Battery device and electric appliance

Abstract

The application discloses a battery device and a power utilization device. The battery device comprises a battery cell and a battery box. The battery box comprises a plurality of box walls, one of which is formed as a first box wall; the first box wall comprises a main body wall, which, together with the remaining box walls, encloses a receiving cavity, and the battery cell is arranged in the receiving cavity; the main body wall is provided with a functional part configured to perform medium transmission between the battery device and the outside; and the main body wall has a first surface and a second surface facing away from each other in a first direction, the first surface is configured to enclose the receiving cavity, and at least one of the box walls adjacent to the first box wall protrudes beyond the second surface in the first direction. The technical scheme of the application can improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical appliance. Background Technology

[0002] When battery devices are installed in vehicles and other electrical equipment, they are inevitably subject to impacts and pressure. Therefore, reducing the possibility of damage from pressure on battery devices to improve their reliability is a pressing issue in battery technology. Utility Model Content

[0003] The main objective of this application is to provide a battery device and an electrical appliance designed to improve the reliability of the battery device.

[0004] To achieve the above objectives, the battery device proposed in this application includes: Battery cells; and The battery box includes multiple boxes, one of which forms a first box wall; the first box wall includes a main wall, which, together with the other boxes, forms a cavity, in which a single battery cell is disposed; the main wall is provided with functional components, which are configured to enable the battery device to transmit media to the outside. The main body wall has a first surface and a second surface facing away from each other in a first direction, the first surface being configured to enclose and form an accommodating cavity; In the box wall adjacent to the first box wall, at least one box wall protrudes from the second surface in a first direction.

[0005] The battery device in this application has at least one housing wall adjacent to the first housing wall, which has a second surface located outside the accommodating cavity in the main body wall that protrudes from the first housing wall in a first direction. When the battery device is installed in an electrical appliance and subjected to compressive force from the side facing the first housing wall, the protrusion of at least one adjacent housing wall relative to the second surface allows the compressive force to act on the protruding housing wall, reducing the possibility of the compressive force being transmitted to the main body wall. This, in turn, helps reduce the possibility of compressive damage to the main body wall, leading to short-circuit damage to functional components mounted on the main body wall, thereby improving the reliability of the battery device.

[0006] In some embodiments, the enclosure wall adjacent to the first enclosure wall includes a second enclosure wall, the battery cell is connected to the second enclosure wall, and the second enclosure wall protrudes from the second surface in a first direction.

[0007] Therefore, in the direction of the extension of the intersection line between the second box wall and the first box wall, the second box wall can be formed as a continuous protective structure, which can expand the protection range to resist the extrusion force from the side facing the first box wall, thereby improving the protection effect on the second box wall and the functional components provided on the second box wall.

[0008] In some embodiments, the protrusion distance of the second box wall from the second surface in the first direction is L1, satisfying the relationship: 10 mm ≤ L1 ≤ 20 mm; Therefore, the end of the second box wall that protrudes from the second surface has a relatively suitable distance from the second surface of the main body wall. This can effectively reduce the squeezing force towards the first box wall, which could cause squeezing damage to the main body wall and lead to damage to the functional components installed on the main body wall. It can also ensure that the overall volume of the battery device is not too large, or that the volume of the accommodating cavity is not too small while keeping the overall volume of the battery device unchanged, so that the energy density of the battery device is not too low.

[0009] In some embodiments, the second housing wall is provided with a plurality of parallel second cavities, each second cavity extending along a first direction, or each second cavity extending along a second direction, and the battery cell is disposed on the side of the second housing wall in a third direction, wherein the first direction, the second direction and the third direction intersect each other.

[0010] Therefore, the weight of the second box wall can be reduced by using the second cavity, as well as the amount of material required for its manufacture, thus lowering manufacturing costs. Simultaneously, the second cavity allows the second box wall to absorb compressive stress through deformation, thereby improving its compressive strength and enhancing its protective effect on the first box wall.

[0011] In some embodiments, the plurality of box walls further includes two relatively spaced third box walls, which are adjacent to both the first box wall and the second box wall; in a first direction, at least a portion of the main body wall is accommodated between the two third box walls.

[0012] Therefore, the main body wall can be accommodated and installed using the gap space between the two third box walls. This allows the first box wall to be closer to the center of the receiving cavity in the first direction. Consequently, when the second box wall protrudes from the second surface, the end protruding from the second surface will not be too far from the center of the receiving cavity in the first direction, thus reducing the overall volume of the battery device. Simultaneously, the two third box walls also provide protection for the first box wall in the direction of their arrangement, resisting the compressive force along the arrangement of the two third box walls and reducing the possibility of it being damaged by compression.

[0013] In some embodiments, the enclosure wall adjacent to the first enclosure wall includes a second enclosure wall and two opposing third enclosure walls; the battery cell is connected to the second enclosure wall, and the third enclosure wall is adjacent to both the first and second enclosure walls; in a first direction, at least one third enclosure wall protrudes from the second surface.

[0014] Therefore, by protruding from the second surface, the third box wall can protect the first box wall in the first direction, resisting the compressive force from the side facing the first box wall. Simultaneously, in the arrangement direction of the two third box walls, at least one of the two ends of the first box wall can be covered by at least one third box wall to resist the compressive force along the arrangement direction of the two third box walls, further improving the protective effect of the third box wall on the first box wall.

[0015] In some embodiments, the protrusion distance of the third box wall from the second surface in the first direction is L2, satisfying the relationship: 10 mm ≤ L2 ≤ 20 mm.

[0016] Therefore, the end of the third box wall that protrudes from the second surface has a relatively suitable distance from the second surface of the main body wall. This can effectively reduce the squeezing force from the side facing the first box wall, which could cause squeezing damage to the main body wall and lead to damage to the functional components installed on the main body wall. It can also ensure that the volume of the accommodating cavity is not too small, so that the energy density of the battery device is not too low.

[0017] In some embodiments, the third box wall is provided with a plurality of parallel first cavities, each first cavity extending along a first direction; or, the arrangement direction of the two third box walls is a second direction, each first cavity extending along a third direction, and the first direction, the second direction and the third direction intersect each other.

[0018] Therefore, the weight of the third box wall can be reduced by the first cavity, as well as the amount of material required for its manufacture, thus lowering manufacturing costs. Simultaneously, the first cavity allows the third box wall to absorb compressive stress through deformation, thereby improving its compressive strength and enhancing its protective effect against the first box wall.

[0019] In some embodiments, the main wall is configured as a solid panel.

[0020] Therefore, the structure of the main wall is relatively simple, and when machining mounting holes for installing functional components on the main wall, the corresponding hole machining can be carried out more conveniently, so as to improve the convenience of battery device processing and manufacturing.

[0021] In some embodiments, the first box wall is a stamped integral structure.

