Battery box, battery and electric device

Abstract

A battery box (200), a battery (1100) and an electric device, the battery box (200) comprising a first box body (210) and a connector (220), wherein the first box body (210) is provided with an accommodating space (201) for accommodating a battery cell (100), a fixing portion (211) is provided at the side of the first box body (210) that faces away from the accommodating space (201), and the fixing portion (211) is provided with a first connecting hole (2111); and the connector (220) is provided with a threaded hole (221) for threaded connection with a bolt (230), the first connecting hole (2111) and the threaded hole (221) being arranged opposite each other, enabling the bolt (230) to pass through the first connecting hole (2111) and thread into the threaded hole (221).

Description

Battery boxes, batteries and electrical devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 17, 2023, with application number 202311542138.X and invention name “Battery box, battery and electrical device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of battery technology, and in particular relates to a battery box, a battery and an electrical device. Background Art

[0003] Battery packs are widely used in various electronic devices, such as mobile phones, laptops, electric cars, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes, and power tools, etc.

[0004] In the research of battery technology, how to reduce the size of the battery and improve the volume energy density of the battery is an important research direction.

[0005] Application Contents

[0006] The purpose of the embodiments of the present application is to provide a battery box, a battery and an electrical device to increase the volume energy density of the battery.

[0007] The technical solution adopted in the embodiment of this application is:

[0008] In a first aspect, a battery box is provided, which includes a first box body and a connecting member, the first box body is provided with a receiving space for accommodating battery cells, the side of the first box body facing away from the receiving space is provided with a fixing portion, and the fixing portion is provided with a first connecting hole; the connecting member is provided with a threaded hole for being screwed to a bolt, and the first connecting hole is arranged opposite to the threaded hole so that the bolt passes through the first connecting hole and is screwed to the threaded hole.

[0009] In the battery box of the embodiment of the present application, the connecting piece is provided with a threaded hole that cooperates with the bolt, so that the connecting piece can replace the nut to be connected with the bolt; at the same time, the connecting piece may not be designed according to the standard size of the nut, that is, the size of the connecting piece may be designed to be smaller than the standard size of the nut, saving space on the side of the first box body facing the fixed part, thereby reducing the size of the battery box, reducing the size of the battery, and improving the volume energy density of the battery.

[0010] In one embodiment, the connecting member is a steel member, an aluminum alloy member, or a copper alloy member.

[0011] On the basis of meeting the connection strength requirements of the bolts and the connectors, the size of the connectors can be made smaller, further saving the space occupied by the first box, reducing the size of the battery box, and improving the volume energy density of the battery.

[0012] In one embodiment, the receiving space and the fixing portion are respectively located on two opposite sides of the first box along the first direction.

[0013] By adopting the technical solution of this embodiment, the size of the connector in the first direction can be designed to be smaller, saving space in the first direction, so that the battery can be used in electrical devices with stricter requirements on the size in the first direction.

[0014] In one embodiment, the axis of the first connecting hole is parallel to the second direction, and the first direction is perpendicular to the second direction.

[0015] By adopting the technical solution of this embodiment, the bolt passes through the first connecting hole along the second direction and is screwed to the threaded hole; and the second direction is perpendicular to the first direction, and the bolt can be installed on the other side of the first box along the first direction to facilitate the installation of the bolt.

[0016] In one embodiment, the nominal diameter of the threaded hole is D, and the dimension of the connecting piece in the first direction is L, wherein 1.1≤L / D≤2, optionally, 1.2≤L / D≤1.7.

[0017] By adopting the technical solution of this embodiment, it is possible to take into account both the reliability of the connection of the connector and the effect of saving space, thereby improving the reliability of the battery and the volume energy density.

[0018] In one embodiment, the connecting member is a long strip structure extending along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0019] By adopting the technical solution of this embodiment, the connecting member has a long strip structure, so that the connecting member has a larger size in the third direction, the structural reliability of the connecting member is good, and the reliability of the connection with the bolts is improved; in addition, the connecting member can be provided with multiple bolt holes in the third direction to improve the reliability of the connection with the second box body or the mounting fitting.

[0020] In one embodiment, there are multiple threaded holes, and the multiple threaded holes are spaced apart along the third direction.

[0021] By adopting the technical solution of this embodiment, the connecting part can be screwed to multiple threaded holes through multiple bolts to achieve multi-point connection between the first box body and the second box body or multi-point connection between the first box body and the mounting fitting, thereby improving connection reliability and improving the reliability of battery use.

[0022] In one embodiment, the fixing portion is configured with a mounting cavity for communication with the first connecting hole, and the connecting member is located in the mounting cavity.

[0023] By adopting the technical solution of this embodiment, the connecting member is located in the installation cavity of the fixing portion, which can make full use of the space inside the fixing portion, which is beneficial to reducing the size of the first box and improving the volume energy density of the battery; in addition, the fixing portion can also protect the connecting member and improve the reliability of the connection.

[0024] In one embodiment, the connecting member is bonded to a cavity wall surface of the installation cavity.

[0025] By adopting the technical solution of this embodiment, the connecting part is fixed in the installation cavity by bonding. On the one hand, the fixing of the connecting part is achieved, and the screwing operation of the bolts and threaded holes is simpler and faster; on the other hand, the fixing operation is simple by bonding, which is conducive to improving assembly efficiency.

[0026] In one embodiment, at least one of two opposite surfaces of the connecting member along the first direction abuts against a cavity wall surface of the installation cavity.

[0027] By adopting the technical solution of this embodiment, at least one of the two opposite surfaces of the connecting member along the first direction abuts against the cavity wall of the installation cavity, which can save space in the installation cavity in the first direction, reduce the size of the first box in the first direction, reduce the size of the battery in the first direction, and improve the volume energy density of the battery.

[0028] In one embodiment, the threaded hole includes a first threaded hole segment and a second threaded hole segment that are connected; the connecting piece includes a connected body and a protrusion, the protrusion protrudes from the surface of the body, the body is constructed with the first threaded hole segment, and the protrusion is constructed with the second threaded hole segment.

[0029] By adopting the technical solution of this embodiment, the provision of the raised portion can reduce material accumulation in the connecting member, which is conducive to achieving a lightweight design.

[0030] In one embodiment, the height of the protrusion protruding from the body is h, the nominal diameter of the threaded hole is D, and 0.5≤h / D≤2; optionally, 0.7≤h / D≤1.5.

[0031] By adopting the technical solution of the embodiment, the connector can take into account both the reliability of the connection and the size of the battery box.

[0032] In one embodiment, the height of the protrusion protruding from the main body is h, 0.5mm≤h / D≤50mm; optionally, 5mm≤h / D≤30mm.

[0033] By adopting the technical solution of the embodiment, the connector can take into account both the reliability of the connection and the size of the battery box.

[0034] In one embodiment, the first box body includes a plate, and the receiving space and the fixing part are respectively located on two opposite sides of the plate along the first direction; the edge of the plate is bent to form a bent structure, and at least part of the bent structure forms the fixing part; or, the first box body also includes a side frame strip, which is connected to the edge of the plate, and at least part of the side frame strip forms the fixing part.

[0035] By adopting the technical solution of this embodiment, the structure of the first box is simple and easy to manufacture.

[0036] In one embodiment, the battery box further includes a second box body, the second box body is connected to the fixing portion, and the first box body and the second box body are surrounded to form a receiving space.

[0037] By adopting the technical solution of this embodiment, the battery box adopts the structural form of the first box body and the second box body, which has a simple structure and is easy to process and manufacture.

[0038] In one embodiment, the second box body is provided with a second connection hole for allowing a bolt to pass through.

[0039] By adopting the technical solution of this embodiment, the second box body can directly use the bolts and threaded holes of the connecting parts to achieve the connection between the first box body and the second box body. This does not require the setting of other connecting structures, which is beneficial to reducing parts, saving space, and also beneficial to improving the volume energy density of the battery.

[0040] In one embodiment, the fixing portion is connected to a connecting portion, the connecting portion protrudes from a surface of the plate facing the receiving space, the connecting portion is located in the second box, and a sealing member is provided between the connecting portion and the inner wall of the second box.

[0041] By adopting the technical solution of this embodiment, the sealing member is filled between the connecting portion and the second box body. On the one hand, the sealing performance between the first box body and the second box body can be increased, thereby improving the reliability of the battery. In addition, the setting of the connecting portion can also increase the connection area between the first box body and the second box body, thereby facilitating the setting of the sealing member and achieving a better sealing effect.

[0042] In one embodiment, the plate is provided with fixing portions on two opposite sides along the second direction, and the first direction intersects the second direction.

