Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, the battery device comprises a box body and a battery monomer assembly, the battery monomer assembly is located in the box body, the box body comprises a frame, a top cover and a bottom plate, and the frame defines a containing cavity, a first opening and a second opening; the first opening and the second opening are formed in the two opposite sides of the containing cavity in the first direction and communicate with the containing cavity. The top cover is connected to the frame and covers the first opening. The bottom plate is connected to the frame and covers the second opening, the bottom plate comprises a first plate body, a second plate body and a plurality of supporting ribs, the first plate body and the second plate body are oppositely arranged in the first direction, the supporting ribs are located between the first plate body and the second plate body and provided with first ends and second ends which are opposite, the first ends are connected with the first plate body, and the second ends are connected with the second plate body. The second end is connected with the second plate body, and at least part of the supporting rib is obliquely arranged relative to the first plate body in the extending direction from the first end to the second end. The reliability of the battery device can be improved.

Description

Technical Field

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

[0002] Battery monomers are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] In the development of battery technology, how to improve the reliability of battery devices is a research direction in battery technology. Utility Model Content

[0004] The present application provides a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] The embodiment of the present application provides a battery device, including a box body and a battery cell assembly, wherein the battery cell assembly is located in the box body, and the box body includes a frame, a top cover, and a bottom plate, wherein the frame is arranged to form a receiving cavity, a first opening, and a second opening, wherein the first opening and the second opening are arranged on opposite sides of the receiving cavity along a first direction and are both connected to the receiving cavity. The top cover is connected to the frame and covers the first opening. The bottom plate is connected to the frame and covers the second opening, and the bottom plate includes a first plate body, a second plate body, and a plurality of support ribs, wherein the first plate body and the second plate body are arranged opposite to each other along a first direction, the support ribs are located between the first plate body and the second plate body and have opposite first and second ends, wherein the first end is connected to the first plate body, and the second end is connected to the second plate body, and in the extension direction from the first end to the second end, at least a portion of the support ribs is arranged obliquely relative to the first plate body.

[0006] In the above technical solution, the battery device of this embodiment is configured to have a double-layer structure by setting the bottom plate of the box body and arranging a plurality of supporting ribs therein, wherein at least a portion of the supporting ribs are inclined. Thus, the inclined supporting ribs play a buffering role when impacted. Compared with vertical supporting ribs, the inclined supporting ribs can effectively absorb external stress and strain, change the direction of force, and will not directly transmit external stress to components located in the box body in the vertical direction, thereby reducing the deformation of components in the box body, such as battery cell assemblies, and improving the reliability of the battery device.

[0007] In some embodiments, the support rib includes an inclined portion located between a first end and a second end, and in the extension direction from the first end to the second end, the inclined portion is inclined relative to the first plate body, and the thickness of the inclined portion is less than the thickness of either the first end or the second end; wherein the thickness direction of the support rib intersects with the first direction.

[0008] In the above technical solution, the structural strength of the connection between the support ribs and the first plate body and the second plate body can be improved, and the direct connection failure of the connection between the support ribs after impact can be reduced.

[0009] In some embodiments, at least one side of the first end on opposite sides in the thickness direction of the support rib smoothly transitions to the first plate body, and / or at least one side of the second end on opposite sides in the thickness direction of the support rib smoothly transitions to the second plate body.

[0010] In the above technical solution, compared with the inclined support ribs directly forming an acute angle or an obtuse angle with the first plate body and the second plate body, the stress concentration problem at the connection between the first end and the first plate body and the connection between the second end 332 and the second plate body can be reduced, thereby further improving the structural strength of the connection.

[0011] In some embodiments, a plurality of support ribs are arranged at intervals along the second direction, and each support rib extends along the third direction, and the first direction, the second direction, and the third direction intersect each other.

[0012] In the above technical solution, the extension length of the supporting ribs in the third direction can be increased, thereby improving the ability of the bottom plate to absorb stress and strain, and also facilitating manufacturing.

[0013] In some embodiments, the bottom plate includes a plurality of bottom plate portions arranged and connected along the second direction, and a size of the frame along the second direction is greater than a size of the frame along the third direction.

[0014] In the above technical solution, the support ribs extend along the third direction, and when the two bottom plate parts are welded, the support ribs can be avoided, thereby reducing the difficulty of welding.

[0015] In some embodiments, the bottom plate portion also includes two side ribs, and the opposite ends of the side ribs in the first direction are respectively connected to the first plate body and the second plate body. The two side ribs are arranged at the opposite ends of the first plate body in the second direction and extend along the third direction. The two adjacent bottom plate portions are connected by two adjacent side ribs.