[0022] Therefore, the interior of the first casing wall is free of defects such as air bubbles, which improves its strength and prevents weld defects that could compromise the battery box's sealing during subsequent welding and installation. Furthermore, the one-piece stamping process is relatively simple and also improves the manufacturing efficiency of the first casing wall.

[0023] In some embodiments, the first box wall further includes at least one abutment plate, which is connected to the main body wall and is arranged at an angle; the abutment plate abuts against at least one of the box walls adjacent to the first box wall.

[0024] Therefore, the strength of the edge of the first box wall can be improved, reducing the possibility of deformation and damage. At the same time, the abutment plate can also abut against at least one of the box walls adjacent to the first box wall, so that the abutment plate can increase the connection area and perform positioning and fitting, thereby improving the stability and accuracy of the installation of the first box wall.

[0025] In some embodiments, the abutment plate protrudes from the first surface.

[0026] Therefore, the abutment plate is set on the inside of the main wall, which can be hidden so that it will not be squeezed from the first direction, further improving the reliability of the first box wall and reducing the possibility of it being squeezed and damaged.

[0027] In some embodiments, the abutment plate protrudes from the second surface, and the abutment plate has a third surface facing away from the main body wall on the side away from the main body wall in the first direction; the box wall adjacent to the first box wall includes a second box wall, the battery cell is connected to the second box wall, and the second box wall protrudes from the third surface in the first direction.

[0028] Therefore, by protruding the third surface from the second box wall, the compressive force towards the first box wall can be resisted in advance, making it less likely for the compressive force to cause pressure on the abutment plate, thus improving the reliability of the first box wall.

[0029] In some embodiments, the first box wall includes two abutment plates disposed on the same side of the main body wall in a first direction and abutting against two relatively spaced box walls respectively.

[0030] Therefore, abutment plates are provided on opposite sides of the main body wall, so that the other two sides of the main body wall are flat surfaces, so as to cooperate with the adjacent box wall and improve the installation stability and sealing of the battery box.

[0031] In some embodiments, at least one of the box walls adjacent to the first box wall is welded to the first box wall.

[0032] Therefore, welding offers the advantages of stability and reliability, which in turn improves the stability of the first enclosure wall installation, thereby further enhancing its reliability. Simultaneously, by fusing the welded connection into a single unit, gaps can be eliminated, thus improving the battery box's sealing performance.

[0033] In some embodiments, the enclosure wall adjacent to the first enclosure wall includes a second enclosure wall, and the battery cell is connected to the second enclosure wall; the second enclosure wall and the first enclosure wall are welded to form a first weld, the first weld including a first sub-weld and a second sub-weld; in a first direction, the first sub-weld and the second sub-weld are respectively located on both sides of the first enclosure wall.

[0034] Therefore, welding the first box wall to the second box wall allows the first box wall to be connected at all points along its length, thereby improving the stability of the first box wall installation. Furthermore, first sub-welds and second sub-welds are provided on opposite sides of the first box wall, allowing both sides of the first box wall to be welded to the second box wall, further enhancing the stability of the first box wall installation.

[0035] In some embodiments, the first box wall further includes at least one abutment plate, which is connected to the main body wall and is arranged at an angle, and the abutment plate abuts against at least one of the box walls adjacent to the first box wall; one abutment plate is formed as a first abutment plate, which abuts against the second box wall; a first sub-weld is provided on the side of the main body wall opposite to the first abutment plate, and a second sub-weld is provided at the connection between the main body wall and the first abutment plate.

[0036] Therefore, after welding the side of the first box wall facing away from the first abutment plate, when it is flipped over to weld the other side of the first box wall, the first abutment plate can meet the weld performance requirements and help improve the strength of the first weld, thereby further improving the stability of the installation of the first box wall.

[0037] In some embodiments, the enclosure wall adjacent to the first enclosure wall includes a second enclosure wall and a third enclosure wall, and the battery cell is connected to the second enclosure wall; the third enclosure wall is adjacent to both the first enclosure wall and the second enclosure wall, and the third enclosure wall is welded to the first enclosure wall to form a second weld; the second weld includes a third sub-weld and a fourth sub-weld, and the third sub-weld and the fourth sub-weld are respectively located on both sides of the first enclosure wall in a first direction.

[0038] Therefore, the first box wall and the third box wall are welded together, and a third sub-weld and a fourth sub-weld are provided on opposite sides of the first box wall, so that the two ends of the first box wall in the length direction can also be stably welded and limited to the third box wall, which is conducive to further improving the stability of the installation of the first box wall.

[0039] In some embodiments, the enclosure wall adjacent to the first enclosure wall includes a second enclosure wall and a fourth enclosure wall, the battery cell is connected to the second enclosure wall, and the fourth enclosure wall is spaced apart from the second enclosure wall; the battery device also includes a seal, at least a portion of which is sandwiched between the fourth enclosure wall and the first enclosure wall.

[0040] Therefore, a seal is provided between the fourth box wall and the second box wall to further improve the sealing performance of the battery box.

[0041] In some embodiments, the first box wall further includes at least one abutment plate, which is connected to the main body wall and is arranged at an angle, and the abutment plate abuts against at least one of the box walls adjacent to the first box wall; one abutment plate is formed as a second abutment plate, which abuts against the fourth box wall; at least a portion of the seal is sandwiched between the fourth box wall and the second abutment plate.

[0042] This increases the contact area, thereby improving the stability of the seal installation.

[0043] In some embodiments, the functional component includes at least one of a connector, a water pipe fitting, and an explosion-proof valve.

[0044] Therefore, by using the adjacent box wall protruding from the second surface to provide anti-compression protection for the first box wall, the possibility of at least one of the connectors, water pipe joints, and explosion-proof valves being damaged by compression can be reduced.

[0045] In some embodiments, the enclosure wall adjacent to the first enclosure wall includes a second enclosure wall and two relatively spaced third enclosure walls, and the battery cell is connected to the second enclosure wall; The arrangement direction of the two third box walls is the second direction. In the second direction, the distance between the two opposite sides of the first box wall in the third direction is either constant or variable.

[0046] Therefore, setting a constant distance between the two opposite sides of the first casing wall in the third direction allows for a more regular shape of the first casing wall, which in turn improves the ease of manufacturing the first casing wall. Alternatively, varying the distance between the two opposite sides of the first casing wall in the third direction allows for a relatively larger distance in certain areas without increasing the overall volume of the battery device, facilitating the smooth arrangement of functional components or other devices in those areas.

[0047] On the other hand, the electrical equipment proposed in this application includes the battery device in any of the above embodiments. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application; Figure 2 This is a schematic diagram of the structure of an embodiment of the battery device of this application; Figure 3 This is a schematic diagram of the structure of a single battery cell according to an embodiment of this application; Figure 4 This is a structural schematic diagram of one embodiment of the housing in this application; Figure 5 for Figure 4 A magnified view of a portion of point A in the middle; Figure 6 for Figure 4 A structural schematic diagram of the middle box from another perspective; Figure 7 for Figure 6 A magnified view of a portion of point B in the middle; Figure 8 for Figure 4 A partial structural diagram of the middle box; Figure 9 This is a structural schematic diagram of another embodiment of the housing in this application.

