Battery devices and electrical equipment

Abstract

The present application discloses a battery device and an electrical device, which relates to the field of battery technology, wherein the battery device includes a battery cell, a box, a bottom guard plate and a connection assembly, wherein the battery cell is arranged in the box, and the box includes a bottom plate in a first direction, and the bottom plate has a bearing area corresponding to the battery cell; the bottom guard plate is arranged in the box, and is located on the side of the bottom plate away from the battery cell; the connection assembly is arranged on the side of the bottom plate facing the bottom guard plate, and corresponds to the bearing area in the first direction, and the connection assembly includes a first connection part and a second connection part, and the first connection part and the second connection part are rigidly connected, and are respectively connected to the bottom plate and the bottom guard plate. The technical solution provided by the present application improves the rigidity and mode of the bottom guard plate by adding rigid connection points between the bottom plate and the area with lower mode on the bottom guard plate, and improves the problem of abnormal noise caused by the easy deformation of the bottom guard plate when the battery device is subjected to vibration impact.

Description

Technical Field

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

[0002] In existing new energy vehicles, considering the functional layout of the vehicle body, the power battery pack is usually set at the bottom of the vehicle body. In order to provide protection for the power battery pack, battery manufacturers generally add a bottom guard plate at the bottom of the power battery pack. However, during the driving of the vehicle, the position of the bottom guard plate of the power battery pack usually makes abnormal noises, which will undoubtedly affect the driving experience of people. Utility Model Content

[0003] The main purpose of the present application is to propose a battery device and an electrical device, aiming to improve the problem that the bottom guard plate of the existing power battery pack is prone to making abnormal noises.

[0004] In a first aspect, the battery device proposed in the present application comprises:

[0005] Battery cells;

[0006] A box body, in which the battery cell is arranged, the box body comprises a bottom plate in a first direction, the bottom plate having a bearing area corresponding to the battery cell;

[0007] A bottom guard plate is disposed on the box body and is located on a side of the bottom plate away from the battery cell; and

[0008] A connecting component is arranged on a side of the bottom plate facing the bottom guard plate and corresponds to the bearing area in the first direction. The connecting component includes a first connecting part and a second connecting part. The first connecting part and the second connecting part are rigidly connected and are respectively connected to the bottom plate and the bottom guard plate.

[0009] The technical solution provided by the present application is to set a connecting component between the bottom guard plate and the bottom plate, and the setting position of the connecting component on the bottom plate corresponds to the load-bearing area, and on the bottom guard plate corresponds to the area with lower modality. Through the rigid connection between the first connecting part and the second connecting part in the connecting component, the bottom guard plate can be connected and fixed to the bottom plate in the area with lower modality. This method of adding rigid connection points between the bottom plate and the bottom guard plate improves the overall stiffness and mode of the bottom guard plate, reduces the degree of deformation of the bottom guard plate when the battery device is subjected to vibration impact, alleviates the problem of the bottom guard plate floating up and down and hitting the bottom plate of the box body, and also improves the problem of abnormal noise generated by the bottom guard plate, thereby improving the driving experience of people to a certain extent.

[0010] In some embodiments, the bottom guard plate is provided with a clearance hole corresponding to the bearing area, and the first connecting portion and the second connecting portion are connected to each other through the clearance hole;

[0011] The first connection portion is fixed to the base plate, and the second connection portion is at least partially located on the side of the bottom guard plate facing away from the base plate, and is configured to be movable and adjustable in the first direction relative to the first connection portion to cooperate with the first connection portion to clamp and fix the bottom guard plate.

[0012] Among them, the first connecting part is fixed to the bottom plate, and a clearance hole is provided on the bottom guard plate, so that the second connecting part can be connected to the first connecting part through the clearance hole from the side of the bottom guard plate away from the bottom plate, that is, the first connecting part is connected from the outside of the battery device, which is beneficial to the assembly process; not only that, the second connecting part in this scheme can also cooperate with the first connecting part to clamp and fix the bottom guard plate through its own movable adjustment along the first direction, and has a more precise adjustment and fixing ability.

[0013] In some embodiments, one of the first connection portion and the second connection portion is configured as a connection bolt, and the other is configured as a connection nut;

[0014] The connecting bolt has a bolt head and a bolt rod, the bolt rod is inserted into the clearance hole, the connecting nut is connected to the bolt rod, and cooperates with the bolt head to clamp and fix the bottom guard plate.

[0015] Among them, the connecting bolt and the connecting nut are connected by threaded fitting. No matter which one of them is fixed on the base plate, the other one can be steplessly adjusted in the first direction, which can more accurately clamp and fix the bottom guard plate relative to the base plate. At the same time, the threaded fitting connection also has a self-locking function, which can effectively prevent the connecting bolt and the connecting nut from loosening in the first direction, thereby ensuring the reliability of the connection.

[0016] In some embodiments, an annular sealing portion is provided between the bolt head of the connecting bolt and / or the connecting nut and the bottom guard plate, and the annular sealing portion is provided corresponding to the clearance hole.

[0017] In order to facilitate the connection of the connecting bolts and the connecting nuts through the bottom guard plate, the provision of the clearance holes is inevitable. In the above technical solution, an annular sealing portion is provided at a position corresponding to the clearance hole on the bottom guard plate. Under the cooperative pressing action of the bolt head and the connecting nut, the annular sealing portion can at least seal the opening on one side of the clearance hole, thereby preventing humid gases and dust in the environment from entering between the bottom guard plate and the bottom plate through the clearance hole, thereby improving the overall sealing performance of the battery device.

[0018] In some embodiments, an annular groove is formed on the end surface of the connecting nut facing the bottom guard plate, and the annular sealing portion is accommodated in the annular groove.

[0019] Among them, by opening an annular groove on the end face of the connecting nut facing the bottom guard plate, a accommodating base can be provided for the annular sealing part, so that the annular sealing part can be stably maintained between the connecting nut and the bottom guard plate after being squeezed by the two, thereby ensuring the reliability of the seal.

[0020] In some embodiments, the bolt head of the connecting bolt has a first end and a second end in the first direction, the first end is connected to the bolt rod and abuts against the bottom guard plate, and a peripheral side wall of the second end is formed with an annular protrusion;

[0021] The annular sealing portion is sleeved on the first end of the bolt head and abuts against the annular protrusion.

[0022] Among them, by arranging an annular protrusion at the second end of the bolt head, the annular sealing portion can be sleeved on the first end of the bolt head and be limited and abutted by the annular protrusion. In this way, the annular sealing portion can be stably maintained on the first end of the bolt head and can be kept abutting against the bottom guard plate, thereby also ensuring the reliability of the seal.

[0023] In some embodiments, the bolt head of the connecting bolt is fixed to the base plate.

[0024] Among them, the bolt head of the connecting bolt is selected to be fixed to the bottom plate, and the bottom guard plate can be assisted in positioning by utilizing the cooperation between the bolt rod of the connecting bolt and the clearance hole during the assembly process, which is beneficial to improving the assembly efficiency of the bottom guard plate.

[0025] In some embodiments, the free end of the bolt rod is disposed in the threaded hole of the connecting nut.

[0026] Among them, after the connecting nut and the connecting bolt are assembled, the free end of the bolt rod is located on the side of the bottom guard plate facing away from the bottom plate. After the battery device is installed on the vehicle, the free end of the bolt rod extends out of the bottom of the bottom guard plate and is connected to the free end through the connecting nut, and ensures that the free end is in the threaded hole of the connecting nut, which can reduce the contact between the free end of the bolt rod and the outside and reduce the degree of danger it poses to the external environment.

[0027] In some embodiments, one of the first connection portion and the second connection portion is configured as a male snap-fitting buckle, and the other is configured as a female snap-fitting buckle, and the male snap-fitting buckle and the female snap-fitting buckle are snap-fitted with each other along the first direction and are connected and locked with each other.