[0043] By adopting the technical solution of this embodiment, fixing parts are provided on both opposite sides of the plate, which can increase the connection points between the first box body and the second box body and improve the reliability of the connection between the first box body and the second box body; or, increase the mounting points of the battery box and improve the reliability of battery mounting.

[0044] In one embodiment, the first box body also includes a first sealing plate and a second sealing plate, one of the side portions of the two sides of the plate relatively distributed along the third direction is connected to the first sealing plate, and the other side portion of the two sides of the plate relatively distributed along the third direction is connected to the second sealing plate; the first sealing plate, the second sealing plate and the plate are jointly arranged to form a receiving space, and the first direction, the second direction and the third direction are perpendicular to each other.

[0045] By adopting the technical solution of this embodiment, the structure of the first box is simple and easy to manufacture.

[0046] In one embodiment, the first box body further includes a plurality of mounting beams connected to the plate, the plurality of mounting beams are located between the two mounting parts, the plurality of mounting beams are spaced apart along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0047] By adopting the technical solution of this embodiment, the provision of multiple mounting beams can play a role in strengthening the structural strength of the panel, thereby improving the structural strength of the first box body, and facilitating improved reliability of the battery and electrical devices.

[0048] In one embodiment, the plurality of mounting beams are located on a side of the panel facing away from the receiving space.

[0049] By adopting the technical solution of this embodiment, the mounting beam is located outside the receiving space and does not occupy the space of the receiving space, so that the receiving space can accommodate more battery cells, which is beneficial to improving the volume energy density of the battery.

[0050] In one embodiment, the first box body also includes a first module beam and a second module beam for connecting to the battery cell, the first module beam and the second module beam are located in the receiving space, the first module beam is connected to one of the two sides of the plate distributed relatively along the third direction, and the second module beam is connected to the other side of the two sides of the plate distributed relatively along the third direction.

[0051] By adopting the technical solution of this embodiment, the first module beam and the second module beam are connected to the battery cell, so that the first module beam and the second module beam support and fix the battery cell, which is beneficial to improving the structural strength of the battery box and improving the reliability of the battery.

[0052] In one embodiment, along the third direction, the first mounting beam is disposed opposite to the first module beam, and / or the last mounting beam is disposed opposite to the second module beam.

[0053] By adopting the technical solution of this embodiment, the structural strength of the first box can be improved, which is beneficial to improving the reliability of the battery.

[0054] In one embodiment, the plate is a heat exchange member for exchanging heat with the battery cells.

[0055] By adopting the technical solution of this embodiment, the heat exchange element is directly a plate of the first box body, so there is no need to set up a separate plate, which can reduce the number of parts, save space, and improve the volume energy density of the battery.

[0056] In one embodiment, the fixing portion is used to connect to the mounting fitting via bolts to enable mounting of the battery box.

[0057] By adopting the technical solution of this embodiment, the fixing portion can be used as a mounting structure for the battery, and the battery is mounted by bolts. The mounting operation is simple, which is conducive to improving the mounting efficiency.

[0058] In a second aspect, a battery is provided, comprising a battery box as described in the above embodiment.

[0059] In a third aspect, an electrical device is provided, comprising a battery according to the above embodiment.

[0060] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only one embodiment of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0062] FIG1 is a schematic structural diagram of a vehicle provided in one embodiment of the present application.

[0063] FIG2 is a first structural diagram of a battery provided in another embodiment of the present application.

[0064] FIG3 is an exploded schematic diagram of the battery shown in FIG2 .

[0065] FIG4 is a second structural schematic diagram of the battery shown in FIG2 .

[0066] FIG5 is a cross-sectional view taken along line AA in FIG4 .

[0067] FIG6 is a partial enlarged view of point B in FIG5.

[0068] FIG. 7 is a schematic structural diagram of the first box and the connecting member shown in FIG. 3 .

[0069] FIG8 is a cross-sectional view taken along line CC in FIG7 .

[0070] FIG9 is a partial enlarged view of point D in FIG8 .

[0071] FIG10 is an exploded schematic diagram of the first box and the connecting member shown in FIG7 .

[0072] FIG11 is a schematic structural diagram of the connecting member in FIG10 .

[0073] FIG12 is a schematic structural diagram of a connector provided in yet another embodiment of the present application.

[0074] FIG13 is a cross-sectional view taken along line EE in FIG12.

[0075] FIG14 is a schematic structural diagram of a battery provided in yet another embodiment of the present application.

[0076] FIG15 is a cross-sectional view taken along line FF in FIG14.

[0077] FIG16 is a partial enlarged view of point G in FIG15 .

[0078] FIG17 is an exploded schematic diagram of the first box in FIG15 .

[0079] FIG18 is a cross-sectional view of the plate in FIG17 .

[0080] FIG19 is a partial enlarged view of point H in FIG18 .

[0081] Among them, the figure marks in the figure are: 1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 100, battery cell; 200, battery box; 201, storage space; 210, first box body; 211, fixing portion; 2111, first connecting hole; 2112, mounting cavity; 212, connecting portion; 213, plate; 2131, plate body; 2132, bending structure; 21321, first bending section; 21322, second bending section; 21323, third bending section; 21324, fourth bending section, 21325, fifth bending section Bending section; 2133, first bending portion; 2134, second bending portion; 214, side frame strip; 2141, frame portion; 2142, side plate portion; 215, first closing plate; 216, second closing plate; 217, mounting beam; 218, first module beam; 219, second module beam; 220, connecting piece; 221, threaded hole; 222, main body; 223, raised portion; 2211, first threaded hole section; 2212, second threaded hole section; 230, bolt; 240, second box body; 241, second connecting hole; 250, sealing piece. DETAILED DESCRIPTION

[0082] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0083] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0084] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance, or to implicitly specify the quantity, specific order, or primary-secondary relationship of the technical features indicated. Therefore, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features.

[0085] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0086] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0087] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more (including two groups), and "multiple sheets" refers to two or more (including two sheets). "Several" means one or more, unless otherwise specifically defined.

[0088] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0089] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0090] In the description of the embodiments of this application, unless otherwise expressly specified or limited, when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0091] In this application, a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or battery pack. Some batteries may include a battery box that encloses one or more battery cells or multiple battery modules. The battery box prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells or battery modules.

[0092] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0093] Battery cells or battery modules are usually placed inside a battery box, and the size of the battery box directly determines the size of the battery; therefore, how to reduce the size of the battery box is also an important research topic for batteries; usually, the battery box includes a first box body and a second box body, the second box body cover is provided on the first box body, and a fixing portion is provided on the outer side of the first box body, and the fixing portion and the second box body are connected by bolts and nuts to enclose and form a receiving space for accommodating the battery cells; or, the battery includes a first box body, and a fixing portion is provided on the outer side of the first box body, and the fixing portion is fixed to a mounting fitting (for example: a crossbeam or longitudinal beam of a vehicle) by bolts and nuts to achieve mounting of the battery box.

[0094] However, the nut is a standard part and the size of the nut is a standard size. The size of the nut will also affect the size of the battery box. Therefore, how to optimize this part of the structure, reduce the size of the battery box, reduce the size of the battery, and increase the volume energy density of the battery is also an important research direction.

[0095] Based on this, an embodiment of the present application provides a battery box, in which a threaded hole is opened in the connecting part, and the threaded hole can be screwed with a bolt, so that the connecting part can replace the nut; at the same time, the connecting part can be made not according to the size of the nut, that is, the size of the connecting part can be smaller than the size of the nut, thereby reducing the size of the battery box, reducing the size of the battery, and improving the volume energy density of the battery.

[0096] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in one embodiment of the present application.

[0097] Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle 1000 provided in one embodiment of the present application.

[0098] The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1100 is provided inside the vehicle 1000. The battery 1100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 1100 may be used to power the vehicle 1000. For example, the battery 1100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery 1100 to power the motor 1300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0099] In one embodiment of the present application, the battery 1100 can not only serve as the operating power source of the vehicle 1000, but also serve as the 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 Figures 2 to 6. Figure 2 is a schematic diagram of the structure of a battery provided in another embodiment of the present application. Figure 3 is an exploded schematic diagram of the battery shown in Figure 2. Figure 4 is a schematic diagram of the structure of the battery shown in Figure 2. Figure 5 is a cross-sectional view taken along line AA in Figure 4. Figure 6 is a partial enlarged view of point B in Figure 5.

[0101] As an embodiment of a battery 1100, the battery 1100 includes a battery box 200 and a battery cell 100, wherein the battery cell 100 is accommodated in the battery box 200. The battery box 200 is used to provide a receiving space 201 for the battery cell 100.