[0050] Explanation of icon numbers: 100. Battery assembly; 1. Battery box; 11. Box cover; 12. Box body; 13. Box wall; 14. First box wall; 141. Main body wall; 1411. First surface; 1413. Second surface; 143. Abutment plate; 1433. First abutment plate; 1435. Second abutment plate; 15. Second box wall; 151. First end face; 153. Second cavity; 16. Third box wall; 161. First cavity; 17. Fourth box wall ; 18. First weld; 181. First sub-weld; 183. Second sub-weld; 19. Second weld; 191. Third sub-weld; 193. Fourth sub-weld; 20. Battery cell; 1a. Receptacle; 21. End cap; 21a. Terminal post; 22. Housing; 23. Electrode assembly; 231. Tab; 1000. Vehicle; 200. Controller; 300. Motor; X. First direction; Y. Second direction; Z. Third direction.

[0051] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0053] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0054] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0056] A battery device, or energy storage device, is widely used not only in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. A battery device can include a battery box and individual battery cells housed within the battery box. The battery box can include a box body and a cover that closes to the box body to enclose a cavity containing the individual battery cells. The individual battery cell is the smallest unit that makes up a battery, typically including a casing and an electrode assembly housed within the casing. The electrode assembly is the component in the individual battery cell where the electrochemical reaction actually occurs, and can include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. Furthermore, at least two individual battery cells within the battery box can be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0057] Furthermore, when the battery pack is installed in electrical equipment such as vehicles, other mechanisms of the vehicle or other electrical equipment are arranged around the battery pack. These other mechanisms may inevitably compress the battery pack during a collision or deformation. In this case, the casing walls used to install functional components such as connectors may be damaged by the compression, potentially causing short circuits in the connectors. Simultaneously, the compression of the casing walls can also affect the sealing effect between the functional components and the mounting holes, thus impacting the reliability of the battery pack.

[0058] Therefore, based on the above considerations, in order to prevent the casing wall where the functional components are installed from being easily damaged by compression, and to simplify the structure of the casing wall, this application proposes a novel battery device. This battery device innovatively has at least one casing wall adjacent to the first casing wall protruding in a first direction from the outer surface of the main body wall of the first casing wall used for installing the functional components. This allows the battery device to resist pressure from the side facing the first casing wall by the adjacent casing wall protruding from the outer surface of the first casing wall, thereby reducing the possibility of the pressure being transmitted to the main body wall and causing damage. This balances the reliability of the battery device with a simplified structure for the first casing wall.

[0059] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0060] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0061] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0062] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0063] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a battery case 1 and a battery cell 20; the battery case 1 has a receiving cavity 1a, and the battery cell 20 is disposed inside the battery case 1.

[0064] The battery case 1 can be used to form a receiving cavity 1a to provide a space for accommodating the battery cell 20. The battery case 1 can adopt various structures. In some embodiments, the battery case 1 can include a cover 11 and a body 12 that overlap each other to jointly define the receiving cavity 1a for accommodating the battery cell 20. In this case, the body 12 can provide accommodating support for the battery cell 20. Alternatively, both the cover 11 and the body 12 can be hollow structures with an opening on one side. In this case, the opening side of the cover 11 can cover the opening side of the body 12. Of course, the cover 11 can also be a plate-like structure and cover the opening side of the body 12. In addition, the battery case 1 formed by the cover 11 and the body 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0065] A battery cell 20 refers to the smallest unit that makes up the battery device 100. There can be multiple battery cells 20. Multiple battery cells 20 can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Furthermore, multiple battery cells 20 can be arranged in one direction to form a battery pack. The battery device 100 may consist of only one battery pack, or it may consist of at least two battery packs arranged side-by-side.

[0066] In addition, the battery device 100 may include other structures, such as busbars, for electrical connection between multiple battery cells 20. Furthermore, each battery cell 20 may be a secondary or primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, cuboid, or other shapes.

[0067] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell 20 provided in some embodiments of this application. The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0068] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure or impact, giving battery cell 20 higher structural strength and improving reliability. Functional components such as terminals 21a can be provided on end cap 21. Terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating structure can also be provided on the inner side of end cap 21. The insulating structure can be used to isolate electrical components inside housing 22 from end cap 21 to reduce the risk of short circuits. For example, the insulating structure can be made of plastic, rubber, etc.

[0069] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0070] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the electrode body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 231. The positive and negative tabs may be located together at one end of the electrode body or separately at both ends of the electrode body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 231 connect to the terminals 21a to form a current loop.

[0071] Please refer to the reference. Figure 2 ,as well as Figures 4 to 7 In one embodiment of this application, the battery box 1 includes a plurality of box walls 13, one of which is formed as a first box wall 14; the first box wall 14 includes a main wall 141, the main wall 141 and the other box walls 13 enclose a cavity 1a, and a battery cell 20 is disposed in the cavity 1a; the main wall 141 is provided with a functional component, which is configured to allow the battery device 100 to transmit media with the outside; the main wall 141 has a first surface 1411 and a second surface 1413 facing each other in a first direction X, the first surface 1411 being configured to enclose the cavity 1a; among the box walls 13 adjacent to the first box wall 14, at least one box wall 13 protrudes from the second surface 1413 in the first direction X.

[0072] The first enclosure wall 14 can be equipped with functional components installed on the main body wall 141. These functional components are used for media transmission between the battery device 100 and the outside. For example, the functional component may include a connector, which can be a high-voltage connector or a high-voltage connector, to establish an electrical connection between the battery device 100 and the vehicle 1000 for media transmission. Alternatively, the functional component may be a water pipe connector or an explosion-proof valve. The water pipe connector connects the liquid cooling plate in the battery device 100 that exchanges heat with the individual battery cells 20 to the external coolant circulation system for coolant transmission. The explosion-proof valve allows for venting and depressurization of the battery device 100 in the event of thermal runaway, facilitating the transmission of gaseous media. Therefore, this application does not limit the type of functional component; it can include at least one of connectors, water pipe connectors, and explosion-proof valves.

[0073] The main body wall 141 and the other box walls 13 enclose and form the receiving cavity 1a. This means that the first box wall 14 mainly uses the main body wall 141 to enclose and form the receiving cavity 1a with the other box walls 13, so that the first box wall 14 can be entirely composed of the main body wall 141; of course, the first box wall 14 can also further include an abutment plate 143 as described below. The main body wall 141 can be a solid plate as described below, or it can be a hollow plate or hollow beam structure. This application does not limit the structural type of the main body wall 141.