[0028] Among them, the first connecting part and the second connecting part are rigidly connected by means of the snap-fitting cooperation of the male buckle and the female buckle, which not only can improve the assembly efficiency of the bottom guard plate through the quick-insert snap-fit ​​method, but also because the male buckle and the female buckle can be directly arranged between the bottom plate and the bottom guard plate, there is no need for an opening on the bottom guard plate, thereby ensuring the sealing performance of the bottom guard plate.

[0029] In some embodiments, the bottom plate is configured as a heat exchange plate, and the bearing area is formed on the heat exchange plate.

[0030] The bottom plate is set as a heat exchange plate, so that the bottom plate not only has the function of carrying the battery cells, but also has the function of heat management of the battery cells.

[0031] In some embodiments, the bearing area includes a flow channel area and a non-flow channel area;

[0032] An accommodating groove is formed on the end surface of the heat exchange plate facing the bottom guard plate, and the accommodating groove is arranged corresponding to the non-flow channel area;

[0033] The first connecting portion or the second connecting portion is disposed in the accommodating groove.

[0034] Among them, since there is no need to form a heat exchange channel inside the non-channel area of ​​the heat exchange plate, a receiving groove can be opened in the non-channel area, and the first connecting part or the second connecting part can be embedded in the receiving groove, thereby reducing the occupation of the internal space of the battery device by the connecting component in the first direction, so that the bottom guard plate can be as close to the bottom plate as possible, which is beneficial to reducing the overall size of the battery device.

[0035] In some embodiments, the heat exchange plate comprises:

[0036] A first plate body is used to receive the battery cell; and

[0037] A second plate body is arranged on a side of the first plate body facing the bottom guard plate, the second plate body is attached to the first plate body in the non-flow channel area, the second plate body is arched toward the bottom guard plate in the flow channel area, and defines a heat exchange flow channel together with the first plate body;

[0038] Wherein, the second plate body is arranged at the non-flow channel area toward the opening of the first plate body, and defines the accommodating groove together with the first plate body.

[0039] Compared with the method of directly milling the receiving groove on the heat exchanger plate, in the present technical solution, the heat exchanger plate is manufactured by bonding the first plate body and the second plate body in the non-flow channel area. Before bonding, holes can be opened in the corresponding positions on the second plate body in advance. After the bonding is completed, the above-mentioned receiving groove can be naturally formed, which makes the control of the depth of the receiving groove more accurate and reliable.

[0040] In some embodiments, a plurality of the connection components are provided in the extension plane of the bottom plate;

[0041] The distance between two adjacent connection components is less than or equal to 200 mm; and / or the distance between the connection component at the periphery and the edge of the bearing area is less than or equal to 200 mm.

[0042] Among them, it is more reasonable to set the distance between two adjacent connecting components within 200mm. On the premise of ensuring that the mode of the bottom guard plate area between the two adjacent connecting components meets the requirements, the production cost can also be controlled by controlling the setting density of the connecting components; it is more reasonable to set the distance between the peripheral connecting components and the edge of the load-bearing area within 200mm, which can prevent the appearance of a large area of ​​suspended area on the bottom guard plate near the edge of the bottom plate, which is beneficial to improving the overall mode of the bottom guard plate.

[0043] In some embodiments, the box body further includes a surrounding frame, the bottom plate is disposed on the surrounding frame at one side in the first direction, and defines a mounting cavity together with the surrounding frame, and the battery cell is disposed in the mounting cavity;

[0044] The bottom plate and / or the bottom guard plate are connected to the surrounding frame via a threaded connection structure.

[0045] Among them, the bottom plate, bottom guard plate and frame are firmly connected together through a threaded connection structure, which can significantly improve the rigidity and deformation resistance of the entire box. At the same time, compared with welding and other permanent connection methods, the threaded connection method can reduce the use of reinforcement structure, thereby reducing the total mass of the battery device, and the threaded connection method is convenient for disassembly and maintenance.

[0046] In some embodiments, a reinforcement area is formed on the bottom guard plate, and the reinforcement area is recessed toward the bottom plate compared to its surrounding area;

[0047] The connecting component is arranged in the reinforcement area.

[0048] Among them, processing a reinforcement area on the bottom guard plate can significantly improve the strength and rigidity of the bottom guard plate. At the same time, since the reinforcement area is recessed toward the bottom plate, the size of the connecting component in the first direction is reduced, which is beneficial to improving the overall structural stability of the bottom guard plate, the connecting component and the bottom plate.

[0049] In a second aspect, the present application further proposes an electrical device, which includes the above-mentioned battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0051] Figure 1 A simplified structural diagram of an embodiment in which the electric device provided in this application is a vehicle;

[0052] Figure 2 A schematic diagram of an exploded structure of a battery device according to an embodiment of the present application;

[0053] Figure 3 A schematic diagram of the exploded structure of the box in the battery device provided in this application;

[0054] Figure 4 A bottom view of the structure of the box in the battery device provided in this application;

[0055] Figure 5 for Figure 4 Structural diagram of the middle section AA;

[0056] Figure 6 for Figure 3 A schematic diagram of the three-dimensional structure of the mid-bottom plate (specifically, the heat exchange plate);

[0057] Figure 7 for Figure 6 A schematic diagram of the enlarged structure of the local B in the middle;

[0058] Figure 8 for Figure 7 A structural schematic diagram of the connecting nut from another perspective;

[0059] Fig. 9 This is a schematic structural diagram of another embodiment of a connecting component in a battery device provided in the present application.

[0060] Description of Figure Numbers:

[0061] 1000. Vehicles;

[0062] 100, battery device; 200, controller; 300, motor;

[0063] 1. Box body; 1a. Installation cavity; 11. Bottom plate; 11a. Heat exchange plate; 111a. Load-bearing area; 1111a. Flow channel area; 1112a. Non-flow channel area; 111b. Connection area; 111c. Accommodation groove; 111d. Heat exchange flow channel; 111. First plate body; 112. Second plate body; 12. Frame; 13. Top cover; 2. Battery cell; 3. Bottom guard plate; 3a. Reinforcement area; 3b. Clearance hole ; 4. Connecting assembly; 41. First connecting part; 41a. Connecting bolt; 411. Bolt head; 4111. First end; 4112. Second end; 4112a. Annular protrusion; 412. Bolt rod; 41b. Snap-fit ​​male buckle; 42. Second connecting part; 42a. Connecting nut; 421a. Annular groove; 422a. Threaded hole; 42b. Snap-fit ​​female buckle; 43. Annular sealing part; X. First direction.

[0064] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0065] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0067] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0068] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0069] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0070] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0071] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0072] The battery device disclosed in the embodiment of the present application can be used to provide electric energy for electric devices, wherein the electric devices can be but are not limited to battery vehicles, electric vehicles, ships, spacecraft, etc. Among them, the spacecraft can include airplanes, rockets, space shuttles, spacecraft, etc.

[0073] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0074] Please refer to Figure 1 , Figure 1 The electrical equipment provided for this application is a simplified structural diagram of an embodiment of a vehicle. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and driving of the vehicle 1000. Working power requirements.

[0075] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0076] In existing new energy vehicles, considering the functional layout of the vehicle body, the power battery pack is usually set at the bottom of the vehicle body. During driving, the vehicle will inevitably encounter gravel sections and bumpy sections. In gravel sections, the gravel crushed by the wheels is easy to splash around at the bottom of the vehicle body, which may hit the power battery pack, causing the battery pack to deform and be damaged. In bumpy sections, the power battery pack at the bottom of the vehicle body may directly hit the road surface, causing damage to the power battery pack. In order to provide protection for the power battery pack, current battery manufacturers usually add a bottom guard plate at the bottom of the power battery pack. However, during the driving of the vehicle, the position where the bottom guard plate of the power battery pack is located usually emits abnormal noise, which to a certain extent affects the driving experience of people.