[0102] In the battery 1100 , there may be multiple battery cells 100 , and the multiple battery cells 100 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 100 are connected in both series and in parallel.

[0103] In one embodiment, multiple battery cells 100 can be directly connected in series, parallel, or hybrid, and then the entire battery cell 100 can be housed in the battery box 200. Of course, the battery 1100 can also be in the form of a battery module 1100, in which multiple battery cells 100 are first connected in series, parallel, or hybrid, and then the multiple battery modules 1100 are further connected in series, parallel, or hybrid to form an entire battery cell 1100 and housed in the box. The battery 1100 can also include other structures, such as a busbar component for electrically connecting the multiple battery cells 100.

[0104] Each battery cell 100 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 100 may be cylindrical, flat, rectangular, or in other shapes.

[0105] In one embodiment of the present application, a battery box 200 is provided, which includes a first box body 210 and a connecting member 220. The first box body 210 is provided with a receiving space 201 for accommodating a battery cell 100. The side of the first box body 210 facing away from the receiving space 201 is provided with a fixing portion 211, and the fixing portion 211 is provided with a first connecting hole 2111; the connecting member 220 is provided with a threaded hole 221 for screwing with a bolt 230, and the first connecting hole 2111 is connected to the threaded hole 221, so that the bolt 230 passes through the first connecting hole 2111 and is screwed with the threaded hole 221.

[0106] The battery box 200 can adopt various structures.

[0107] In one embodiment, the battery box 200 may include a first box body 210 and a second box body 240 . The first box body 210 and the second box body 240 cover each other. The first box body 210 and the second box body 240 jointly define a receiving space 201 for accommodating the battery cells 100 . The first box body 210 may be a plate-like structure, and the second box body 240 may be a hollow structure with an opening. The first box body 210 covers the open side of the second box body 240, so that the first box body 210 and the second box body 240 jointly define the receiving space 201. Alternatively, the second box body 240 may be a plate-like structure, and the first box body 210 may be a hollow structure with an opening. The second box body 240 covers the open side of the first box body 210, so that the first box body 210 and the second box body 240 jointly define the receiving space 201. Alternatively, the first box body 210 and the second box body 240 may both be hollow structures with an opening at one end. The open side of the first box body 210 and the open side of the second box body 240 are butted together, so that the first box body 210 and the second box body 240 jointly define the receiving space 201. Of course, the battery box 200 formed by the first box body 210 and the second box body 240 may be of various shapes, such as a cylinder, a cuboid, etc.

[0108] In one embodiment, the battery box 200 may not include the second box body 240 , and the first box body 210 may have a receiving space 201 formed therein. The first box body 210 may be directly fixed in the electrical device through necessary structures.

[0109] The first box body 210 may be an integral structure or a structure formed by assembling a plurality of independently formed sub-components.

[0110] The second box body 240 may be an integral structure or a structure formed by splicing together a plurality of independently formed sub-components.

[0111] The fixing portion 211 may refer to the portion where the first box body 210 is connected to the second box body 240 via a screw, or may refer to the portion where the first box body 210 is connected to a mounting fitting (for example, a crossbeam or longitudinal beam of the vehicle 1000) via a screw; the fixing portion 211 is located on the side of the first box body 210 facing away from the accommodating space 201, that is, the fixing portion 211 is located outside the battery box 200 to facilitate connection.

[0112] The first connection hole 2111 may refer to a hole structure of the fixing portion 211 for the bolt 230 to pass through.

[0113] The connecting member 220 may refer to a component that is connected in conjunction with the bolt 230; the connecting member 220 is provided with a threaded hole 221, and the threaded hole 221 may refer to a hole structure in which a thread is provided on the inner wall of the hole; the threaded hole 221 and the first connecting hole 2111 are arranged relative to each other, that is, the threaded hole 221 and the first connecting hole 2111 are arranged coaxially, so that the screw can be screwed into the threaded hole 221 after passing through the first connecting hole 2111, thereby realizing the connection.

[0114] As an example, when the fixing part 211 is connected to the second box body 240, the second box body 240 is provided with a second connecting hole 241. After the screw passes through the first connecting hole 2111 and the second connecting hole 241, it is screwed to the threaded hole 221 of the connecting member 220 to realize the fixed connection between the first box body 210 and the second box body 240.

[0115] As an example, when the fixing part 211 is connected to the mounting fitting (for example, the crossbeam or longitudinal beam of the vehicle 1000), the mounting fitting is provided with a third connecting hole. After the screw passes through the first connecting hole 2111 and the third connecting hole, it is screwed to the threaded hole 221 of the connecting part 220, thereby realizing the mounting of the battery box 200.

[0116] In the battery box 200 of the embodiment of the present application, the connecting member 220 is provided with a threaded hole 221 that cooperates with the bolt 230, so that the connecting member 220 can replace the nut to be connected to the bolt 230; at the same time, the connecting member 220 may not be designed according to the standard size of the nut, that is, the size of the connecting member 220 may be designed to be smaller than the standard size of the nut, saving space on the side of the first box body 210 facing the fixing part 211, thereby reducing the size of the battery box 200, reducing the size of the battery 1100, and improving the volume energy density of the battery 1100.

[0117] In another embodiment of the present application, the connecting member 220 is a steel member, an aluminum alloy member, or a copper alloy member.

[0118] In one embodiment, the connector 220 is made of steel. The material of the connector 220 may be, but is not limited to, carbon steel (e.g., 45# steel, Q345) or stainless steel (e.g., SUS304, SUS316). Steel has excellent structural strength. Therefore, while ensuring the connection strength between the bolt 230 and the connector 220, the connector 220 can be made smaller, further saving space occupied by the first housing 210, reducing the size of the battery box 200, and increasing the volumetric energy density of the battery 1100.

[0119] In one embodiment, the connector 220 is an aluminum alloy, i.e., the connector 220 is made of an aluminum alloy, such as 6061 aluminum alloy, 7075 aluminum alloy, 2024 aluminum alloy, etc. Aluminum alloy has good structural strength. Therefore, while ensuring the connection strength between the bolt 230 and the connector 220, the size of the connector 220 can be made smaller, further saving the space occupied by the first box 210, reducing the size of the battery box 200, and improving the volumetric energy density of the battery 1100.

[0120] In one embodiment, the connector 220 is a copper alloy, i.e., the connector 220 is made of a copper alloy, such as brass, bronze, nickel silver, or a structural copper alloy (e.g., T2Y2). Copper alloys have excellent structural strength. Therefore, while maintaining the required connection strength between the bolt 230 and the connector 220, the connector 220 can be made smaller, further saving space occupied by the first housing 210, reducing the size of the battery case 200, and increasing the volumetric energy density of the battery 1100.

[0121] By adopting the technical solution of this embodiment, on the basis of satisfying the connection strength between the bolt 230 and the connector 220, the size of the connector 220 can be made smaller, further saving the space occupied by the first box body 210, reducing the size of the battery box 200, and improving the volume energy density of the battery 1100.

[0122] Please refer to Figures 7 to 10. Figure 7 is a schematic structural diagram of the first housing and connector shown in Figure 3. Figure 8 is a cross-sectional view taken along line CC in Figure 7. Figure 9 is a partial enlarged view of point D in Figure 8. Figure 10 is an exploded schematic diagram of the first housing and connector shown in Figure 7.

[0123] In another embodiment of the present application, the receiving space 201 and the fixing portion 211 are respectively located on two opposite sides of the first box body 210 along the first direction Z.

[0124] The first direction Z may refer to the distribution direction of the receiving space 201 and the fixing portion 211 ; the receiving space 201 is located on one side of the first box body 210 along the first direction Z, and the fixing portion 211 is located on the other side of the first box body 210 along the first direction Z.

[0125] By adopting the technical solution of this embodiment, the dimension L of the connector 220 in the first direction Z can be designed to be smaller, saving space in the first direction Z, so that the battery 1100 can be used in electrical devices with stricter requirements on the dimension in the first direction Z.

[0126] In some embodiments, the size of the battery 1100 along the first direction Z is smaller than the size of the battery 1100 along the second direction X, and the size of the battery 1100 along the first direction Z is larger than the size of the battery 1100 along the third direction Y. Optionally, the first direction Z, the second direction X, and the third direction Y are perpendicular to each other; for example, the first direction Z may be the height direction of the battery 1100, the second direction X may be the width direction of the battery 1100, and the third direction Y may be the length direction of the battery 1100.