[0074] The main body wall 141 has a first surface 1411 and a second surface 1413 facing each other in the first direction X. The first surface 1411 is configured to enclose and form a receiving cavity 1a, meaning that the first surface 1411 can be the inner surface of the main body wall 141 located within the receiving cavity 1a, and the second surface 1413 can be the outer surface of the main body wall 141 located outside the receiving cavity 1a. The first direction X can also be described as the thickness direction of the main body wall 141. When the battery device 100 is in a normal installation and use state, this first direction X can be a horizontal direction.

[0075] The enclosure wall 13 adjacent to the first enclosure wall 14 may include four enclosure walls 13, such as: a second enclosure wall 15 for connecting and installing the battery cell 20 as described below, two third enclosure walls 16 adjacent to the first enclosure wall 14 and the second enclosure wall 15, and a fourth enclosure wall 17 spaced apart from the second enclosure wall 15. When the battery device 100 is in normal installation and use, the second enclosure wall 15 may form the bottom wall of the enclosure body 12; the first enclosure wall 14, the third enclosure wall 16, and the enclosure wall 13 opposite to the first enclosure wall 14 may form the side walls of the enclosure body 12. When the battery box 1 includes a cover 11 and an enclosure body 12 as described above, the second enclosure wall 15 and the enclosure wall 13 adjacent to the second enclosure wall 15 may be connected to form the enclosure body 12, while the enclosure wall 13 opposite to the second enclosure wall 15 may form the cover 11. In addition, the second box wall 15, the third box wall 16, the fourth box wall 17, etc. can be set as solid plates, or they can be set as hollow plates. This application does not limit the structural type of the second box wall 15.

[0076] At least one box wall 13 adjacent to the first box wall 14 protrudes from the second surface 1413 in the first direction X. This means that any one of the second box wall 15, the third box wall 16, and the fourth box wall 17 may protrude from the second surface 1413 in the first direction X; or at least two or all of the second box wall 15, the third box wall 16, and the fourth box wall 17 may protrude from the second surface 1413 in the first direction X. Furthermore, "protruding from the second surface 1413" means that the end face of the box wall 13 adjacent to the first box wall 14 is spaced apart from the second surface 1413 in the first direction X. For example, when the second housing wall 15 protrudes from the second surface 1413, the first housing wall 14 may have a first end face 151 and a second end face facing away from each other in the first direction X. When the first end face 151 and the second housing wall 15 are located at the same end of the first housing wall 14, the first end face 151 and the second surface 1413 may be spaced apart in the first direction X, and the second surface 1413 is located between the first end face 151 and the first surface 1411. In this way, when the battery device 100 is subjected to a compressive force from the side facing the main body wall 141 in the first direction X, the compressive force can mainly act on the first end face 151 of the second housing wall 15, and be resisted by the second housing wall 15, reducing the possibility of the compressive force being transmitted to the first housing wall 14, thereby protecting the main body wall 141. The extrusion force can be generated when the battery device 100 is installed on the vehicle 1000, and the vehicle 1000 has a mechanism on the side facing the first box wall 14 of the battery device 100. When the vehicle 1000 is deformed due to a collision, the mechanism will compress the second box wall 15 to form a corresponding extrusion force.

[0077] The battery device 100 in this application has at least one housing wall 13 adjacent to the first housing wall 14, with a second surface 1413 protruding from the main body wall 141 of the first housing wall 14 in the first direction X, located outside the accommodating cavity 1a. When the battery device 100 is installed in an electrical appliance and subjected to pressure from the side facing the first housing wall 14, the protrusion of the at least one adjacent housing wall 13 relative to the second surface 1413 allows the pressure to act on the protruding adjacent housing wall 13, reducing the possibility of the pressure being transmitted to the main body wall 141. This helps reduce the possibility of damage to the main body wall 141 caused by pressure, leading to short circuit damage to the connector installed on the main body wall 141, thereby improving the reliability of the battery device 100.

[0078] Please refer to the reference. Figure 2 , Figure 4 , Figure 5 as well as Figure 8 In one embodiment of this application, the plurality of enclosure walls 13 further includes a second enclosure wall 15, which is adjacent to the first enclosure wall 14; the battery cell 20 is connected to the second enclosure wall 15, and the second enclosure wall 15 protrudes from the second surface 1413 in the first direction X.

[0079] The second wall 15 can be used to install the battery cell 20 as a supporting component for the battery cell 20.

[0080] In this embodiment, the second box wall 15 is provided to protrude from the second surface 1413, and the second box wall 15 and the first box wall 14 form a horizontal intersection line intersecting in the first direction X. In the extension direction of the horizontal intersection line, the second box wall 15 can be formed as a continuous protective structure, which can expand the protection range to resist the extrusion force towards the first box wall 14, thereby improving the protection effect on the second box wall 15 and the functional components provided on the second box wall 15.

[0081] Please refer to the reference. Figure 4 , Figure 5 as well as Figure 8 In one embodiment of this application, the second box wall 15 protrudes from the second surface 1413 in the first direction X by a protrusion distance L1, satisfying the relationship: 10 mm ≤ L1 ≤ 20 mm.

[0082] The protrusion distance L1 is the distance between the first end face 151 of the second box wall 15 and the second surface 1413 of the main body wall 141 in the first direction X.

[0083] In this embodiment, if the distance L is set too small, the second surface 1413 of the main body wall 141 will be too close to the first end face 151 of the second box wall 15. Consequently, if the mechanism on the vehicle 1000 located on the side of the first box wall 14 undergoes excessive deformation, it may cause compression to the main body wall 141. If the distance L is set too large, the overall volume of the battery device 100 will be too large, or if the overall volume remains unchanged, it will affect the space of the accommodating cavity 1a and thus affect the energy density of the battery device 100. Therefore, in order to balance the protective function of the first housing wall 14 with the overall volume or energy density of the battery device 100, the distance L1 is set between 10 mm and 20 mm. This ensures that the end of the second housing wall 15 protruding from the second surface 1413 has a relatively suitable distance from the second surface 1413 of the main body wall 141. This effectively reduces the squeezing force from the side facing the first housing wall 14, which could cause damage to the main body wall 141 and damage to the functional components installed on the main body wall 141. It also prevents the overall volume of the battery device 100 from being too large, or the volume of the accommodating cavity 1a from being too small, thus ensuring that the energy density of the battery device 100 is not too low. The distance L1 can be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, or 20 mm, or any value within the above range.

[0084] Please refer to the reference. Figure 4 , Figure 5 as well as Figure 8 In one embodiment of this application, the plurality of box walls 13 further includes two third box walls 16 that are spaced apart from each other in the second direction Y, the second direction Y intersecting the first direction X, and the third box walls 16 are adjacent to the first box wall 14 and the second box wall 15 at the same time; in the first direction X, at least a portion of the main body wall 141 is accommodated between the two third box walls 16.