[0077] From the analysis of the causes of the above problems, it can be known that the current power battery pack generally includes a box frame and a box bottom plate. The box bottom plate is arranged at the bottom of the box frame to enclose the box frame to form an installation cavity, and the battery cell is arranged in the installation cavity. Among them, the connection position of the bottom guard plate and the box is usually affected by the box frame. In the power battery pack composed of large modules, the box frame usually only includes a surrounding frame. The bottom guard plate is connected to the surrounding frame by bolts at its periphery. The area with a larger area in the middle is basically in a suspended state relative to the box bottom plate. At the same time, in order to take into account the lightweight performance, the thickness of the bottom guard plate is also limited. Therefore, the stiffness and mode of the bottom guard plate are difficult to reach the ideal level. This causes the middle area of ​​the bottom guard plate to float up and down with the vibration of the power battery pack during the driving of the vehicle. This is also the main reason for the abnormality. Based on this, it is possible to consider adding rigid connection points between the suspended area of ​​the bottom guard plate and the bottom plate of the box, thereby improving the stiffness and mode of the bottom guard plate. At the same time, it is worth noting that the suspended area of ​​the bottom guard plate usually corresponds to the installation area of ​​the battery cell on the bottom plate of the box, and the impact of the setting of rigid connection points on the battery cell should be reduced.

[0078] In view of this, the present application provides a battery device. Applying the battery device provided by the present application to a vehicle can at least improve the problem that the bottom guard plate of the existing power battery pack is prone to emitting abnormal noise.

[0079] To facilitate understanding of the battery device provided by the present application, the following is a description with reference to the accompanying drawings, wherein: Figure 2 A schematic diagram of an exploded structure of a battery device according to an embodiment of the present application; Figure 3A schematic diagram of the exploded structure of the box in the battery device provided in this application; Figure 4 A bottom view of the structure of the box in the battery device provided in this application; Figure 5 for Figure 4 Structural diagram of the middle section AA; Figure 6 for Figure 3 A schematic diagram of the three-dimensional structure of the mid-bottom plate (specifically, the heat exchange plate); Figure 7 for Figure 6 A schematic diagram of the enlarged structure of the local B in the middle; Figure 8 for Figure 7 A structural schematic diagram of the connecting nut from another perspective; Fig. 9 This is a schematic structural diagram of another embodiment of a connecting component in a battery device provided in the present application.

[0080] See also Figures 3 to 5 In one embodiment of the present application, the battery device 100 includes a battery cell 2, a box body 1, a bottom guard plate 3 and a connecting component 4. The battery cell 2 is arranged in the box body 1. The box body 1 includes a bottom plate 11 located in a first direction X, and the bottom plate 11 has a bearing area 111a corresponding to the battery cell 2; the bottom guard plate 3 is arranged on the box body 1, and is located on the side of the bottom plate 11 away from the battery cell 2; the connecting component 4 is arranged on the side of the bottom plate 11 facing the bottom guard plate 3, and corresponds to the bearing area 111a in the first direction X, and the connecting component 4 includes a first connecting portion 41 and a second connecting portion 42, the first connecting portion 41 and the second connecting portion 42 are rigidly connected, and are respectively connected to the bottom plate 11 and the bottom guard plate 3.

[0081] It should be noted that the first direction X mentioned in the embodiment of the present application generally refers to the height direction of the battery device 100. Since the battery device 100 is generally installed at the bottom of the vehicle, the first direction X generally also refers to the height direction of the vehicle on which the battery device 100 is installed. The battery device 100 generally loads the battery cells 2 through the box 1 and is mounted on the vehicle. As a whole, please refer to Figure 2The box body 1 generally includes a bottom plate 11, a surrounding frame 12 and a top cover 13. The bottom plate 11 and the top cover 13 are respectively arranged on both sides of the surrounding frame 12, thereby defining an installation cavity 1a together with the surrounding frame 12, and the battery cell 2 is also arranged in the installation cavity 1a. The bottom plate 11 generally includes a connecting area 111b and a bearing area 111a. The connecting area 111b is generally arranged around the bearing area 111a. The bottom plate 11 is connected to the surrounding frame 12 through its connecting area 111b, and carries the battery cell 2 in the installation cavity 1a through its bearing area 111a. Based on this, "the bottom plate 11 has a bearing area 111a corresponding to the battery cell 2" should be understood as that the battery cell 2 and the bearing area The projection of domain 111a in the first direction overlaps; in some box structures, cross beams and longitudinal beams can also be set in the installation cavity 1a, and the cross beams and longitudinal beams are cross-arranged and connected to the frame 12, so as to divide the installation cavity 1a into multiple small cavities, and a battery cell 2 can be set in each small cavity. Generally speaking, the bottom plate 11 can also be connected to the cross beams and longitudinal beams to increase the rigidity of the box 1. Corresponding to this box structure, the connection area 111b of the bottom plate 11 includes an area corresponding to the frame 12 in the first direction X, and an area corresponding to the cross beam and the longitudinal beam in the first direction X. The bearing area 111a of the bottom plate 11 is also divided into multiple areas by the cross beams and the longitudinal beams.

[0082] The number of battery cells 2 in the box body 1 can be one or more, wherein the multiple battery cells 2 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 2 are both connected in series and in parallel. The multiple battery cells 2 can be directly connected in series, in parallel, or in mixed connection to form a battery pack. Of course, the multiple battery cells 2 can also be in the form of battery modules first connected in series, in parallel, or in mixed connection, and the multiple battery modules are then connected in series, in parallel, or in mixed connection to form a battery pack. The battery device 100 may also include other structures. For example, the battery device 100 may also include a confluence component for realizing electrical connection between multiple battery cells 2 or multiple battery modules. Each battery cell 2 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 2 may be cylindrical, flat, rectangular, or in other shapes.

[0083] The "bottom guard plate 3" is usually used as a protective component of the box body 1 in the battery device 100 and is arranged at the bottom of the box body 1, that is, on the side of the bottom plate 11 of the box body 1 away from the battery cell 2. Generally speaking, the bottom guard plate 3 is connected to the frame 12 of the box body 1 through its periphery, so as to shield the bottom plate 11 in the first direction X. For the box structure in which the frame 12 is also provided with a cross beam and a longitudinal beam, the bottom guard plate 3 can also pass through the bottom plate 11 to connect to the cross beam and the longitudinal beam; regarding the structural type of the bottom guard plate 3, considering the lightweight and protective performance, the bottom guard plate 3 can be made of aluminum alloy, and a concave-convex structure is processed on the bottom guard plate 3 by stamping, and the rigidity and mode of the bottom guard plate 3 are improved by the concave-convex structure. The specific structural type of the bottom guard plate 3 is not limited in this embodiment.