[0127] The first direction Z is the height direction of the battery 1100 , which can save space in the height direction of the battery 1100 and make the battery 1100 suitable for a battery pack or electrical device that has strict requirements on the height dimension.

[0128] In another embodiment of the present application, the axis of the first connection hole 2111 is parallel to the second direction X, and the first direction Z is perpendicular to the second direction X.

[0129] By adopting the technical solution of this embodiment, the bolt 230 passes through the first connecting hole 2111 along the second direction X and is screwed into the threaded hole 221; and the second direction X is perpendicular to the first direction Z, and the bolt 230 can be installed on the other side of the first box body 210 along the first direction Z to facilitate the installation of the bolt 230.

[0130] In one embodiment, the first direction Z is the height direction of the battery 1100 , the second direction X is the width direction of the battery 1100 , and the bolts 230 are installed from the side of the battery 1100 along the width direction, and the installation operation is simple and convenient.

[0131] In another embodiment of the present application, the nominal diameter of the threaded hole 221 is D, and the dimension of the connecting member 220 in the first direction Z is L, wherein 1.1≤L / D≤2.

[0132] The nominal diameter D of the threaded hole 221 can be the maximum diameter of the thread. The nominal diameter D of the threaded hole 221 can be measured using a thread gauge. A thread gauge is a tool specifically designed to measure the diameter of a threaded hole 221 and is typically available in a variety of sizes. When using the gauge, screw it into the threaded hole 221, ensuring it rotates freely and ensuring that the tip of the gauge contacts the bottom of the hole. Based on the size of the thread gauge, the nominal diameter D of the threaded hole 221 can be determined.

[0133] The dimension L of the connecting member 220 in the first direction Z may refer to the distance between the two opposite end faces of the connecting member 220 in the first direction Z; if the end face of the connecting member 220 along the first direction Z is a plane, the measurement is based on the plane; if the end face of the connecting member 220 along the first direction Z is formed with a convex portion and / or a concave portion, the measurement is based on the plane area of ​​the end face of the connecting member 220 along the first direction Z.

[0134] When the bolt 230 passes through the first connecting hole 2111 along the second direction X and is threadedly connected to the nut, the maximum dimension of the nut in the first direction Z is equal to the opposite side dimension of the nut; however, the ratio between the opposite side dimension of the nut and the nominal diameter D of the threaded hole 221 of the nut is usually greater than 2, and the nut requires a larger space on the side of the first box body 210 along the first direction Z.

[0135] 1.1≤L / D≤2. It can be understood that when L / D≥1.1, the side of the connecting member 220 along the first direction Z has a certain structural strength, thereby meeting the connection requirements; L / D≤2 makes the size of the connecting member 220 in the first direction Z smaller than the size of the nut in the first direction Z, achieving a space-saving effect and reducing the size of the first box body 210.

[0136] By adopting the technical solution of this embodiment, the design of 1.1≤L / D≤2 can take into account both the reliability of the connection of the connector 220 and the effect of saving space, thereby improving the reliability of use and the volume energy density of the battery 1100.

[0137] In another embodiment of the present application, 1.2≤L / D≤1.7.

[0138] L / D≥1.2, the side of the connecting member 220 along the first direction Z has good structural strength, and the connection reliability of the connecting member 220 is better; L / D≤1.7, so that the size of the connecting member 220 in the first direction Z is much smaller than the size of the nut in the first direction Z, the space saving effect is better, and the size of the first box body 210 can be further reduced.

[0139] By adopting the technical solution of this embodiment, the design of 1.2≤L / D≤1.7 can better balance the reliability of the connection of the connector 220 and the effect of saving space, and better improve the reliability of the use and the volume energy density of the battery 1100.

[0140] In one embodiment, the value of L / D can be, but is not limited to, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, or 2.

[0141] Please refer to FIG11 , which is a schematic structural diagram of the connecting piece in FIG10 .

[0142] In another embodiment of the present application, the connecting member 220 is a long strip structure extending along the third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0143] The connector 220 extends along a third direction Y. The dimension of the connector 220 in the third direction Y is greater than the dimension L of the connector 220 in the first direction Z. The dimension of the connector 220 in the third direction Y is greater than the dimension of the connector 220 in the second direction X. In one embodiment, the third direction Y may be the length direction of the connector 220, the second direction X may be the width direction of the connector 220, and the first direction Z may be the height direction of the connector 220.

[0144] By adopting the technical solution of this embodiment, the connecting member 220 has a long strip structure, so that the connecting member 220 has a larger size in the third direction Y, the structural reliability of the connecting member 220 is good, and the reliability of the connection with the bolt 230 is improved; in addition, the connecting member 220 can be provided with multiple bolt 230 holes in the third direction Y to improve the reliability of the connection with the second box body 240 or the mounting fitting.

[0145] In another embodiment of the present application, there are multiple threaded holes 221 , and the multiple threaded holes 221 are arranged at intervals along the third direction Y.

[0146] The number of threaded holes 221 can be, but is not limited to, two, three, four, or five.

[0147] By adopting the technical solution of this embodiment, the connecting member 220 can be screwed to multiple threaded holes 221 through multiple bolts 230, so as to realize multi-point connection between the first box body 210 and the second box body 240 or multi-point connection between the first box body 210 and the mounting fitting, thereby improving the connection reliability and the reliability of the battery 1100.

[0148] In another embodiment of the present application, the fixing portion 211 is configured with a mounting cavity 2112 for communication with the first connecting hole 2111 , and the connecting member 220 is located in the mounting cavity 2112 .

[0149] The fixing portion 211 is a hollow structure. The cavity inside the fixing portion 211 forms an installation cavity 2112 . The installation cavity 2112 can provide an installation space for the connector 220 .

[0150] By adopting the technical solution of this embodiment, the connector 220 is located in the installation cavity 2112 of the fixing portion 211, which can fully utilize the space inside the fixing portion 211, which is beneficial to reducing the size of the first box body 210 and improving the volume energy density of the battery 1100; in addition, the fixing portion 211 can also protect the connector 220 and improve the reliability of the connection.

[0151] In another embodiment of the present application, the connecting member 220 is bonded to the cavity wall of the installation cavity 2112 .

[0152] The connector 220 is bonded to the wall of the mounting cavity 2112 by structural adhesive. The structural adhesive may be, but is not limited to, epoxy resin structural adhesive, polyurethane structural adhesive, acrylic structural adhesive, or silicone structural adhesive.

[0153] In one embodiment, the connecting member 220 can be bonded to the cavity wall surface where the first connecting hole 2111 is installed. Of course, in other embodiments, the connecting member 220 can also be bonded to other surfaces of the installation cavity 2112.

[0154] By adopting the technical solution of this embodiment, the connecting member 220 is fixed in the installation cavity 2112 by bonding. On the one hand, the positioning of the connecting member 220 is achieved, and the screwing operation of the bolt 230 and the threaded hole 221 is simpler and faster; on the other hand, the bonding fixation method is adopted, and the fixing operation is simple, which is conducive to improving assembly efficiency.

[0155] In another embodiment of the present application, at least one of the two opposite surfaces of the connecting member 220 along the first direction Z abuts against the cavity wall of the mounting cavity 2112 .

[0156] One surface of the connecting member 220 along the first direction Z abuts against the cavity wall of the installation cavity 2112; or, another surface of the connecting member 220 along the first direction Z abuts against the cavity of the installation cavity 2112; or, both opposite surfaces of the connecting member 220 along the first direction Z abut against the cavity wall of the installation cavity 2112.

[0157] By adopting the technical solution of this embodiment, at least one of the two opposite surfaces of the connecting member 220 along the first direction Z abuts against the cavity wall of the installation cavity 2112, which can save space of the installation cavity 2112 in the first direction Z, reduce the size of the first box body 210 in the first direction Z, reduce the size of the battery 1100 in the first direction Z, and improve the volume energy density of the battery 1100.

[0158] 12 and 13 , FIG12 is a schematic structural diagram of a connector provided by another embodiment of the present application. FIG13 is a cross-sectional view along line EE in FIG12 .

[0159] In another embodiment of the present application, the threaded hole 221 includes a first threaded hole section 2211 and a second threaded hole section 2212 that are connected to each other; the connecting member 220 includes a main body 222 and a protrusion 223 that are connected to each other, the protrusion 223 protrudes from the surface of the main body 222, the main body 222 is constructed with a first threaded hole section 2211, and the protrusion 223 is constructed with a second threaded hole section 2212.