[0085] The second direction Y can also be described as the thickness direction of the third box wall 16. When the first direction X is a horizontal direction as described above, the second direction Y can be another horizontal direction. The third box wall 16 is simultaneously adjacent to the first box wall 14 and the second box wall 15, meaning that the third box wall 16 is adjacent to both the first box wall 14 and the second box wall 15. At least a portion of the main body wall 141 is accommodated between the two third box walls 16, meaning that the main body wall 141 can be partially disposed within the gap space between the two third box walls 16, or the entire main body wall 141 can be disposed within the gap space between the two third box walls 16. That is, the third box wall 16 can protrude from the second surface 1413 in the first direction X, or it can be flush with the second surface 1413, or the end face of the third box wall 16 near the first box wall 14 in the first direction X is located between the second surface 1413 and the first surface 1411.

[0086] In this embodiment, the main body wall 141 can be accommodated and installed using the gap space between the two third box walls 16. This allows the first box wall 14 to be closer to the center of the receiving cavity 1a in the first direction X. Consequently, when the second box wall 15 protrudes from the second surface 1413, the end protruding from the second surface 1413 will not be too far from the center of the receiving cavity 1a in the first direction X, thus reducing the overall volume of the battery device 100. Simultaneously, in the second direction Y, the two third box walls 16 also provide protection for the main body wall 141, reducing the possibility of it being damaged by compression in the second direction Y, further improving the reliability of the battery device 100.

[0087] Please refer to the reference. Figure 4 , Figure 5 as well as Figure 8 In one embodiment of this application, at least one third box wall 16 protrudes from the second surface 1413 in the first direction X.

[0088] In this embodiment, the main body wall 141 can be more fully accommodated in the gap space between the two third housing walls 16, allowing it to be further closer to the center of the receiving cavity 1a in the first direction X. This also allows the end of the second housing wall 15 protruding from the second surface 1413 to be positioned closer to the center of the receiving cavity 1a, thereby further reducing the overall volume of the battery device 100. Simultaneously, in the arrangement direction of the two third housing walls 16, the two third housing walls 16 can better cover both ends of the first housing wall 14, further improving the protective effect of the third housing walls 16 on the first housing wall 14.

[0089] Please refer to the reference. Figure 4 , Figure 5 as well as Figure 8 In some embodiments, the third box wall 16 protrudes from the second surface 1413 in the first direction X by a distance L2, satisfying the relationship: 10 mm ≤ L2 ≤ 20 mm.

[0090] In this embodiment, the protrusion distance L2 is set between 10 mm and 20 mm, so that the end of the third box wall 16 protruding from the second surface 1413 has a relatively suitable distance from the second surface 1413 of the main body wall 141. This can effectively reduce the squeezing force towards the first box wall 14, which could cause damage to the main body wall 141 and lead to damage to the functional components installed on the main body wall 141. It can also ensure that the volume of the accommodating cavity 1a is not too small, thus ensuring that the energy density of the battery device 100 is not too low. The distance L2 can be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, or 20 mm, or any value within the above range.

[0091] Please refer to the reference. Figure 4 , Figure 5 as well as Figure 8 In one embodiment of this application, to improve the protection of the first housing wall 14 and the functional components disposed on the first housing wall 14, the second housing wall 15 and the third housing wall 16 can be simultaneously configured as second surfaces 1413 protruding from the main body wall 141 in the first direction X. In this case, the third housing wall 16 can be flush with the first end face 151 of the second housing wall 15 to improve the regularity and overall strength of the battery box 1. Of course, the third housing wall 16 and the first end face 151 of the second housing wall 15 can also be non-flush, for example, the second housing wall 15 protrudes from the third housing wall 16 in the first direction X.

[0092] In one embodiment of this application, in order to expand the space of the accommodating cavity 1a and thus increase the energy density of the battery device 100, the third box wall 16 may be configured to abut against the first surface 1411. The abutting configuration proposed in this application refers to either direct contact between the two abutting surfaces, or the presence of other objects between them.

[0093] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the third box wall 16 is provided with a plurality of first cavities 161 arranged side by side, each first cavity 161 extending along a first direction X.

[0094] Multiple side-by-side first cavities 161 allow the third box wall 16 to be formed as a profile structure.

[0095] In this embodiment, the weight of the third housing wall 16 can be reduced by the first cavity 161, as well as the amount of material required for its manufacture, thus lowering manufacturing costs. Simultaneously, the first cavity 161 allows the outer surface of the third housing wall 16 to deform inwards towards the first cavity 161 when subjected to compressive force in the second direction Y, absorbing the compressive impact and improving the protective effect of the third housing wall 16 on components such as the battery cell 20 and the first housing wall 14. Furthermore, each first cavity 161 extends along the first direction X, such that multiple first cavities 161 are arranged along the third direction Z on the cross-section where the third housing wall 16 intersects in the first direction X. In this case, the area of ​​the cross-section where the third housing wall 16 intersects in the first direction X is relatively small, thus reducing the number of first cavities 161 and improving the ease of manufacturing the third housing wall 16. The first direction X, the second direction Y, and the third direction Z can intersect in pairs. When the first direction X and the second direction Y are two intersecting horizontal directions, the third direction Z can be a vertical direction. Alternatively, the first direction X and the second direction Y are the length and width directions of the battery device 100, respectively, and the third direction Z is the height direction of the battery device 100.

[0096] Of course, this application is not limited to this. In other embodiments, each first cavity 161 may be provided to extend along a third direction Z.

[0097] In one embodiment of this application, the first cavity 161 may penetrate at least one side of the third box wall 16 in the first direction X, so as to simplify the structure of the first cavity 161 and thereby improve the convenience of processing and manufacturing the third box wall 16.

[0098] In one embodiment of this application, the first cavity 161 can penetrate both sides of the third box wall 16 in the first direction X, so as to further simplify the structure of the first cavity 161. Moreover, the third box wall 16 can be easily manufactured by integral extrusion molding, so that the overall structure of the third box wall 16 has good consistency, high strength, and high production efficiency.

[0099] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the second box wall 15 is provided with a plurality of parallel second cavities 153, each second cavity 153 extending along the first direction X, and the plurality of second cavities 153 arranged along the second direction Y.

[0100] Multiple side-by-side second cavities 153 allow the second box wall 15 to be formed as a profile structure.

[0101] In this embodiment, the weight of the second box wall 15 can be reduced by the second cavity 153, and the material required for manufacturing the second box wall 15 can be reduced, thereby reducing manufacturing costs. Furthermore, since each of the second cavities 153 extends along the first direction X, the second box wall 15 can have better compressive strength in the first direction X, so as to better resist compressive force and reduce the possibility of compressive force being transmitted to the main body wall 141.

[0102] In one embodiment of this application, the second cavity 153 may penetrate at least one side of the second box wall 15 in the first direction X, so as to simplify the structure of the second cavity 153 and thereby improve the convenience of processing and manufacturing the second box wall 15.

[0103] In one embodiment of this application, the second cavity 153 can penetrate both sides of the second box wall 15 in the first direction X, so as to further simplify the structure of the second cavity 153. Moreover, the second box wall 15 can be easily manufactured by integral extrusion molding, so that the overall structure of the second box wall 15 has good consistency, high strength, and high production efficiency.