[0084] “The connection component 4 corresponds to the bearing area 111a in the first direction X” means that the point of action of the connection component 4 on the bottom plate 11 is within the bearing area 111a of the bottom plate 11, that is, the projection of the connection component 4 and the bearing area 111a in the first direction X coincide; “the connection component 4” includes a first connection portion 41 and a second connection portion 42 that are rigidly connected to each other, wherein “rigid connection” means that there is a fixed connection between the first connection portion 41 and the second connection portion 42, and there is no relative displacement between the two after the connection and fixation, and it is difficult to directly separate the two from the first direction X, and forced separation may result in structural damage. Common rigid connection methods include welding, riveting and screwing. This embodiment does not limit the specific rigid connection method between the first connection portion 41 and the second connection portion 42; “the first connection portion 41 and the second connection portion 42 are respectively connected to the bottom plate 11 and the bottom guard The “plate 3” can be understood as the first connection part 41 is arranged on the bottom plate 11, and the second connection part 42 is arranged on the bottom guard plate 3. It can also be understood as the first connection part 41 is arranged on the bottom guard plate 3, and the second connection part 42 is arranged on the bottom plate 11. Due to the rigid connection between the first connection part 41 and the second connection part 42, the bottom plate 11 and the bottom guard plate 3 are connected and fixed in the first direction X, and there is no relative displacement between the bottom plate 11 and the bottom guard plate 3. “The first connection part 41 and the second connection part 42 are respectively connected to the bottom plate 11 and the bottom guard plate 3” should not be limitedly understood as “the first connection part 41 and the second connection part 42 are respectively fixedly connected to the bottom plate 11 and the bottom guard plate 3”. It may also be “one of the first connection part 41 and the second connection part 42 is fixedly connected to the bottom plate 11, and then cooperates with the other one to clamp and fix the bottom guard plate 3”, thereby indirectly connecting and fixing the bottom plate 11 and the bottom guard plate 3.

[0085] The technical solution provided in the present application is to set a connecting component 4 between the bottom guard plate 3 and the bottom plate 11, and the setting position of the connecting component 4 corresponds to the load-bearing area 111a on the bottom plate 11, and corresponds to the area with lower modality on the bottom guard plate 3. Through the rigid connection between the first connecting part 41 and the second connecting part 42 in the connecting component 4, the bottom guard plate 3 can be connected and fixed to the bottom plate 11 at the area with lower modality. This method of adding a rigid connection point between the bottom plate 11 and the bottom guard plate 3 improves the overall stiffness and mode of the bottom guard plate 3, reduces the degree of deformation of the bottom guard plate 3 when the battery device 100 is subjected to vibration impact, alleviates the problem of the bottom guard plate 3 floating up and down and hitting the bottom plate 11 of the box body 1, that is, improves the problem of abnormal noise generated by the bottom guard plate 3, and improves the driving experience of people to a certain extent.

[0086] See also Figure 4 and Figure 5 In some embodiments, a clearance hole 3b is provided in the corresponding bearing area 111a of the bottom guard plate 3, and the first connection portion 41 and the second connection portion 42 are connected to each other through the clearance hole 3b; the first connection portion 41 is fixed to the bottom plate 11, and the second connection portion 42 is at least partially located on the side of the bottom guard plate 3 away from the bottom plate 11, and is configured to be able to be movably adjusted in the first direction X relative to the first connection portion 41, so as to cooperate with the first connection portion 41 to clamp and fix the bottom guard plate 3.

[0087] It should be noted that “the bottom guard plate 3 is provided with a clearance hole 3b corresponding to the bearing area 111a” means that the bottom guard plate 3 is provided with a clearance hole 3b at a position corresponding to the bearing area 111a of the bottom plate 11 in the first direction X; “the first connecting portion 41 and the second connecting portion 42 are connected to each other through the clearance hole 3b” includes three schemes, the first scheme is that the first connecting portion 41 passes through the clearance hole 3b to connect to the second connecting portion 42, and the second scheme is that the second connecting portion 42 passes through the clearance hole 3b to connect to the first The third type is that the first connection part 41 is connected to the second connection part 42 in the clearance hole 3b. Based on this, "the second connection part 42 is at least partially located on the side of the bottom guard plate 3 away from the bottom plate 11", because the second connection part 42 may be completely located on the side of the bottom guard plate 3 away from the bottom plate 11. At this time, the first connection part 41 needs to pass through the clearance hole 3b to connect with the second connection part 42. The second connection part 42 may also have a portion extending into the clearance hole 3b to connect with the first connection part 41 through this portion.

[0088] There are many ways to fix the first connection part 41 to the bottom plate 11, for example, by welding or by structural adhesive, which is not limited in the embodiment of the present application; it is worth mentioning that the part of the second connection part 42 on the side of the bottom guard plate 3 away from the bottom plate 11 also has the function of pressing the bottom guard plate 3, so this part overlaps with the solid part of the bottom guard plate 3 in the first direction X; the second connection part 42 is configured to be able to be movably adjusted in the first direction X relative to the first connection part 41. There are many structural forms that allow the second connection part 42 to be movably adjusted in the first direction X. For example, the first connection part 41 is a plurality of grooves distributed in the socket extending along the first direction X, and the second connection part 42 is a protrusion on the side wall of the insertion rod. The insertion rod is inserted into the socket along the first direction X. The protrusion is selected to be connected with the corresponding groove by interference fit, which can adjust the position of the second connection part 42. The specific structural forms of the first connection part 41 and the second connection part 42 are not limited in the present embodiment.

[0089] According to the above technical scheme, the first connecting part 41 is fixed to the bottom plate 11, and a clearance hole 3b is provided on the bottom guard plate 3, so that the second connecting part 42 can be connected to the first connecting part 41 through the clearance hole 3b from the side of the bottom guard plate 3 away from the bottom plate 11, that is, the first connecting part 41 is connected from the outside of the battery device 100, which is beneficial to the assembly process; not only that, the second connecting part 42 in this scheme can also cooperate with the first connecting part 41 to clamp and fix the bottom guard plate 3 through its own movable adjustment along the first direction X, and has a more precise adjustment and fixing capability.

[0090] See also Figures 5 to 7 In some embodiments, one of the first connecting part 41 and the second connecting part 42 is configured as a connecting bolt 41a, and the other is configured as a connecting nut 42a; the connecting bolt 41a has a bolt head 411 and a bolt rod 412, the bolt rod 412 is passed through the clearance hole 3b, the connecting nut 42a is connected to the bolt rod 412, and cooperates with the bolt head 411 to clamp and fix the bottom guard plate 3.

[0091] It should be noted that "one of the first connecting part 41 and the second connecting part 42 is set as a connecting bolt 41a, and the other is set as a connecting nut 42a" includes two schemes, namely "the first connecting part 41 is set as a connecting bolt 41a, and the second connecting part 42 is set as a connecting nut 42a", and "the second connecting part 42 is set as a connecting bolt 41a, and the first connecting part 41 is set as a connecting nut 42a", wherein the connecting nut 42a refers to a threaded connection structure with a threaded hole 422a, and the connecting nut 42a should not be narrowly understood as a standard nut, and it may also include some other structures. Similarly, the connecting bolt 41a refers to a threaded connection structure with a bolt rod 412 and a bolt head 411, and the connecting bolt 41a should not be narrowly understood as a standard bolt, and it may also include some other structures. This embodiment does not limit this, but the connecting nut 42a can at least use its own radially extending part to cooperate with the bolt head 411 to clamp and fix the bottom guard plate 3. It is worth mentioning that in this solution, it is not limited which one of the connecting bolt 41a and the connecting nut 42a is fixed to the base plate 11 as the first connecting part 41. Both the connecting bolt 41a and the connecting nut 42a may be fixed to the base plate 11, and this embodiment does not limit this.

[0092] According to the above technical solution, the connecting bolt 41a and the connecting nut 42a are connected by threaded fitting. No matter which one of them is fixed to the base plate 11, the other one can be steplessly adjusted in the first direction X, so that the bottom guard plate 3 can be clamped and fixed relative to the base plate 11 more accurately. At the same time, the threaded fitting connection also has a self-locking function, which can effectively prevent the connecting bolt 41a and the connecting nut 42a from loosening in the first direction X, thereby ensuring the reliability of the connection.

[0093] See also Figure 5 and Figure 8 In some embodiments, an annular sealing portion 43 is provided between the bolt head 411 of the connecting bolt 41a and / or the connecting nut 42a and the bottom guard plate 3, and the annular sealing portion 43 is provided corresponding to the clearance hole 3b.