[0160] The threaded hole 221 is divided into two sections along the axial direction, one of which is the first threaded hole section 2211, and the other is the second threaded hole section 2212; the connecting piece 220 is also divided into two parts along the axial direction of the threaded hole 221, one of which is the main body 222, and the other is the raised portion 223, and the raised portion 223 protrudes from the surface of the main body 222; the first threaded hole section 2211 is located in the main body 222, and the second threaded hole section 2212 is located in the raised portion 223, and the raised portion 223 surrounds the second threaded hole section 2212. The shape of the raised portion 223 can refer to various shapes, such as: circular, elliptical, quadrilateral, etc. In one embodiment, the protrusion 223 may be located on a side of the body 222 facing away from the first connection hole 2111, the protrusion 223 protruding from the surface of the body 222 facing the first connection hole 2111, the first threaded hole section 2211 penetrates the body 222 along the second direction X, the second threaded hole section 2212 may penetrate the protrusion 223 along the second direction X, or may not penetrate the protrusion 223 along the second direction X. In one embodiment, the protrusion 223 may also be located on a side of the body 222 facing away from the first connection hole 2111, the protrusion 223 protruding from the surface of the body 222 facing the first connection hole 2111, the second threaded hole section 2212 penetrates the protrusion 223 along the second direction X, and the first threaded hole section 2211 may penetrate the body 222 along the second direction X, or may not penetrate the body 222.

[0161] In one embodiment, when the connecting member 220 is provided with a plurality of threaded holes 221 , the main body 222 is in an elongated structure, and the number of the protrusions 223 is multiple, and the protrusions 223 are arranged in a one-to-one correspondence with the threaded holes 221 .

[0162] By adopting the technical solution of this embodiment, the provision of the protrusion 223 can reduce the material accumulation of the connecting member 220, which is conducive to achieving a lightweight design.

[0163] In another embodiment of the present application, the height of the protrusion 223 protruding from the body 222 is h, the nominal diameter of the threaded hole 221 is D, and 0.5≤h / D≤2.

[0164] The height h of the protrusion 223 protruding from the body 222 may refer to the distance between the surface of the protrusion 223 facing away from the body 222 and the surface of the body 222 facing the protrusion 223 .

[0165] 0.5≤h / D≤2. It can be understood that h / D≥0.5, so that the height h of the protrusion 223 protruding from the main body 222 is reasonable, the protrusion 223 is not easily damaged, and the structural strength of the connecting member 220 is good; h / D≤2, so that the height h of the protrusion 223 protruding from the main body 222 is not too large, which causes the size of the battery box 200 to be too large.

[0166] By adopting the technical solution of the embodiment and the design of 0.5≤h / D≤2, the connector 220 can take into account both the reliability of the connection and the size of the battery box 200.

[0167] In another embodiment of the present application, 0.7≤h / D≤1.5.

[0168] 0.7≤h / D≤1.5. It can be understood that when h / D≥0.7, the height h of the protrusion 223 protruding from the main body 222 is more reasonable, the protrusion 223 is less likely to be damaged, and the structural strength of the connecting member 220 is better; when h / D≤1.5, the height h of the protrusion 223 protruding from the main body 222 is more reasonable, and the size of the battery box 200 is also more reasonable.

[0169] By adopting the technical solution of the embodiment and the design of 0.7≤h / D≤1.5, the connector 220 can better balance the reliability of the connection and the size of the battery box 200.

[0170] The value of h / D can be, but is not limited to, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, and 2.

[0171] In another embodiment of the present application, the height of the protrusion 223 protruding from the body 222 is h, and 0.5 millimeters (mm) ≤ h / D ≤ 50 mm.

[0172] 0.5mm≤h / D≤50mm. It can be understood that h≥0.5mm, so that the height h of the protrusion 223 protruding from the main body 222 is reasonable, the protrusion 223 is not easily damaged, and the structural strength of the connecting piece 220 is good; h≤50mm, so that the height h of the protrusion 223 protruding from the main body 222 is not too large, which causes the size of the battery box 200 to be too large.

[0173] By adopting the technical solution of the embodiment and the design of 0.5mm≤h / D≤50mm, the connector 220 can take into account both the reliability of the connection and the size of the battery box 200.

[0174] In another embodiment of the present application, 5 mm ≤ h / D ≤ 30 mm.

[0175] 5mm≤h / D≤30mm. It can be understood that h≥5mm makes the height h of the protrusion 223 protruding from the main body 222 more reasonable, the protrusion 223 is less likely to be damaged, and the structural strength of the connecting part 220 is better; h≤30mm makes the height h of the protrusion 223 protruding from the main body 222 more reasonable, and the size of the battery box 200 is also more reasonable.

[0176] By adopting the technical solution of the embodiment and the design of 5mm≤h / D≤30mm, the connector 220 can better balance the reliability of the connection and the size of the battery box 200.

[0177] The value of h can be, but is not limited to, 0.5 mm, 1 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, or 50 mm.

[0178] In another embodiment of the present application, the first box body 210 further includes a side frame bar 214 , which is connected to an edge of the plate 213 , and at least a portion of the side frame bar 214 forms the fixing portion 211 .

[0179] The side frame bar 214 may refer to a component connected to the edge of the plate 213 ; the side frame bar 214 may be made of metal materials such as aluminum alloy, copper alloy, etc.

[0180] The portion of the side frame strip 214 located on the side of the plate 213 facing away from the receiving space 201 serves as the fixing portion 211 .

[0181] A portion of the side frame strip 214 may be located on the side of the plate 213 facing away from the receiving space 201. As an example, the side frame strip 214 includes a frame portion 2141 and a side panel portion 2142. One side of the frame portion 2141 is connected to the edge of the plate 213, and the side panel portion 2142 is connected to the other side of the frame portion 2141. The side panel portion 2142 protrudes from the side of the plate toward the receiving space 201. The frame portion 2141 is a hollow structure, and the hollow cavity of the frame portion 2141 is an installation cavity 2112. The side wall of the frame portion 2141 facing away from the plate 213 is provided with a first connecting hole 2111.

[0182] The side frame strips 214 may also be entirely located on the sides of the receiving space 201 .

[0183] By adopting the technical solution of this embodiment, the side frame strip 214 has good structural strength, which is beneficial to improving the connection reliability between the first box body 210 and the second box body 240 or improving the connection reliability between the first box body 210 and the mounting fitting.

[0184] In another embodiment of the present application, the battery box 200 further includes a second box body 240 . The second box body 240 is connected to the fixing portion 211 . The first box body 210 and the second box body 240 are arranged to form a receiving space 201 .

[0185] By adopting the technical solution of this embodiment, the battery box 200 adopts the structure of the first box body 210 and the second box body 240, which has a simple structure and is easy to process and manufacture.

[0186] In conjunction with Figures 14 to 19, Figure 14 is a schematic structural diagram of a battery provided in yet another embodiment of the present application. Figure 15 is a cross-sectional view taken along line FF in Figure 14. Figure 16 is a partial enlarged view of point G in Figure 15. Figure 17 is an exploded schematic diagram of the first housing in Figure 15. Figure 18 is a cross-sectional view of the plate in Figure 17. Figure 19 is a partial enlarged view of point H in Figure 18.

[0187] In another embodiment of the present application, the first box body 210 includes a plate 213, the accommodating space 201 and the fixing portion 211 are respectively located on two opposite sides of the plate 213 along the first direction Z; the edge of the plate 213 is bent to form a bending structure 2132, and at least a portion of the bending structure 2132 forms the fixing portion 211.

[0188] The plate 213 may refer to a plate-shaped component in the first housing 210 ; the receiving space 201 and the fixing portion 211 are located on opposite sides of the plate 213 along the first direction Z. In one embodiment, the receiving space 201 is located above the plate 213 , and the fixing portion 211 is located below the plate 213 . The plate 213 supports the battery cells 100 and may serve as the bottom plate of the battery 1100 . In another embodiment, the receiving space 201 is located below the plate 213 , and the fixing portion 211 is located above the plate 213 . The plate 213 is located above the battery cells 100 and may serve as the top plate of the battery case 200 .

[0189] The edge of the plate 213 is bent to form a bent structure, and a portion of the bent structure located on the side of the plate 213 facing away from the receiving space 201 is the fixing portion 211 .