[0104] In one embodiment of this application, the second cavity 153 can also be formed as a flow channel to allow the introduction of heat exchange media such as water, ethanol, or oil to achieve heat exchange on the battery cell 20 installed in the accommodating cavity 1a. In this case, the second housing wall 15 may include a main body plate and a sealing head. The second cavity 153 penetrates at least one side of the main body plate in the first direction X, forming the opening of the second cavity 153; the sealing head covers the opening of the second cavity 153. At this time, at least the sealing head in the second housing wall 15 protrudes from the second surface 1413 in the first direction X. That is, the first end face 151 described above can be disposed on the sealing head. Moreover, it is possible that only the sealing head protrudes from the second surface 1413 in the first direction X, or that both the sealing head and the main body plate protrude from the second surface 1413 in the first direction X.

[0105] In addition, it should be noted that each second cavity 153 can also be extended along the second direction Y, which also allows the second box wall 15 to absorb deformation through the second cavity 153, thereby improving the compression resistance.

[0106] Please refer to the reference. Figure 4 , Figure 5 as well as Figure 8 In one embodiment of this application, the main body wall 141 is configured as a solid plate.

[0107] In this embodiment, the main body wall 141 is made of a solid plate, which simplifies its structure. This allows for easier machining of mounting holes for connectors and other devices, improving the ease of manufacturing the battery device 100. Furthermore, the main body wall 141 has a relatively small volume, reducing the weight of the battery box 1 and minimizing space usage, thereby increasing the energy density of the battery device 100.

[0108] In one embodiment of this application, the first box wall 14 is configured as a stamped integral structure.

[0109] In this embodiment, the first box wall 14 is configured as a stamped integral structure, which eliminates defects such as air holes inside the first box wall 14, thereby improving its strength. Furthermore, it prevents weld defects that could affect the sealing of the battery box 1 during subsequent welding and installation. This configuration also simplifies the forming process of the first box wall 14 and allows for greater flexibility in its shape, thus improving the ease of manufacturing and application of the first box wall 14. For example, the projection of the first box wall 14 onto a plane perpendicular to the first direction X can be a regular rectangle, such as... Figure 4 As shown; of course, it is also possible that the height of the middle section of the first box wall 14 in the third direction Z is less than the height of the two end sections in the third direction Z, forming an irregular shape, such as Figure 9 As shown.

[0110] Please refer to the reference. Figure 4 , Figure 5 as well as Figure 8 In one embodiment of this application, the first box wall 14 further includes at least one abutment plate 143, which is connected to the main body wall 141 and is arranged at an angle; the abutment plate 143 abuts against at least one of the box walls 13 adjacent to the first box wall 14.

[0111] The abutment plate 143 can be connected to the edge of the main body wall 141 and form an angle with the main body wall 141. The abutment plate 143 can be provided only on one side of the main body wall 141 in the second direction Y or the third direction Z, or it can be provided on adjacent or opposite sides of the main body wall 141, or it can be provided on all sides of the main body wall 141 in all directions. Therefore, the number of abutment plates 143 can be one, two, three, or four, and this application does not limit this. Furthermore, the abutment plate 143 and the main body wall 141 can be an integrally formed structure, for example, manufactured by stamping, injection molding, or die casting. Of course, the abutment plate 143 and the main body wall 141 can also be separate structures, which are then connected together by welding.

[0112] In this embodiment, an abutment plate 143, angled and connected to the edge of the main body wall 141, is provided to improve the strength of the edge of the first box wall 14 and reduce the possibility of deformation and damage. Simultaneously, the abutment plate 143 can also abut against at least one of the adjacent box walls 13, thereby increasing the connection area and providing positioning, thus improving the stability and accuracy of the installation of the first box wall 14.

[0113] Please refer to Figure 8 In one embodiment of this application, the abutment plate 143 protrudes from the first surface 1411.

[0114] In this embodiment, the abutment plate 143 is disposed on the inner side of the main body wall 141, which can achieve a hidden arrangement. This prevents the mechanism on the vehicle 1000 located on the side of the first box wall 14 from being squeezed when it deforms, thereby further improving the reliability of the first box wall 14 and reducing the possibility of it being squeezed and damaged.

[0115] Of course, this application is not limited to this. In other embodiments, the abutment plate 143 may protrude from the second surface 1413. That is, the abutment plate 143 may be disposed on the outer side of the main body wall 141. In this case, the abutment plate 143 has a third surface facing away from the main body wall 141 in the first direction X, and the second box wall 15 protrudes from the third surface in the first direction X, so that when the mechanism on the vehicle 1000 located on one side of the first box wall 14 deforms, it is not easy to squeeze the abutment plate 143 and affect the reliability of the first box wall 14.

[0116] Of course, this application is not limited to this. In other embodiments, when the abutment plate 143 protrudes from the second surface 1413, it may also be flush with the first end face 151 of the second box wall 15.

[0117] Please refer to Figure 8In one embodiment of this application, the first box wall 14 includes two abutment plates 143, which are disposed on the same side of the main body wall 141 in the first direction X and respectively abut against two box walls 13 that are spaced apart from each other.

[0118] The two abutment plates 143 can be set on both sides of the main body wall 141 in the second direction Y, or on both sides of the main body wall 141 in the third direction Z.

[0119] In this embodiment, abutment plates 143 are provided on opposite sides of the main body wall 141, making the other two sides of the main body wall 141 flat surfaces to cooperate with the adjacent box wall 13 and improve the sealing performance of the battery box 1. For example, when abutment plates 143 are provided on both sides of the main body wall 141 in the third direction Z, the main body wall 141 can easily and smoothly abut against the third box wall 16 on both sides in the second direction Y. Of course, abutment plates 143 can also be provided on both sides of the main body wall 141 in the third direction Z.

[0120] Please refer to Figure 8 In one embodiment of this application, an abutment plate 143 is formed as a first abutment plate 1433. The first abutment plate 1433 is disposed on the side of the main body wall 141 in the third direction Z and abuts against the second box wall 15. The first abutment plate 1433 extends along the second direction Y.

[0121] In this embodiment, since the second direction Y is formed as the length direction of the main body wall 141, a first abutting plate 1433 extending along the second direction Y is provided on the side of the main body wall 141 near the second box wall 15. This first abutting plate 1433 can play a reinforcing role at various points along the length direction of the second box wall 15, reducing the possibility that the main body wall 141 is prone to deformation due to compression in the middle due to its long length, so as to improve the compression resistance of the first box wall 14 and further improve the reliability of the first box wall 14.

[0122] Please refer to Figure 8 In one embodiment of this application, abutment plate 143 may be formed as a second abutment plate 1435. The second abutment plate 1435 abuts against a box wall 13 that is relatively spaced from the second box wall 15 in the third direction Z, that is, the box cover 11 or the fourth box wall 17 described below. The second abutment plate 1435 extends along the second direction Y.

