edge 520 and a second edge 521, the first edge 520 is a straight edge, and the second edge 521 is a circular arc edge, the first edge 520 and the second edge 521 are connected to each other, the first edge 520 is in contact with the wall surface of the box body 11, and the second edge 521 is in contact with the part of the circular arc transition between the box body 11 and the connecting portion 12.

[0145] In the above scheme, the first protective piece is arranged between the first box body 10 and the second box body 20, so that the first protective piece 50 can be arranged to be in a shape conforming to the box body 11, and the risk of damage to the structure of the first sealing piece 30 caused by the gap between the first protective piece 50 and the first box body 10 through which the external substances enter the sealing interface can be effectively reduced.

[0146] According to some embodiments of the present application, referring to Figure 9 and Figure 10 , the second protective part 53 protrudes from the first protective part 52 in the direction from the first box body 10 to the second box body 20.

[0147] In some embodiments, the second protective part 53 protrudes from the first protective part 52 in the direction from the first box body 10 to the second box body 20 to avoid the connection part 12 and the first sealing piece 30.

[0148] Exemplarily, the size of the second protective part 53 protruding from the first protective part 52 is greater than or equal to the thickness of the connection part 12 and the thickness of the first sealing piece 30.

[0149] In the above scheme, the second protective part 53 protrudes from the first protective part 52 in the direction from the first box body 10 to the second box body 20, which can improve the structural strength of the protective piece 50, effectively reduce the impact of external substances on the protective piece 50, and make the protective piece 50 play a good protective role on the sealing interface and the first sealing piece 30.

[0150] In some other embodiments of the present application, the protective piece 50 can be a flat plate, that is, the two surfaces of the protective piece 50 opposite to each other are flat surfaces in the direction z in which the first box body and the second box body cover each other. In some other embodiments of the present application, the first protective part 52 protrudes from the second protective part 53 in the direction from the first box body 10 to the second box body 20, for example, in the battery device 100 in the related art, the second protective part 53 is arranged on the boss, the first protective part 52 covers the side of the connection part 12 away from the first surface 23, or the boss is thinned to reduce the size of the boss, and the second protective part 53 is arranged on the boss with a reduced size, and the first protective part 52 covers the side of the connection part 12 away from the first surface 23.

[0151] According to some embodiments of the present application, referring to Figure 6 , the second protective part 53 is connected to the second surface 24 through the first connecting piece 530.

[0152] In some embodiments, the second protection part 53 is connected to the second surface 24 through the first connecting member 530, which includes but is not limited to an adhesive structure, a riveting structure, a clamping structure, a threaded connection structure or the like.

[0153] In some embodiments, the protection part 50 can be fixed to the second box body 20 through the first connecting member 530, and can also be fixed to the second box body 20 through other connecting members, and can also be fixed to the connecting part 12 or the box body 11 through other connecting members.

[0154] For example, the second protection part 53 of the protection part 50 is connected to the first surface 23 through the first connecting member 530, and the first protection part 52 is connected to the connecting part 12 through other connecting members.

[0155] In the above scheme, the second protection part 53 is connected to the second surface 24 through the first connecting member 530, which can stably cover the part of the sealing interface exposed to the outside by the protection part 50, and the connecting structure of the protection part 50 and the first box body 10 and the second box body 20 will not interfere with the first sealing part 30, so that the first sealing part 30 can effectively play a sealing role.

[0156] According to some embodiments of the present application, please refer to Figure 6 and Figure 10 , the first connecting member 530 includes a threaded member, and the second protection part 53 has a counterbore 531, and a part of the threaded member is arranged in the counterbore 531.

[0157] The first connecting member 530 is a threaded member, and the second surface 24 is formed with a corresponding threaded hole, and the first connecting member 530 passes through the second protection part 53 and is arranged in the threaded hole of the second surface 24.

[0158] Please refer to Figure 10 , the second protection part 53 has a counterbore 531, the counterbore 531 includes a first hole section and a second hole section, the first hole section is away from the second surface 24 relative to the second hole section, and the hole diameter of the first hole section is smaller than the hole diameter of the second hole section to form a step between the first hole section and the second hole section, and the head of the threaded member abuts against the step to fasten the protection part 50 to the second surface 24.