[0094] It should be noted that the “annular sealing portion 43” refers to a component with a sealing function, which may specifically be a sealant or a sealing gasket; “an annular sealing portion 43 is provided between the bolt head 411 of the connecting bolt 41a and / or the connecting nut 42a and the bottom guard plate 3” includes two solutions, namely, “an annular sealing portion 43 is provided between the connection interface between the bolt head 411 of the connecting bolt 41a and the bottom guard plate 3”, “an annular sealing portion 43 is provided between the connection interface between the connecting nut 42a and the bottom guard plate 3” and “an annular sealing portion 43 is provided between the connection interface between the connecting bolt 41a and the bottom guard plate 3”. An annular sealing portion 43 is provided between the connection interface between the bolt head 411 of the connecting bolt 41a and the bottom guard plate 3, and an annular sealing portion 43 is also provided between the connection interface between the connecting nut 42a and the bottom guard plate 3". Obviously, when the annular sealing portions 43 are provided between the bolt head 411 of the connecting bolt 41a and the connecting nut 42a and the bottom guard plate 3 at the same time, the overall sealing effect of the battery device 100 is better; "the annular sealing portion 43 is provided corresponding to the clearance hole 3b" means that, in the projection in the first direction X, the annular sealing portion 43 is provided around the clearance hole 3b.

[0095] In order to facilitate the connection between the connecting bolt 41a and the connecting nut 42a through the bottom guard plate 3, the setting of the clearance hole 3b is inevitable. In the above technical scheme, an annular sealing portion 43 is provided at a position corresponding to the clearance hole 3b on the bottom guard plate 3. Under the cooperative pressing action of the bolt head 411 and the connecting nut 42a, the annular sealing portion 43 can at least seal the opening on one side of the clearance hole 3b, thereby preventing humid gases and dust in the environment from entering between the bottom guard plate 3 and the bottom plate 11 through the clearance hole 3b, thereby improving the overall sealing performance of the battery device 100.

[0096] See also Figure 8 In some embodiments, an annular groove 421 a is formed on the end surface of the connecting nut 42 a facing the bottom guard plate 3 , and the annular sealing portion 43 is accommodated in the annular groove 421 a .

[0097] It should be noted that since the function of the annular groove 421a is to accommodate the annular sealing portion 43, it can be determined on the basis of the annular sealing portion 43 that after the connecting nut 42a is connected to the connecting bolt 41a and abuts against the bottom guard plate 3, in the projection of the first direction X, the annular groove 421a on the connecting nut 42a is arranged around the clearance hole 3b on the bottom guard plate 3, and for the connecting nut 42a itself, the annular groove 421a is arranged around its threaded hole 422a.

[0098] According to the above technical solution, by opening an annular groove 421a on the end face of the connecting nut 42a facing the bottom guard plate 3, a accommodating base can be provided for the annular sealing portion 43, so that the annular sealing portion 43 can be stably maintained between the connecting nut 42a and the bottom guard plate 3 after being squeezed by the two, thereby ensuring the reliability of the seal.

[0099] See also Figure 5 In some embodiments, the bolt head 411 of the connecting bolt 41a has a first end 4111 and a second end 4112 located in the first direction X, the first end 4111 is connected to the bolt rod 412 and abuts against the bottom guard plate 3, and the peripheral side wall of the second end 4112 is formed with an annular protrusion 4112a; the annular sealing portion 43 is sleeved on the first end 4111 of the bolt head 411 and abuts against the annular protrusion 4112a.

[0100] It should be noted that the connecting bolt 41a is arranged along the first direction X, and its bolt rod 412 and bolt head 411 are arranged in sections in the first direction X. In this scheme, the bolt head 411 also has a first end 4111 and a second end 4112 in the first direction X. The first end 4111 is connected to the bolt rod 412. Therefore, after the bolt rod 412 is connected to the connecting nut 42a, the first end 4111 of the bolt head 411 can abut against the bottom guard plate 3, and the second end 4112 also serves as an end of the connecting bolt 41a away from the bottom guard plate 3. The peripheral side wall of the second end 4112 is formed with an annular protrusion 4112a. Therefore, the cross-sectional diameter of the second end 4112 of the connecting bolt 41a is undoubtedly larger than the cross-sectional diameter of the first end 4111, which enables the annular sealing portion 43 to abut against the annular protrusion 4112a after being sleeved on the first end 4111 of the connecting bolt 41a.

[0101] According to the above technical solution, by providing an annular protrusion 4112a on the second end 4112 of the bolt head 411, the annular sealing portion 43 can be sleeved on the first end 4111 of the bolt head 411 and is limited by the annular protrusion 4112a. In this way, the annular sealing portion 43 can be stably maintained on the first end 4111 of the bolt head 411 and can be maintained in abutment with the bottom guard plate 3, thereby also ensuring the reliability of the seal.

[0102] See also Figure 5 and Figure 7 In some embodiments, the bolt head 411 of the connecting bolt 41 a is fixed to the base plate 11 .

[0103] This solution stipulates that the bolt head 411 of the connecting bolt 41a is fixed to the base plate 11, so it can be determined that the bolt rod 412 of the connecting bolt 41a is arranged along the first direction X through the clearance hole 3b of the bottom guard plate 3 so as to be connected to the connecting nut 42a on the other side of the bottom guard plate 3.

[0104] According to the above technical solution, the bolt head 411 of the connecting bolt 41a is selected to be fixed to the base plate 11. During the assembly process, the bolt rod 412 of the connecting bolt 41a can be used in conjunction with the clearance hole 3b to assist in positioning the base plate 3, which is beneficial to improving the assembly efficiency of the base plate 3.

[0105] See also Figure 5 In some embodiments, the free end of the bolt rod 412 is disposed in the threaded hole 422a of the connecting nut 42a.

[0106] It should be noted that the bolt rod 412 is usually connected to the bolt head 411 at one end, and the "free end of the bolt rod 412" refers to the end opposite to the bolt head 411, and the connecting bolt 41a passes through the free end through the makeshift hole 3b of the bottom guard plate 3 and is connected to the threaded hole 422a of the connecting nut 42a; "the free end of the bolt rod 412 is arranged in the threaded hole 422a of the connecting nut 42a" can be understood as, after the connection between the connecting nut 42a and the connecting bolt 41a is completed, the free end of the bolt rod 412 does not pass through the threaded hole 422a of the connecting nut 42a, and it can also be understood that the depth of the threaded hole 422a is greater than the length of the free end of the bolt rod 412, and the threaded hole 422a of the connecting nut 42a can specifically be a blind hole.

[0107] According to the above technical solution, after the connecting nut 42a and the connecting bolt 41a are assembled, the free end of the bolt rod 412 is located on the side of the bottom guard plate 3 away from the bottom plate 11. After the battery device 100 is installed on the vehicle, the free end of the bolt rod 412 extends out of the bottom of the bottom guard plate 3 and is connected to the free end through the connecting nut 42a. The free end is ensured to be in the threaded hole 422a of the connecting nut 42a, thereby reducing the contact between the free end of the bolt rod 412 and the outside and reducing the degree of danger to the external environment.

[0108] See also Fig. 9 In some embodiments, one of the first connection portion 41 and the second connection portion 42 is configured as a male snap-fit ​​buckle 41b, and the other is configured as a female snap-fit ​​buckle 42b. The male snap-fit ​​buckle 41b and the female snap-fit ​​buckle 42b are snap-fitted with each other along the first direction X and are connected and locked with each other.