[0123] Please refer to the following: Figure 8 In some embodiments, the main body wall 141 may also be provided with a first abutment plate 1433 and a second abutment plate 1435 to further improve the strength of the first box wall 14.

[0124] In one embodiment of this application, at least one of the box walls 13 adjacent to the first box wall 14 is welded to the first box wall 14.

[0125] At least one box wall 13 is welded to the first box wall 14, meaning that the first box wall 14 can be welded to one of the second box wall 15, the third box wall 16, and the fourth box wall 17 described below, or it can be welded to any two or all of them. Furthermore, the main body wall 141 of the first box wall 14 can be welded to at least one adjacent box wall 13, or the abutment plate 143 of the first box wall 14 can be welded to at least one adjacent box wall 13, or both the main body wall 141 and the abutment plate 143 of the first box wall 14 can be welded to at least one adjacent box wall 13 simultaneously. That is, as long as at least one part of the first box wall 14 is welded to at least one adjacent box wall 13, it is acceptable; it is not limited to the main body wall 141, the abutment plate 143, or other parts of the first box wall 14.

[0126] In this embodiment, the first casing wall 14 is welded together. Welding has the advantages of stability and reliability, which helps to improve the installation stability of the first casing wall 14 and thus further improve its reliability. At the same time, by welding and fusing it into a whole, gaps can be eliminated, thereby improving the sealing performance of the battery box 1.

[0127] Please refer to the reference. Figures 4 to 7 In one embodiment of this application, the second box wall 15 is welded to the first box wall 14 to form a first weld 18. The first weld 18 includes a first sub-weld 181 and a second sub-weld 183, which are respectively located on both sides of the first box wall 14 in the first direction X.

[0128] In this embodiment, the first box wall 14 and the second box wall 15 are welded together, so that the first box wall 14 can be connected at all points along its length, thereby improving the stability of the installation of the first box wall 14. Furthermore, a first sub-weld 181 and a second sub-weld 183 are provided on opposite sides of the first box wall 14, so that both sides of the first box wall 14 can be welded to the second box wall 15, thereby further improving the stability of the installation of the first box wall 14.

[0129] Please refer to the reference. Figures 4 to 7 In one embodiment of this application, the first sub-weld 181 is provided on the side of the main body wall 141 opposite to the first abutment plate 1433, and the second sub-weld 183 is provided at the connection between the main body wall 141 and the first abutment plate 1433.

[0130] In this embodiment, the second sub-weld 183, which is located on the same side of the main body wall 141 as the first abutment plate 1433, is set at the connection between the main body wall 141 and the first abutment plate 1433. This allows the first abutment plate 1433 to meet the weld performance requirements when welding the side of the first box wall 14 away from the first abutment plate 1433, and then flipping it over to weld the other side of the main body wall 141, thereby improving the strength of the first weld 18 and further enhancing the stability of the installation of the first box wall 14.

[0131] Please refer to the reference. Figures 4 to 7 In one embodiment of this application, the box wall 13, which is adjacent to both the first box wall 14 and the second box wall 15, is welded to the first box wall 14 to form a second weld 19; the second weld 19 includes a third sub-weld 191 and a fourth sub-weld 193, which are respectively located on both sides of the first box wall 14 in the first direction X.

[0132] Meanwhile, the box wall 13, which is adjacent to the first box wall 14 and the second box wall 15, is also the third box wall 16 described above.

[0133] In this embodiment, the first box wall 14 and the third box wall 16 are welded together, and a third sub-weld 191 and a fourth sub-weld 193 are provided on opposite sides of the first box wall 14, so that the two ends of the first box wall 14 in the length direction can also be stably welded and limited to the third box wall 16, which is conducive to further improving the stability of the installation of the first box wall 14.

[0134] Please refer to Figure 2 In one embodiment of this application, the plurality of enclosure walls 13 further includes a fourth enclosure wall 17, which is spaced apart from the second enclosure wall 15; the battery device 100 also includes a seal, at least a portion of which is sandwiched between the fourth enclosure wall 17 and the first enclosure wall 14.

[0135] The fourth box wall 17 is formed as the box cover 11 as described above. The fourth box wall 17 can be a plate structure, or it can be a cover structure with one open end. At least a portion of the seal is sandwiched between the fourth box wall 17 and the first box wall 14. This means that the seal can be provided only between the fourth box wall 17 and the first box wall 14, or the seal can be formed as a ring structure, so that there is also a seal between the fourth box wall 17 and other box walls 13. That is, a seal is provided between the box cover 11 and the box body 12. The seal material can be rubber or silicone.

[0136] Please refer to the reference. Figure 4 , Figure 5 as well as Figure 8In this embodiment, a sealing element is provided between the fourth box wall 17 and the second box wall 15, which can further improve the sealing performance of the battery box 1.

[0137] In one embodiment of this application, in order to increase the contact area and improve the stability of the seal installation, at least a portion of the seal is sandwiched between the fourth box wall 17 and the second abutment plate 1435.

[0138] In one embodiment of this application, in the second direction Y, the distance between the two opposite sides of the first box wall 14 in the third direction Z is constant, that is, it remains unchanged, such as Figure 4 As shown. At this point, the structure of the first box wall 14 can be relatively simple, which in turn facilitates its processing and manufacturing.

[0139] Please refer to Figure 9 In one embodiment of this application, in the second direction Y, the distance between the two sides of the first box wall 14 in the third direction Z is varied.

[0140] The variable setting refers to the fact that at least two sections of the first box wall 14 have different distances between their opposite sides in the third direction Z. For example, in the second direction Y, the distance between the opposite sides of the first box wall 14 in the third direction Z first increases and then decreases, resulting in the distance between the middle section and its opposite sides in the third direction Z being greater than the distance between the two end sections in the third direction Z. Alternatively, the distance between the two end sections and their opposite sides in the third direction Z can be set to be greater than the distance between the middle section and its opposite sides in the third direction Z. Or, the distance between the opposite sides of the first box wall 14 in the third direction Z can be set to gradually increase from one end to the other in the first direction X.

[0141] In this embodiment, without increasing the overall volume of the battery device 100, the distance between the two sides of the first box wall 14 in the third direction Z can be set relatively large in a local area, so as to smoothly arrange the corresponding functional components or other devices in that area.