[0190] The bent structure may be partially located on the side of the plate 213 facing away from the receiving space 201 . As an example, the edge of the plate 213 is bent so that the plate 213 forms a plate body 2131 and a bending structure; the bending structure includes a first bending section 21321, a second bending section 21322, a third bending section 21323, a fourth bending section 21324 and a fifth bending section 21325 connected in sequence; the first bending section 21321 is bent from the edge of the plate body 2131 toward the receiving space 201, and the first bending section 21321 is perpendicular to the plate body 2131; the second bending section 21322 is in contact with the first bending section 21321, and the second bending section 21322 is located on the side of the first bending section 21321 facing away from the plate body 2131; the third bending section 21323 is parallel to the plate body 2131, and the third bending section 21323 is spaced apart from the surface of the plate body 2131 facing away from the receiving space 201, and the fifth bending section 21325 is spaced apart from the surface of the plate body 2131 facing away from the receiving space The third bending section 21323 is arranged parallel to the fourth bending section 21324 at intervals; the fifth bending section 21325 is attached to the surface of the plate body 2131 facing away from the receiving space 201; wherein, the second bending section 21322 is located on the side of the plate body 2131 facing away from the receiving space 201, the third bending section 21323, the fourth bending section 21324 and the fifth bending section 21325 form a fixing portion 211, the surface of the plate body 2131 facing away from the receiving space 201, the second bending section 21322 is located on the side of the plate body 2131 facing away from the receiving space 201, the third bending section 21323 and the fourth bending section 21324 are jointly arranged to form an installation cavity 2112, and the first connecting hole 2111 is arranged on the part of the second bending section 21322 located on the side of the plate body 2131 facing away from the receiving space 201.

[0191] The bending structure can also be entirely located on the side of the plate 213 facing away from the receiving space 201; as an example, the edge of the plate 213 is bent directly away from the receiving space 201 to form the fixing portion 211; of course, the plate 213 can also have other bending methods in the bending structure on the side of the plate 213 facing away from the receiving space 201, which is not limited here.

[0192] By adopting the technical solution of this embodiment, the plate 213 is bent to form the fixing portion 211. On the one hand, there is no need to set a connecting structure, which can reduce parts and save space, and is beneficial to improving the volume energy density of the battery 1100; at the same time, the bending radius of the bending method can be set smaller, which is also beneficial to saving space and further improving the volume energy density of the battery 1100; on the other hand, the bending manufacturing process is simple, which is beneficial to improving the production efficiency of the battery 1100.

[0193] In another embodiment of the present application, the second box body 240 is provided with a second connection hole 241 for the bolt 230 to pass through.

[0194] The second connection hole 241 may refer to a hole structure of the second housing 240 for passing the bolt 230. After passing through the second connection hole 241 and the first connection hole 2111, the bolt 230 is screwed into the bolt 230 hole of the connector 220, thereby connecting the first housing 210 and the second housing 240.

[0195] By adopting the technical solution of this embodiment, the second box body 240 can directly use the bolts 230 and the threaded holes 221 of the connecting piece 220 to realize the connection between the first box body 210 and the second box body 240. This does not require the setting of other connecting structures, which is beneficial to reducing parts, saving space, and also beneficial to improving the volume energy density of the battery 1100.

[0196] In another embodiment of the present application, the fixing portion 211 is connected to the connecting portion 212, the connecting portion 212 protrudes from the surface of the plate 213 facing the receiving space 201, the connecting portion 212 is located in the second box body 240, and a sealing member 250 is provided between the connecting portion 212 and the inner wall of the second box body 240.

[0197] The connecting portion 212 may refer to the portion of the first housing 210 that protrudes from the plate 213 toward the receiving space 201, i.e., the connecting portion 212 is inserted into the second housing 240. In one embodiment, as shown in FIG16 , the connecting portion 212 may refer to the first bent section 21321 and the second bent section 21322 described above, located on the side of the plate portion 2131 facing the receiving space 201. In one embodiment, as shown in FIG6 , the connecting portion 212 may also refer to the side panel portion 2142 described above.

[0198] The seal 250 is a mechanical component used to prevent gas or liquid leakage. The seal 250 can be of various types, such as: O-ring, gasket, sealant, sealing strip, etc.

[0199] By adopting the technical solution of this embodiment, the seal 250 is filled between the connecting portion 212 and the second box body 240. On the one hand, the sealing performance between the first box body 210 and the second box body 240 can be increased, thereby improving the reliability of the battery 1100. In addition, the setting of the connecting portion 212 can also increase the connection area between the first box body 210 and the second box body 240, thereby facilitating the setting of the seal 250 and achieving a better sealing effect.

[0200] In another embodiment of the present application, the plate 213 is provided with fixing portions 211 on two opposite sides along the second direction X, and the first direction Z intersects with the second direction X.

[0201] For example, the second direction X may refer to the width direction of the plate 213 , and two opposite sides of the plate 213 along the width direction are bent to obtain two first bent portions.

[0202] By adopting the technical solution of this embodiment, fixing portions 211 are provided on both opposite sides of the plate 213, which can increase the connection points between the first box body 210 and the second box body 240 and improve the reliability of the connection between the first box body 210 and the second box body 240; or, the mounting points of the battery box 200 can be increased to improve the reliability of the mounting of the battery 1100.

[0203] In another embodiment of the present application, the first box body 210 also includes a first sealing plate 215 and a second sealing plate 216, one of the side portions of the two sides of the plate 213 relatively distributed along the third direction Y is connected to the first sealing plate 215, and the other side portion of the two sides of the plate 213 relatively distributed along the third direction Y is connected to the second sealing plate 216; the first sealing plate 215, the second sealing plate 216 and the plate 213 are jointly arranged to form a receiving space 201, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0204] The first sealing plate 215 and the second sealing plate 216 are located on the opposite side portions of the plate 213 along the third direction Y. The first sealing plate 215, the second sealing plate 216 and the plate 213 form a U-shaped structure. The second box body 240 is covered on the opening side of the U-shaped structure, thereby enclosing a receiving space 201. The second box body 240 also has a U-shaped structure to match the structure of the first box body 210. The opposite side walls of the second box body 240 are respectively connected to the two fixing parts 211 by bolts 230. The first sealing plate 215 and the second sealing plate 216 are covered on the opposite openings of the second box body 240 along the third direction Y. The first box body 210 and the second box body 240 are jointly enclosed to form a receiving space 201.

[0205] By adopting the technical solution of this embodiment, the first box body 210 has a simple structure and is easy to manufacture.

[0206] In one embodiment, the plate 213 is bent along the opposite sides of the third direction Y to form a first bending portion 2133 and a second bending portion 2134. The first bending portion 2133 and the second bending portion 2134 are located on the side of the plate 213 facing the receiving space 201. The first sealing plate 215 is welded to the first bending portion 2133, and the second sealing plate 216 is welded to the fourth sealing plate, thereby realizing a sealed connection between the first sealing plate 215, the second sealing plate 216 and the plate 213. In addition, during the welding process, the first sealing plate 215 can be inserted into the gap between the fixing portion 211 and the first bending portion 2133 for pre-positioning to facilitate subsequent welding connection. Similarly, the second sealing plate 216 can be inserted into the gap between the fixing portion 211 and the second bending portion 2134 for pre-positioning to facilitate subsequent welding connection.

[0207] In one embodiment, the first bending portion 2133 is located on the side of the plate 213 facing away from the receiving space 201, and the second bending portion 2134 is located on the side of the plate 213 facing the receiving space 201. The first sealing plate 215 is welded to the first bending portion 2133, and the second sealing plate 216 is welded to the fourth sealing plate, thereby realizing a sealed connection between the first sealing plate 215, the second sealing plate 216 and the plate 213; during the welding process, the first sealing plate 215 is adhered to the wall surface of the first bending portion 2133 for pre-positioning to facilitate subsequent welding connection; similarly, the second sealing plate 216 can be inserted into the gap between the fixing portion 211 and the second bending portion 2134 for pre-positioning to facilitate subsequent welding connection.

[0208] In another embodiment of the present application, the first box body 210 also includes a plurality of mounting beams 217 connected to the plate 213, the plurality of mounting beams 217 are located between the two mounting parts, and the plurality of mounting beams 217 are arranged at intervals along the third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0209] The mounting beams 217 may be beams connected to the plate 213 and spaced apart along the third direction Y. The mounting beams 217 may be fixed to the mounting fitting to enable mounting of the battery 1100. The number of mounting beams 217 may be, but is not limited to, two, three, four, or five. For example, the mounting beams 217 extend along the first direction Z, and three mounting beams 217 are spaced apart along the second direction X. The multiple mounting beams 217 may be spaced evenly or unevenly, depending on actual needs. In other embodiments, the mounting beams 217 may extend in other directions.

[0210] By adopting the technical solution of this embodiment, the provision of multiple mounting beams 217 can play a role in strengthening the structural strength of the plate 213, thereby improving the structural strength of the first box body 210, and facilitating improved reliability of the battery 1100 and the electrical device.