[0016] In the above technical solution, side ribs are provided to facilitate connection of the two bottom plate parts, such as welding.

[0017] In some embodiments, the inclined portion of the supporting rib has an inclination angle α relative to the first plate body, and α satisfies: 30°≤α≤75°.

[0018] In the above technical solution, the angle between the support rib and the first plate body is set to be greater than or equal to 30° to reduce the risk of the support rib being crushed when impacted; the angle between the support rib and the first plate body is set to be less than or equal to 75° to improve the ability of the support rib to absorb stress and strain.

[0019] In some embodiments, α satisfies: 45°≤α≤60°.

[0020] In the above technical solution, the angle between the support rib and the first plate body is further limited to greater than or equal to 45° to further reduce the risk of the support rib being crushed when impacted; the angle between the support rib 33 and the first plate body is set to less than or equal to 60° to further improve the ability of the support rib to absorb stress and strain.

[0021] In some embodiments, at least some of the supporting ribs have the same inclination direction.

[0022] In the above technical solution, it is easy to manufacture.

[0023] In some embodiments, the plurality of support ribs include a first support rib and a second support rib, and the first support rib and the second support rib are inclined in two opposite directions.

[0024] In the above technical solution, when the plate body located at the lower side is impacted, the first supporting ribs and the second supporting ribs facing opposite directions can absorb stress and strain while also improving the supporting strength and reducing the risk of being crushed.

[0025] In some embodiments, the number of the first support ribs and the second support ribs are both multiple, the multiple first support ribs and the multiple second support ribs are alternately arranged along the second direction, and all extend along the third direction, and the first direction, the second direction and the third direction intersect with each other; the first plate body is located above the second plate body, and along the direction from the first plate body to the second plate body, at least part of the first support ribs and at least part of the second support ribs are inclined toward each other.

[0026] In the above technical solution, the multiple first support ribs and the multiple second support ribs are alternately arranged at close distances to each other, which can further improve the support strength of the bottom plate and reduce the risk of the bottom plate being crushed.

[0027] In some embodiments, the bottom plate further includes a broken rib, which is located between the first plate body and the second plate body, connected to one of the first plate body and the second plate body, and spaced apart from the other of the first plate body and the second plate body.

[0028] In the above technical solution, the provision of broken ribs can reduce the possibility of the bottom plate being squeezed and crushed when impacted, thereby reducing the deformation of the internal components of the box.

[0029] In some embodiments, there are multiple broken ribs, multiple support ribs and multiple broken ribs are alternately arranged along the second direction, and all extend along the third direction, and the first direction, the second direction and the third direction intersect each other.

[0030] In the above technical solution, when the lower plate body is impacted, the possibility of the bottom plate being squeezed and crushed can be further reduced, the deformation of the internal parts of the box body can be further reduced, and the reliability of the battery device can be improved.

[0031] In some embodiments, the dimension of the broken rib along the first direction is h1, the distance between the first plate body and the second plate body is h2, and h1 and h2 satisfy: 1 / 4≤h1 / h2≤1 / 2.

[0032] In the above technical solution, the value of h1 / h2 is limited to greater than or equal to 1 / 4 to improve the supporting capacity of the bottom plate when the ribs are broken when impacted and reduce the possibility of the bottom plate being squeezed and crushed; the value of h1 / h2 is limited to less than or equal to 1 / 2 to reduce the possibility of the impact force being transmitted directly upward in the vertical direction and protect the internal parts of the box.

[0033] In some embodiments, the broken tendon has a first surface and a second surface opposite to each other in a first direction, the first surface is connected to the first plate body or the second plate body, the size of the first surface along the second direction is h3, the size of the second surface along the second direction is h4, h3 and h4 satisfy: 1 / 2≤h4 / h3≤1, wherein the second direction intersects with the first direction.

[0034] In the above technical solution, the value of h4 / h3 is limited to greater than or equal to 2 / 5 to increase the size ratio of the second surface along the second direction and reduce the damage caused to the plate body by the second surface when an external force impacts; the value of h4 / h3 is limited to less than or equal to 1 to increase the structural strength of the connection between the first surface and the first plate body or the second plate body and reduce the problem of stress concentration.