[0142] Please refer to the reference. Figures 2 to 8In one embodiment of this application, a battery device 100 includes a battery cell 20 and a battery case 1; the battery case 1 includes a plurality of case walls 13, wherein two adjacent case walls 13 are respectively formed as a first case wall 14 and a second case wall 15; the first case wall 14 includes a main body wall 141, which together with the other case walls 13 forms a receiving cavity 1a; the battery cell 20 is disposed in the receiving cavity 1a and connected to the second case wall 15, and the main body wall 141 is provided with a connector electrically connected to the battery cell 20; the main body wall 141 has a first surface 1411 and a second surface 1413 facing each other in a first direction X, the first surface 1411 is configured to enclose and form the receiving cavity 1a, and the second case wall 15 protrudes from the second surface 1413 in the first direction X. The plurality of box walls 13 also includes two relatively spaced third box walls 16. The third box walls 16 protrude from the second surface 1413 in the first direction X, and the end of the third box wall 16 near the first box wall 14 in the first direction X is flush with the first box wall 14. The protrusion distance of the second box wall 15 from the second surface 1413 in the first direction X is L1, satisfying the relationship: 10 mm ≤ L1 ≤ 20 mm. The main body wall 141 is configured as a solid plate. The first box wall 14 also includes two abutment plates 143, which are connected to the main body wall 141 and set at an angle. The two abutment plates 143 abut against the second box wall 15 and a fourth box wall 17 relatively spaced from the second box wall 15, respectively. The abutment plates 143 and the main body wall 141 are configured as a stamped integral structure, and the abutment plates 143 protrude from the first surface 1411.

[0143] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, include: Battery cell; and A battery box, comprising multiple boxes, one of which is formed as a first box wall; the first box wall includes a main wall, which, together with the other boxes, forms a receiving cavity, in which a single battery cell is disposed; the main wall is provided with functional components, which are configured to facilitate medium transmission between the battery device and the outside. The main body wall has a first surface and a second surface facing away from each other in a first direction, the first surface being configured to enclose and form the accommodating cavity; In the box walls adjacent to the first box wall, at least one of the box walls protrudes from the second surface in the first direction.

2. The battery device as claimed in claim 1, characterized in that, The enclosure wall adjacent to the first enclosure wall includes a second enclosure wall, the battery cell is connected to the second enclosure wall, and the second enclosure wall protrudes from the second surface in the first direction.

3. The battery device as claimed in claim 2, characterized in that, The second box wall protrudes from the second surface in the first direction by a distance L1, satisfying the relationship: 10 mm ≤ L1 ≤ 20 mm; And / or, The second box wall is provided with a plurality of parallel second cavities, each of the second cavities extending along the first direction, or each of the second cavities extending along the second direction. The battery cell is disposed on the side of the second box wall in the third direction, and the first direction, the second direction and the third direction intersect each other. And / or, The plurality of box walls also include two relatively spaced third box walls, which are adjacent to both the first box wall and the second box wall; In the first direction, at least a portion of the main body wall is accommodated between the two third box walls.

4. The battery device as claimed in claim 1, characterized in that, The box wall adjacent to the first box wall includes a second box wall and two relatively spaced third box walls; The battery cell is connected to the second box wall, and the third box wall is adjacent to both the first box wall and the second box wall. In the first direction, at least one of the third box walls protrudes from the second surface.

5. The battery device as claimed in claim 4, characterized in that, The protrusion distance of the third box wall from the second surface in the first direction is L2, which satisfies the relationship: 10 mm ≤ L2 ≤ 20 mm; And / or, The third box wall is provided with a plurality of parallel first cavities, each of which extends along the first direction; or, the arrangement direction of the two third box walls is the second direction, each of the first cavities extends along the third direction, and the first direction, the second direction and the third direction intersect each other.

6. The battery device as claimed in claim 1, characterized in that, The first box wall also includes at least one abutment plate, which is connected to the main body wall and is set at an angle; The abutment plate abuts against at least one of the boxes adjacent to the first box wall.

7. The battery device as claimed in claim 6, characterized in that, The abutment plate protrudes from the first surface; or, The abutment plate protrudes from the second surface, and the side of the abutment plate away from the main body wall has a third surface facing away from the main body wall; the box wall adjacent to the first box wall includes a second box wall, the battery cell is connected to the second box wall, and the second box wall protrudes from the third surface in the first direction.

8. The battery device as claimed in claim 6, characterized in that, The first box wall includes two abutment plates, which are disposed on the same side of the main body wall in the first direction and abut against the two box walls that are relatively spaced apart.

9. The battery device as claimed in claim 1, characterized in that, In the box walls adjacent to the first box wall, at least one of the box walls is welded to the first box wall.

10. The battery device as claimed in claim 9, characterized in that, The enclosure wall adjacent to the first enclosure wall includes a second enclosure wall, and the battery cell is connected to the second enclosure wall; The second box wall is welded to the first box wall to form a first weld, the first weld including a first sub-weld and a second sub-weld; In the first direction, the first sub-weld and the second sub-weld are respectively located on both sides of the first box wall.

11. The battery device as claimed in claim 10, characterized in that, The first box wall further includes at least one abutment plate, which is connected to the main body wall and is arranged at an angle, and the abutment plate abuts against at least one of the box walls adjacent to the first box wall; The aforementioned abutment plate is formed as a first abutment plate, and the first abutment plate abuts against the second box wall; The first sub-weld is located on the side of the main wall opposite to the first abutment plate, and the second sub-weld is located at the connection between the main wall and the first abutment plate.

12. The battery device as claimed in claim 9, characterized in that, The enclosure wall adjacent to the first enclosure wall includes a second enclosure wall and a third enclosure wall, and the battery cell is connected to the second enclosure wall; The third box wall is adjacent to both the first box wall and the second box wall, and the third box wall is welded to the first box wall to form a second weld. The second weld includes a third sub-weld and a fourth sub-weld, which are respectively located on both sides of the first box wall in the first direction.

13. The battery device as claimed in claim 1, characterized in that, The enclosure wall adjacent to the first enclosure wall includes a second enclosure wall and a fourth enclosure wall, the battery cell is connected to the second enclosure wall, and the fourth enclosure wall is spaced apart from the second enclosure wall; The battery device further includes a seal, at least a portion of which is sandwiched between the fourth housing wall and the first housing wall.

14. The battery device as claimed in claim 13, characterized in that, The first box wall further includes at least one abutment plate, which is connected to the main body wall and is arranged at an angle, and the abutment plate abuts against at least one of the box walls adjacent to the first box wall; The abutment plate is formed into a second abutment plate, and the second abutment plate abuts against the fourth box wall; At least a portion of the seal is sandwiched between the fourth box wall and the second abutment plate.

15. The battery device as claimed in claim 1, characterized in that, The enclosure wall adjacent to the first enclosure wall includes a second enclosure wall and two relatively spaced third enclosure walls, and the battery cell is connected to the second enclosure wall; The arrangement direction of the two third box walls is the second direction. In the second direction, the distance between the two opposite sides of the first box wall in the third direction is either constant or variable.

16. The battery device according to any one of claims 1 to 15, characterized in that, The main wall is configured as a solid plate.

17. The battery device according to any one of claims 1 to 15, characterized in that, The first box wall is a one-piece stamped structure; And / or, the functional component includes at least one of a connector, a water pipe fitting, and an explosion-proof valve.

18. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 17.

Images