[0159] In the above scheme, by arranging the counterbore 531 in the second protection part 53, the threaded member can fix the second protection part 50 on the second surface 24, so that the protection part 50 stably and reliably covers the part of the sealing interface exposed to the outside between the first box body 10 and the second box body 20, reduces the influence of external substances on the first sealing part 30, and improves the reliability of the battery device 100.

[0160] In the above embodiment, the threaded part is hidden by the recess 531. In other embodiments, the second protection part 53 can not have the recess 531, and the head of the threaded part can be exposed.

[0161] According to some embodiments of the present application, the connecting part 12 is connected to the first surface 23 by the second connecting part 13, and the side of the first protection part 52 facing the connecting part 12 has a recess 522 for accommodating a part of the second connecting part 13.

[0162] Please refer to Figure 6 , Figure 9 and Figure 10 , the connecting part 12 is connected to the first surface 23 by the second connecting part 13, and a part of the second connecting part 13 is located on the side of the connecting part 12 facing away from the first surface 23. Optionally, the second connecting part 12 can be a threaded structure, the threaded segment of the threaded structure is screwed with the first surface 23 through the connecting part 12 and the first sealing part 30, and the head of the threaded structure abuts against the side of the connecting part 12 facing away from the first surface 23. Optionally, the second connecting part 12 can be a rivet structure.

[0163] In some embodiments, the side of the first protection part 52 facing the connecting part 12 can be attached to the connecting part 12, and the side of the first protection part 52 facing the connecting part 12 has a recess 522 for accommodating a part of the second connecting part 12.

[0164] In some embodiments, the side of the first protection part 52 facing the connecting part 12 can be spaced apart from the connecting part 12.

[0165] In the above scheme, the connecting part 12 is connected to the first surface 23 by the second connecting part 13, so that the connection between the first box body 10 and the second box body 20 is stable and reliable. At the same time, by providing the recess 522 on the inner side of the first protection part 52 to accommodate a part of the second connecting part 13, the part of the second connecting part 13 protruding from the connecting part 12 does not interfere with the protection part 50 and the battery replacement bracket 400, to a certain extent, ensuring the effective replacement of the battery and improving the energy supplement efficiency of the vehicle 1000.

[0166] According to some embodiments of the present application, the first surface 23 and the second surface 24 are flush with each other.

[0167] Please refer to Figure 6 and Figure 7 , the first surface 23 and the second surface 24 are flush with each other, that is, they are in the same plane.

[0168] It should be noted that in the battery device 100 of the related art, the part corresponding to the second surface 24 is formed with a boss to achieve the avoidance of the second connecting piece 13, so as to reduce the interference of the second connecting piece 13 on the battery replacement support 400. In some embodiments of the present application, the boss is removed to form the second surface 24 when the second box 20 is machined or manufactured, and the second surface 24 is flush with the first surface 23. By providing the protection piece 50, on the one hand, the sealing interface can be covered, and on the other hand, the avoidance of the second connecting piece 13 can be achieved.

[0169] In the above scheme, by setting the first surface 23 and the second surface 24 to be flush with each other, that is, coplanar, the surface of the second box 20 facing the side of the first box 10 can be a flat surface, which on the one hand can reduce the requirement for assembly tolerance between the first box 10 and the second box 20, improve the assembly efficiency of the two, and on the other hand, in the direction parallel to the first surface 23 and the second surface 24, a larger space can be provided for the assembly action, thereby reducing the risk of interference between the operator or operating machinery and the structural member of the battery device 100 during the assembly of the first box 10 and the second box 20, and facilitating the improvement of the assembly efficiency of the battery device 100.

[0170] According to some embodiments of the present application, the diameter of the mounting hole 25 is greater than or equal to 26 mm.

[0171] In some embodiments, the diameter of the mounting hole 25 is greater than or equal to 26 mm, for example, the diameter of the mounting hole 25 can be 26 mm, 27 mm, 28 mm, a larger value or any value between two adjacent values.

[0172] In the above scheme, by setting the diameter of the mounting hole 25 to be greater than or equal to 26 mm, on the one hand, the mounting piece 40 of the corresponding size can be provided to pass through, so that the mounting piece 40 has appropriate structural strength, thereby facilitating the stable mounting relationship between the battery device 100 and the battery replacement support 400, and further ensuring that the battery device 100 provides stable electric energy to the vehicle 1000, so that the vehicle 1000 has high reliability; on the other hand, the size requirement of the sealing ring in the related art can be met, so that the sealing ring can be assembled in the mounting hole 25, and the sealing property between the mounting hole 25 and the mounting piece 40 can be improved.