[0035] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery device, and the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0038] Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0039] Figure 3 A schematic diagram of the exploded structure of a box of a battery device provided in some embodiments of the present application;

[0040] Figure 4 A schematic diagram of a structure of a bottom plate in a box of a battery device provided in some embodiments of the present application;

[0041] Figure 5 A schematic diagram of a partial structure of a bottom plate in a box of a battery device provided in some embodiments of the present application;

[0042] Figure 6 Another structural schematic diagram of the bottom plate in the box of the battery device provided in some embodiments of the present application;

[0043] Figure 7 A schematic diagram of another structure of a bottom plate in a box of a battery device provided in some embodiments of the present application;

[0044] Figure 8 A schematic diagram of another structure of a bottom plate in a box of a battery device provided in some embodiments of the present application;

[0045] Fig. 9 Another partial structural schematic diagram of the bottom plate of the box of the battery device provided in some embodiments of the present application.

[0046] The reference numerals of the specific embodiments are as follows:

[0047] 100, vehicle; 200, battery device; 300, controller; 400, motor; 500, battery cell assembly; 600, housing;

[0048] 1. frame; 11. accommodating cavity; 12. first opening; 13. second opening;

[0049] 2. Top cover;

[0050] 3. Bottom plate; 31. First plate body; 32. Second plate body; 33. Support ribs; 331. First end; 332. Second end; 333. First support ribs; 334. Second support ribs; 335. Inclined portion; 34. Broken ribs; 341. First surface; 342. Second surface; 35. Side ribs; 36. Bottom plate portion;

[0051] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0054] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0057] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0058] The term “plurality” used in this application refers to two or more (including two).

[0059] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.

[0060] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. A battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive current collector includes a positive coating area and a positive electrode ear connected to the positive coating area. The positive coating area is coated with a positive active material layer, and the positive electrode ear is not coated with a positive active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes a positive active material. The positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, and the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.

[0061] The battery device generally includes a box body and a battery cell assembly located in the box body. The box body has a bottom plate, which is used to protect the internal battery cell assembly from being affected or being less affected when subjected to external stress. The bottom plate is generally a single-layer structure, and the protection ability of a single-layer bottom plate is poor. When subjected to impact from below, the battery cell assembly located above the bottom plate will be subjected to a greater impact and produce a greater deformation.

[0062] In view of this, the present application provides a battery device, which arranges the bottom plate of the box into a double-layer structure and arranges a plurality of supporting ribs therein, wherein at least a portion of the supporting ribs are inclined relative to the first plate body. In this way, the inclined supporting ribs can absorb external stress and strain when impacted, thereby reducing the deformation of the bottom plate, thereby reducing the deformation of components in the box, such as battery cell assemblies, and improving the reliability of the battery device.

[0063] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0064] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0065] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0066] like Figure 1 As shown, a battery device 200 is disposed inside the vehicle 100, and the battery device 200 may be disposed at the bottom, head, or tail of the vehicle 100. The battery device 200 may be used to power the vehicle 100, for example, the battery device 200 may be used as an operating power source for the vehicle 100.

[0067] The vehicle 100 may further include a controller 300 and a motor 400 . The controller 300 is used to control the battery device 200 to supply power to the motor 400 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 100 .

[0068] In some embodiments of the present application, the battery device 200 can not only serve as an operating power source for the vehicle 100, but also serve as a driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0069] Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of the present application; Figure 3 A schematic diagram of the exploded structure of a box of a battery device provided in some embodiments of the present application; Figure 4 A schematic diagram of the structure of a bottom plate in a box of a battery device provided in some embodiments of the present application.

[0070] like Figure 2-Figure 4As shown, the present application also provides a battery device 200, including a box body 600 and a battery cell assembly 500, wherein the battery cell assembly 500 is located in the box body 600. The box body 600 includes a frame 1, a top cover 2, and a bottom plate 3. The frame 1 is surrounded to form a receiving cavity 11, a first opening 12, and a second opening 13, wherein the first opening 12 and the second opening 13 are arranged on opposite sides of the receiving cavity 11 along the first direction X and are both connected to the receiving cavity 11. The top cover 2 is connected to the frame 1 and covers the first opening 12. The bottom plate 3 is connected to the frame 1 and covers the second opening 13. The bottom plate 3 includes a first plate body 31, a second plate body 32 and a plurality of support ribs 33. The first plate body 31 and the second plate body 32 are arranged opposite to each other along the first direction X. The support rib 33 is located between the first plate body 31 and the second plate body 32 and has a first end 331 and a second end 332 opposite to each other. The first end 331 is connected to the first plate body 31, and the second end 332 is connected to the second plate body 32. In the extending direction from the first end 331 to the second end 332, at least a portion of the support rib 33 is inclined relative to the first plate body 31.