[0109] It should be noted that, in this embodiment, the first connecting portion 41 may be configured as a snap-fit ​​male buckle 41b, and the second connecting portion 42 may be configured as a snap-fit ​​female buckle 42b, or the first connecting portion 41 may be configured as a snap-fit ​​female buckle 42b, and the second connecting portion 42 may be configured as a snap-fit ​​male buckle 41b, that is, this embodiment does not limit the specific distribution positions of the snap-fit ​​male buckle 41b and the snap-fit ​​female buckle 42b on the bottom plate 11 and the bottom guard plate 3, but it can be determined that the snap-fit ​​male buckle 41b and the snap-fit ​​female buckle 42b are arranged between the bottom plate 11 and the bottom guard plate 3, and are respectively arranged on the bottom plate 11 or the bottom guard plate 3 by a fixed connection method, and the fixed connection method may be structural adhesive bonding or welding.

[0110] This embodiment only limits the connection and locking between the first connecting portion 41 and the second connecting portion 42 by means of the snap-fitting cooperation between the snap-fitting male buckle 41b and the snap-fitting female buckle 42b, and does not limit the specific structural type of the snap-fitting male buckle 41b and the snap-fitting female buckle 42b. However, it is worth noting that after the snap-fitting male buckle 41b and the snap-fitting female buckle 42b are snap-fitted with each other along the first direction X, it is difficult to directly disassemble them along the first direction X, and forced disassembly may cause structural damage. Of course, there may also be an unlocking structure between the snap-fitting male buckle 41b and the snap-fitting female buckle 42b. By first unlocking the two through the unlocking structure, the two may also be disassembled. Specifically, Fig. 9 In the figure, the male engaging buckle 41b has an elastic claw extending along the first direction X, and the female engaging buckle 42b has a slot for the elastic claw to extend into. The elastic claw will return to the open state after shrinking and extending into the slot, thereby abutting against the limiting structure inside it, so as to achieve the purpose of limiting the separation of the male engaging buckle 41b and the female engaging buckle 42b from each other along the first direction X.

[0111] According to the above technical solution, the first connecting part 41 and the second connecting part 42 are rigidly connected by means of the snap-fitting cooperation between the male snap-fit ​​buckle 41b and the female snap-fit ​​buckle 42b. Not only can the assembly efficiency of the bottom guard plate 3 be improved by the quick-insert snap-fitting method, but also because the male snap-fit ​​buckle 41b and the female snap-fit ​​buckle 42b can be directly arranged between the bottom plate 11 and the bottom guard plate 3, there is no need to open the bottom guard plate 3, thereby ensuring the sealing performance of the bottom guard plate 3.

[0112] See also Figures 5 to 7 In some embodiments, the bottom plate 11 is configured as a heat exchange plate 11 a, and the bearing area 111 a is formed on the heat exchange plate 11 a.

[0113] It should be noted that a heat exchange channel 111d extending along a certain path is usually formed inside the heat exchange plate 11a. By continuously injecting heat exchange medium into the heat exchange channel 111d, the heat exchange plate 11a and the battery cell 2 can achieve heat exchange, thereby achieving the purpose of thermal management of the battery cell 2. In the field of battery technology, the structural types of the heat exchange plate 11a can be roughly divided into profile heat exchange plates 11a and brazed heat exchange plates 11a, which are not limited in this embodiment.

[0114] According to the above technical solution, the bottom plate 11 is configured as a heat exchange plate 11 a , so that the bottom plate 11 not only has the function of supporting the battery cells 2 , but also has the function of heat management for the battery cells 2 .

[0115] Please continue reading Figure 5 and Figure 7In some embodiments, the bearing area 111a includes a flow channel area 1111a and a non-flow channel area 1112a; a receiving groove 111c is formed on the end surface of the heat exchange plate 11a facing the bottom guard plate 3, and the receiving groove 111c is arranged corresponding to the non-flow channel area 1112a; the first connecting part 41 or the second connecting part 42 is arranged in the receiving groove 111c.

[0116] It should be noted that, since the bottom plate 11 is configured as a heat exchange plate 11a, the bearing area 111a of the bottom plate 11 is actually the bearing area 111a of the heat exchange plate 11a, and the heat exchange plate 11a contacts the battery cell 2 through the bearing area 111a, thereby performing thermal management on the battery cell 2. In this embodiment, the bearing area 111a is divided into a flow channel area 1111a and a non-flow channel area 1112a, wherein the "flow channel area 1111a" refers to a region in which a heat exchange flow channel 111d is formed, and the "non-flow channel area 1112a" is a region adjacent to the flow channel area 1111a, that is, a region in which there is no heat exchange flow channel 111d; since the above embodiment does not limit the specific distribution positions of the first connection portion 41 and the second connection portion 42 on the bottom plate 11 and the bottom guard plate 3, in this embodiment, the first connection portion 41 may be arranged in the accommodating groove 111c, or the second connection portion 42 may be arranged in the accommodating groove 111c.

[0117] According to the above technical solution, since the heat exchange channel 111d does not need to be formed inside the non-channel area 1112a of the heat exchange plate 11a, an accommodating groove 111c can be opened in the non-channel area 1112a, and the first connecting part 41 or the second connecting part 42 can be embedded in the accommodating groove 111c, thereby reducing the occupation of the internal space of the battery device 100 by the connecting component 4 in the first direction X, so that the bottom guard plate 3 can be as close to the bottom plate 11 as possible, which is beneficial to reducing the overall size of the battery device 100.

[0118] Please continue reading Figure 5 and Figure 7 In some embodiments, the heat exchange plate 11a includes a first plate body 111 and a second plate body 112, the first plate body 111 is arranged to support the battery cell 2; the second plate body 112 is arranged on the side of the first plate body 111 facing the bottom guard plate 3, the second plate body 112 is attached to the first plate body 111 in the non-flow channel area 1112a, the second plate body 112 is arched toward the bottom guard plate 3 in the flow channel area 1111a, and together with the first plate body 111, a heat exchange flow channel 111d is defined; wherein the second plate body 112 is opened toward the first plate body 111 in the non-flow channel area 1112a, and together with the first plate body 111, a receiving groove 111c is defined.

[0119] It should be noted that the heat exchange plate 11a of the present solution is connected by the first plate body 111 and the second plate body 112 in the non-flow channel area 1112a, and the shape structure of the second plate body 112 and the first plate body 111 define a heat exchange channel 111d together. Such a heat exchange plate 11a is usually formed by brazing (a brazing material is provided between the second plate body 112 and the first plate body 111 in the non-flow channel area 1112a. Since the melting point of the brazing material is lower than that of the second plate body 112 and the first plate body 111, the brazing material is melted by heating to a corresponding temperature, thereby connecting the second plate body 112 and the first plate body 111). However, the formation of "coating a sealing structural adhesive at the non-flow channel area 1112a between the second plate body 112 and the first plate body 111 for bonding" should not be excluded. Type; "the second plate body 112 is arched toward the bottom guard plate 3 at the flow channel area 1111a", wherein "arched" means that the second plate body 112 is recessed toward the bottom guard plate 3 at the flow channel area 1111a compared to the non-flow channel area 1112a, thereby forming a cavity between the second plate body 112 and the first plate body 111, and the cavity is the heat exchange flow channel 111d, wherein the arched portion of the second plate body 112 can be formed by stamping; the second plate body 112 is opened toward the first plate body 111 at the non-flow channel area 1112a, and since the second plate body 112 is also attached to the first plate body 111 at the non-flow channel area 1112a, therefore, under the structure of the first plate body 111, the second plate body 112 and the first plate body 111 are surrounded by the above-mentioned receiving groove 111c.

[0120] Compared with the method of directly milling the receiving groove 111c on the heat exchange plate 11a, in the present technical solution, the heat exchange plate 11a is manufactured by bonding the first plate body 111 and the second plate body 112 in the non-flow channel area 1112a. Before bonding, a through hole can be opened in the corresponding position on the second plate body 112 in advance. After the bonding is completed, the above-mentioned receiving groove 111c can be naturally formed, and the control of the depth of the receiving groove 111c is more accurate and reliable.

