Battery device, upper cover and electric equipment

Abstract

The utility model discloses a battery device, an upper cover and electric equipment. The battery device comprises a battery box and a battery monomer, the battery box comprises a box body and an upper cover, and the upper cover and the box body are enclosed to form an accommodating cavity; the upper cover comprises a cover body and a cover flange arranged in a surrounding mode in the circumferential direction of the cover body, the corner area of the cover body is configured to be a first reinforcing part, other areas are configured to be non-reinforcing parts, the cover flange is configured to be a second reinforcing part, the thickness of the first reinforcing part and the thickness of the second reinforcing part are both larger than the thickness of the non-reinforcing parts, and a first installation part is arranged on the outer side face of the cover body. The first mounting part is configured to be connected with a beam body of electric equipment; the battery monomers are arranged in the accommodating cavities; according to the technical scheme, the torsion resistance of the upper cover is improved, so that the possibility that the upper cover deforms, cracks and loses efficacy under the torsion working condition of the electric equipment is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly relates to a battery device, an upper cover, and an electrical device. Background Art

[0002] The battery device in the related art generally includes a battery box and battery cells disposed in the battery box. The battery box includes a box body and an upper cover covering the box body.

[0003] During the use of the battery device loaded on an electrical device such as a vehicle, when the electrical device has a large torsional working condition, the torsional force will act on the battery device and cause the upper cover of the battery device to deform and crack and fail. Summary of the Utility Model

[0004] The main object of the present application is to provide a battery device, aiming to improve the anti-torsion ability of the upper cover, so as to reduce the possibility of the upper cover deforming, cracking, and failing under the torsional working condition of the electrical device.

[0005] To achieve the above object, the battery device proposed by the present application includes:

[0006] A battery box, the battery box includes a box body and an upper cover, the upper cover and the box body are enclosed to form a receiving cavity; the upper cover includes a cover body and a cover flange circumferentially arranged around the cover body. The corner area of the cover body is configured as a first strengthening part, and other areas are configured as non-strengthening parts. The cover flange is configured as a second strengthening part. The thicknesses of both the first strengthening part and the second strengthening part are greater than the thickness of the non-strengthening part. The outer side surface of the cover body is provided with a first mounting part, and the first mounting part is configured to be connected to the beam body of the electrical device; and

[0007] Battery cells, the battery cells are disposed in the receiving cavity.

[0008] After the battery device of the technical solution of the present application is heightened, by providing a first mounting part on the outer side surface of the upper cover to connect with the beam body of the electrical device, it can be ensured that the battery device can still be firmly installed on the beam body. Furthermore, while achieving the improvement of the power of the battery device to improve the energy density of the whole vehicle, the firmness of the installation of the battery device is improved to enhance the anti-torsion ability of the upper cover, and the possibility of the upper cover deforming, cracking, and failing under the torsional working condition of the electrical device is reduced. Further, by setting the corner area of the cover body of the upper cover of the battery device as the first strengthening part and the cover flange as the second strengthening part, the strength of the corner area of the upper cover and the strength of the connection between the upper cover and the box body can be increased. At this time, the overall structural strength of the upper cover is effectively improved, so that it has sufficient strength to meet the stability when the upper cover is connected to the beam body in the vehicle, so as to further improve the anti-torsion ability of the upper cover.

[0009] In some embodiments, the thickness of the first reinforcing portion is defined as H1, satisfying the relationship: 4 mm ≤ H1 ≤ 6 mm;

[0010] and / or, the thickness of the second reinforcing portion is defined as H2, satisfying the relationship: 3 mm ≤ H2 ≤ 6 mm;

[0011] and / or, the outer surface of the first reinforcing portion is flush with the outer surface of the non-reinforcing portion.

[0012] Thus, by setting the value of the thickness H1 of the first reinforcing portion to be greater than 4 mm and less than 6 mm, the structural strength of the corner area of the cover body can be more effectively improved, and at the same time, the difference in thickness between the first reinforcing portion and the non-reinforcing portion will not be too large to cause inconvenience in manufacturing; by setting the value of the thickness H2 of the second reinforcing portion to be greater than 3 mm and less than 6 mm, the structural strength of the cover flanging can be more effectively improved, and at the same time, the difference in thickness between the second reinforcing portion and the non-reinforcing portion will not be too large to cause inconvenience in manufacturing; by setting the outer surface of the first reinforcing portion to be flush with the outer surface of the non-reinforcing portion, the side circumferential surface of the cover body can be more consistent, with a more regular shape, facilitating the subsequent installation and arrangement of the battery device on the electrical equipment.

[0013] In some embodiments, the thickness of the first reinforcing portion is defined as H1, and the thickness of the non-reinforcing portion is defined as H3, satisfying the relationship: H1 ≥ 2H3.

[0014] Thus, by setting the value of the thickness H1 of the first reinforcing portion to be at least twice the value of the thickness H3 of the non-reinforcing portion, the structural strength of the corner area of the cover body can be more effectively improved.

[0015] In some embodiments, the cover body includes:

[0016] a cover top plate; and

[0017] at least three cover side plates, at least three cover side plates are circumferentially arranged around the cover top plate, a cover flange surrounds at least three cover side plates, and the connection between at least two adjacent cover side plates is configured as the first reinforcing portion.

[0018] Thus, in the case of enhancing the structural strength of the end of the cover side plate away from the cover body with the cover flange, the strength of each part of the cover side plate in the height direction of the battery device can be enhanced, which is conducive to improving the strengthening effect of the structural strength of the corner area.

[0019] In some embodiments, the first reinforcing portion includes:

[0020] a first sub-reinforcing portion, the first sub-reinforcing portion is located in the corner area of the cover top plate; and

[0021] The second sub-reinforcement portion is located at the connection between two adjacent cover side plates, and the second sub-reinforcement portion is extended along the height direction of the battery device and is connected to the first sub-reinforcement portion.

[0022] As a result, the connection strength between the top cover plate and the two adjacent side cover plates can be enhanced, which is beneficial to further improve the structural strength of the corner area.

[0023] In some embodiments, the first reinforcement sub-portion is provided with an outwardly convex arc segment, and two ends of the arc segment are respectively connected to two adjacent cover side plates;

[0024] and / or, the thickness of the first sub-reinforcement portion is equal to the thickness of the second sub-reinforcement portion;

[0025] And / or, one end of the second sub-reinforcement portion away from the first sub-reinforcement portion extends to a side of the cover side plate away from the cover top plate.

[0026] Therefore, the setting of the arc segment prevents the first sub-reinforcement portion from being easily damaged due to the formation of a sharp angle and stress concentration; setting the first sub-reinforcement portion and the second sub-reinforcement portion to have equal thickness is beneficial to improving the uniformity of reinforcement of the structural strength of various locations in the corner areas of the cover body, and at the same time, it can also make the structure of the upper cover more regular, which is beneficial to improving the convenience of its manufacturing; the second sub-reinforcement portion is vertically spanned across the upper and lower ends of the cover side plate, so that the height value of the second sub-reinforcement portion can be larger, which is beneficial to improving the effect of strengthening the strength of the corner areas of the cover body.

[0027] In some embodiments, the second reinforcement sub-portion includes a first portion and a second portion that are connected and arranged at an angle, and the first portion and the second portion are respectively located at two adjacent cover side plates;

[0028] The first part and the second part are both extended along the height direction of the battery device and connected to the first sub-reinforcement part.

[0029] Thus, the second sub-reinforcement portion can be distributed on two adjacent cover side plates, thereby facilitating further improving the structural strength reinforcement effect of the corner area of ​​the cover body.

[0030] In some embodiments, the projection length of the first portion in the first direction is equal to the projection length of the second portion in the second direction, and the first direction, the second direction, and the height direction of the battery device intersect each other;

[0031] and / or, in the height direction of the battery device, a projection length of the first portion and a projection length of the second portion are equal;

[0032] and / or, in the first direction, the projection length of the first portion is equal to the projection length of the first reinforcement sub-portion;

[0033] and / or, in the second direction, the projection lengths of the second part and the first sub-reinforcing part are equal;

[0034] and / or, the connection between the first part and the second part is set with a smooth transition;

[0035] and / or, the connection between the first sub-reinforcing part and the first part is set with a smooth transition;

[0036] and / or, the connection between the first sub-reinforcing part and the second part is set with a smooth transition.