[0173] According to some embodiments of the present application, please refer to Figure 11 and Figure 12 , Figure 11 is a schematic view of the internal structure of the battery device 100 in some embodiments of the present application, Figure 12 is Figure 11 an enlarged view of C in

[0174] The battery device 100 further comprises a second seal 60, which is arranged around the mounting member 40. The hole wall of the mounting hole 25 is provided with a mounting groove 250, and the second seal 60 is arranged in the mounting groove. In the direction z in which the first case and the second case are overlapped with each other, a part of the projection of the second seal 60 falls on the first surface 23, and another part falls on the second surface 24.

[0175] The second seal 60 can be a sealing ring, which is sleeved on the mounting member 40, for example, the sealing ring is sleeved on the lock rod 41. The hole wall of the mounting hole 25 is provided with a mounting groove 250, which is an annular groove corresponding to the second seal 60, to accommodate the second seal 60.

[0176] In some embodiments of the present application, in the direction z in which the first case and the second case are overlapped with each other, a part of the projection of the second seal 60 falls on the first surface 23, and another part falls on the second surface 24, that is, the mounting groove 250 occupies a part of the second case 20 corresponding to the first surface 23, and a part of the second case 20 corresponding to the second surface 24.

[0177] Optionally, the first surface 23 and the second surface 24 are flush. The second case 20 is processed on the side facing the first case 10, so as to process the mounting groove on the hole wall of the mounting hole 25. Part of the mounting groove 250 can be deepened in the direction of the space, so as to occupy a part of the second case 20 corresponding to the first surface 23, so that the mounting groove 250 is appropriately sized to fit the second seal 60.

[0178] In the above scheme, the space of the second case 20 corresponding to the first surface 23 and the space of the second case 20 corresponding to the second surface 24 are used to provide the second seal 60 with a mounting groove of appropriate size, so that the second seal 60 forms a good seal between the mounting hole 25 and the mounting member 40, reduces the risk of external matter entering between the mounting hole 25 and the mounting member 40 to affect the mounting of the mounting member 40 on the battery replacement support 400, and to some extent ensures the battery replacement efficiency and reliability between the battery device 100 and the battery replacement support 400.

[0179] According to some embodiments of the present application, in the direction z in which the first case and the second case are overlapped with each other, the distance between the side of the part of the second seal 60 located in the mounting groove facing the first case 10 and the second surface 24 is not less than 5 mm and not more than 10 mm.

[0180] Please refer to Figure 12 The distance between the side of the part of the second seal 60 located in the mounting groove facing the first case 10 and the second surface 24 is J, and the value of J can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm or any value between two adjacent numbers.

[0181] In some embodiments, the distance between the side of the second sealing member 60 facing the first box 10 and the second surface 24 at the portion of the mounting groove can be regarded as the processing depth of the mounting groove.

[0182] In the above scheme, by setting the distance between the side of the second sealing member 60 facing the first box 10 and the second surface 24 to be not less than 5 mm, the risk of the second sealing member 60 coming out of the mounting groove can be effectively reduced, so that the second sealing member 60 is stably arranged between the mounting member 40 and the hole wall of the mounting hole 25, thereby playing an effective sealing role, which is beneficial to improving the battery replacement quality and the battery replacement reliability. By setting the distance between the side of the second sealing member 60 facing the first box 10 and the second surface 24 to be not more than 10 mm, the processing size requirement of processing the side of the second box 20 facing the first box 10 to form the mounting groove can be met, the processing difficulty of the mounting groove is reduced, and the manufacturing efficiency of the battery device 100 is improved.

[0183] According to some embodiments of the present application, please refer to Figure 13 , Figure 13 is a schematic view of a partial structure of a battery monomer in some embodiments of the present application.

[0184] The outer edge of the first sealing member 30 is recessed towards the space direction corresponding to the position of the mounting member 40 to form a avoiding part 31, and the avoiding part 31 is used for avoiding the mounting member 40.

[0185] The outer edge of the first sealing member 30 is the edge of the first sealing member 30 away from the space formed by the first box 10 and the second box 20. In some embodiments, the first sealing member 30 is a ring structure, and the outer edge of the first sealing member 30 can be the outer circumference of the first sealing member 30.