[0071] The battery device 200 mentioned in the embodiment of the present application may include one or more battery cell assemblies 500 for providing voltage and capacity. The battery cell assembly 500 may include a plurality of battery cells, which are connected in series, in parallel or in hybrid connection through a busbar.

[0072] In some embodiments, the battery cell assembly 500 is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly 500 may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0073] As an example, the battery cell assembly 500 may be a battery module, and the battery cell assembly 500 may be accommodated in the box body 600 by fixing the battery module in the box body 600 .

[0074] As an example, the battery cell assembly 500 may also be accommodated in the case 600 by directly fixing a plurality of battery cells to the case 600 .

[0075] As an example, the box 600 can be used as a part of the chassis structure of the vehicle 100. For example, the roof 2 of the box 600 can become at least a part of the floor of the vehicle 100, or the frame 1 of the box 600 can become at least a part of the cross beam and longitudinal beam of the vehicle 100.

[0076] The top cover 2 of this embodiment can be connected to the frame 1 by bolt connection or riveting. The bottom plate 3 of this embodiment can be connected to the frame 1 by welding or riveting.

[0077] In this embodiment, the first plate body 31 and the second plate body 32 are arranged opposite to each other along the first direction X, and the sizes of the two plates can be the same or different. Optionally, the bottom plate 3 is entirely formed by extrusion of aluminum.

[0078] The supporting ribs 33 of this embodiment may be in strip, block or other shapes.

[0079] Optionally, the support rib 33 is integrally formed with the first plate body 31 and the second plate body 32 .

[0080] Optionally, a plurality of support ribs 33 are arranged in a dot matrix between the first plate body 31 and the second plate body 32 .

[0081] In this embodiment, in the extension direction from the first end 331 to the second end 332, at least part of the support rib 33 is arranged obliquely relative to the first plate body 31, that is, in the extension direction from the first end 331 to the second end 332, at least part of the support rib 33 forms an angle with the first plate body 31. It should be noted that the support rib 33 is arranged obliquely, that is, the opposite sides of the inclined part of the support rib 33 are inclined toward the same side, for example, they are inclined toward the left side or the right side at the same time, wherein the inclination angles of the opposite sides of the inclined part relative to the first plate body 31 may be the same or different.

[0082] In this embodiment, the entire support rib 33 in the extension direction from the first end 331 to the second end 332 may be arranged to be inclined relative to the first plate body 31 , or part of the support rib 33 may be arranged to be inclined relative to the first plate body 31 .

[0083] The support rib 33 of this embodiment may extend in a straight line or a folded line in an extending direction from the first end 331 to the second end 332 , or may extend in a curved line or other shapes.

[0084] The inclination directions of the plurality of support ribs 33 in this embodiment may be the same or different.

[0085] The battery device 200 of this embodiment is configured such that the bottom plate 3 of the box body 600 is configured as a double-layer structure, and a plurality of support ribs 33 are disposed therein, wherein at least a portion of the support ribs 33 are configured to be inclined. Thus, the inclined support ribs 33 act as buffers when impacted. Compared with the vertical support ribs 33, the inclined support ribs 33 can effectively absorb external stress and strain, change the direction of force, and will not directly transmit the external stress to the components located in the box body 600 in the vertical direction, thereby reducing the deformation of the components in the box body 600, such as the battery cell assembly 500, and improving the reliability of the battery device 200.

[0086] Figure 5 A schematic diagram of a partial structure of a bottom plate in a box of a battery device provided in some embodiments of the present application.

[0087] See also Figure 5 In some embodiments, the support rib 33 includes an inclined portion 335 located between the first end 331 and the second end 332. In the extension direction from the first end 331 to the second end 332, the inclined portion 335 is inclined relative to the first plate body 31. The thickness of the inclined portion 335 is less than the thickness of either the first end 331 or the second end 332, wherein the thickness direction of the support rib 33 intersects with the first direction X.

[0088] Optionally, the thickness direction of the supporting rib 33 is perpendicular to the first direction X.

[0089] For the strip-shaped support rib 33 , the thickness direction of the support rib 33 refers to the direction intersecting with the length direction thereof, and the thickness direction is not the first direction X, and the first direction X is the height direction thereof.

[0090] For the block-shaped support rib 33 , the thickness direction of the support rib 33 refers to the direction intersecting with the first direction X.