[0037] Thus, setting the widths of the first part and the second part, and the heights of the first part and the second part to be equal is beneficial to improving the uniformity of strengthening the structural strength of the adjacent sides of the two cover side plates that are close to each other; setting the projection length of the first part in the first direction and the projection length of the first sub-reinforcing part in the first direction to be equal, and setting the projection length of the second part in the second direction and the projection length of the first sub-reinforcing part in the second direction to be equal is beneficial to improving the uniformity of strengthening the structural strength of various parts of the corner area of the cover body. At the same time, it can also make the structure of the upper cover more regular, which is conducive to improving the convenience of its manufacturing; and the setting of the smooth transition can prevent stress concentration and damage at this place due to the formation of sharp corners.

[0038] In some embodiments, a local part of the cover top plate is recessed outwardly and / or inwardly to form raised portions, and the number of raised portions is at least two;

[0039] Each raised portion extends along the second direction, and at least two raised portions are spaced along the first direction. The first direction, the second direction, and the height direction of the battery device intersect pairwise.

[0040] Thus, the setting of the raised portions can enhance the structural strength of the cover top plate and further improve the anti-torsion ability of the cover top plate.

[0041] In some embodiments, in the first direction, the projection length of the raised portion is greater than the projection length of the part of the cover top plate located between two adjacent raised portions;

[0042] and / or, in the first direction, the projection lengths of each raised portion are equal;

[0043] and / or, in the first direction, each raised portion is evenly spaced;

[0044] and / or, in the second direction, the opposite ends of the raised portion respectively extend to the opposite sides of the cover top plate;

[0045] And / or, each raised portion protrudes outwardly toward the outer side of the cover top plate;

[0046] And / or, the first direction is the length direction of the battery device, and the second direction is the width direction of the battery device.

[0047] Thus, by setting the width of the raised portion to be greater than the width of the portion of the cover top plate located between two adjacent raised portions, the area of the raised portion can be increased, which is beneficial to improving the effect of strengthening the strength of the cover top plate; by setting the widths of the respective raised portions to be equal and the respective raised portions to be evenly spaced in the first direction, the shape of the cover top plate can be made more regular, which is beneficial to improving the convenience of processing and forming it, and at the same time improving the uniformity of strengthening the strength of various parts of the cover top plate. By making the raised portion span across the opposite sides of the cover top plate, the length value of the raised portion can be made larger, which is beneficial to improving the effect of strengthening the strength of the cover top plate; by setting each raised portion to protrude outwardly toward the outer side of the cover top plate, the setting of the raised portion will not occupy the inner space of the upper cover, so as to ensure the size of the accommodation cavity formed by enclosing the upper cover and the box body. At the same time, at this time, the protruding directions of the respective raised portions are the same, which can also make the shape of the cover body more regular, so as to improve the convenience of processing and forming it, for example: manufacturing by integral stamping.

[0048] In some embodiments, the cover body is configured as the top surface of the battery box, and the box body is configured as the bottom surface of the battery box; in the height direction of the battery device, the distance between the top surface and the bottom surface is defined as D, and the distance between the first mounting portion and the bottom surface is defined as d, satisfying the relationship: d / D = 0.5 to 0.8;

[0049] And / or, the first mounting portion includes a connecting plate mounted on the outer side surface of the cover body, and a threaded hole is provided on the connecting plate, and the threaded hole is configured to be connected to the beam body of the electrical device through a threaded member.

[0050] Thus, by reasonably setting the relationship between d and D, the first mounting portion can have a certain height position, so as to improve the stability of mounting the battery device, and at the same time, the cover side plate can have sufficient space to arrange the first mounting portion.

[0051] This application also proposes an upper cover, including:

[0052] A cover body, the corner area of the cover body is configured as a first strengthening portion, and other areas are configured as non-strengthening portions. A first mounting portion is provided on the outer side surface of the cover body, and the first mounting portion is configured to be connected to the beam body of the electrical device; and

[0053] A cover flange, the cover flange is circumferentially arranged around the cover body, and the cover flange is configured as a second strengthening portion. The thicknesses of the first strengthening portion and the second strengthening portion are both greater than the thickness of the non-strengthening portion.

[0054] Thus, after the height of the battery device is increased, by providing a first mounting portion on the outer side surface of the upper cover for connecting with the beam body of the electrical device, it can be ensured that the battery device can still be firmly mounted on the beam body. Furthermore, while increasing the power of the battery device to improve the energy density of the whole vehicle, the firmness of the battery device installation is improved to enhance the anti-torsion ability of the upper cover, and the possibility of deformation and cracking failure of the upper cover under the torsion condition of the electrical device is reduced. Further, by setting the corner area of the cover body of the upper cover of the battery device as the first strengthening portion and the cover flange as the second strengthening portion, the strength of the corner area of the upper cover and the strength of the connection between the upper cover and the box body can be increased. At this time, the overall structural strength of the upper cover is effectively improved, enabling it to have sufficient strength to meet the stability during the connection between the upper cover and the beam body in the vehicle, so as to further enhance the anti-torsion ability of the upper cover.

[0055] In some embodiments, define the thickness of the first strengthening portion as H1, satisfying the relationship: H1≥4㎜;

[0056] And / or, define the thickness of the second strengthening portion as H2, satisfying the relationship: H2≥3㎜.

[0057] Thus, setting the value of the thickness H1 of the first strengthening portion to be greater than 4㎜ can more effectively improve the structural strength of the corner area of the cover body; setting the value of the thickness H2 of the second strengthening portion to be greater than 3㎜ can more effectively improve the structural strength at the cover flange.

[0058] In some embodiments, the cover body includes:

[0059] A cover top plate; and

[0060] At least three cover side plates, which are arranged around the circumference of the cover top plate, the cover flange surrounds the at least three cover side plates, and the connection between at least two adjacent cover side plates is configured as the first strengthening portion.

[0061] Thus, when enhancing the structural strength of the end of the cover side plate away from the cover body with the cooperation of the cover flange, the strength of each part of the cover side plate in the height direction of the battery device can be enhanced, which is conducive to improving the strengthening effect on the structural strength of the corner area.

[0062] In some embodiments, the first strengthening portion includes a first sub-strengthening portion and a second sub-strengthening portion. The first sub-strengthening portion is located in the corner area of the cover top plate; the second sub-strengthening portion is located at the connection between two adjacent cover side plates and extends along the height direction of the battery device, and the second sub-strengthening portion is connected to the first sub-strengthening portion;

[0063] And / or, a part of the cover top plate is recessed outwardly and / or inwardly to form a raised portion, and the number of raised portions is at least two; each raised portion extends along the second direction, and at least two raised portions are spaced along the first direction, and the first direction, the second direction and the height direction of the battery device intersect pairwise.

[0064] Thus, through the arrangement of the first sub-strengthening portion and the second sub-strengthening portion, the connection strength between any two of the cover top plate and the two adjacent cover side plates can be enhanced, which is beneficial to further improving the strengthening effect on the structural strength of the corner area; and through the arrangement of the raised portion, the cover top plate can enhance the structural strength, so as to further improve the anti-torsion ability of the cover top plate.

[0065] The present application also provides an electrical equipment, including the above battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0067] Figure 1 It is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0068] Figure 2 It is an exploded structural diagram of a battery device according to some embodiments of the present application;

[0069] Figure 3 It is an exploded structural diagram of a battery cell according to some embodiments of the present application;

[0070] Figure 4 It is a schematic structural diagram of an upper cover according to some embodiments of the present application;

[0071] Figure 5 For Figure 4 a partial structural diagram of the upper cover;

[0072] Figure 6 For Figure 4 another perspective schematic diagram of the upper cover;

[0073] Figure 7 For Figure 6 a partial enlarged schematic diagram at A in;

[0074] Figure 8 For Figure 6 another perspective schematic diagram of the upper cover;

[0075] Figure 9 is Figure 8 a schematic cross-sectional view taken along line E-E in

[0076] Figure 10 is Figure 9 a partially enlarged schematic view at position B in

[0077] Figure 11 is Figure 6 a schematic view of another perspective of the upper cover in

[0078] Figure 12 is Figure 11 a schematic cross-sectional view taken along line F-F in

[0079] Figure 13 is Figure 12 a partially enlarged schematic view at position C in

[0080] Figure 14 a schematic assembly view of the battery device and the beam body according to some embodiments of the present application;

[0081] Figure 15 is Figure 14 a schematic structural view of the first mounting portion of the battery device in

[0082] Figure 16 a schematic structural view of the battery device according to some embodiments of the present application.