[0121] See also Figure 4 and Figure 6 In some embodiments, a plurality of connection components 4 are provided in the extension plane of the bottom plate 11; and the distance between two adjacent connection components 4 is less than or equal to 200 mm.

[0122] It should be noted that, since the bottom plate 11 is located on one side of the box body 1 in the first direction X, the "extended plane of the bottom plate 11" refers to a plane perpendicular to the first direction X. In this plane, multiple connecting components 4 are arranged. The present embodiment does not limit the specific number and distribution state of the connecting components 4. The multiple connecting components 4 can be distributed in a rectangular array or a circular array, or can be distributed irregularly, as long as the spacing between two adjacent connecting components 4 is less than or equal to 200 mm. Among them, the "spacing between two adjacent connecting components 4" refers to the distance between the central axes of two adjacent connecting components 4 in the first direction X. The present embodiment does not limit the specific spacing between two adjacent connecting components 4, and the spacing can be any integer or decimal within 200 mm, such as 50 mm, 100 mm or 200 mm.

[0123] Based on comprehensive considerations such as cost, lightweight and strength, the thickness of the bottom guard plate 3 is usually designed to be around 3 mm. In the present technical solution, it is more reasonable to set the distance between two adjacent connecting components 4 to within 200 mm. On the premise of ensuring that the mode of the bottom guard plate 3 area between the two adjacent connecting components 4 meets the requirements, the production cost can also be controlled by controlling the setting density of the connecting components 4.

[0124] In some embodiments, a plurality of connection components 4 are provided in the extended plane of the bottom plate 11 ; the distance between the connection components 4 at the periphery and the edge of the bearing area 111 a is less than or equal to 200 mm.

[0125] It should be noted that the edge of the bearing area 111a is usually surrounded by the connecting area 111b, and the bottom plate 11 is connected to the frame 12 or the cross beam, longitudinal beam and other components of the box body 1 through its connecting area 111b. Based on this, it can be understood that the bottom plate 11 can be connected and fixed at the edge of its bearing area 111a; in the extended plane of the bottom plate 11, multiple connecting components 4 are provided, and the multiple connecting components 4 are usually divided into inner and outer parts. The inner connecting components 4 are usually close to the center of the bearing area 111a, and the outer connecting components 4 are usually close to the edge of the bearing area 111a; wherein, "the distance between the connecting components 4 at the periphery and the edge of the bearing area 111a" refers to the distance between the central axis of the connecting components 4 at the periphery in the first direction X and the edge of the bearing area 111a. This embodiment does not limit the specific distance between the connecting components 4 at the periphery and the edge of the bearing area 111a, and the distance can be any integer or decimal within 200mm or 200mm, such as 50mm, 100mm or 200mm.

[0126] Based on comprehensive considerations such as cost, lightweight and strength, the thickness of the bottom guard plate 3 is usually designed to be around 3 mm. In the present technical solution, it is more reasonable to set the distance between the peripheral connecting component 4 and the edge of the load-bearing area 111a to within 200 mm. This can prevent the appearance of a large area of ​​suspended area on the bottom guard plate 3 near the edge of the bottom plate 11, which is beneficial to improving the overall mode of the bottom guard plate 3.

[0127] It should be noted that the above two parallel technical solutions "the distance between two adjacent connecting components 4 is less than 200mm" and "the distance between the peripheral connecting component 4 and the edge of the bearing area 111a is less than 200mm" can be set one by one or at the same time. Obviously, the effect of setting them at the same time is better, and the stiffness and mode of the bottom guard plate 3 are higher.

[0128] See also Figure 3 In some embodiments, the box body 1 also includes a frame 12, the bottom plate 11 is arranged on the side of the frame 12 in the first direction X, and together with the frame 12 defines an installation cavity 1a, and the battery cell 2 is arranged in the installation cavity 1a; the bottom plate 11 and / or the bottom guard plate 3 are connected to the frame 12 by a threaded connection structure.

[0129] It should be noted that the structural form of the box body 1 has been explained in the above embodiment, and this embodiment will not be repeated; there are many types of threaded connection structures, such as self-tapping screws, sealed rivet nuts, bolt nuts, etc., which are not limited in this embodiment; in this solution, the bottom plate 11 and the bottom guard plate 3 can be connected to the surrounding frame 12 through a threaded connection structure, as shown in the following example. Figure 3 As shown in FIG. 1 , the bottom plate 11 overlaps with the edge of the bottom guard plate 3 and the surrounding frame 12 in the first direction X, and is simultaneously connected to the surrounding frame 12 via a threaded connection structure.

[0130] According to the above technical solution, the bottom plate 11, the bottom guard plate 3, and the surrounding frame 12 are firmly connected together through a threaded connection structure, which can significantly improve the rigidity and deformation resistance of the entire box body 1. At the same time, compared with welding and other permanent connection methods, the threaded connection method can reduce the use of reinforcement structure, thereby reducing the total mass of the battery device 100, and the threaded connection method is convenient for disassembly and maintenance.

[0131] See also Figure 3 and Figure 5 In some embodiments, a reinforcement area 3a is formed on the bottom guard plate 3, and the reinforcement area 3a is recessed toward the bottom plate 11 compared to its surrounding area; the connecting component 4 is arranged in the reinforcement area 3a.

[0132] It should be noted that the reinforcement area 3a of the bottom guard plate 3 is generally formed by stamping, and of course it is not excluded that it is formed by other methods such as casting. "The reinforcement area 3a is recessed toward the bottom plate 11 compared to its surrounding area" means that in the first direction X, the reinforcement area 3a is closer to the bottom plate 11 than other areas of the bottom guard plate 3.

[0133] According to the above technical solution, a reinforcement area 3a is processed on the bottom guard plate 3, which can significantly improve the strength and rigidity of the bottom guard plate 3. At the same time, since the reinforcement area 3a is recessed toward the bottom plate 11, the size of the connecting component 4 in the first direction X is reduced, which is beneficial to improving the overall structural stability of the bottom guard plate 3, the connecting component 4 and the bottom plate 11.

[0134] The present application also proposes an electric device, which includes a battery device, and the battery device is used to provide electric energy. The specific structure of the battery device refers to the above embodiment. Since the electric device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the battery device is used to provide electric energy to the electric device, and the electric device includes but is not limited to new energy vehicles such as pure electric vehicles, hybrid vehicles and extended-range vehicles, as well as engineering vehicles such as electric excavators and electric bulldozers, and can also include aircraft such as electric drones and electric passenger aircraft.