[0186] The avoiding part 31 is a part formed by the outer edge of the first sealing piece 30 being inwardly recessed, the avoiding part 31 is arranged corresponding to the mounting hole 25, and is used for avoiding the mounting piece 40 passing through the mounting hole 25, so as to reduce the mutual interference between the first sealing piece 30 and the mounting piece 40. In some embodiments, the outer edge of the first sealing piece 30 can include a first section 310, a second section 311, a third section 312 and a fourth section 313, the first section 310 is a part of the first sealing piece 30 farthest away from the space, the fourth section 313 is a part of the first sealing piece 30 closest to the space, the second section 311 and the third section 312 are located between two adjacent first sections 310, one end of the fourth section 313 is connected to one of the first sections 310 through the second section 311, and the other end of the fourth section 313 is connected to the other first section 310 through the third section 312, and the second section 311, the fourth section 313 and the third section 312 jointly form the avoiding part 31 recessed relative to the first section 310. In some embodiments, part of the mounting hole 25 is located between the second section 311 and the third section 312.

[0187] In the above scheme, by arranging the avoiding part 31 on the outer edge of the first sealing piece 30, on the one hand, the mounting piece 40 can be avoided, and the mutual interference between the mounting piece 40 and the first sealing piece 30 is reduced, so as to reduce the risk of the structure of the first sealing piece 30 being damaged, and on the other hand, the first sealing piece 30 can have a larger sealing area, so as to have good sealing performance.

[0188] According to some embodiments of the present application, please refer to Figure 13 , in the direction from the first surface 23 to the second surface 24, the distance between the avoiding part 31 and the center of the mounting hole 25 is greater than or equal to 5 mm and less than or equal to 17 mm.

[0189] In some embodiments, in the direction from the first surface 23 to the second surface 24, the distance between the avoiding part 31 and the center of the mounting hole 25 can be regarded as the distance between the fourth section 313 and the center of the mounting hole 25.

[0190] Please refer to Figure 13 , in the direction from the first surface 23 to the second surface 24, the distance between the avoiding part 31 and the center of the mounting hole 25 is L, and L can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm or any value between adjacent two values.

[0191] In the above scheme, by setting the distance between the avoiding portion 31 and the center of the mounting hole 25 to be greater than or equal to 5 mm, the risk of mutual interference between the first sealing member 30 and the mounting member 40 can be reduced, so that the mounting reliability between the battery device 100 and the battery replacement support 400 is high; by setting the distance between the avoiding portion 31 and the center of the mounting hole 25 to be less than or equal to 17 mm, the first sealing member 30 can have a larger sealing area, so that the sealing reliability between the first box body 10 and the second box body 20 is high; for this, by setting the distance between the avoiding portion 31 and the center of the mounting hole 25 to be not less than 5 mm and not greater than 17 mm, the mounting reliability between the battery device 100 and the battery replacement support 400 and the sealing reliability between the first box body 10 and the second box body 20 can be considered.

[0192] According to some embodiments of the present application, the distance between the avoiding portion 31 and the center of the mounting hole 25 is greater than or equal to 11 mm and less than or equal to 15 mm.

[0193] Referring to Figure 13 , in the direction from the first surface 23 to the second surface 24, the distance between the avoiding portion 31 and the center of the mounting hole 25 is L, and the value of L can be 11 mm, 12 mm, 13 mm, 14 mm, 15 mm or any value between adjacent two values.

[0194] In the above scheme, by setting the distance between the avoiding portion 31 and the center of the mounting hole 25 to be greater than or equal to 11 mm, the risk of mutual interference between the first sealing member 30 and the mounting member 40 can be effectively reduced, so that the mounting reliability between the battery device 100 and the battery replacement support 400 is high; by setting the distance between the avoiding portion 31 and the center of the mounting hole 25 to be less than or equal to 15 mm, the first sealing member 30 can have a larger sealing area, so that the sealing reliability between the first box body 10 and the second box body 20 is high; for this, by setting the distance between the avoiding portion 31 and the center of the mounting hole 25 to be not less than 11 mm and not greater than 15 mm, the mounting reliability between the battery device 100 and the battery replacement support 400 and the sealing reliability between the first box body 10 and the second box body 20 can be effectively considered.

[0195] According to some embodiments of the present application, the distance between the avoiding portion 31 and the center of the mounting hole 25 is equal to 12.2 mm.

[0196] Referring to Figure 13 , in the direction from the first surface 23 to the second surface 24, the distance between the avoiding portion 31 and the center of the mounting hole 25 is L, and the value of L can be 12.2 mm.