[0211] In another embodiment of the present application, a plurality of mounting beams 217 are located on a side of the plate 213 facing away from the receiving space 201 .

[0212] It is understandable that the mounting beam 217 is located outside the receiving space 201 .

[0213] By adopting the technical solution of this embodiment, the mounting beam 217 is located outside the receiving space 201 and does not occupy the space of the receiving space 201 , so that the receiving space 201 can accommodate more battery cells 100 , which is beneficial to improving the volume energy density of the battery 1100 .

[0214] In another embodiment of the present application, the first box body 210 also includes a first module beam 218 and a second module beam 219 for connecting to the battery cell 100. The first module beam 218 and the second module beam 219 are located in the receiving space 201. The first module beam 218 is connected to one of the two sides of the plate 213 that are relatively distributed along the third direction Y, and the second module beam 219 is connected to the other side of the two sides of the plate 213 that are relatively distributed along the third direction Y.

[0215] The two sides of the plate 213 that are relatively distributed along the third direction Y are both provided with module beams, one of which is the first module beam 218, and the other is the second module beam 219; the module beams are located in the receiving space 201, and the module beams are connected to the plate 213 to achieve the fixation of the module beams in the receiving space 201, and the module beams are connected to the battery cell 100, so that the module beams support and fix the battery cell 100, which is beneficial to improve the structural strength of the battery box 200 and improve the reliability of the battery 1100.

[0216] In another embodiment of the present application, along the third direction Y, the first mounting beam 217 is disposed opposite to the first module beam 218 , and / or the last mounting beam 217 is disposed opposite to the second module beam 219 .

[0217] Multiple mounting beams 217 are arranged in sequence along the third direction Y, the first mounting beam 217 is arranged opposite to the first module beam 218, the first mounting beam 217 and the first module beam 218 are located on opposite sides of the plate 213 along the first direction Z, and one side of the plate 213 along the third direction Y is clamped between the first mounting beam 217 and the first module beam 218, which can increase the structural strength of the first box 210 at the first module beam 218, which is beneficial to improving the structural strength of the first box 210; similarly, the last mounting beam 217 is arranged opposite to the second module beam 219, and the last mounting beam 217 and the second module beam 219 are located on opposite sides of the plate 213 along the first direction Z, and the other side of the plate 213 along the third direction Y can be clamped between the first mounting beam 217 and the second module beam 219, which can increase the structural strength of the first box 210 at the second module beam 219, which is beneficial to improving the structural strength of the first box 210.

[0218] In a possible embodiment, along the third direction Y, the first mounting beam 217 is arranged opposite to the first module beam 218 , which can increase the structural strength of the first box body 210 at the first module beam 218 , which is beneficial to improving the structural strength of the first box body 210 .

[0219] In a possible embodiment, along the third direction Y, the last mounting beam 217 is arranged opposite to the second module beam 219 , which can increase the structural strength of the first box body 210 at the second module beam 219 , which is beneficial to improving the structural strength of the first box body 210 .

[0220] In one possible embodiment, along the third direction Y, the first mounting beam 217 is arranged opposite to the first module beam 218, and the last mounting beam 217 is arranged opposite to the second module beam 219. This can increase the structural strength of the opposite two sides of the first box body 210 along the third direction Y, and can effectively improve the structural strength of the first box body 210.

[0221] By adopting the technical solution of this embodiment, the structural strength of the first box body 210 can be improved, which is beneficial to improving the reliability of the battery 1100.

[0222] In another embodiment of the present application, the plate 213 is a heat exchange member for exchanging heat with the battery cell 100 .

[0223] The heat exchange element may be a plate 213 used to exchange heat with the battery cell 100. The heat exchange element may have a heat exchange channel, through which a heat exchange medium flows while exchanging heat with the battery cell 100 to control the temperature of the battery cell 100 and improve the performance of the battery 1100. For example, the heat exchange element may be a cold plate.

[0224] By adopting the technical solution of this embodiment, the plate 213 is directly used as a heat exchange component, so there is no need to set up the plate 213 separately, which can reduce the number of parts, save space, and improve the volume energy density of the battery 1100.

[0225] In another embodiment of the present application, the fixing portion 211 is used to connect to the mounting fitting via a bolt 230 to achieve mounting of the battery box 200 .

[0226] The mounting fitting may be a component for mounting the battery 1100. The mounting fitting has a third connection hole. The bolt 230 passes through the third connection hole and the first connection hole, and then is threadedly connected to the threaded hole 221, thereby achieving a fixed connection between the battery box 200 and the mounting fitting, thereby mounting the battery 1100. For example, the mounting fitting may be a chassis component of the vehicle 1000, such as a crossbeam or a longitudinal beam.

[0227] By adopting the technical solution of this embodiment, the fixing portion 211 can be used as a mounting structure for the battery 1100, and the mounting of the battery 1100 is achieved through the bolt 230. The mounting operation is simple, which is conducive to improving the mounting efficiency.

[0228] The battery box 200 according to the embodiment of the present application is described below in conjunction with some embodiments.

[0229] Example 1

[0230] 2 to 11 , in this embodiment, the battery box 200 includes a first box body 210, a second box body 240, bolts 230, and connectors 220. The first box body 210 includes a plate 213, side frame bars 214, a first side panel, and a second side panel.

[0231] Along the first direction Z, the opposite sides of the plate 213 are respectively provided with a receiving space 201 and a fixing portion 211, and the fixing portion 211 is provided with a first connecting hole 2111; the connecting member 220 is provided with a threaded hole 221 for screwing with the bolt 230, and the first connecting hole 2111 is arranged opposite to the threaded hole 221, so that the bolt 230 passes through the first connecting hole 2111 and is screwed with the threaded hole 221.

[0232] The axis of the first connecting hole 2111 is parallel to the second direction X, and the first direction Z is perpendicular to the second direction X. The connecting member 220 is an elongated structure extending along the third direction Y. The first direction Z, the second direction X, and the third direction Y are perpendicular to each other. There are multiple threaded holes 221, and the multiple threaded holes 221 are spaced apart along the third direction Y.

[0233] The fixing portion 211 is configured with a mounting cavity 2112 for communication with the first connecting hole 2111 , and the connecting member 220 is located in the mounting cavity 2112 .

[0234] The connecting member 220 is bonded to the cavity wall of the installation cavity 2112 where the first connecting hole 2111 is provided.

[0235] Two opposite surfaces of the connecting member 220 along the first direction Z respectively abut against cavity wall surfaces of the mounting cavity 2112 that are opposite to each other along the first direction Z.

[0236] The plate 213 is connected to side frame strips 214 on opposite sides along the second direction X; the side frame strips 214 include a frame portion 2141 and a side panel portion 2142, one side of the frame portion 2141 is connected to the edge of the plate 213, and the side panel portion 2142 is connected to the other side of the frame portion 2141, and the side panel portion 2142 protrudes from the side of the plate toward the receiving space 201; the frame portion 2141 is a hollow structure, and the hollow cavity of the frame portion 2141 is the installation cavity 2112, and the side wall of the frame portion 2141 facing away from the plate 213 is provided with a first connecting hole 2111.

[0237] The second box body 240 is respectively provided with second connecting holes 241 on the opposite sides along the second direction X. The bolt 230 passes through the second connecting hole 241 and the first connecting hole 2111, and is then screwed into the threaded hole 221; the first box body 210, the plate 213 and the side frame strip 214 are arranged to form a receiving space 201; the side panel portion 2142 is located in the second box body 240, and a sealing member 250 is provided between the side panel portion 2142 and the inner wall surface of the second box body 240.

[0238] The first sealing plate 215 and the second sealing plate 216 are respectively fixed on the opposite sides of the plate 213 along the third direction Y, the first bending portion 2133 is located on the side of the plate 213 facing away from the receiving space 201, and the second bending portion 2134 is located on the side of the plate 213 facing the receiving space 201. The first sealing plate 215 is welded to the first bending portion 2133, and the second sealing plate 216 is welded to the fourth sealing plate, thereby realizing a sealed connection between the first sealing plate 215, the second sealing plate 216 and the plate 213. The first closing plate 215, the second closing plate 216, the two side frame strips 214 and the plate 213 together form a U-shaped structure. The second box body 240 is covered on the open side of the U-shaped structure, thereby enclosing a receiving space 201. The second box body 240 also has a U-shaped structure to match the structure of the first box body 210. The opposite side walls of the second box body 240 are respectively connected to the two side frame strips 214 by bolts 230. The first closing plate 215 and the second closing plate 216 are covered at the two opposite openings of the second box body 240 along the third direction Y. The first box body 210 and the second box body 240 together enclose a receiving space 201.