[0091] In this embodiment, the thickness direction of the support rib 33 is in the same direction as the thickness direction of the inclined portion 335 , the thickness direction of the first end 331 , and the thickness direction of the second end 332 .

[0092] Such a configuration can improve the structural strength of the connection between the support rib 33 and the first plate body 31 and the second plate body 32, and reduce the direct connection failure of the connection of the support rib 33 after being impacted.

[0093] Optionally, a size of the first plate body 31 or the second plate body 32 in the first direction X ranges from 1.8 mm to 2.5 mm.

[0094] Optionally, the thickness of the inclined portion 335 ranges from 2 mm to 3 mm.

[0095] In some embodiments, the first end 331 smoothly transitions to the first plate body 31 on at least one side opposite to the support rib 33 in the thickness direction, and / or the second end 332 smoothly transitions to the second plate body 32 on at least one side opposite to the support rib 33 in the thickness direction.

[0096] Optionally, the first end 331 has two opposite sides in the thickness direction of the support rib 33 and a smooth transition to the first plate body 31 . The second end 332 has two opposite sides in the thickness direction of the support rib 33 and a smooth transition to the second plate body 32 .

[0097] Compared with the inclined support rib 33 directly forming an acute angle or an obtuse angle with the first plate body 31 and the second plate body 32, such a configuration can reduce the stress concentration problem at the connection between the first end 331 and the first plate body 31 and the connection between the second end 332 and the second plate body 32, and further improve the structural strength of the connection.

[0098] Please continue to refer to Figure 4 In some embodiments, a plurality of support ribs 33 are arranged at intervals along the second direction Y, and each support rib 33 extends along the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0099] Optionally, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0100] The support rib 33 of this embodiment is a long strip structure, the length direction of which is the third direction Z, and the thickness direction is the second direction Y.

[0101] Such an arrangement can increase the extension length of the support ribs 33 in the third direction Z, thereby improving the ability of the bottom plate 3 to absorb stress and strain, and also facilitates manufacturing.

[0102] In some embodiments, the bottom plate 3 includes a plurality of bottom plate portions 36 arranged and connected along the second direction Y, and a dimension of the frame 1 along the second direction Y is greater than a dimension of the frame 1 along the third direction Z.

[0103] The bottom plate 3 of this embodiment may be formed by welding two bottom plate parts 36 .

[0104] In this configuration, the support ribs 33 extend along the third direction Z. When the two bottom plate portions 36 are welded, the support ribs 33 can be avoided, thereby reducing the welding difficulty.

[0105] In some embodiments, the bottom plate portion 36 also includes two side ribs 35, and the side ribs 35 are respectively connected to the first plate body 31 and the second plate body 32 at opposite ends in the first direction X. The two side ribs 35 are arranged at opposite ends of the first plate body 31 in the second direction Y and extend along the third direction Z. The two adjacent bottom plate portions 36 are connected by two adjacent side ribs 35.

[0106] The side ribs 35 of this embodiment are long strip structures. Optionally, two side ribs 35 close two openings formed by the first plate body 31 and the second plate body 32 and facing each other in the second direction Y.

[0107] In this embodiment, two adjacent bottom plate portions 36 are connected via two adjacent side ribs 35 , and the two adjacent side ribs 35 may be connected by welding or bonding.

[0108] Side ribs 35 are provided to facilitate connection of the two bottom plate portions 36 , for example, by welding.

[0109] In some embodiments, the inclined portion of the support rib 33 has an inclination angle α relative to the first plate body 31 , and α satisfies: 30°≤α≤75°.

[0110] The inclination angle of the support rib 33 relative to the first plate body 31 in the embodiment of the present application refers to the angle formed by the inclined portion of the support rib 33 or the extended portion of the inclined portion and the first plate body 31 .

[0111] Optionally, the value of α is 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70° or 75°.

[0112] The angle between the support rib 33 and the first plate body 31 is set to be greater than or equal to 30° to reduce the risk of the support rib 33 being crushed when impacted; the angle between the support rib 33 and the first plate body 31 is set to be less than or equal to 75° to improve the ability of the support rib 33 to absorb stress and strain.

[0113] In some embodiments, α satisfies: 45°≤α≤60°.

[0114] Optionally, the value of α is 45°, 47°, 49°, 50°, 52°, 55°, 58° or 60°.

[0115] The angle between the support rib 33 and the first plate body 31 is further limited to be greater than or equal to 45° to further reduce the risk of the support rib 33 being crushed when impacted; the angle between the support rib 33 and the first plate body 31 is set to be less than or equal to 60° to further improve the ability of the support rib 33 to absorb stress and strain.