[0197] In the above scheme, in terms of the size of the first seal 30 in the related art, by setting the distance between the avoidance portion 31 and the center of the mounting hole 25 to 12.2 mm under the condition that the first surface 23 and the second surface 24 are flush, the size of the first seal 30 can be made wider, so that the first seal 30 has a larger sealing area, thereby playing a good sealing effect.

[0198] According to some embodiments of the present application, the second surface 24 protrudes from the first surface 23 in the direction in which the second box 20 points to the first box 10; or, the first surface 23 protrudes from the second surface 24 in the direction in which the second box 20 points to the first box 10.

[0199] In another embodiment, please refer to Figure 14 , Figure 14 FIG. 4 is a schematic view of a partial structure of the battery device 100 according to another embodiment of the present application, in which the second surface 24 protrudes from the first surface 23 in the direction in which the second box 20 points to the first box 10.

[0200] In this another embodiment, the second surface 24 protrudes from the first surface 23, that is, similar to the related art, a boss is formed on the side of the second box 20 facing the first box 10, and the size of the boss can be smaller than that of the boss in the related art, or consistent. By designing the size of the protection member 50, the protection member 50 can cover the second surface 24 and the side of the connecting portion 12 away from the first surface 23.

[0201] In other embodiments, please refer to Figure 15 , Figure 15 FIG. 5 is a schematic view of a partial structure of the battery device 100 according to another embodiment of the present application, in which the first surface 23 protrudes from the second surface 24 in the direction in which the second box 20 points to the first box 10.

[0202] In this another embodiment, the first surface 23 protrudes from the first surface 23, and by designing the size of the protection member 50, the protection member 50 can cover the second surface 24 and the side of the connecting portion 12 away from the first surface 23.

[0203] It should be noted that, in the battery device 100 of the related art, a portion corresponding to the second surface 24 is formed with a protrusion to achieve the avoidance of the second connecting piece 13, so as to reduce the interference of the second connecting piece 13 on the battery replacement support 400. In some embodiments of the present application, the protrusion is flattened when the second box 20 is machined or manufactured, so as to form the first surface 23 and the second surface 24 flush with each other, or the protrusion is cut out partially, so as to form the first surface 23 and the second surface 24 protruding from the first surface 23, or the protrusion is completely cancelled and further part of the material is removed, so as to form the first surface 23 and the second surface 24 recessed from the first surface 23. The size of the protective piece 50 is designed to cover the sealing interface on the one hand, and to achieve the avoidance of the second connecting piece 13 on the other hand.

[0204] In the above scheme, in some embodiments, by setting the second surface 24 to protrude from the first surface 23, on the one hand, the structural strength of the second box 20 can be improved, so that the battery replacement life of the battery device 100 is improved, and on the other hand, under the condition that the protective piece 50 covers the second surface 24 and the side of the connecting part 12 away from the first surface 23, the thickness of the protective piece 50 can be reduced, so as to reduce the material cost of the protective piece 50, and facilitate the control of the manufacturing cost of the battery device 100; in other embodiments, by setting the first surface 23 to protrude from the second surface 24, the assembly difficulty of the first box 10 and the second box 20 can be effectively reduced, and the manufacturing efficiency of the battery device 100 is improved.

[0205] According to some embodiments of the present application, the hardness of the protective piece 50 is greater than the hardness of the second box 20.

[0206] The hardness can refer to the ability of a material to resist the indentation of a hard object into its surface.

[0207] In some embodiments, the hardness of the protective piece 50 is greater than the hardness of the second box 20, that is, the protective piece 50 can better resist the force of the battery replacement support 400 during battery replacement.

[0208] In the above scheme, the protective piece 50 is used to contact the battery replacement support 400, and by setting the hardness of the protective piece 50 to be greater than the hardness of the second box 20, the problem that the second box 20 is deformed by being extruded by the force generated by battery replacement as the number of battery replacement increases can be effectively improved, so that the battery device 100 is structurally reliable, and the reliability of the battery device 100 is improved.

[0209] According to some embodiments of the present application, the material of the protective piece 50 includes polyamide and glass fiber.

[0210] The material of the protection member 50 includes polyamide and glass fiber, so that the protection member 50 is easy to manufacture and has high hardness, and the deformation and damage of the protection member 50 during long-term contact and extrusion with the battery replacement support 400 during battery replacement of the battery device 100 are ensured to a certain extent.