[0083] Explanation of the reference numerals in the drawings:

[0084] 1000, vehicle; 100, battery device; 1, battery box; 11, upper cover; 111, cover body; 111a, first strengthening portion; 111b, first sub-strengthening portion; 111c, arc segment; 111d, linear segment; 111e, second sub-strengthening portion; 111f, first part; 111g, second part; 111h, non-strengthening portion; 1111, cover top plate; 1112, raised portion; 1113, cover side plate; 1114, first mounting portion; 1115, connecting plate; 1116, threaded hole; 1117, top surface; 113, cover flange; 113a, second strengthening portion; 113b, mounting hole; 12, box body; 121, bottom surface; 123, second mounting portion; 1a, accommodating cavity; 2, battery pack; 20, battery cell; 21, end cap; 21a, electrode terminal; 22, housing; 23, electrode assembly; 231, tab; 200, controller; 300, motor; 400, beam body; 410, main beam; 411, top end; 413, bottom end; 430, cross beam.

[0085] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0086] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0087] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0088] In the present application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0089] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0090] A battery, that is, a device for storing electrical energy, is not only widely used in energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as other fields.

[0091] Among them, the battery device may include a battery box and battery cells disposed within the battery box. The battery box may include a box body and an upper cover covering the box body to enclose a receiving cavity for receiving the battery cells. The battery cell is the smallest unit that makes up a battery and generally includes a battery housing and an electrode assembly disposed within the battery housing. The electrode assembly is the component in the battery cell where the electrochemical reaction actually occurs and may include a positive electrode plate, a negative electrode plate, and a separator located therebetween, and the positive electrode plate, the negative electrode plate, and the separator are formed by winding or laminating. In addition, at least two battery cells within the battery box may be connected in series, in parallel, or in a series-parallel connection including series and parallel connections.

[0092] Further, the battery device is used for installation on an electrical device. Taking the electrical device as a vehicle as an example, for the reasonable weight balance and safety requirements of the vehicle, the battery device is generally disposed at the bottom of the vehicle. To reduce the risk of collision between the battery device and the protrusions on the ground during vehicle driving, there are strict requirements and limitations on the ground clearance of the battery device, which also limits the volume of the battery device. Since the energy supply of the battery device is mainly determined by the battery cells in the internal space, in the case where the energy supply of a single battery cell cannot be greatly improved in a short time, how to maximize the use of the space of the vehicle to increase the volume of the battery device and install more battery cells is the goal that those skilled in the art have been pursuing.

[0093] In the structure of the vehicle, the beam of the vehicle includes a main beam and a cross beam. The two ends of the cross beam are respectively connected to the main beam to strengthen the main beam. Generally, the two ends of the cross beam are connected to the middle position of the main beam in the height direction of the battery box, and the battery device is disposed below the cross beam. In this way, in the height direction, the bottom of the battery device is limited by the ground clearance and cannot be made too low, and the top is limited by the interference of the cross beam and cannot be made too high, resulting in the volume of the battery device being limited and it being difficult to improve the overall vehicle energy density.

[0094] It has been found through research that after some vehicles are installed, there is still some surplus space at the top of the main beam, and there is also a certain distance between the cross beam and the top of the main beam. However, due to the limitation of the cross beam setting, the interference between the battery device and the cross beam causes the battery device to be only disposed below the cross beam. In this regard, the applicant considered whether the cross beam can be made higher, that is, the cross beam is disposed higher than the top of the main beam, and the main beam and the cross beam are connected by setting additional connecting members, so that the battery device can be made higher, thereby increasing the volume of the battery device and then increasing the power. However, after attempting to make the battery device higher, the upper cover of the battery device needs to be set as a cover structure, which makes the center of gravity position of the battery device relatively high and prone to shaking. At this time, when there is a large torsional working condition in the electrical device, the torsional force will act on the upper cover, resulting in deformation and cracking failure of the upper cover.

[0095] Therefore, based on the above considerations, in order to solve the problem that in the related art, when the upper cover of the battery device is set as a cover structure to increase the height of the battery device in order to increase the power of the battery device, the upper cover is prone to deformation, cracking and failure under the torsional working condition, the present application proposes an upper cover. By respectively setting the corner area and the flanging of the cover body as the first strengthening part and the second strengthening part, the overall structural strength of the upper cover can be enhanced, the possibility of its deformation can be reduced, and further the anti-torsion ability of the upper cover can be improved, so as to reduce the possibility of deformation, cracking and failure of the upper cover under the torsional working condition of the electrical equipment.

[0096] In addition, it should be noted that the upper cover proposed in the present application can be applied to a battery device, and the battery device can be an electrical equipment that serves as a power source. Among them, the electrical equipment can be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Further, the electric toy can include fixed or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys, electric aircraft toys, etc., and the spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.

[0097] For the convenience of description, the following embodiments will be described by taking a vehicle as an example of an electrical equipment in an embodiment of the present application.

[0098] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application. 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 disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 may further 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, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0099] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0100] Please refer to Figure 2 and Figure 3 , Figure 2Explosion diagram of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes battery cells 20. In the battery device 100, there may be at least two battery cells 20, and at least two battery cells 20 can be connected in series, parallel or in a mixed connection to form a battery pack 2. The mixed connection means that there are both series and parallel connections among multiple battery cells 20. The battery device 100 may further include a battery box 1, and the battery box 1 is used to provide an accommodation space for the battery cells 20, and the battery box 1 can adopt various structures. In some embodiments, the battery box 1 may include an upper cover 11 and a box body 12 that cover each other to jointly define an accommodation cavity 1a for accommodating the battery cells 20. The upper cover 11 and the box body 12 may both be hollow structures with one side open, and the open side of the upper cover 11 covers the open side of the box body 12. Of course, the battery box 1 formed by the upper cover 11 and the box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0101] The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component for realizing electrical connection among multiple battery cells 20.

[0102] Among them, each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc.

[0103] Please refer to Figure 2 and Figure 3 , Figure 3 Schematic exploded view of the battery cell 20 provided by some embodiments of the present application. The battery cell 20 refers to the smallest unit that makes up the battery device 100. As Figure 3 shown, the battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23 and other functional components.

[0104] The end cap 21 refers to a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy). In this way, the end cap 21 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminals 21a can be used for electrical connection with the electrode assembly 23 to output or input the electrical energy of the battery cell 20. In some embodiments, a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold can also be provided on the end cap 21. The material of the end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this. In some embodiments, an insulating member can also be provided on the inner side of the end cap 21, and the insulating member can be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0105] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, the 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 is covered on the opening to form the internal environment of the battery cell 20. Without limitation, the end cap 21 and the housing 22 can also be integrated. Specifically, the end cap 21 and the housing 22 can first form a common connection surface before other components are inserted into the housing, and when it is necessary to encapsulate the inside of the housing 22, the end cap 21 is then covered on 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., and the embodiments of the present application do not make special restrictions on this.

[0106] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. The housing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive electrode sheet and the negative electrode sheet having active materials constitute the main body of the electrode assembly 23, and the portions of the positive electrode sheet and the negative electrode sheet without active materials respectively constitute the electrode tabs 231. The positive electrode tab and the negative electrode tab may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive active material and the negative active material react with the electrolyte, and the electrode tab 231 is connected to the electrode terminal 21a to form a current loop.

[0107] Next, the structure of the upper cover 11 proposed in this application will be explained by way of an embodiment:

[0108] Please refer to Figure 4 , Figure 6 and Figure 7 , in an embodiment of the present application, the upper cover 11 includes a cover body 111 and a cover flange 113 circumferentially disposed around the cover body 111. The corner area of the cover body 111 is configured as a first reinforcing portion 111a, and other areas are configured as non-reinforcing portions 111h. The cover flange 113 is configured as a second reinforcing portion 113a. The thicknesses of both the first reinforcing portion 111a and the second reinforcing portion 113a are greater than the thickness of the non-reinforcing portion 111h.