[0116] In some embodiments, at least some of the supporting ribs 33 have the same inclination direction.

[0117] Optionally, the inclination directions of all the supporting ribs 33 are the same.

[0118] When the inclination directions of the parts of the support ribs 33 in the first direction X are different, the inclination directions of the corresponding parts of at least a portion of the support ribs 33 in the first direction X are the same.

[0119] This arrangement makes production easier.

[0120] Figure 6 Another schematic diagram of the structure of the bottom plate in the box of the battery device provided in some embodiments of the present application.

[0121] See also Figure 6 In some embodiments, the plurality of support ribs 33 include a first support rib 333 and a second support rib 334, and the first support rib 333 and the second support rib 334 are inclined in two opposite directions.

[0122] In this embodiment, the inclined portion of the first supporting rib 333 and the inclined portion of the second supporting rib 334 may have the same or different inclination angles relative to the first plate body 31 .

[0123] Optionally, the number of the first supporting rib 333 and the number of the second supporting rib 334 are both plural.

[0124] With such arrangement, when the plate body at the lower side is impacted, the first supporting ribs 333 and the second supporting ribs 334 facing opposite directions can absorb stress and strain while also improving the supporting strength and reducing the risk of being crushed.

[0125] In some embodiments, the number of the first support rib 333 and the second support rib 334 are both multiple, the multiple first support ribs 333 and the multiple second support ribs 334 are alternately arranged along the second direction Y, and all extend along the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other; the first plate body 31 is located above the second plate body 32, and along the direction from the first plate body 31 to the second plate body 32, at least part of the first support rib 333 and at least part of the second support rib 334 are inclined toward each other.

[0126] In this embodiment, the number of the first supporting ribs 333 and the number of the second supporting ribs 334 may be the same or different.

[0127] In this embodiment, the inclined portion of the first supporting rib 333 and the inclined portion of the second supporting rib 334 may have the same or different inclination angles relative to the first plate body 31 .

[0128] Optionally, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0129] With such arrangement, the plurality of first support ribs 333 and the plurality of second support ribs 334 are alternately arranged close to each other, which can further improve the support strength of the bottom plate 3 and reduce the risk of the bottom plate 3 being crushed.

[0130] Figure 7 This is another structural schematic diagram of the bottom plate in the box of the battery device provided in some embodiments of the present application. Figure 8 A schematic diagram of another structure of the bottom plate in the box of the battery device provided in some embodiments of the present application.

[0131] See also Figure 7 and Figure 8 In some embodiments, the bottom plate 3 further includes a rib 34, which is located between the first plate body 31 and the second plate body 32. The rib 34 is connected to one of the first plate body 31 and the second plate body 32, and is spaced apart from the other of the first plate body 31 and the second plate body 32.

[0132] Optionally, the first plate body 31 is located above the second plate body 32 , and the ribs 34 are connected to the first plate body 31 .

[0133] The shape of the broken tendon 34 in the embodiment of the present application can be strip-shaped, block-shaped or other shapes.

[0134] Optionally, the broken rib 34 is in a strip shape, and the cross-sectional shape of the broken rib 34 in its own length direction is rectangular, trapezoidal or irregular.

[0135] The provision of the broken ribs 34 can reduce the possibility of the bottom plate 3 being squeezed and crushed when impacted, thereby reducing the deformation of the internal components of the box body 600.

[0136] In some embodiments, there are multiple broken ribs 34, multiple support ribs 33 and multiple broken ribs 34 are alternately arranged along the second direction Y, and all extend along the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0137] Optionally, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0138] With such arrangement, when the lower plate body is impacted, the possibility of the bottom plate 3 being squeezed and crushed can be further reduced, the deformation of the internal components of the box body 600 can be further reduced, and the reliability of the battery device 200 can be improved.

[0139] Fig. 9 Another partial structural schematic diagram of the bottom plate of the box of the battery device provided in some embodiments of the present application.

[0140] See also Fig. 9 In some embodiments, the dimension of the broken rib 34 along the first direction X is h1, the distance between the first plate 31 and the second plate 32 is h2, and h1 and h2 satisfy: 1 / 4≤h1 / h2≤1 / 2.

[0141] In this embodiment, the distance between the first plate body 31 and the second plate body 32 is the distance between the first plate body 31 and the second plate body 32 in the first direction X.

[0142] Optionally, the value of h1 / h2 may be 1 / 4, 3 / 8 or 1 / 2.