[0211] According to some embodiments of the present application, please refer to Figure 2 and Figure 5 The first box body 10 has an avoiding groove 14 extending through the first direction x, the avoiding groove 14 is used for avoiding the vehicle beam of the vehicle 1000, the number of the avoiding grooves 14 is two, the two avoiding grooves 14 are arranged at intervals along the second direction y, the first direction x, the second direction y and the direction z in which the first box body and the second box body overlap each other are perpendicular to each other. The protection member 50 extends along the second direction y and is located on at least one side of the first box body 10 along the first direction x.

[0212] The vehicle beam is a structural member of the vehicle 1000, in some embodiments, the vehicle beam can be a frame structure spanning the front and rear axles of the vehicle 1000 body, commonly known as a girder, which is the base body of the vehicle 1000. The functions of the vehicle beam can include supporting and connecting various assemblies of the vehicle 1000 body, keeping the assemblies in the correct relative position, and bearing various loads inside and outside the vehicle 1000 body.

[0213] In some embodiments, the vehicle beam can include two longitudinal beams 500, which are arranged at intervals relative to each other. Exemplarily, the longitudinal beam 500 extends along the first direction x, and the two longitudinal beams 500 are arranged at intervals relative to each other along the second direction y. Exemplarily, the first direction x can be parallel to the length direction of the longitudinal beam 500, and the second direction y can be parallel to the width direction of the longitudinal beam 500.

[0214] The avoiding groove 14 can be a recessed structure formed in the wall portion of the first box body 10, or a recessed structure formed between two convex portions arranged at intervals in the wall portion of the first box body 10. The convex portion can be a solid convex portion or a hollow convex portion. When the convex portion is a hollow convex portion, the internal space thereof can accommodate a battery monomer or other structures of the battery device 100.

[0215] Please refer to Figure 2 When the vehicle beam includes two longitudinal beams 500, the number of the avoiding grooves 14 is two, and the two avoiding grooves 14 are arranged at intervals to accommodate the corresponding longitudinal beams 500 respectively. Part of the battery device 100 can protrude and be located between the two avoiding grooves 14, and the protruding part of the battery device 100 can include battery monomers or other electrical components or structural members, such as a docking portion. The docking portion can include an electrical connector, a water-cooling connector, etc. Part of the battery device 100 can also protrude outside the two avoiding grooves 14, and the protruding part can include battery monomers or other electrical components or structural members, etc.

[0216] The function of the avoiding groove 14 includes that when the battery device 100 is mounted on the battery replacement support 400 of the vehicle 1000, the vehicle beam on the vehicle 1000 can be avoided so that the vehicle beam is passed through the avoiding groove 14. The battery device 100 can be moved along the groove depth direction (the groove depth direction can be the closing direction of the first box body 10 and the second box body 20) towards the vehicle beam so that the vehicle beam can be located in the avoiding groove 14.

[0217] Please refer to Figure 2 The battery replacement support 400 can include two support structures 401 which are respectively arranged on the outer sides of the two longitudinal beams 500, and the battery device 100 is mounted on the two support structures 401. Among them, along the second direction y, the two support structures are arranged with a plurality of mounting through holes corresponding to the mounting pieces 40 of the battery device 100. The second direction y can be the length direction of the battery device 100, and in the second direction y, the first wall 21 of the second box body 20 is provided with a plurality of mounting holes 25 for the plurality of mounting pieces 40 to pass out so as to be mounted on the mounting through holes of the support structure 401.

[0218] The protection piece 50 is in a strip shape and located on one side or opposite sides of the first box body 10 along the first direction x.

[0219] In the above scheme, by arranging the avoiding groove 14 capable of avoiding the vehicle beam on the first box body 10, the vehicle beam can pass through the first box body 10 along the first direction x, so that the first box body 10 reasonably utilizes the space in the groove depth direction of the avoiding groove 14, and improves the space utilization rate inside the battery device 100. On the one hand, more battery monomers can be accommodated to improve the volumetric energy density of the battery device 100; on the other hand, when the battery device 100 is applied to the vehicle 1000, the battery device 100 and the vehicle beam jointly occupy part of the space, so that the structure of the vehicle 1000 can be compacted to have the advantages of improving the ground clearance or improving the load capacity.