[0109] The cover body 111 can be a hollow structure with an open end at one side. For example, as introduced below, it can be a structure formed by enclosing a cover top plate 1111 and a cover side plate 1113 surrounding the cover top plate 1111, and is used to enclose with the box body 12 of the battery box 1 in the battery device 100 to form a containing cavity 1a for containing battery cells 20. Among them, when the battery device 100 is in a normal use state, on the projection plane perpendicular to the height direction of the battery device 100, the shape of the cover body 111 can be triangular, and of course it can also be quadrilateral, pentagonal, etc. The present application does not limit the shape of the cover body 111. It should be noted that the height direction of the battery device 100 is the direction parallel to the arrangement direction of the upper cover 11 and the box body 12. Usually, the upper cover 11 and the box body 12 are arranged in the up-down direction. Therefore, the height direction of the battery device 100 is usually also the up-down direction. Further, the corner area of the cover body 111 can refer to the connection part of the cover top plate 1111 and two adjacent cover side plates 1113, or the connection part of two adjacent cover side plates 1113. Therefore, the first strengthening part 111a formed at each corner area can be distributed on the cover top plate 1111 and two adjacent cover side plates 1113 at the same time, or distributed on the cover top plate 1111 and one cover side plate 1113 at the same time, or distributed on two adjacent cover side plates 1113 at the same time, or only distributed on the cover top plate 1111 alone, or only distributed on one cover side plate 1113 alone, as long as it can enhance the structural strength of the corner area of the cover body 111 to improve the overall structural strength of the upper cover 11. In addition, the number of corner areas of the cover body 111 can be set according to the number of cover side plates 1113. For example, when the number of cover side plates 1113 is three, the number of corner areas of the cover body 111 is three; when the number of cover side plates 1113 is four, the number of corner areas of the cover body 111 is four. In addition, the thickness of the first strengthening part 111a is greater than the thickness of the non-strengthening part 111h. That is to say, the thickness of the cover body 111 at the first strengthening part 111a is thickened compared with the thickness at the non-strengthened part. At this time, the corner area of the cover body 111 can protrude towards the inner side of the cover body 111 to thicken and form the first strengthening part 111a; of course, it can also protrude towards the outer side of the cover body 111 to thicken and form the first strengthening part 111a; or, it can protrude towards the inner side and the outer side of the cover body 111 at the same time to thicken and form the first strengthening part 111a.

[0110] The cover flange 113 can be provided at one end of the cover body 111 with an opening and is arranged circumferentially around the cover body 111 for abutting and connecting with the box flange of the box body 12. Among them, the cover flange 113 and the box flange can be connected by screws, so as to balance the stability and convenience of the connection between the upper cover 11 and the box body 12, and at the same time, it is also convenient to repair and replace objects such as the battery cell 20 accommodated in the accommodation cavity 1a formed by enclosing the upper cover 11 and the box body 12 in the future. Therefore, a plurality of mounting holes 113b can be provided at intervals along the circumference of the cover flange 113 for the screws to pass through. In addition, the cover flange 113 and the cover body 111 can be of an integral structure to further improve the structural strength of the upper cover 11. Among them, the integral structure proposed in this application refers to being prepared by an integral molding process, for example: stamping integral molding process, injection molding integral molding or casting integral molding process, so that the objects can be connected into one body after being manufactured. In addition, the thickness of the second reinforcing portion 113a is greater than the thickness of the non-reinforcing portion 111h. That is to say, the thickness of the cover flange 113 is thickened compared with the thickness of the non-reinforcing portion of the cover body 111. At this time, the cover flange 113 can be thickened toward the side away from the box flange, so as to increase the connection area between the cover flange 113 and the cover body 111 and greatly improve the connection strength between the two, which is further beneficial to improving the overall structural strength of the upper cover 11. In addition, the thickness of the second reinforcing portion 113a and the thickness of the first reinforcing portion 111a can be set to be equal, or of course, can also be set to be unequal.

[0111] In the technical solution of this application, by setting the corner area of the cover body 111 of the upper cover 11 of the battery device 100 as the first reinforcing portion 111a and the cover flange 113 as the second reinforcing portion 113a, the strength of the corner area of the upper cover 11 and the strength of the connection between the upper cover 11 and the box body 12 can be increased. At this time, the overall structural strength of the upper cover 11 is effectively improved, and then the anti-torsion ability of the upper cover 11 can be improved accordingly, and the possibility of deformation and cracking failure of the upper cover 11 under the torsion working condition of the electrical equipment can be reduced.

[0112] Please refer to Figures 6 to 13 , in an embodiment of this application, define the thickness of the first reinforcing portion 111a as H1, and satisfy the relationship: 4 mm ≤ H1 ≤ 6 mm.

[0113] In this embodiment, the value of the thickness H1 of the first reinforcing portion 111a is set to be greater than 4 mm and less than or equal to 6 mm, which can more effectively improve the structural strength of the corner area of the cover body 111, and at the same time, it will not cause too large a difference in the thickness between the first reinforcing portion 111a and the non-reinforcing portion 111h, resulting in inconvenience in manufacturing. Among them, the value of the thickness H1 of the first reinforcing portion 111a can be 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm or 6 mm. Of course, it can also be any value within the above range.

[0114] Please refer to Figure 9 and Figure 10 , in an embodiment of the present application, the thickness of the second reinforcing portion 113a is defined as H2, satisfying the relationship: 3 ≤ H2 ≤ 6 mm.

[0115] In this embodiment, the value of the thickness H2 of the first reinforcing portion 111a is set to be greater than 3 mm, which can more effectively improve the structural strength of the cover flange 113, and at the same time, it will not cause too large a difference in the thickness between the second reinforcing portion 113a and the non-reinforcing portion 111h, resulting in inconvenience in manufacturing. Among them, the value of the thickness H2 of the second reinforcing portion 113a can be 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm or 6 mm. Of course, it can also be any value within the above range.

[0116] Please refer to Figures 8 to 13 , in an embodiment of the present application, the thickness of the first reinforcing portion 111a is defined as H1, and the thickness of the non-reinforcing portion 111h is defined as H3, satisfying the relationship: H1 ≥ 2H3.

[0117] In this embodiment, the value of the thickness H1 of the first reinforcing portion 111a is set to be at least twice the value of the thickness H3 of the non-reinforcing portion 111h, which can more effectively improve the structural strength of the corner area of the cover body 111.

[0118] Please refer to Figure 5 and Figure 6 , in an embodiment of the present application, the outer surface of the first reinforcing portion 111a is flush with the outer surface of the non-reinforcing portion 111h.

[0119] In this embodiment, the outer surface of the first reinforcing portion 111a is set to be flush with the outer surface of the non-reinforcing portion 111h. That is, as introduced above, the cover body 111 bulges toward the inner side of the cover body 111 in the corner area to thicken and form the first reinforcing portion 111a. At this time, the side peripheral surface of the cover body 111 can be relatively consistent, making the shape of the cover body 111 more regular, and thus facilitating the subsequent installation and arrangement of the battery device 100 on the electrical device.

[0120] Please refer to Figure 6 and Figure 7 , in an embodiment of the present application, the cover body 111 includes a cover top plate 1111 and at least three cover side plates 1113; the at least three cover side plates 1113 are arranged around the circumference of the cover top plate 1111, the cover flange 113 surrounds the at least three cover side plates 1113, and the connection portion of at least two adjacent cover side plates 1113 is configured as the first reinforcing portion 111a.

[0121] The cover top plate 1111 can be arranged at a relatively spaced interval from the box body 12. Among them, the cover top plate 1111 can be a flat plate structure, and of course, it can also be an arc-shaped plate structure. The present application does not limit the structural type of the cover top plate 1111. The at least three cover side plates 1113 can be connected to the cover top plate 1111 at the upper end and arranged around the circumference of the cover top plate 1111; the lower end can enclose the opening of the cover body 111 and be connected to the cover flange 113. Among them, the cover side plate 1113 can be a flat plate structure, and of course, it can also be an arc-shaped plate structure. The present application does not limit the structural type of the cover side plate 1113 either. Moreover, the cover side plate 1113 and the cover top plate 1111 can be integrally structured. In addition, the connection portion of at least two adjacent cover side plates 1113 is configured as the first reinforcing portion 111a, that is, as introduced above, the first reinforcing portion 111a can be distributed on both of the two adjacent cover side plates 1113 at the same time, or can be distributed only on one side of a cover side plate 1113 close to the adjacent cover side plate 1113, or can be distributed on the cover top plate 1111 and the two adjacent cover side plates 1113 at the same time.

[0122] In this embodiment, setting the first reinforcing portion 111a at least at the connection portion of at least two adjacent cover side plates 1113 can enhance the structural strength of the connection portion of at least two adjacent cover side plates 1113. In this way, when the cover flange 113 enhances the structural strength of the end of the cover side plate 1113 away from the cover body 111, it is possible to enhance the strength of each part of the cover side plate 1113 in the height direction of the battery device 100, and thus is beneficial to improving the strengthening effect on the structural strength of the corner area.