[0143] The value of h1 / h2 is limited to be greater than or equal to 1 / 4 to improve the supporting capacity of the broken ribs 34 when the bottom plate 3 is impacted and reduce the possibility of the bottom plate 3 being squeezed and crushed; the value of h1 / h2 is limited to be less than or equal to 1 / 2 to reduce the possibility of the impact force being directly transmitted upward in the vertical direction and protect the internal parts.

[0144] Optional, 2mm≤h1≤3mm.

[0145] In some embodiments, the broken rib 34 has a first surface 341 and a second surface 342 opposite to each other in the first direction X, the first surface 341 is connected to the first plate body 31 or the second plate body 32, the size of the first surface 341 along the second direction Y is h3, the size of the second surface 342 along the second direction Y is h4, h3 and h4 satisfy: 2 / 5≤h4 / h3≤1, wherein the second direction Y intersects with the first direction X.

[0146] Optionally, the value of h4 / h3 can be 2 / 5, 1 / 2, 3 / 5, 4 / 5 or 1.

[0147] The second direction Y of this embodiment is the thickness direction of the rib 34. Exemplarily, the rib 34 is a strip structure, and its thickness direction is perpendicular to its length direction.

[0148] The value of h4 / h3 is limited to greater than or equal to 2 / 5 to increase the size ratio of the second surface 342 along the second direction Y and reduce the damage caused to the plate body by the second surface when an external force impacts; the value of h4 / h3 is limited to less than or equal to 1 to increase the structural strength of the connection between the first surface 341 and the first plate body 31 or the second plate body 32 and reduce the stress concentration problem.

[0149] Optionally, h3 is 4mm and h4 is 2mm.

[0150] The embodiment of the present application further provides an electrical device, including the above-mentioned battery device 200, and the battery device 200 is used to provide electrical energy.

[0151] See also Figure 2-Figure 8The embodiment of the present application provides a battery device 200, including a box body 600 and a battery cell assembly 500, wherein the battery cell assembly 500 is located in the box body 600. The box body 600 includes a frame 1, a top cover 2, and a bottom plate 3. The frame 1 is surrounded to form a receiving cavity 11, a first opening 12, and a second opening 13, wherein the first opening 12 and the second opening 13 are arranged on opposite sides of the receiving cavity 11 along a first direction X and are both connected to the receiving cavity 11. The top cover 2 is connected to the frame 1 and covers the first opening 12. The bottom plate 3 is connected to the frame 1 and covers the second opening 13. The bottom plate 3 includes a first plate body 31, a second plate body 32 and a plurality of support ribs 33. The first plate body 31 and the second plate body 32 are arranged opposite to each other along the first direction X. The support rib 33 is located between the first plate body 31 and the second plate body 32 and has a first end 331 and a second end 332 opposite to each other. The first end 331 is connected to the first plate body 31, and the second end 332 is connected to the second plate body 32. In the extending direction from the first end 331 to the second end 332, at least part of the support rib 33 is arranged obliquely relative to the first plate body 31. The support rib 33 includes an inclined portion 335 located between the first end 331 and the second end 332. In the extending direction from the first end 331 to the second end 332, the inclined portion 335 is arranged obliquely relative to the first plate body 31. The thickness of the inclined portion 335 is less than the thickness of either the first end 331 or the second end 332. The thickness direction of the support rib 33 intersects with the first direction X. The first end 331 smoothly transitions to the first plate body 31 on at least one side of the opposite sides in the thickness direction of the support rib 33, and the second end 332 smoothly transitions to the second plate body 32 on at least one side of the opposite sides in the thickness direction of the support rib 33. A plurality of support ribs 33 are arranged at intervals along the second direction Y, and each support rib 33 extends along the third direction Z. The first direction X, the second direction Y and the third direction Z intersect each other. The bottom plate 3 includes a plurality of bottom plate portions 36 arranged and connected along the second direction Y, and the size of the frame 1 along the second direction Y is greater than the size of the frame 1 along the third direction Z. The bottom plate portion 36 also includes two side ribs 35, and the opposite ends of the side ribs 35 in the first direction X are respectively connected to the first plate body 31 and the second plate body 32. The two side ribs 35 are arranged at the opposite ends of the first plate body 31 in the second direction Y and extend along the third direction Z. Two adjacent bottom plate portions 36 are connected by two adjacent side ribs 35. The bottom plate 3 further includes a rib 34 , which is located between the first plate 31 and the second plate 32 . The rib 34 is connected to one of the first plate 31 and the second plate 32 , and is spaced apart from the other of the first plate 31 and the second plate 32 .