[0220] Some embodiments of the present application also provide a vehicle 1000, which includes the battery replacement support 400 and the battery device 100 described above. The battery device 100 is mounted on the battery replacement support 400 through the mounting piece 40. Among them, the side of the protection piece 50 away from the second box body 20 is in contact with the battery replacement support 400.

[0221] In some embodiments, the vehicle 1000 can include a passenger car or a commercial vehicle, exemplarily, the vehicle 1000 includes a small car, an urban off-road vehicle, an off-road vehicle, a heavy truck, a light truck or a trailer, etc.

[0222] The bottom of the vehicle 1000 is provided with a battery replacement support 400, and the battery device 100 is mounted on the battery replacement support 400 through the mounting piece 40. The protective piece 50 contacts the battery replacement support 400 away from the side of the second box body 20.

[0223] Some embodiments of the present application also provide a battery device 100, please refer to Figures 2-13 , the battery device 100 can be mounted on the battery replacement support 400 through the mounting piece 40, so as to realize the battery replacement function of the vehicle 1000.

[0224] The battery device 100 includes a first box body 10, a second box body 20, a first sealing piece 30, a mounting piece 40, a second sealing piece 60 and a protective piece 50.

[0225] The first box body 10 and the second box body 20 are overlapped with each other to form a space for accommodating battery monomers. The first box body 10 includes a box body 11 and a connecting portion 12 connected to the outer periphery of the box body 11. The connecting portion 12 can be a flange surrounding the outer periphery of the box body 11.

[0226] The second box body 20 includes a side wall and a bottom wall. The side wall away from the bottom wall forms a first surface 23. The connecting portion 12 is connected to the first surface 23, and the first sealing piece 30 is located between the connecting portion 12 and the first surface 23. The side wall includes two second walls 22 arranged opposite to each other along a first direction x, two first walls 21 arranged opposite to each other along a second direction y, the first surface 23 formed on the side of the first wall 21 away from the bottom wall, and the second surface 24 formed on the side of the second wall 22 away from the bottom wall. The side of the first wall 21 away from the bottom wall forms a second surface 24, and the second surface 24 is located at the outer periphery of the first surface 23, i.e. on the side of the first surface 23 away from the space. Please refer to Figure 7 , the first surface 23 and the second surface 24 are flush with each other and are coplanar.

[0227] In some embodiments, the second box body 20 has a mounting hole 25 penetrating the second surface 24. A part of the mounting piece 40 is located in the mounting hole 25, and the other part protrudes from the second surface 24. The mounting piece 40 is used to connect with the battery replacement support 400. Please refer to Figure 7 , the hole wall of the mounting hole 25 is provided with a mounting groove, and the second sealing piece 60 is arranged in the mounting groove. The second sealing piece 60 surrounds the mounting piece 40. Along the direction z in which the first box body and the second box body are overlapped with each other, a part of the projection of the second sealing piece 60 falls on the first surface 23, and the other part falls on the second surface 24.

[0228] The protective member 50 covers the second surface 24 and the side of the connecting portion 12 away from the first surface 23. The protective member 50 has first through holes 51 corresponding to the mounting holes 25, and the mounting member 40 is arranged in the first through holes 51 and mounted on the battery replacement support 400.

[0229] The protective member 50 includes a first protective portion 52 and a second protective portion 53 connected to each other. The second protective portion 53 covers the second surface 24 and is fixed to the second surface 24 by a threaded member. The first protective portion 52 covers the side of the connecting portion 12 away from the first surface 23. In the vehicle 1000, when the battery device 100 is mounted on the battery replacement support 400, the side of the protective member 50 away from the second box 20 is in contact with the battery replacement support 400.

[0230] In the above scheme, by arranging the protective member 50 covering the second surface 24 and the side of the connecting portion 12 away from the first surface 23, the sealing interface between the first box 10 and the second box 20 can be shielded. On the one hand, it can improve the problem that external substances enter the sealing interface between the first box 10 and the second box 20, and with the increase of the number of battery replacement, the external substances continuously act on the first sealing member 30, causing the structure of the first sealing member 30 to be damaged, resulting in sealing failure of the battery device 100. On the other hand, it can improve the problem that the external substances accumulate between the battery replacement support 400 and the battery device 100, causing the first sealing member 30 to be in a long-term over-sealing state, resulting in excessive deformation of the first sealing member 30 and sealing failure. Thus, the structural integrity of the first sealing member 30 can be ensured to a certain extent to effectively seal, thereby effectively improving the reliability of the battery device 100.