[0123] Please refer to Figure 6 and Figure 7, in an embodiment of the present application, the first strengthening portion 111a includes a first sub-strengthening portion 111b and a second sub-strengthening portion 111e. The first sub-strengthening portion 111b is located at the corner area of the cover top plate 1111; the second sub-strengthening portion 111e is located at the connection of two adjacent cover side plates 1113. The second sub-strengthening portion 111e extends along the height direction of the battery device 100 and is connected to the first sub-strengthening portion 111b.

[0124] The first sub-strengthening portion 111b can be formed by thickening the cover top plate 1111. Among them, on the projection plane perpendicular to the height direction of the battery device 100, the first sub-strengthening portion 111b can be triangular, quadrilateral, fan-shaped or approximately fan-shaped (that is, on the basis of including the arc segment 111c introduced below, the arc segment 111c further includes linear segments 111d at both ends), etc. The present application does not limit the shape of the first sub-strengthening portion 111b. The second sub-strengthening portion 111e can be formed by thickening at least one of the two adjacent cover side plates 1113. Among them, in the height direction of the battery device 100, the second sub-strengthening portion 111e can extend to the opposite sides of the cover side plate 1113. Of course, the second sub-strengthening portion 111e can also be such that one end extends to the side of the cover side plate 1113 close to the cover top plate 1111, and the other end does not extend to the side of the cover side plate 1113 close to the cover flange 113.

[0125] In this embodiment, the first strengthening portion 111a is provided to include the first sub-strengthening portion 111b located on the cover top plate 1111 and the second sub-strengthening portion 111e located on the cover side plate 1113, so that the connection strength between every two of the cover top plate 1111 and the two adjacent cover side plates 1113 can be enhanced, which is conducive to further improving the strengthening effect on the structural strength of the corner area.

[0126] Please refer to Figure 6 and Figure 7 , in an embodiment of the present application, the first sub-strengthening portion 111b is provided with a convex arc segment 111c, and both ends of the arc segment 111c are respectively connected to two adjacent cover side plates 1113.

[0127] In this embodiment, on the side opposite to the included angle formed by enclosing the first sub-strengthening portion 111b and two cover side plates 1113 adjacent to the first sub-strengthening portion 111b, an outwardly convex arc segment 111c is provided, so that the first sub-strengthening portion 111b will not be easily damaged due to stress concentration caused by forming a sharp angle at this location. At the same time, when the first sub-strengthening portion 111b is thickened by protruding inward from the corner area of the cover top plate 1111 as described above, the possibility of scratching the surface of the battery cell 20 located in the battery box 1 can also be reduced. In addition, it should be noted that the first sub-strengthening portion 111b can be directly connected to two adjacent cover side plates 1113 respectively through both ends of the arc segment 111c; of course, it is also possible that the first sub-strengthening portion 111b is further provided with linear segments 111d at the divided ends of the arc segment 111c, so as to realize that both ends of the arc segment 111c are indirectly connected to two adjacent cover side plates 1113 through the two linear segments 111d.

[0128] In an embodiment of the present application, the thickness of the first sub-strengthening portion 111b is equal to the thickness of the second sub-strengthening portion 111e.

[0129] In this embodiment, setting the first sub-strengthening portion 111b and the second sub-strengthening portion 111e to have equal thickness is beneficial to improving the uniformity of strengthening the structural strength of each part of the corner area of the cover body 111; at the same time, it can also make the structure of the upper cover 11 more regular, which is beneficial to improving the manufacturing convenience. Of course, the present application is not limited to this. In other embodiments, it is also possible to set the thickness of the first sub-strengthening portion 111b and the thickness of the second sub-strengthening portion 111e to be different.

[0130] Please refer to Figure 6 and Figure 7 , in an embodiment of the present application, one end of the second sub-strengthening portion 111e far from the first sub-strengthening portion 111b extends to the side of the cover side plate 1113 far from the cover top plate 1111.

[0131] Extending to the side of the cover side plate 1113 far from the cover top plate 1111 means that in the height direction, the second sub-strengthening portion 111e can cover the entire cover side plate 1113.

[0132] In this embodiment, making the second sub-strengthening portion 111e straddle the upper end and the lower end of the cover side plate 1113 can make the height value of the second sub-strengthening portion 111e relatively large, which is beneficial to improving the effect of strengthening the strength of the corner area of the cover body 111.

[0133] Please refer to Figure 6 and Figure 7, in an embodiment of the present application, the second sub-strengthening portion 111e includes a first portion 111f and a second portion 111g that are connected and arranged at an angle, and the first portion 111f and the second portion 111g are respectively located on two adjacent cover side plates 1113; the first portion 111f and the second portion 111g both extend along the height direction of the battery device 100 and are connected to the first sub-strengthening portion 111b.

[0134] In this embodiment, the second sub-strengthening portion 111e is further arranged to include a first portion 111f and a second portion 111g, so that the second sub-strengthening portion 111e can be distributed on two adjacent cover side plates 1113, which is beneficial to further improving the strengthening effect on the structural strength of the corner area of the cover body 111. Of course, the present application is not limited to this. In other embodiments, the second sub-strengthening portion 111e may also only include the first portion 111f or the second portion 111g.

[0135] Please refer to Figures 11 to 13 , in an embodiment of the present application, the projection length of the first portion 111f in the first direction is equal to the projection length of the second portion 111g in the second direction, and the first direction, the second direction, and the height direction of the battery device 100 intersect pairwise.

[0136] The first direction and the second direction may be two horizontal directions. For example, when the battery device 100 is in the shape of a cuboid, the first direction may be the length direction of the battery device 100 as introduced below, and the second direction may be the width direction of the battery device 100. Therefore, the projection length of the first portion 111f in the first direction can also be said to be the width of the first portion 111f. The projection length of the second portion 111g in the second direction can also be said to be the width of the second portion 111g.

[0137] In this embodiment, setting the width of the first portion 111f equal to the width of the second portion 111g is beneficial to improving the uniformity of strengthening the structural strength of the adjacent sides of the two adjacent cover side plates 1113.

[0138] To achieve the same effect, in an embodiment of the present application, the projection length of the first portion 111f in the height direction may also be set equal to the projection length of the second portion 111g in the height direction. Of course, the present application is not limited to this. In other embodiments, it is also possible to set the width of the first portion 111f not equal to the width of the second portion 111g, and it is also possible to set the height of the first portion 111f not equal to the height of the second portion 111g.

[0139] Please refer to Figures 11 to 13, in an embodiment of the present application, in the first direction, the projection length of the first part 111f is equal to the projection length of the first sub-strengthening part 111b.

[0140] In this embodiment, setting the projection length of the first part 111f in the first direction to be equal to the projection length of the first sub-strengthening part 111b in the first direction is conducive to improving the uniformity of strengthening the structural strength of each part of the corner area of the cover body 111; at the same time, it can also make the structure of the upper cover 11 more regular, which is conducive to improving the convenience of its manufacturing.

[0141] To achieve the same effect, in an embodiment of the present application, in the second direction, the projection length of the second part 111g is equal to the projection length of the first sub-strengthening part 111b.

[0142] Please refer to Figure 6 and Figure 7 , in an embodiment of the present application, the connection part between the first part 111f and the second part 111g is provided with a smooth transition.

[0143] The smooth transition setting means that the connection part between the adjacent two is chamfered.

[0144] In this embodiment, setting the connection part between the first part 111f and the second part 111g with a smooth transition can prevent this part from being easily damaged due to stress concentration caused by the formation of sharp corners. At the same time, it can also facilitate the processing and forming of the connection part between the first part 111f and the second part 111g.

[0145] To achieve the same effect, in an embodiment of the present application, the connection part between the first sub-strengthening part 111b and the first part 111f can also be provided with a smooth transition. And in an embodiment of the present application, the connection part between the first sub-strengthening part 111b and the second part 111g can also be provided with a smooth transition.

[0146] Please refer to Figures 4 to 6 , in an embodiment of the present application, a part of the cover top plate 1111 is recessed outwardly and / or inwardly to form a raised part 1112, and the number of the raised parts 1112 is at least two; each raised part 1112 extends along the second direction, and at least two raised parts 1112 are arranged at intervals along the first direction.