[0152] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, comprising a box and a battery cell assembly, wherein the battery cell assembly is located in the box, characterized in that: The box body comprises: A frame, which is surrounded to form a receiving cavity, a first opening, and a second opening, wherein the first opening and the second opening are arranged at opposite sides of the receiving cavity along a first direction and are both communicated with the receiving cavity; A top cover connected to the frame and covering the first opening; A bottom plate is connected to the frame and covers the second opening, the bottom plate includes a first plate body, a second plate body and a plurality of support ribs, the first plate body and the second plate body are arranged opposite to each other along the first direction, the support rib is located between the first plate body and the second plate body and has a first end and a second end opposite to each other, the first end is connected to the first plate body, and the second end is connected to the second plate body, and in the extension direction from the first end to the second end, at least a part of the support rib is inclined relative to the first plate body.

2. The battery device according to claim 1, characterized in that: The supporting rib includes an inclined portion located between the first end and the second end, wherein the inclined portion is inclined relative to the first plate body in an extending direction from the first end to the second end, and a thickness of the inclined portion is less than a thickness of either the first end or the second end; Wherein, the thickness direction of the supporting rib intersects with the first direction.

3. The battery device according to claim 2, characterized in that: The first end smoothly transitions to the first plate body on at least one side opposite to the first plate body in the thickness direction of the support rib, and / or the second end smoothly transitions to the second plate body on at least one side opposite to the first plate body in the thickness direction of the support rib.

4. The battery device according to claim 1, characterized in that: The plurality of support ribs are arranged at intervals along the second direction, and each of the support ribs extends along a third direction, and the first direction, the second direction and the third direction intersect each other.

5. The battery device according to claim 4, characterized in that: The bottom plate includes a plurality of bottom plate portions arranged and connected along the second direction, and a size of the frame along the second direction is greater than a size of the frame along the third direction.

6. The battery device according to claim 5, characterized in that: The bottom plate portion also includes two side ribs, and the opposite ends of the side ribs in the first direction are respectively connected to the first plate body and the second plate body. The two side ribs are arranged at the opposite ends of the first plate body in the second direction and extend along the third direction. The two adjacent bottom plate portions are connected by the two adjacent side ribs.

7. The battery device according to claim 1, characterized in that: The inclined portion of the supporting rib has an inclination angle α relative to the first plate body, and α satisfies: 30°≤α≤75°.

8. The battery device according to claim 7, characterized in that: The α satisfies: 45°≤α≤60°.

9. The battery device according to claim 1, characterized in that: At least some of the supporting ribs have the same inclination direction.

10. The battery device according to claim 1, characterized in that: The plurality of support ribs include first support ribs and second support ribs, and the first support ribs and the second support ribs are inclined in two opposite directions.

11. The battery device according to claim 10, characterized in that: The number of the first supporting ribs and the number of the second supporting ribs are both multiple, the multiple first supporting ribs and the multiple second supporting ribs are alternately arranged along the second direction, and all extend along the third direction, and the first direction, the second direction and the third direction intersect each other; The first plate body is located above the second plate body, and along the direction from the first plate body to the second plate body, at least a portion of the first supporting rib and at least a portion of the second supporting rib are inclined toward each other.

12. The battery device according to any one of claims 1 to 11, characterized in that: The bottom plate further includes a broken rib, which is located between the first plate body and the second plate body, the broken rib is connected to one of the first plate body and the second plate body, and is spaced apart from the other of the first plate body and the second plate body.

13. The battery device according to claim 12, characterized in that: There are multiple broken ribs, and the multiple support ribs and the multiple broken ribs are alternately arranged along the second direction and all extend along the third direction. The first direction, the second direction and the third direction intersect each other.

14. The battery device according to claim 12, characterized in that: The dimension of the broken rib along the first direction is h1, the distance between the first plate body and the second plate body is h2, and h1 and h2 satisfy: 1 / 4≤h1 / h2≤1 / 2.

15. The battery device according to claim 12, characterized in that: The broken tendon has a first surface and a second surface opposite to each other in the first direction, the first surface is connected to the first plate body or the second plate body, the size of the first surface along the second direction is h3, the size of the second surface along the second direction is h4, the h3 and the h4 satisfy: 1 / 2≤h4 / h3≤1, and the second direction intersects with the first direction.

16. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 15, wherein the battery device is used to provide electrical energy.

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