[0239] The first box body 210 further includes a plurality of mounting beams 217 connected to the plate 213 . The plurality of mounting beams 217 are located between the two mounting portions. The plurality of mounting beams 217 are spaced apart along the third direction Y. The first direction Z, the second direction X, and the third direction Y are perpendicular to each other.

[0240] The first box body 210 also includes a first module beam 218 and a second module beam 219 for connecting to the battery cell 100. The first module beam 218 and the second module beam 219 are located in the receiving space 201. The first module beam 218 is connected to one of the two sides of the plate 213 that are relatively distributed along the third direction Y, and the second module beam 219 is connected to the other side of the two sides of the plate 213 that are relatively distributed along the third direction Y.

[0241] Along the third direction Y, the first mounting beam 217 is disposed opposite to the first module beam 218 , and the last mounting beam 217 is disposed opposite to the second module beam 219 .

[0242] Example 2

[0243] As shown in Figures 14 to 19, the difference between this embodiment and the first embodiment is that the edge of the plate 213 is bent so that the plate 213 forms a plate body 2131 and a bending structure; the bending structure includes a first bending section 21321, a second bending section 21322, a third bending section 21323, a fourth bending section 21324 and a fifth bending section 21325 connected in sequence; the first bending section 21321 is connected from the plate body 2 The edge of 131 is bent toward the receiving space 201, and the first bending section 21321 is perpendicular to the plate body 2131; the second bending section 21322 is in contact with the first bending section 21321, and the second bending section 21322 is located on the side of the first bending section 21321 facing away from the plate body 2131; the third bending section 21323 is parallel to the plate body 2131, and the third bending section 21323 and the plate body 2131 are facing away from the receiving space 201, the surface of the third bending section 21323 and the fourth bending section 21324 are arranged in parallel and spaced apart; the fifth bending section 21325 is attached to the surface of the plate body 2131 facing away from the receiving space 201; wherein, the second bending section 21322 is located on the side of the plate body 2131 facing away from the receiving space 201, the third bending section 21323, the fourth bending section 21324 and the fifth bending section 21325 form a fixing portion 211, the surface of the plate body 2131 facing away from the receiving space 201, the second bending section 21322 is located on the side of the plate body 2131 facing away from the receiving space 201, the third bending section 21323 and the fourth bending section 21324 are jointly surrounded to form an installation cavity 2112, and the first connecting hole 2111 is provided in the part of the second bending section 21322 located on the side of the plate body 2131 facing away from the receiving space 201.

[0244] Example 3

[0245] As shown in Figures 12 and 13, the difference between this embodiment and Examples 1 and 2 is that: the threaded hole 221 includes a first threaded hole segment 2211 and a second threaded hole segment 2212 distributed and connected along the second direction X; the connecting member 220 includes a main body 222 and a raised portion 223 distributed and connected along the second direction X, the raised portion 223 protrudes from the surface of the main body 222, the main body 222 is constructed with a first threaded hole segment 2211, and the raised portion 223 is constructed with a second threaded hole segment 2212.

[0246] According to one embodiment of the present application, in combination with FIG. 2 and FIG. 3 , the embodiment of the present application further provides a battery 1100 , including the battery box 200 as described in the above embodiment.

[0247] According to one embodiment of the present application, in combination with FIG1 , the embodiment of the present application further provides an electric device, including a battery 1100 as described in the above embodiment.

[0248] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0249] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery box, wherein: include: A first box body is provided with a receiving space for accommodating a battery cell, a side of the first box body facing away from the receiving space is provided with a fixing portion, and the fixing portion is provided with a first connecting hole; The connecting piece is provided with a threaded hole for being screwed with a bolt, and the first connecting hole is arranged opposite to the threaded hole so that the bolt passes through the first connecting hole and is screwed with the threaded hole.

2. The battery box according to claim 1, wherein: The connecting piece is a steel piece, an aluminum alloy piece or a copper alloy piece.

3. The battery box according to claim 1 or 2, wherein: The receiving space and the fixing portion are respectively located on two opposite sides of the first box body along a first direction.

4. The battery box according to claim 3, wherein: The axis of the first connecting hole is parallel to the second direction, and the first direction is perpendicular to the second direction.

5. The battery box according to claim 4, wherein: The nominal diameter of the threaded hole is D, and the dimension of the connecting piece in the first direction is L, wherein 1.1≤L / D≤2, optionally, 1.2≤L / D≤1.

7.

6. The battery box according to claim 4 or 5, wherein: The connecting member is a long strip structure extending along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

7. The battery box according to claim 6, wherein: There are multiple threaded holes, and the multiple threaded holes are arranged at intervals along the third direction.

8. The battery box according to any one of claims 3 to 7, wherein: The fixing portion is configured with an installation cavity for communicating with the first connecting hole, and the connecting member is located in the installation cavity.

9. The battery box according to claim 8, wherein: The connecting piece is bonded to the cavity wall surface of the installation cavity.

10. The battery box according to claim 8 or 9, wherein: At least one of the two opposite surfaces of the connecting member along the first direction abuts against a cavity wall surface of the installation cavity.

11. The battery box according to any one of claims 1 to 10, wherein: The threaded hole comprises a first threaded hole section and a second threaded hole section which are connected; The connecting member includes a body and a protruding portion connected to each other. The protruding portion protrudes from a surface of the body. The body is configured with the first threaded hole section, and the protruding portion is configured with the second threaded hole section.

12. The battery box according to claim 11, wherein: The height of the protrusion protruding from the body is h, the nominal diameter of the threaded hole is D, 0.5≤h / D≤2; optionally, 0.7≤h / D≤1.

5.

13. The battery box according to claim 11, wherein: The height of the protrusion protruding from the main body is h, 0.5mm≤h / D≤50mm; optionally, 5mm≤h / D≤30mm.

14. The battery box according to any one of claims 1 to 13, wherein: The first box body includes a plate, and the receiving space and the fixing portion are respectively located at two opposite sides of the plate along a first direction; The edge of the plate is bent to form a bent structure, and at least a portion of the bent structure forms the fixed portion; or, the first box body also includes a side frame bar, which is connected to the edge of the plate, and at least a portion of the side frame bar forms the fixed portion.

15. The battery box according to claim 14, wherein: The battery box further includes a second box body, the second box body is connected to the fixing portion, and the first box body and the second box body are arranged to form the receiving space.

16. The battery box according to claim 15, wherein: The second box body is provided with a second connecting hole for the bolt to pass through.

17. The battery box according to claim 15 or 16, wherein: The fixing portion is connected to a connecting portion, the connecting portion protrudes from a surface of the plate facing the receiving space, the connecting portion is located in the second box body, and a sealing member is provided between the connecting portion and an inner wall of the second box body.

18. The battery box according to any one of claims 14 to 17, wherein: The fixing parts are arranged on two opposite sides of the plate along a second direction, and the first direction intersects with the second direction.

19. The battery box according to claim 18, wherein: The first box body also includes a first sealing plate and a second sealing plate, one of the two side portions of the plate relatively distributed along the third direction is connected to the first sealing plate, and the other side portion of the two side portions of the plate relatively distributed along the third direction is connected to the second sealing plate; the first sealing plate, the second sealing plate and the plate are jointly arranged to form the receiving space, and the first direction, the second direction and the third direction are perpendicular to each other.

20. The battery box according to claim 18 or 19, wherein: The first box body also includes a plurality of mounting beams connected to the plate, the plurality of mounting beams are located between the two mounting parts, the plurality of mounting beams are arranged at intervals along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

21. The battery box according to claim 20, wherein: The plurality of mounting beams are located at a side of the plate facing away from the receiving space.

22. The battery box according to claim 20 or 21, wherein: The first box body also includes a first module beam and a second module beam for connecting to the battery cell, the first module beam and the second module beam are located in the accommodating space, the first module beam is connected to one of the two sides of the plate relatively distributed along the third direction, and the second module beam is connected to the other of the two sides of the plate relatively distributed along the third direction.

23. The battery box according to claim 22, wherein: Along the third direction, the first mounting beam is arranged opposite to the first module beam, and / or the last mounting beam is arranged opposite to the second module beam.

24. The battery box according to any one of claims 14 to 23, wherein: The plate is a heat exchange component used for exchanging heat with the battery cells.

25. The battery box according to any one of claims 1 to 24, wherein: The fixing portion is used to be connected to the mounting fitting via the bolt to achieve mounting of the battery box.

26. A battery, wherein: A battery box comprising the battery box according to any one of claims 1 to 25.

27. An electrical device, wherein: Comprising the battery of claim 26.

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