[0147] The raised portion 1112 can be formed by the local depression of the cover top plate 1111 towards the outside. At this time, the raised portion 1112 protrudes towards the outside of the cover top plate 1111. Of course, the raised portion 1112 can also be formed by the local depression of the cover top plate 1111 towards the inside. At this time, the raised portion 1112 protrudes towards the inside of the cover top plate 1111. Or, part of the raised portion 1112 is formed by the local depression of the cover top plate 1111 towards the outside, and the other part of the raised portion 1112 is formed by the local depression of the cover top plate 1111 towards the inside.

[0148] In this embodiment, at least two raised portions 1112 are provided on the cover top plate 1111, which can make the cover top plate 1111 form a "concave-convex" structure in the first direction, and the "concave-convex" structure extends in the second direction. The first direction can be the stress direction under the torsional condition, so that the extension direction of the "concave-convex" structure is perpendicular to the stress direction under the torsional condition, which can enhance the structural strength of the cover top plate 1111 and further improve the anti-torsion ability of the cover top plate 1111.

[0149] Please refer to Figure 4 and Figure 5 , in an embodiment of the present application, in the first direction, the projected length of the raised portion 1112 is greater than the projected length of the part of the cover top plate 1111 located between two adjacent raised portions 1112.

[0150] The projected length of the raised portion 1112 in the first direction can also be said to be the width of the raised portion 1112. And the projected length of the part of the cover top plate 1111 located between two adjacent raised portions 1112 in the first direction can also be said to be the width of the part of the cover top plate 1111 located between two adjacent raised portions 1112.

[0151] In this embodiment, setting the width of the raised portion 1112 to be greater than the width of the part of the cover top plate 1111 located between two adjacent raised portions 1112 can increase the area of the raised portion 1112, which is beneficial to improving the effect of strengthening the strength of the cover top plate 1111. Of course, the present application is not limited to this. In other embodiments, the width of the raised portion 1112 and the width of the part of the cover top plate 1111 located between two adjacent raised portions 1112 can also be set to be the same, or the width of the raised portion 1112 can be set to be less than the width of the part of the cover top plate 1111 located between two adjacent raised portions 1112.

[0152] Please refer to Figure 4 , in an embodiment of the present application, in the first direction, the projected lengths of the respective raised portions 1112 are equal.

[0153] In this embodiment, by setting the widths of the respective raised portions 1112 to be equal, the shape of the cover top plate 1111 can be made more regular, which is conducive to improving the convenience of processing and forming it, and at the same time improving the uniformity of strengthening the strength of various parts of the cover top plate 1111.

[0154] To achieve the same effect, in an embodiment of the present application, in the first direction, the respective raised portions 1112 may be evenly spaced. Of course, it should be noted that the present application is not limited thereto. In other embodiments, in the first direction, the projected lengths of the respective raised portions 1112 may also be set to be unequal, or only partially equal. And in the first direction, the intervals between the respective raised portions 1112 may also be set to be unequal, or only partially equal.

[0155] Please refer to Figure 2 , in an embodiment of the present application, in the second direction, the opposite ends of the raised portion 1112 respectively extend to the opposite sides of the cover top plate 1111.

[0156] Extending to the opposite sides of the cover top plate 1111 means that in the second direction, the raised portion 1112 can cover the entire cover top plate 1111.

[0157] In this embodiment, by making the raised portion 1112 span across the opposite sides of the cover top plate 1111, the length value of the raised portion 1112 can be made larger, which is conducive to improving the effect of strengthening the strength of the cover top plate 1111. Of course, the present application is not limited thereto. In other embodiments, in the second direction, the opposite ends of the raised portion 1112 may also form an interval with the opposite sides of the cover top plate 1111, or only one end may extend to the corresponding side of the cover top plate 1111.

[0158] Please refer to Figures 4 to 6 , in an embodiment of the present application, each of the raised portions 1112 protrudes outwardly toward the outside of the cover top plate 1111.

[0159] In this embodiment, by making each of the raised portions 1112 protrude outwardly toward the outside of the cover top plate 1111, the arrangement of the raised portions 1112 will not occupy the inner space of the upper cover 11, so as to ensure the space size of the accommodation cavity 1a formed by enclosing the upper cover 11 and the box body 12. At the same time, at this time, the protruding directions of each of the raised portions 1112 are the same, which can also make the shape of the cover body 111 more regular, so as to improve the convenience of processing and forming it. For example, it can be manufactured by integral stamping.

[0160] Please refer to Figure 2 and Figure 4 , in an embodiment of the present application, the first direction is the length direction of the battery device 100, and the second direction is the width direction of the battery device 100.

[0161] In this embodiment, the first direction is set to be consistent with the length direction of the battery device 100, and the second direction is set to be consistent with the width direction of the battery device 100, which can facilitate the adaptable installation of the battery device 100 onto electrical devices such as the vehicle 1000. At the same time, it can also make the extending direction of each raised portion 1112 perpendicular to the stress direction under the torsional condition, which can enhance the structural strength of the cover top plate 1111 and further improve the anti-torsion ability of the cover top plate 1111.

[0162] Please refer to Figures 14 to 16 , in an embodiment of the present application, a first mounting portion 1114 is provided on the outer side surface of the cover body 111, and the first mounting portion 1114 is configured to be connected to the beam body 400 of the electrical device.

[0163] The outer side surface of the cover body 111 is the outer surface of the cover side plate 1113. The first mounting portion 1114 can be used to connect to the beam body 400 of the electrical device. For example, taking the electrical device as a vehicle. The vehicle 1000 includes a beam body 400 and a battery device 100. The beam body 400 includes a cross beam 430 and two main beams 410 arranged in parallel. The two ends of the cross beam 430 are respectively connected to the two main beams 410. Generally, the top of the main beam 410 is set higher than the cross beam 430, and the battery device 100 is arranged below the cross beam 430. In this way, the battery device 100 is restricted by the obstruction of the cross beam 430 and cannot be made too high, otherwise it will interfere with the cross beam 430. Generally, the main beam 410 has an opposite top end 411 and bottom end 413 in the height direction of the battery device 100, and the top surface 1117 of the battery box 1 of the battery device 100 is lower than the top end 411 of the main beam 410. In the vehicle 1000 structure where the battery device 100 of the present application is applied, the cross beam 430 is arranged flush with the top end 411 of the main beam 410, or the cross beam 430 is arranged higher than the main beam 410. Therefore, the battery device 100 can be set higher. In a specific embodiment, the top surface 1117 of the battery box 1 of the battery device 100 can be set higher than the top end 411 of the main beam 410. In this way, the volume of the battery device 100 can be set larger, and thus more battery cells 20 can be accommodated, the capacitance of the battery device 100 can be increased, and the energy density of the whole vehicle can be further increased. This embodiment is particularly applicable to the application scenario where there is sufficient space above the main beam 410.

[0164] According to the conventional method of installing the battery device 100, a locking structure is provided on the outer side surface of the battery box 1. The locking structure is generally provided near the bottom surface 121, that is, on the box body 12, which facilitates installation. However, after installation, the battery device 100 is also prone to shaking, resulting in a large torque as introduced above. Therefore, since the height of the battery device 100 is set higher compared to the conventional technology, the center of gravity position becomes higher. If the installation point of the battery device 100 is set near the bottom surface 121 according to the conventional technical means, the battery device 100 is likely to shake. For this reason, in the embodiments of the present application, the locking structure of the battery device 100 is designed to be higher, that is, the first installation portion 1114 is arranged on the outer side of the cover side plate 1113 of the upper cover 11, so as to ensure that the battery device 100 can still be firmly installed on the beam body 400 when the height of the battery device 100 increases. Furthermore, it is possible to increase the power of the battery device 100 to improve the energy density of the whole vehicle while enhancing the firmness of the installation of the battery device 100.

[0165] In addition, especially when the first installation portion 1114 is provided on the upper cover 11, combined with the first strengthening portion 111a and the second strengthening portion 113a provided on the upper cover 11 as introduced above, the overall strength of the upper cover 11 can be further improved, so that the upper cover 11 has sufficient strength to meet the stability during the connection between the upper cover 11 and the beam body 400 in the vehicle 1000.

[0166] In addition, it should be noted that the first installation portion 1114 and the cover side plate 1113 of the upper cover 11 can be integrally structured, or can be separately structured, and then connected by any means such as snap connection or screw connection. Moreover, the first installation portion 1114 can be a plate structure, or can be a block structure. The present application does not limit the structural type and shape of the first installation portion 1114. In addition, in order to improve the connection stability, the first installation portion 1114 can be provided on both sides in the second direction of the upper cover 11, and either side in the second direction of the upper cover 11 can be provided with one first installation portion 1114, or can be provided with at least two first installation portions 1114, and the at least two first installation portions 1114 can be arranged along the first direction.