[0231] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a first box body comprising a box main body and a connecting portion connected to the outer periphery of the box main body; a second box body, the first box body and the second box body being mutually covered and jointly defining a space for accommodating battery monomers, the second box body having a first surface and a second surface on the side facing the first box body, the first surface being connected to the connecting portion, the second surface being arranged on at least part of the outer periphery of the first surface, the second box body having a mounting hole penetrating through the second surface; a first sealing member arranged at least partially between the connecting portion and the first surface; a mounting member, a part of the mounting member being located in the mounting hole and the other part protruding from the second surface, the mounting member being used for connecting with a battery replacement support; a protective member covering the side of the second surface and the connecting portion away from the first surface.

2. The battery device according to claim 1, wherein the protective member has a first through hole, and the mounting member is arranged in the first through hole.

3. The battery device according to claim 1, wherein in the direction in which the first box body and the second box body are mutually covered, the side of the protective member away from the second box body is a flat surface and is used for contacting the battery replacement support.

4. The battery device according to claim 1, wherein the protective member comprises a first protective portion and a second protective portion connected to each other, the second protective portion covering the second surface, and the first protective portion covering the side of the connecting portion away from the first surface.

5. The battery device according to claim 4, wherein the side of the first protective portion away from the second protective portion is in contact with the box main body.

6. The battery device according to claim 4, wherein in the direction in which the first box body points to the second box body, the second protective portion protrudes from the first protective portion.

7. The battery device according to claim 4, wherein the second protective portion is connected to the second surface through a first connecting member.

8. The battery device according to claim 7, wherein the first connecting member comprises a threaded member, the second protective portion has a counterbore, and a part of the threaded member is arranged in the counterbore.

9. The battery device according to claim 4, wherein the connecting portion is connected to the first surface through a second connecting member, the side of the first protective portion facing the connecting portion has a groove for accommodating a part of the second connecting member.

10. The battery device according to claim 1, wherein the first surface and the second surface are flush with each other.

11. The battery device according to claim 10, wherein the mounting hole has an aperture greater than or equal to 26 mm.

12. The battery device according to claim 10, wherein the battery device further comprises a second sealing member, the second sealing member being arranged around the mounting member, the hole wall of the mounting hole is provided with a mounting groove, and the second sealing member is arranged in the mounting groove. A portion of the projection of the second seal falls on the first surface and another portion falls on the second surface in a direction in which the first case and the second case are overlapped with each other.

13. The battery device according to claim 12, wherein A distance between a side of the portion of the second seal located in the mounting groove facing the first case and the second surface is not less than 5 mm and not more than 10 mm in a direction in which the first case and the second case are overlapped with each other.

14. The battery device according to claim 1, wherein An outer edge of the first seal is recessed toward a direction of the space corresponding to a position of the mounting hole to form a relief portion for avoiding the mounting hole.

15. The battery device according to claim 14, wherein A distance between the relief portion and a center of the mounting hole is greater than or equal to 5 mm and less than or equal to 17 mm in a direction in which the first surface points to the second surface.

16. The battery device according to claim 15, wherein The distance between the relief portion and the center of the mounting hole is greater than or equal to 11 mm and less than or equal to 15 mm.

17. The battery device according to claim 15, wherein The distance between the relief portion and the center of the mounting hole is equal to 12.2 mm.

18. The battery device according to claim 1, wherein The second surface is convex to the first surface in a direction in which the second case points to the first case, or the first surface is convex to the second surface in the direction in which the second case points to the first case.

19. The battery device according to claim 1, wherein A hardness of the guard is greater than a hardness of the second case.

20. The battery device according to claim 1, wherein A material of the guard includes polyamide and glass fiber.

21. The battery device according to claim 1, wherein The first case has relief grooves through in a first direction, the relief grooves are for avoiding a vehicle beam of a vehicle, a number of the relief grooves is two, the two relief grooves are arranged apart in a second direction, the first direction, the second direction and a direction in which the first case and the second case are overlapped with each other are perpendicular to each other; The guard extends in the second direction and is located on at least one side of the first case in the first direction.

22. A vehicle characterized by Comprise: A battery replacement support; The battery device according to any one of claims 1-21 is mounted on the battery replacement support through the mounting hole; A side of the guard facing away from the second case is in contact with the battery replacement support.

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