[0135] The present application proposes a battery device 100, which includes a box body 1, a bottom guard plate 3 and a connecting assembly 4. The box body 1 includes a frame 12 and a heat exchange plate 11a. The heat exchange plate 11a is arranged on one side of the frame 12 in a first direction X, and is surrounded by the frame 12 to form an installation cavity 1a. A battery cell 2 is arranged in the installation cavity 1a. The bottom guard plate 3 is arranged on the side of the heat exchange plate 11a away from the frame 12, and is connected to the frame 12 through a threaded connection structure. The heat exchange plate 11a has a bearing area 111a corresponding to the battery cell 2. A clearance hole 3b is arranged on the bottom guard plate 3 at a position corresponding to the bearing area 111a. The bearing area 111a includes a flow channel area 1 111a and non-flow channel area 1112a, the heat exchange plate 11a includes a first plate body 111 and a second plate body 112, the first plate body 111 is arranged to receive the battery cell 2, the second plate body 112 is arranged on the side of the first plate body 111 facing the bottom guard plate 3, the second plate body 112 is attached to the first plate body 111 at the non-flow channel area 1112a, and arches toward the bottom guard plate 3 at the flow channel area 1111a, so as to define a heat exchange flow channel 111d together with the first plate body 111, the second plate body 112 is opened at the non-flow channel area 1112a toward the first plate body 111, and defines a receiving groove 111c together with the first plate body 111; the connecting assembly 4 includes connecting bolts 41 that cooperate with each other a and a connecting nut 42a, the bolt head 411 of the connecting bolt 41a has a first end 4111 and a second end 4112 in the first direction X, the second end 4112 of the bolt head 411 is accommodated in the receiving groove 111c fixed to the heat exchange plate 11a, and the peripheral side wall of the second end 4112 is formed with an annular protrusion 4112a, the bolt rod 412 of the connecting bolt 41a is connected to the first end 4111 of the bolt head 411, and is arranged through the clearance hole 3b of the bottom guard plate 3, and is connected to the connecting nut 42a on the side of the bottom guard plate 3 away from the heat exchange plate 11a, the free end of the bolt rod 412 is accommodated in the threaded hole 422a of the connecting nut 42a, and the connecting nut 42a cooperates with the bolt head 411 clamps and fixes the bottom guard plate 3, and an annular groove 421a is formed on the end surface of the connecting nut 42a facing the bottom guard plate 3; the battery device 100 also includes two annular sealing portions 43, one of which is accommodated in the annular groove 421a and abuts against the bottom guard plate 3, and the other annular sealing portion 43 is sleeved on the first end 4111 of the bolt head 411, and abuts against the annular protrusion 4112a of the bottom guard plate 3 and the bolt head 411 respectively; in the extended plane of the heat exchange plate 11a, a plurality of connecting components 4 are arranged, and the distance between two adjacent connecting components 4 is less than 200mm, and the distance between the peripheral connecting components 4 and the edge of the bearing area 111a is less than 200mm.

[0136] The present application also proposes a battery device 100, which includes a box body 1, a bottom guard plate 3 and a connecting assembly 4. The box body 1 includes a frame 12 and a heat exchange plate 11a. The heat exchange plate 11a is arranged on one side of the frame 12 in the first direction X, and is surrounded by the frame 12 to form an installation cavity 1a. A battery cell 2 is arranged in the installation cavity 1a. The bottom guard plate 3 is arranged on the side of the heat exchange plate 11a away from the frame 12, and is connected to the heat exchange plate 11a through a threaded connection structure. The heat exchange plate 11a is connected to the frame 12, and has a bearing area 111a corresponding to the battery cell 2. The bearing area 111a includes a flow channel area 1111a and a non-flow channel area 1112a. The heat exchange plate 11a includes a first plate body 111 and a second plate body 112. The first plate body 111 is provided to receive the battery cell 2, and the second plate body 112 is provided on a side of the first plate body 111 facing the bottom guard plate 3. The second plate body 112 is attached to the non-flow channel area 1112a. The first plate body 111 is arched toward the bottom guard plate 3 at the flow channel area 1111a to define a heat exchange flow channel 111d together with the first plate body 111. The second plate body 112 is opened at the non-flow channel area 1112a toward the first plate body 111, and defines a receiving groove 111c together with the first plate body 111; the connecting component 4 includes a snap-fit ​​male buckle 41b and a snap-fit ​​female buckle 42b, one of which is fixed in the receiving groove 111c of the heat exchange plate 11a, and the other is fixed to the side of the bottom guard plate 3 facing the heat exchange plate 11a, the snap-fit ​​male buckle 41b and the snap-fit ​​female buckle 42b are snap-fitted along the first direction X, and are connected and locked with each other; in the extended plane of the heat exchange plate 11a, a plurality of connecting components 4 are arranged, and the distance between two adjacent connecting components 4 is less than 200mm, and the distance between the connecting components 4 at the periphery and the edge of the bearing area 111a is less than 200mm.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cells; A box body, in which the battery cell is arranged, the box body comprises a bottom plate in a first direction, the bottom plate having a bearing area corresponding to the battery cell; A bottom guard plate is disposed on the box body and is located on a side of the bottom plate away from the battery cell; and A connecting component is arranged on a side of the bottom plate facing the bottom guard plate and corresponds to the bearing area in the first direction. The connecting component includes a first connecting part and a second connecting part. The first connecting part and the second connecting part are rigidly connected and are respectively connected to the bottom plate and the bottom guard plate.

2. The battery device according to claim 1, characterized in that: The bottom guard plate is provided with a clearance hole corresponding to the bearing area, and the first connecting portion and the second connecting portion are connected to each other through the clearance hole; The first connection portion is fixed to the base plate, and the second connection portion is at least partially located on the side of the bottom guard plate facing away from the base plate, and is configured to be movable and adjustable in the first direction relative to the first connection portion to cooperate with the first connection portion to clamp and fix the bottom guard plate.

3. The battery device according to claim 2, characterized in that: One of the first connection part and the second connection part is configured as a connection bolt, and the other one is configured as a connection nut; The connecting bolt has a bolt head and a bolt rod, the bolt rod is inserted into the clearance hole, the connecting nut is connected to the bolt rod, and cooperates with the bolt head to clamp and fix the bottom guard plate.

4. The battery device according to claim 3, characterized in that: An annular sealing portion is arranged between the bolt head of the connecting bolt and / or the connecting nut and the bottom guard plate, and the annular sealing portion is arranged corresponding to the clearance hole.

5. The battery device according to claim 4, characterized in that: An annular groove is formed on the end surface of the connecting nut facing the bottom guard plate, and the annular sealing portion is accommodated in the annular groove.

6. The battery device according to claim 4, characterized in that: The bolt head of the connecting bolt has a first end and a second end located in the first direction, the first end is connected to the bolt rod and abuts against the bottom guard plate, and the peripheral side wall of the second end is formed with an annular protrusion; The annular sealing portion is sleeved on the first end of the bolt head and abuts against the annular protrusion.

7. The battery device according to claim 3, characterized in that: The bolt heads of the connecting bolts are fixed to the base plate.

8. The battery device according to claim 7, characterized in that: The free end of the bolt rod is arranged in the threaded hole of the connecting nut.

9. The battery device according to claim 1, characterized in that: One of the first connection part and the second connection part is configured as a male snap-fit ​​buckle, and the other is configured as a female snap-fit ​​buckle. The male snap-fit ​​buckle and the female snap-fit ​​buckle are snap-fitted with each other along the first direction and are connected and locked with each other.

10. The battery device according to any one of claims 1 to 9, characterized in that: The bottom plate is configured as a heat exchange plate, and the bearing area is formed on the heat exchange plate.

11. The battery device according to claim 10, characterized in that: The bearing area includes a flow channel area and a non-flow channel area; An accommodating groove is formed on the end surface of the heat exchange plate facing the bottom guard plate, and the accommodating groove is arranged corresponding to the non-flow channel area; The first connecting portion or the second connecting portion is disposed in the accommodating groove.

12. The battery device according to claim 11, characterized in that The heat exchange plate comprises: A first plate body is used to receive the battery cell; and A second plate body is arranged on a side of the first plate body facing the bottom guard plate, the second plate body is attached to the first plate body in the non-flow channel area, the second plate body is arched toward the bottom guard plate in the flow channel area, and defines a heat exchange flow channel together with the first plate body; Wherein, the second plate body is arranged at the non-flow channel area toward the opening of the first plate body, and defines the accommodating groove together with the first plate body.

13. The battery device according to any one of claims 1 to 9, characterized in that: In the extended plane of the bottom plate, a plurality of the connecting components are arranged; The distance between two adjacent connection components is less than or equal to 200 mm; And / or, the distance between the connection component at the periphery and the edge of the bearing area is less than or equal to 200 mm.

14. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 13.

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