[0167] Please refer to Figure 16 , in an embodiment of the present application, the cover body 111 is configured with the top surface 1117 of the battery box 1, and the box body 12 is configured with the bottom surface 121 of the battery box 1; in the height direction of the battery device 100, the distance between the top surface 1117 and the bottom surface 121 is defined as D, and the distance between the first installation portion 1114 and the bottom surface 121 is defined as d, satisfying the relationship: d / D = 0.5 - 0.8.

[0168] In this embodiment, the distance d between the first mounting portion 1114 and the bottom surface 121 cannot be designed too large. If it is designed too large, there will not be enough space on the outer side surface of the cover side plate 1113 to arrange the first mounting portion 1114. Therefore, setting the relationship between d and D as d / D = 0.5 - 0.8 can enable the first mounting portion 1114 to have a relatively high position, so that a battery device 100 with a higher height can be firmly installed, facilitating the installation of a battery device 100 with a larger power capacity, and thus conducive to improving the installation reliability of the battery device 100 and the vehicle energy density. At the same time, it can also enable the cover side plate 1113 to have enough space to arrange the first mounting portion 1114.

[0169] In an embodiment of the present application, along the height direction, the height of the distance between the top surface 1117 and the bottom surface 121 is 490 mm, and the distance from the first mounting portion 1114 to the bottom surface 121 is 245 mm - 392 mm.

[0170] This embodiment gives a specific example for illustration. The actual height between the top surface 1117 and the bottom surface 121 is also the height of the battery device 100. When the height between the top surface 1117 and the bottom surface 121 is 490 mm, the minimum distance from the first mounting portion 1114 to the bottom surface 121 is 245 mm, and the maximum is 392 mm. Of course, as described above, the distance from the first mounting portion 1114 to the bottom surface 121 refers to the distance from the side of the first mounting portion 1114 closest to the bottom surface 121, that is, the lowest position, to the bottom surface 121. This distance cannot be designed too large. If it is designed too large, there will not be enough space on the side surface of the box body 12 to arrange the first mounting portion 1114.

[0171] In this embodiment, by setting the distance of the first mounting portion 1114 within a suitable range, both the stability of the connection of the battery device 100 on the vehicle 1000 can be improved, and enough installation positions can be reserved for the first mounting portion 1114.

[0172] Please refer to Figure 14 and Figure 15 , in an embodiment of the present application, the first mounting portion 1114 includes a connecting plate 1115 mounted on the outer side surface of the cover body 111. Threaded holes 1116 are provided on the connecting plate 1115, and the threaded holes 1116 are configured to be connected to the beam body 400 of the electrical equipment through threaded members.

[0173] Regarding the implementation manner of the first mounting portion 1114, the present application does not make specific limitations, as long as it can satisfy the connection with the main beam 410 of the beam body 400. As a specific embodiment of the first mounting portion 1114, the first mounting portion 1114 may include a connecting plate 1115, the connecting plate 1115 is mounted on the outer side surface of the cover side plate 1113, threaded holes 1116 are provided on the connecting plate 1115, holes are provided at corresponding positions on the main beam 410, and the battery device 100 is mounted on the main beam 410 by a threaded member passing through the holes and the threaded holes 1116. Here, the number of the threaded holes 1116 may also be multiple, and the multiple threaded holes 1116 may be arranged along the height direction, may be arranged along the length direction, or a part may be arranged along the height direction and the other part may be arranged along the length direction, and the corresponding threaded members are the same in number as the threaded holes 1116 and are connected in one-to-one correspondence.

[0174] In this embodiment, by providing that the first mounting portion 1114 includes a connecting plate 1115, and threaded holes 1116 are provided on the connecting plate 1115 for connecting with the main beam 410 through threaded members, in a detachable connection manner, both installation and maintenance are relatively convenient.

[0175] Please refer to Figure 16 , in an embodiment of the present application, a second mounting portion 123 may be provided on the outer side surface of the box body 12 for connecting with the main beam 410 of the beam body 400 to further improve the installation stability of the battery device 100. Among them, the second mounting portion 123 may be provided directly below the first mounting portion 1114, or may be provided obliquely below the first mounting portion 1114. In addition, the structural type of the second mounting portion 123 and the connection manner with the main beam 410 of the beam body 400 may be set to be the same as the structural type of the first mounting portion 1114 and the connection manner with the main beam 410 of the beam body 400. For example: both the first mounting portion 1114 and the second mounting portion 123 are plate body structures and are connected with the main beam 410 through threaded members. Of course, in an embodiment, the structural types of the first mounting portion 1114 and the second mounting portion 123 may also be set to be different, and the connection manners with the main beam 410 may also be set to be different.

[0176] Please refer to in combination Figures 4 to 16, in an embodiment of the present application, the upper cover 11 includes a cover body 111 and a cover flange 113 circumferentially arranged around the cover body 111. The corner area of the cover body 111 is configured as a first strengthening part 111a, and other areas are configured as non-strengthening parts 111h. The cover flange 113 is configured as a second strengthening part 113a. The thicknesses of both the first strengthening part 111a and the second strengthening part 113a are greater than the thickness of the non-strengthening part 111h. Define the thickness of the first strengthening part 111a as H1, and it satisfies the relationship: 4 mm ≤ H1 ≤ 6 mm. Define the thickness of the second strengthening part 113a as H2, and it satisfies the relationship: 3 mm ≤ H2 ≤ 6 mm. The outer surface of the first strengthening part 111a is flush with the outer surface of the non-strengthening part 111h. The cover body 111 includes a cover top plate 1111 and at least three cover side plates 1113. The at least three cover side plates 1113 are circumferentially arranged around the cover top plate 1111. The cover flange 113 surrounds the at least three cover side plates 1113. The connection part of at least two adjacent cover side plates 1113 is configured as the first strengthening part 111a. The first strengthening part 111a includes a first sub-strengthening part 111b and a second sub-strengthening part 111e. The first sub-strengthening part 111b is located in the corner area of the cover top plate 1111. The second sub-strengthening part 111e is located at the connection part of two adjacent cover side plates 1113. The second sub-strengthening part 111e extends along the height direction of the battery device 100 and is connected to the first sub-strengthening part 111b. The first sub-strengthening part 111b is provided with a convex arc section 111c, and both ends of the arc section 111c are respectively connected to two adjacent cover side plates 1113. The thickness of the first sub-strengthening part 111b is equal to the thickness of the second sub-strengthening part 111e. The end of the second sub-strengthening part 111e far from the first sub-strengthening part 111b extends to the side of the cover side plate 1113 far from the cover top plate 1111. The second sub-strengthening part 111e includes a first part 111f and a second part 111g that are connected and arranged at an angle. The first part 111f and the second part 111g are respectively located on two adjacent cover side plates 1113. Both the first part 111f and the second part 111g extend along the height direction of the battery device 100 and are connected to the first sub-strengthening part 111b.The projection length of the first part 111f in the first direction is equal to the projection length of the second part 111g in the second direction. The first direction, the second direction, and the height direction of the battery device 100 intersect pairwise. In the height direction of the battery device 100, the projection length of the first part 111f is equal to the projection length of the second part 111g. In the first direction, the projection length of the first part 111f is equal to the projection length of the first sub-strengthening part 111b. In the second direction, the projection length of the second part 111g is equal to the projection length of the first sub-strengthening part 111b. The connection between the first part 111f and the second part 111g is set with a smooth transition. The connection between the first sub-strengthening part 111b and the first part 111f is set with a smooth transition. The connection between the first sub-strengthening part 111b and the second part 111g is set with a smooth transition. A part of the cover top plate 1111 is recessed outwardly and / or inwardly to form a raised part 1112, and the number of the raised parts 1112 is at least two. Each of the raised parts 1112 extends along the second direction, and at least two raised parts 1112 are arranged at intervals along the first direction. In the first direction, the projection length of the raised part 1112 is greater than the projection length of the part of the cover top plate 1111 between two adjacent raised parts 1112. In the first direction, the projection lengths of all the raised parts 1112 are equal. In the first direction, all the raised parts 1112 are evenly spaced. In the second direction, the opposite ends of the raised part 1112 respectively extend to the opposite sides of the cover top plate 1111. Each of the raised parts 1112 protrudes outwardly from the cover top plate 1111. The first direction is the length direction of the battery device 100, and the second direction is the width direction of the battery device 100. The outer side of the cover body 111 is provided with a first mounting part 1114, and the first mounting part 1114 is configured to be connected to the beam body 400 of the electrical equipment. In an embodiment of the present application, the cover body 111 is configured with the top surface 1117 of the battery box 1, and the box body 12 is configured with the bottom surface 121 of the battery box 1. In the height direction of the battery device 100, the distance between the top surface 1117 and the bottom surface 121 is defined as D, and the distance between the first mounting part 1114 and the bottom surface 121 is defined as d, satisfying the relationship: d / D = 0.5 to 0.8.

[0177] Please refer to Figure 2 , the present application also provides a battery device 100, which includes a battery box 1 and battery cells 20. The battery box 1 includes a box body 12 and an upper cover 11. The specific structure of the upper cover 11 refers to the above embodiment. Since the battery device 100 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the upper cover 11 and the box body 12 are enclosed to form a receiving cavity 1a, and the battery cells 20 are arranged in the receiving cavity 1a.

[0178] Please refer toFigure 1 , this application also provides an electrical device, which includes a battery device 100. For the specific structure of the battery device 100, refer to the above embodiments. Since this electrical device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the electrical device can be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecrafts, etc. Among them, the electric toys can include fixed or mobile electric toys, such as: game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc.; the spacecrafts can include airplanes, rockets, space shuttles, and spaceships, etc.

[0179] The above are only the preferred embodiments of this application, and do not limit the patent scope of this application accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of this application under the inventive concept of this application, or any direct / indirect application in other related technical fields is included in the patent protection scope of this application.

Claims

1. A battery device, characterized in that: include: A battery box, the battery box comprising a box body and an upper cover, wherein the upper cover and the box body are enclosed to form a receiving cavity; The upper cover comprises a cover body and a cover flange, wherein the cover flange is arranged around the circumference of the cover body, the corner area of ​​the cover body is configured as a first reinforcement part, and the other area is configured as a non-reinforced part, and the cover flange is configured as a second reinforcement part, and the thickness of the first reinforcement part and the second reinforcement part is greater than the thickness of the non-reinforced part. The outer side surface of the cover body is provided with a first mounting part, and the first mounting part is configured to be connected to the beam body of the electrical equipment; and A battery cell is disposed in the accommodating cavity.

2. The battery device according to claim 1, characterized in that The thickness of the first reinforcement portion is defined as H1, satisfying the relationship: 4 mm ≤ H1 ≤ 6 mm; And / or, the thickness of the second reinforcement portion is defined as H2, satisfying the relationship: 3 mm ≤ H2 ≤ 6 mm; And / or, the outer surface of the first reinforcement portion is flush with the outer surface of the non-reinforcement portion.

3. The battery device according to claim 1, characterized in that The thickness of the first reinforced portion is defined as H1, and the thickness of the non-reinforced portion is defined as H3, satisfying the relationship: H1≥2H3.

4. The battery device according to claim 1, wherein: The cover body comprises: roof panels; and At least three cover side plates are arranged around the circumference of the cover top plate, the cover flange surrounds the at least three cover side plates, and the connection between at least two adjacent cover side plates is configured as the first reinforcement part.

5. The battery device according to claim 4, characterized in that: The first reinforcement portion comprises: A first sub-reinforcement portion, the first sub-reinforcement portion is located at a corner area of ​​the roof plate; and The second sub-reinforcement portion is located at the connection between two adjacent cover side plates, and the second sub-reinforcement portion is extended along the height direction of the battery device and is connected to the first sub-reinforcement portion.

6. The battery device according to claim 5, characterized in that The first sub-reinforcement portion is provided with an outwardly convex arc segment, and two ends of the arc segment are respectively connected to two adjacent cover side plates; and / or, the thickness of the first sub-reinforcement portion is equal to the thickness of the second sub-reinforcement portion; And / or, one end of the second sub-reinforcement portion away from the first sub-reinforcement portion extends to a side of the cover side plate away from the cover top plate.

7. The battery device according to claim 5, characterized in that: The second sub-reinforcement portion includes a first portion and a second portion which are connected and arranged at an angle, and the first portion and the second portion are respectively located at two adjacent cover side plates; The first portion and the second portion are both extended along the height direction of the battery device and connected to the first sub-reinforcement portion.

8. The battery device according to claim 7, characterized in that: The projection length of the first part in the first direction is equal to the projection length of the second part in the second direction, and the first direction, the second direction and the height direction of the battery device intersect each other; and / or, in the height direction of the battery device, the projection length of the first part is equal to the projection length of the second part; and / or, in the first direction, the projection length of the first portion is equal to the projection length of the first sub-reinforcement portion; and / or, in the second direction, the projection length of the second portion is equal to the projection length of the first sub-reinforcement portion; And / or, a connection between the first part and the second part is arranged with a smooth transition; And / or, a connection between the first sub-reinforcement portion and the first portion is arranged with a smooth transition; And / or, a connection between the first sub-reinforcement portion and the second portion is arranged with a smooth transition.

9. The battery device according to any one of claims 4 to 7, characterized in that: The part of the cover plate is recessed toward the outside and / or the inside to form a raised portion, and the number of the raised portions is at least two; Each of the raised portions is extended along the second direction, the at least two raised portions are spaced apart along the first direction, and the first direction, the second direction and the height direction of the battery device intersect each other.

10. The battery device according to claim 9, characterized in that In the first direction, the projection length of the protrusion is greater than the projection length of the portion of the top plate located between two adjacent protrusions; and / or, in the first direction, the projection lengths of the protrusions are equal; and / or, in the first direction, the protrusions are evenly spaced and distributed; and / or, in the second direction, opposite ends of the raised portion extend to opposite sides of the top plate respectively; And / or, each of the raised portions is arranged to protrude toward the outer side of the top cover plate; And / or, the first direction is a length direction of the battery device, and the second direction is a width direction of the battery device.

11. The battery device according to any one of claims 1 to 7, characterized in that: The cover body is configured with the top surface of the battery box, and the box body is configured with the bottom surface of the battery box; in the height direction of the battery device, the distance between the top surface and the bottom surface is defined as D, and the distance between the first mounting portion and the bottom surface is d, satisfying the relationship: d / D=0.5~0.8; And / or, the first mounting portion includes a connecting plate mounted on the outer side surface of the cover body, the connecting plate is provided with a threaded hole, and the threaded hole is configured to be connected to a beam body of the electrical equipment through a threaded member.

12. A cover, characterized in that: include: A cover body, wherein the corner area of ​​the cover body is configured as a first reinforcement part, and the other areas are configured as non-reinforcement parts, and the outer side surface of the cover body is provided with a first mounting part, and the first mounting part is configured to be connected to the beam body of the electrical equipment; and The cover flange is arranged around the circumference of the cover body, and the cover flange is configured as a second reinforcement part. The thickness of the first reinforcement part and the second reinforcement part are both greater than the thickness of the non-reinforced part.

13. The upper cover according to claim 12, characterized in that: The thickness of the first reinforcement portion is defined as H1, satisfying the relationship: 4 mm ≤ H1 ≤ 6 mm; And / or, define the thickness of the second reinforcement portion as H2, satisfying the relationship: 3㎜≤H1≤6㎜㎜.

14. The upper cover according to claim 12, characterized in that: The cover body comprises: roof panels; and At least three cover side plates are arranged around the circumference of the cover top plate, the cover flange surrounds the at least three cover side plates, and the connection between at least two adjacent cover side plates is configured as the first reinforcement part.

15. The upper cover according to claim 14, characterized in that: The first reinforcement portion includes a first sub-reinforcement portion and a second sub-reinforcement portion, the first sub-reinforcement portion is located at the corner area of ​​the cover top plate; the second sub-reinforcement portion is located at the connection of two adjacent cover side plates and extends along the height direction of the battery device, and the second sub-reinforcement portion is connected to the first sub-reinforcement portion; And / or, a portion of the cover top plate is recessed toward the outside and / or the inside to form a raised portion, and the number of the raised portions is at least two; each of the raised portions extends along the second direction, and the at least two raised portions are spaced apart along the first direction, and the first direction, the second direction and the height direction of the battery device intersect each other.

16. An electrical equipment, characterized in that: Comprising a battery device as claimed in any one of claims 1 to 11.

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